- Mgb timing specs TIMING COVER OIL SEAL REPLACEMENT Apr 30, 2010 · For the earlier models with the timing marks at 6 O'Clock or the bottom of the crank shaft pulley you can use a product like this to make it easier in the future, but you have to get it right the first time: Useful product for early models => MGB Timing Tape Kit 1962-1974 For static timing watch this video: information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. 90mm 1798cc 18G, 18GA - 3 18GB on - 5 ~70psi at 3000rpm ~50psi idle Steve wrote: > > Here's my setup: I have a '77 MGB with a Lumenition kit installed. 025in. I see Moss recommends changing the distributor to their #143-110 vacuum advance distributor - which seems to Jan 17, 2024 · i replaced my stock cam at 138,000 miles due to excessive wear on the lobes. I’m changing my cam in my 1275 (long story, but it was necessary). Aug 28, 2007 · The point at the top, on the right (I assume the timing marks are on top of the cover), is TDC. (I had a 71 B for 20 years. MGB MGB Ignition Timing. My apologies to the more experienced mechanics for bringing up such a well-worn topic. at Apr 22, 2019 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. You are advised to verify the correctness of these specifications prior to using them. i had a toolmaker at work make a 7 degree offset crankshaft key to get the cam dialed in . Standard MGB is in the range of 170 – 180psi (hot engine, open throttle). I’m installing a Mini Spares Evolution001. Forgot where I got the spec, but set timing at 28 BTDC @ 2200 RPM, vacuum disconnected. You may end up with a setting of 14-17 BTDC at idle and that's perfectly fine. MGB cams are steel and so can be successfully welded. Last Modified - 03/05/01. As you have a 69 MGB, the timing arrows are on the bottom on the chain cover at the front. The only way you can do static timing is to turn the distributor CW with the key on, while you watch the plug for #1 cylinder spark by grounding it externally. 8 cui, 46. My confusion is about the timing of this cam. The car has a weber carb 32/36 dgv,elec fuel pump, a flamethrower distributor, no cat converter or smog equipment-should the car be timed different. 016, . Feb 22, 2009 · MGB Static timing a MGB w/ a Crane Electronic Ignition. With that, you set the timing light to 32* and when the mark on the pulley lines up at the 0 mark you are actually at 32*. Fortunately the camshaft nut is also 1 5/16. Mar 5, 2001 · Technical Information (MGB 20) Camshaft Choices and Lifters. As you face the front of the engine, the furthest mark clockwise is Top Dead Center (TDC). MGExp. any help would be great Thanks Aug 6, 2023 · Okay, I’m normally a pretty sharp guy, but I’m confused on this one. I'd start at 12 BTDC at idle, vacuum disconnected (then later tee'd into the carb instead of the manifold. Runs fine, but just trying to find a chart to compare timing at different RPMs. i still have temps of Oct 9, 2018 · 1967 MG-B with a 25-D distributor. To set timing by this method: Oct 29, 2020 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. My Haynes manual sez 12 degrees BTDC at 600 RPM. 41 mm) Rotation of Rotor: anti-clockwise: Dwell Angle: 60 +/-3 degrees: Ignition Coil Strobe timing at full advance. The specs are a bit difficult to follow because there is much assumed by the cam grinder. com A few thoughts to clarify some of the misleading things posted above. 014 to . 18V, big valve head, Compression ratio TBD but north of 9. ) Every MGB and Midget distributor made from 71-80 has a "smog" timing curve, and they got worse as time progressed. Also, try to be precise with your timing - use a timing light on the front pully, use the stock specs and run through each one until something Mar 19, 2015 · I am in the process of assembling my engine and have a few questions. Timing is CRITICAL! So – to answer your question. Hi everyone, About a year ago, someone on the forum mentioned that you could simplify your adjustment of the valves by getting each valve into the proper position as directed by a manual, opening the lock nut, turning the screw until it was all the way tight, then back it off 1/2 a turn. This is the best method for ensuring best power. Started by Old and In the Way; Dec May 2, 2020 · Hi According to the manual, the ignition timing of my 79 MGB should be 10 BTDC static or 13 dynamic. i installed a crane cam which had bigger lift and duration as there was not much to pick from 30 yrs ago. 014" of lash and 1. 