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Old 06-26-2008, 10:40 PM
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You guys are great! Funny thing?? Went out last Friday for the first cruise down to the local gearhead spot, really started runnig progressively worse. Got it home and won't even idle. The PV problem was there but it seems that I developed a vacuum leak somewhere. So... tonight just said the hell with it! On the way home from work stopped and bought a 4.5 to replace the 6.5 on a guess (because I don't have a vacuum meter) and a new set of plugs. Came home and changed the PV in like 15min flat, easy as hell! Cahnged the plugs, checked everything that could be leaking vacuum (couple thing kinda loose), started it up and found my idle. Yeah!! Still doesn't seam as strong as I would hope for so printed the manual for the carb from rechecked the bowl levels and started on the idle mixture. HMMM?? this was fun (without the gauge) it said adjust til you have maximum RPM...Hmmm?? That a ****! Damn cam! Engine shaking and I really didn't hear all that much of an increase. A matter of fact I had to open them up about 7/8 more than the factory setting. 1-7/8 total out. Tomorrow driving it in to work, stopping by a local shop to get a vacuum reading, get the correct PV (vacuum @ idle divided by 2) and dial it in the rest of the way. Tell you one thing, need more power!!! no ****! Just sold an 02 WS6 w/ cam intake TB and MAF work done and it would walk this thing. Look up guys... what kind of gains would I get from stock 882 heads to the 2.02 humps?? 50hp? be worth the 100 bucks and a days work switchen em. Humps only have a few miles on them.
Thanks again

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Old 06-27-2008, 09:07 AM
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If you have the double humps already then yeah they're probably worth it. The compression will be significantly higher with the 64 cc chambers. Several years ago I had a similar engine to yours with 882 heads. Kinda like yours the cam was a bit too big. I changed to doublehumps and it matched better with the cam. It was definitely better. A few years after that I switched to dart heads and it was another big jump in power. Basically what I'm saying is yes the doublehumps would be better, but aftermarket heads would be even better. If you can do it for $100 plus gaskets, that is mighty tempting.

Also, you might want to check that the doublehumps have accessory holes. Mine were 461 heads that didn't have accessory holes. They worked fine but it was a bit of work making brackets for the alternator etc.

One last thing, you should pick up a vacuum gauge. They're cheap, probably $10 and a great tool.

81 Grand Prix, 355, 700r4, 8.5" 4.10
64 Oldsmobile Jetstar, all original
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Old 06-29-2008, 04:09 PM
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Thanks dh79, I will P/U the gauge and I think I'm gonna jump on the hump for a cheap fix. The specs on that cam call for 10.5:1 and the 8.8 just isn't doin it for me. Went out this weekend for a spin and found a few other things that need to be buttoned up. No biggy, just little stuff. Carb seems to be pretty close though. Thanks for the help everyone!
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