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Post by 1partshelp@gmail.com on Mar 14, 2010 22:51:12 GMT -5
I would like to put this out to you guys and see if anyone can help. I put a new rebuilt 65 400 ci engine in my 442. Because of gas where I live here in Arizona I lowered the compression down to around 9 or 91/2. It seems to run so so except when I put the pedal to the floor in first gear starting from a stop. It picks up for a split second then falls flat on its face. I have set the timing at 71/2 and 10 degrees. I even set it at 5 degrees but no help. 110 octane or 91 octane makes no difference. I have gone thru the carburetor so many times double and triple times and nothing wrong. The cam is a crane cam with the same specs as the stock cam. The harmonic balancer has not slipped but one thing strange though. The part number on the balancer can't be found in any GM parts books.Thanks for everybody listening I hope someone can help me find the answer. Thank you. Jim Hald 602 843-3147
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Post by bubbasz1 on Mar 15, 2010 5:06:58 GMT -5
First thing I would do is time it by the seat of your pants. In other words don't pay no never mind to a timing light and jack it up. If it spark knocks turn it down a little, see if this helps. Second I would measure how many turns the idle screws are out. Should not be more that what came with stock, something like 1.5 to 2 turns but I would have to check to be sure. See if those two don't help.
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Post by slowolds on Mar 15, 2010 10:39:49 GMT -5
Are you sure you are getting fuel. Did you check the lines, filter etc. for flow?
If it idles and accelerates regularly I would think the timing is close. Sounds like you need fuel or carb, adjustments for when you punch it.
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Post by Deleted on Mar 15, 2010 12:01:26 GMT -5
was the cam degreed? my 455 did the same thing when i first got it. it had a jm-20/22 engle cam in it, the guy installed the timing set with the crank sprocket 4* advanced, but crank timing and cam timing are two different things. also, just because the dots are lined up, doesnt mean its timed due to poor manufacturing standards, even on a "good" set. always degree it. when i tore my engine down to rebuild it i degreed the cam just to do it and the cam timing was 12* advanced. the thing had wicked cranking compression and ran like crazy out of the hole and fell flat on its face at like 2500rpm.
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Post by Deleted on Mar 16, 2010 18:41:52 GMT -5
Do you have a 39 degree cam or a 45 degree cam? 1965 blocks use different cams than later blocks. How about the advance in the distributor if you do have the correct cam. If you have no advance check to see why--this will definitely cause a lack of power.
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