we rebuilt the motor 350 for my sons car it was running 14.70s last yr now it runs 15.80s with new motor only change was a cam and pistons due to 30 over my ? is why did it slow down after rebuild what to try next found dist was messed up now fixed tried carb changes is it transmission??? just at a loss here banging my head any help here i appreciate it
confused??????
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Without a lot more info hard to say. Only guess is that the new cams power band is not being efficiently utilized causing the ET loss
we were hoping to be in the 13.80 range before i had dist fixed the car was first run off of trailer was a 14.19 then has been anywhere from that to 20 sec but has leveled off at 15.80 range have thought about putting old cam back in what more info u need to help me out let me know thank u
84 monte 350 bored 30 over edelbrock performer intake 650 holley vaccuum secondary turbo 350 trans and 373 posi rear u need any more info let me know thanks for any input
old cam specs vs new cam specs... same with the pistons... did you re-use all the old accessories? water pump, alternator, power steering? only reason i ask is cause i know when my brother blew the water pump in his chevelle he didnt have funds at the time to buy a good one so he bought a cheap one and the drag the cheap one caused slowed him down by a whole second... 6 passes, all a full second slower... two weeks later he did nothing but change to a better pump and shaved that second right back off...
dont have specs on old cam will get specs on new cam and pistons old were small dome new ones are 3.5 cc dome and block decked and shaved 12 thousands off head to give compression ratio of 10 to 1 and all is the same as last yr accessories
Perhaps the combination of timing, compression and octane is causing detonation? Maybe the converter isn't a good match for the cam? Was the cam degreed during installation? Can be a lot of things.
Where is most of the performance being lost? 60' times? 1/8 mile times? 1/4 mile trap speeds?
Where is most of the performance being lost? 60' times? 1/8 mile times? 1/4 mile trap speeds?
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