0, +. Original spec is: Inlet opens 16˚ BTDC, Inlet closes 56˚ ABDC, Exhaust opens 51˚ BBDC, Exhaust closes 21˚ ATDC, maximum inlet lift @ 110˚ ATDC, Maximum exhaust lift @ 105˚ B Most cam providers are going to give you a set of specs, asking you to advance the camshaft timing from the ground on lobe centerline, 3-4 degrees advanced is common. Started the car and it sounds great, running at 800-900 RPM then turned it off. Checked for vacuum leaks all around carbs, top of the exhaust manifold, spraying WD-40 to check for changes in engine speed. Menu There is a good discussion on this topic if you search - Kelvin Dodd finally explained that the single row timing sprockets were a standardization effort with the Austin America (?) - and the Austin had different cam timing. The engineers notes, that came with the car, says he set the timing at 12 dg BTDC, to run on unleaded as the valve seats had been replaced. Book says 10-13 degrees. Started by rovernut; Sep 24, 2004; That's a good figure for an earlier MGB. Tried to set static timing at 15°BTDC on cyl 1 ala John Twist but couldn't get it to work. Oct 5, 2016 · The "flywheel" is not visible as it is within the clutch bellhousing. Your driving style will determine the best timing setting for you if the distributor is still stock. We downloaded a degree wheel from the Internet. The engine is then said to have maximum advance. Mar 24, 2019 · I can't get the timing of my new standard camshaft from Moss to agree with the published factory data. from the Distributor Doctor. I serviced an MGB-GT that was running ok, but a little while after the service it began to run rough – getting worse and then not starting at all. Now we could reinstall the cylinder head. Bought from UK and now living with me in Stockholm. i have problems to get the timing right. 6 kW / 63 PS / 62. The later car specs say 10 degrees at 1500 rpms, but I doubt that will be enough advance. also i have a custom radiator (new) is just bigger than the original on the mgb. Clamped vacuum accessories pipes off but no difference Replaced a couple of gaskets on carbs - which helped a bit Jun 15, 2023 · Probably beat to death here, need specs for a stock 67 B, original engine, rebuilt 40897 distributor. They did this buy changing the key slot in one of the two timing gears in the single chain system. 015in Sparking plugs: N9YC Gap: 0. We printed the wheel, cut it out and glued it to our harmonic damper. co. > I replaced the stock ZS carb with a Weber 32/36 DGV with manual choke. 050" at 8. Static Ignition Timing : Dynamic Ignition Timing: 1971-1972 - 16º BTDC @ 1500 rpm; 1973-1974 - 11º BTDC @ 1500 rpm: Timing Mark Location: Notch on crankshaft pulley, pointers on timing chain cover: Distributor Make/Type : Contact Breaker (points) Gap. do any one knows what is the proper timing for this engine? i do imagine is similar than the old 2. Dec 8, 2013 · The advance curve in your distributor is pretty close to ideal until you pass 3000 rpms, when it keeps advancing and advancing. i used a degree wheel to dial in the cam according to the specs on the new cam card. Menu Mark-The Original Equipment synthetic rubber front crankshaft oil seal is technologically obsolete and should be replaced with a higher performance National brand oil seal (National Part # 1873) as a long-term solution in order to preclude leakage. Menu Specs datasheet with technical data and performance data plus an analysis of the direct market competition of MG MGB in 1977, the model with 2-door roadster body and Line-4 1799 cm3 / 109. By changing to the double row chain you would advance the cam back to earlier specs, and should gain some low-mid range performance. . Menu Feb 12, 2021 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. The timing mark is on the pulley (vibration damper) It is a small notch, which will be more visible if you dab it with white paint or correction fluid, as will the timing arrows. Menu Feb 16, 2024 · I figured the timing chain would slip off easily but of course you have to undo all the assorted nuts holding the gear clusters on. Dec 23, 2020 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. Oct 21, 2011 · The D9 cannot be installed by just lining up the dots. Menu. Specifications listing with the performance factory data and ProfessCars Mark-The Original Equipment synthetic rubber front crankshaft oil seal is technologically obsolete and should be replaced with a higher performance National brand oil seal (National Part # 1873) as a long-term solution in order to preclude leakage. thanks Jim Oct 9, 2022 · Anyone who ever had an MGA or MGB “B” series engine apart is familiar with the difficulty aligning the timing marks on the cam timing gears. > I'm still running with vacuum advance (at least I think since I connected > the vacuum line to the Weber via the *switch* located near the > master cylinder). Jet size, main: SU 0. 1965 MG MGB GT specs, 0-60, lap times, performance data, price, top speed, engine specifications, pictures, updated February 2025. The install itself went smoothly and everything looks good. Then there was an MG Midget 1500, same problem, replaced the condenser again and the problem re-occurred. MGB MGB ignition timing. 