In need of some wisdom My car is a 70 skylark with a 462 stock head, unknown isky cam, eldbrock intake , holly 870 cfm carb, full msd ing. TH-400. GM 12 bolt rear w/ 3.73 and 33 splin axles. 90/10 with moroso tricks in the front and 50/50 in the rear all on 28x10 MT ET streets the car has run a best (worst) of i can only hold the car at the line to about 1800-2000 rpms with out creaping thru the lights. 60' ...1.870 330'....5.409 1/8 ...8.421 mph...81.02 1000..11.050 1/4.....13.285 mph....100.64 What is the next step. What intake and carb? also what cam? heads? Tranny / converter? should i run thank you Brandon :3gears:
Brandon - It looks like you have all of the right parts. How much experience do you have tuning and racing? I would expect you be able to run one to one and a half seconds quicker with your combo sorted out. Also your MPH seems low for the parts you have. Have you looked into fuel delivery - what pump are you running? Should be a Stage 1 type mechanical at least. Also check all of the rubber lines, make sure they are not rotted or cracked. Timing - start with 20 degrees mechanical advance in the distributor, 12-14 degrees initial, for a total of 32-34 in by 1500 rpm. Can't help you with the Holley as far as jetting, but make sure that all of the linkages etc. are working right and full throttle is really wide open. Are you spinning tires all the way down the track? Try launching easier and rolling into the throttle. Even with drag tires, wheel spin kills your ET. Somebody else will give you better advice than I have. Best situation would be for you to hook up with some other Buick racers at the track for tuning help. Don't be shy - most guys are more than willing to help! Just look for an event near you, or find somebody local and head out to test-n-tune together. Do it, and you'll be in the 11's in no time!
Thanks for your help , its all in the tune now i have no wheel spin at all it my tranny / convetor thats killing me the 1st to 2nd shift takes way to long and so does the 2n to 3rd i think that is why my mph is low. i also no nothing about tuning a carb? Any one in south florida ????????
I don't know much at all about it (like almost nothing), but based on what you are saying about launching, would guess you would run a little better with a higher stall convertor. - Freed
As for convertor... if this is primarily a street car with a couple of trips a year to the track, I wouldn't go over 3000 RPM stall or you'll never have it locked up except on the highway. Also, the revving gets annoying just running to the 7-11.
The car see almost no street duty. i am wanting an all out race set up for the convertor and tranny. My Plans inclued alum. heads new cam and intake + carb any ideas????
