QuestionQUESTION: I have a 55 Chevy p/u with a 383 stroker engine in it. I'm running a comp .477/.480 cam with a Holley 670 Street Avenger carb. I'm running the timing around 12 degs. My problem is that there's a hesitation on take off. Can you help me see where I can start looking to try to get the hesitation out? My son told me that if you put your foot behind the gas pedal and pull it up, it dies. Do I need to get a stronger spring and try readjusting the carb? Any help would be appreciated.
Ronnie
ANSWER: Start by raising the floats to just overflow on the inspection ports.
Make sure your accelerator pump is working and engages as the throttle first moves.
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QUESTION: I have another question on this engine. I put a new cam in and apparently didn't break it in right. My oil pressure starts out good, but then drops to around 10 lbs. I called Jeg's where I bought the cam and the guy I talked to said that since I didn't break the cam in right. He said that there is too much clearance between the cam and bearings. Is there anyway to fix this or do I need to replace the cam bearings? He also suggested using 20w50 oil instead of 10w30 that I have in there now. I was thinking of doing that, but was afraid that it might do more damage to the engine since it's a thicker oil. Since the engine and cam are new, I don't want to do more damage than I've already done. I am hoping that I didn't do a lot of damage to the engine, but want to see what I can do, if anything. Thanks for your time.
Ronnie
AnswerIf this is truly what happened the only true cure is to replace bearings but the thick oil can help. So can additives such as STP.
Did this only start after the cam and did it happen immediately or after say 2 weeks?
I have an engine that does this and I have 263000 miles on it and it is going strong with thicker oil.