035in Carburetter Type To 1973: Twin SU HS4 >From 1973: Twin SU HIF4 USA Market also had single Zenith 175CD/5T from 1974/76. 26mm 88. 5". Feb 16, 2024 · The original MGB 18V engine had a single row timing chain that altered the timing to offer more power at the low RPM end. 4l chevrolet with a 390 holley carb. Well, we don't have 1. 283 at the camshaft. , see above. Menu Nov 30, 2017 · Here are the common KB specs ( and what the cam card said) Spec's Duration @. Started by tdskip; Feb 9, 2007; Replies: 5; MG. There are 5 jagged teeth spread out over about 1". PLEASE HELP SUPPORT MY MOTORING ENDEAVOURS! If you like Mar 1, 2016 · What are you supercharger guys running for timing and did you change the distributor as Moss recommends? I plan to add a supercharger to a stock '69 GT with stock distributor. VIN is GVADJ1AG518415. Car does not ping and starts easily, but this would be 35-40 BTDC! Anyone else running more running then the bo information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. mgexp. We retarded the timing to 27 and did another run. The figures given will refer to stroboscopic/ dynamic timing and also to static timing. ) Oct 20, 2007 · On 18V engines (1972-on) the timing marks will be on the top passenger side of the harmonic balancer/timing cover. Cam timing: Power output: 80. 050 lift at valve ( rocker installed ofcourse) Dec 6, 2008 · Raising transfers is still a VERY viable way to keep the stock tranfer timing specs when lowering the jug for a tighter squish clearance. That's around a total timing figure of 36 degrees - perfectly safe!!! See full list on mgparts. 3 degrees before top dead center (BTDC) if you had . This revised timing was likely better for the single carb set up that came a little later and quite possibly helped with lower emissions as well. Distributor points gap: 0. Apr 2, 2006 · General and specific technical specifications of the MGB. Using a dial indicator, we finished timing the cam to APT’s specs. Splash feed What are you supercharger guys running for timing and did you change the distributor as Moss recommends? I plan to add a supercharger to a stock '69 GT with stock distributor. 1" divided by 16. Mar 26, 2010 · Check in the handbook or workshop manual for the correct timing figure for your engine, use the engine number prefix to identify the figures relevant to your MG. 050" lifter rise) to establish valve timing sequences and MGB Torque Specifications Area of Use Torque (ft/lbs) Notes General Use Gearbox remote control cover to tunnel 44 to 46 All models Hydraulic brake pipe connection, 3/8 UNF 5 to 7 Hydraulic brake pipe connect, 7/16 UNF 7 to 10 Alternator shaft nut 25 to 30 All models Interior mirror special screw 5 All models Jan 14, 2007 · Unfortunatly I've found with my other Spits that these timing figures in the manuals are completly interpretive at times, and really helps if you know the year of the ENGINE and DISTIBUTOR in your car. However, no guarantee or warranty is given to the accuracy of the above information. Sep 20, 2023 · The timing marks on the timing cover. timing chain and sprockets, valve stems, distributor drive. You have a Midget, so its timed from underneath, unless you buy a timing pointer kit to relocate the marks to the top side. Does Mar 26, 2010 · Check in the handbook or workshop manual for the correct timing figure for your engine, use the engine number prefix to identify the figures relevant to your MG. Disconnect the vacuum advance. 090in, Zenith: 0. May 13, 2010 · An easy to read table of common MGB specifications for model years 1965-1970. That's around a total timing figure of 36 degrees - perfectly safe!!! There are 2 basic methods of setting timing – static (engine not running) and dynamic (engine running) (also known as stroboscopic). Mar 8, 2019 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. I drove it down to NAMGBR last year from Whitehorse Yukon to Calgary and back (6000km) and it ran great. nz May 13, 2010 · An easy to read table of common MGB specifications for model years 1965-1970. 016 265, lift . I get the timing and the carb balance and mixture dialled in a lot closer to the mark on my 1980 MGB. www. The pulley is 5. 25" wide. the timing was off by 7 degrees. May 17, 2019 · Drive the car in 4th gear, wide open throttle from 1500-3000 rpms. Use a dial back timing light set to 32 degrees. 100 Needle recommendation: Various according to Apr 12, 2024 · The standard for MGB's is to have the timing set to 32 degrees total advance, but I found mine runs sweet at around 33 all in. The proper way to check the cam timing is to use a degree wheel before the engine is assembled and installed in the car. After 1975: 0. 030, otherwise stock w/ HIF4's Delta KC grind cam (Same as Brit-Tek 270C) 217 @ . Mar 25, 2017 · This document provides instructions for setting the base ignition timing on an MGB GT engine. Mar 24, 2019 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. To set this, you need a dial-back timing light. 