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Hello to all. I have a 1974 Porsche 914 that has a 2.8 motor which I installed. It is a 1982 Citation x11 engine. The bore and stroke are standard and the CR is 8.9:1. Cam is a Crower solid lifter SPL grind #D-4046. Rocker Ratio is 1.50:1. Manifold is a Edelbrock Torker 2 and carb is a Holley 390 4barrell. Engine has modified S10 Headman headers. Mallory ignition with a non-computer Hei distributor. The engine bolts up to a stock 914 trans. with the help of an adapter plate. I am not the engine builder and am not very good at getting engines to run well, but I am trying. The engine sounds fantastic without a load on it and doesn't run too badly, but it just isn't right. I think the timing curve is all screwed up and when I add vacuum advance, it runs worse. Can someone please suggest a correct advance curve that I can try and some info. on Hei distributors and which one should be used for this engine? Thanks in advance for any info. Pete
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Set base timing at 10* BTDC to start (might vary because of the cam and mods) and have all advance in by 1800~2000 RPM. Total advance (again depending on what it likes) should be in the neighborhood of 34~38 *BTDC1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
Because... I am, CANADIAN -
1800-2000? damn thats early, at least compared to SBCs...Originally posted by betterthanyou View PostComment
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It is but if you look at performance distributors on the market they are typically all in by 2000. Hotter cams will require more advance as well.1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
Because... I am, CANADIANComment
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I set the initial timing to 10-11 BTDC last night and then checked to see what it was doing @2000 rpm and it was only at 21. ( this was done with the vac adv disconnected) Does this mean that my centrifical advance springs need to be changed? Lighter or heavier? I know they can be different springs at the same time. ThanksComment
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