Dyno #'s with LE2 heads
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I guess it could be valve float, but I would be surprised to see it recover, climb and reach peak power after float has started. Usually, once it starts it's just downhill from there. I really don't know what that looks like--almost like you get 10 degress of knock retard or something, setting it back but allowing it to climb again.
These are new heads and you had the same problem before? Did you use the same springs and are they set up the exact same way? What are the installed spring heights? Did you double check them yourself?
I hope you get it figured out as it seems like an odd problem and I'd be curious to find out the cause. Once you get it straightened out you'll have a real monster it looks like.
These are new heads and you had the same problem before? Did you use the same springs and are they set up the exact same way? What are the installed spring heights? Did you double check them yourself?
I hope you get it figured out as it seems like an odd problem and I'd be curious to find out the cause. Once you get it straightened out you'll have a real monster it looks like.
Exactly, if it's a valvetrain problem it usually doesn't recover unless it'sa odd resonance, which the beehives don't have one major resonance so I would feel safe to rule that out.
Bret
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Joined: Mar 2002
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From: Ocala, Florida
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Joined: Mar 2002
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From: Ocala, Florida
Well I'm gonna try adjusting the rockers with the motor running and see if that helps at all, maybe I didn't find 0 lash very good with the motor off, + it was sitting for a couple months so I'm sure a few of the lifters bled down by then.
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Joined: Nov 2001
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From: Louisiana, USA
Nice gain, Lloyd does realy nice work on these LT1 heads. Just and FYI guys I saw 2 smallblock Mustangs down at a local dyno. One made 355rwhp on a Mustang dyno and has been 10.20's@128mph, the other 310rwhp, 10.60's@124mph. Both cars are lightweight coupes and have loose converters but it shows what you can do with a little horsepower and the right setup. Later Clint
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Joined: Aug 2006
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From: Kansas
Nice gain, Lloyd does realy nice work on these LT1 heads. Just and FYI guys I saw 2 smallblock Mustangs down at a local dyno. One made 355rwhp on a Mustang dyno and has been 10.20's@128mph, the other 310rwhp, 10.60's@124mph. Both cars are lightweight coupes and have loose converters but it shows what you can do with a little horsepower and the right setup. Later Clint
id love to transplant my motor into something lighter
ie. fiero, 240, 300zx, rx7.....the idea keeps sounding good, but the checkbook doesnt always agree
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Joined: Nov 2001
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From: Kansas
If your opti was dropping spark completely then the ARF on the dyno graph woulda showed it... I didnt see any sudden changes. My guess is lost timing rather than lost spark but good luck. Did you get a new GM opti?
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Joined: Mar 2002
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From: Ocala, Florida
Ordered an MSD cap/rotor. I was getting dyno tuned so he adjusted the a/f, I'll have to throw it back on the dyno with the new opti to make sure the a/f is good.
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From: Jackstandican
The highest I dyno'd before the heads was 375rwhp, the baseline I put down yesterday was 391rwhp, then I ended up with 405rwhp. So I gained 30rwhp over my old heads before I sent them to Lloyd, and I gained 14rwhp over the baseline I put down on my old tune for the old heads.
How much does your car weigh?