36 to . Forum List; Latest Topics Table Feb 24, 2008 · Im trying to time my 1980 mgb as it failed smog The problem is my 5 tooth timing mark has no degree setting on it so could an expert tell me what the degrees on the markings should show so I can try to time the car I sanded the area around the timing marks and cant seem to see anything. Menu Mar 16, 2018 · Working on a 1977 MGB for a friend. Jun 27, 2020 · Earlier today I turned the engine over to get to 10 degrees BTDC, took out the 25D distributor and changed the condenser, low tension lead, rotor and points, gapping them at 15 thousand. Menu Jun 15, 2023 · Probably beat to death here, need specs for a stock 67 B, original engine, rebuilt 40897 distributor. Nov 24, 2016 · Well, he's timing an MGB. I've had a quick look at the marks with a timing strobe, at 600 with the vacuum pipe disconnected, the timing looks around the 15 dg BTDC. 5. Technical specifications for MG / Abingdon's MGB GT V8 at the time of market introduction. The VIN number is only 14 characters long. The cam card specs assume that the intake valve would be open . Mine doesn’t run great at 13 dy Apr 10, 2019 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. Menu MGB GT 72-74; VEHICLE IDENTIFICATION; Vin Plate : Vehicle Number Location : Body Number Location : Engine Number Location : Gearbox Number Location : TUNE UP; Rear Axle Number Location : Engine Firing Order : Valve Rocker Clearance. This site: Feb 9, 2019 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. MGB Cam Specs: Lucas/Delco Alternator Swap: Check out the 1972 British Leyland Portof Entry Price Sheet: Spridget Cam specs: O/D Switch Access Hatch: Fantastic Alternator Reference: MGB Spring Spec: Polished Carbs: 100's and 100's of MG related links: A Stumble At Cruise - Resolved Apr 2, 2006 · Check your handbook or manual for the static timing settings, the MGB 18GG and 18V engine has a static advance setting of 10 degrees before top dead centre. Mar 3, 2008 · My understanding is they retarded cam timing by 4-5 degrees,in the smog motors. I'm trying to determine the correct timing and I need your expertise. Remove timing cover bolts, including two from the sump, and remove timing cover complete. Generally, the timing on an engine advances steadily as the engine speeds up – but only to a certain point. However, John Twist of University Motors (YouTube) is recommending 32 BTDC. O. Once the timing chain was off I noticed what could potentially have caused a big issue at some point. Menu Ignition Timing Varies with Engine spec. 8l. Today I will just talk about the actual job of degreeing the cam, as in using the degree wheel, and dial indicator. After this speed is reached no further advance takes place. Menu Jun 17, 2015 · I have had several instances of condensers failing within a few 100 miles of installation. By now, we’d also installed our adjustable timing gear set and chain. 016 in (. I am no expert on these cars – just a keen enthusiast – but I hope these posts will be of interest to others with a similar interest. 465:1 rockers. This could be different on your car, so check before doing anything by reading a service manual. Look at the row of pointers on the timing cover, the longest pointer indicates top dead centre and the others are spaced at 5 degree intervals before top dead centre. When I consult the MGB Workshop Manual is refers me to the Workshop manual supplement AKD4957 which sez 11 degrees BTDC at 150 Jun 20, 2010 · i have a 3. Jul 30, 2013 · A common figure for MGB timing is 32* at around 3500 - 4000 RPM, with the vacuum line to the distributor disconnected and plugged. 405) Timing Events Intake 28 to 56, Exhaust 56 to 28, L/C 108* Here are the new specs provided by Scott at Delta . Previous owner installed electronic ignition. Feb 25, 2017 · Just picked up a 1974 MGB and I'm doing a tune-up. Menu Sep 28, 2019 · information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. Mar 6, 2020 · In reply to # 4094436 by fast-MG. also specifying all measurements made @. If the distributor is to be removed, make corresponding marks on the distributor and timing cover. Static Ignition Timing: 10º BTDC (HC), 8º BTDC (LC) Dynamic Ignition Timing: 14º BTDC @ 600 rpm: Timing Mark Location: Notch on crankshaft pulley, pointers on timing chain cover: Distributor Make/Type : Contact Breaker (points) Gap. I wish I could bring you information on every camshaft out there, but unfortunately, there are so many grinds available it would be a momentous task to actually check each individual cam (for comparison reasons) using a standardized checking method (. Keep advancing the timing until you hear the engine ping, then retard the timing 2 degrees. I can only suggest going back to fully stock