Re: I weighed my 73 LeSabre today and 300hp should be enough to get into the 13s
How old is your transmission? One thing I found out is any Buick that has over 130,000 miles or is 40+ years old will have a shot or a weak torque converter. I once had a similar issue with a Sport wagon I built; - 400 built up to as close to Stage 1 as I could get at the time, factory carb all rebuilt, dual exhaust, 3:42 axle and the thing didn't have enough power to get out of it's own way and it chewed gas like there was no tomorrow. Yet, the pressures in the tranny were all good, fluid was fresh, but, it had this habit of slowing down when in passing gear, and it had a vibration that just was undetermined. Figured out that it was all in the transmission, once that was properly overhauled, the car had plenty of power and would shred the tires.
Originally Posted by garybuick
If you have set the engine all up properly and have eliminated all ignition and timing or fuel concerns, then it has to be transmission. Go through the motor once more; a simple thing like the vacuum advance being hooked up on the wrong port can change so many things.
'66 Buick Electra 225 Conv. (Going to finally get this thing finished this winter, since I can't sell it)
'67 Buick Wildcat Custom Conv. (...the Cat came back the very next day...)
'01 Buick LeSabre Limited
'08 Buick Allure (Canadian LaCrosse, and not very "alluring"...)