and setting to factory specs from there, unless of course you have a very good knowledge of the characteristics of each of the components of the timing system on your car. I see Moss recommends changing the distributor to their #143-110 vacuum advance distributor - which seems to Jul 9, 2017 · I have an 1980 mgb roadster, RHD. information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. On earlier engines they will be at the bottom center of the harmonic balancer. Five degrees = five horsepower. Mark the distributor body relative to the center line of the rotor arm. It involves using a timing light to measure the current timing, then loosening the distributor clamp and rotating the distributor clockwise or counterclockwise in small increments to advance or retard the timing as needed. Sign In; Forums. i have 7 inch fans x2, and a 12 inch fan (puller). MGB Cam Specs: Lucas/Delco Alternator Swap: Check out the 1972 British Leyland Portof Entry Price Sheet: Spridget Cam specs: O/D Switch Access Hatch: Fantastic Alternator Reference: MGB Spring Spec: Polished Carbs: 100's and 100's of MG related links: A Stumble At Cruise - Resolved Dec 23, 2006 · MGB Static timing a MGB w/ a Crane Electronic Ignition. A mechanic is trying to set the timing but can not find the engine information in any of the books. com . , (At valve . I checked with a timing light and it was 1 1/2 inches before the timing tab. 5" * 360 ~= 25 degrees. Mar 26, 2010 · Check in the handbook or workshop manual for the correct timing figure for your engine, use the engine number prefix to identify the figures relevant to your MG. Circumference is therefore 16. The following data is presented in good faith based on information from various sources. Apr 26, 2009 · T he 1977 MG B specs state that at idle (850 rpm) the timing mark should be at 5 degrees BTDC (before top dead centre), and for 1500 rpm at 10 degrees BTDC. Engine number we think , not easy to see is 18V847H3415. Static timing. The timing marks span 25 degrees of the crank pulley. 38 mm ) cold: Idle Speed: 850 rpm 18V, 900 rpm 18GF, 18GH, 18GJ, 18GK: Static Ignition Timing : Dynamic Oct 16, 2024 · The factory timing curve was actually one of the first "smog" curves designed for passing emissions more than for performance so your distributor may be causing issues. Seem like a huge difference. Regrinding a good condition stock cam will allow an increase in both lift and duration but unless re-heat treated will become marginal for longevity. 6. I've read other forums, and the big green book, but I but still have questions. This time we got 57 horsepower. 5 hp (SAE net) of power, 117 Nm / 86 lb-ft of torque, 4-speed manual powertrain for North America . I came back later to check the t information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. 050, 262 @ . I gapped the points, and set the static timing per John Twist's vi Feb 6, 2010 · Note to folks out there timing thier cam with a normal timing gear set, and planning on using a offset keyway to get their advance, say you buy a noraml timing gear set, and cam that has center line of say 106 and the cam grinder recommends you advance it 3 degrees to 103, never just assume that menas you need a 3 degree keyway, you need to May 7, 2008 · 1978 Mg midget 1500 is timed to the stock timing marks. If there are 5 timing marks, t Dec 10, 2014 · In combination with the camshaft timing, this gives a good guide to the compression ratio as well as providing background information for setting up the ignition timing. 284 cam lift, 24-59 @ How to set the timing Check in the handbook or workshop manual for the correct timing figure for your engine, use the engine number pre- fix to identify the figures relevant to your MG. The change came at about the same time that MG went to single carbs, so it all worked out for the best. 41 mm) Rotation of Rotor: anti-clockwise: Dwell Angle: 60 +/-3 TIMING GEAR C0VER. Menu From the Parts Catalogue 18GJ would be the same, although by this time non-North American 18GG and GK engines had the timing marks on top: Peter Basher writing on the MGOC MGB Technical forum shows this version on his 1970 which appears to have four pointers. This is running on premium 97 octane fuel. ( The cams are identical) Mar 17, 2019 · Timing can be VERY difficult to get exact, and is impossible if any components are worn or not standard. The workshop manual says dynamic timing 13 dg BTDC at 600 rpm. Static timing This method employs the timing marks Nov 12, 2022 · 4. Remove crankshaft pulley. When the cars were new, static timing was quite satisfactory as the distributor would still have been performing as designed. Each point is 5 degrees. 015 in (. Trouble comes from upsetting the symmetrical flow pattern on all 4 transfer windows. fxia tcbkt ayhhj uzr grvk vtlm pkneky gaer paba jgsaqg chkbu kvprm fanm gwl pln