GM 847 stock heads dyno was today
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From: Cincinnati, Ohio
Originally posted by SStrokerAce
Your TQ peak is not really 368 because the converter is flashing there, it looks like its more in the 340 range. If your cam was in a M6 then the TQ would be in the 340 range, so that's alot more realistic.
Either way that's a good HP number for a cam only setup.
Bret
Your TQ peak is not really 368 because the converter is flashing there, it looks like its more in the 340 range. If your cam was in a M6 then the TQ would be in the 340 range, so that's alot more realistic.
Either way that's a good HP number for a cam only setup.
Bret
Car is a m6. I dont know why it jumped so hard when they first stabbed it? I know its not totally accurate, but it still did 350 @3900 after the first TQ spike. Guessing it would have made even more down lower. Anyway, its going on a different dyno sometime soon. Looking over the bigger a/f graphs i have, i think the wideband wasnt calibrated correctly. Where the a/f ratio is 12.6-13.0 on my 3rd pull, im down more HP and TQ than i think engine temp would be responsible for. On all 3 a/f graphs it seems to make the most power at 14:1 or so according to their wideband. I went through and made another new tunerCat program which i am uploading tomorrow, kinda combining all my different flashes together to try and get the 14:1 number.
Also going to start lower to get better low end numbers.
(puts on flame suit) finally, everyone that dynoed had their o2s in the 1000s when dialed in on the wideband. This goes against everything i have ever experienced and seen with the sensors. I know they arent accurate blah blah, go ahead and tell me
And yes the car is my daily driver, only car i have
Last edited by atljar; Oct 12, 2003 at 11:55 PM.
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From: Cincinnati, Ohio
Originally posted by 96LT14u2Nv
yeah, those are some great numbers jared!!!! now u know why i am going back to a M6
yeah, those are some great numbers jared!!!! now u know why i am going back to a M6
Anyways, if we all could drive like you and dave can the strip would be full of better numbers
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Originally posted by atljar
I dont have no stinkin convertor Car is a m6. I dont know why it jumped so hard when they first stabbed it? I know its not totally accurate, but it still did 350 @3900 after the first TQ spike. Guessing it would have made even more down lower.
Anyway, its going on a different dyno sometime soon. Looking over the bigger a/f graphs i have, i think the wideband wasnt calibrated correctly. Where the a/f ratio is 12.6-13.0 on my 3rd pull, im down more HP and TQ than i think engine temp would be responsible for. On all 3 a/f graphs it seems to make the most power at 14:1 or so according to their wideband. I went through and made another new tunerCat program which i am uploading tomorrow, kinda combining all my different flashes together to try and get the 14:1 number.
Also going to start lower to get better low end numbers.
(puts on flame suit) finally, everyone that dynoed had their o2s in the 1000s when dialed in on the wideband. This goes against everything i have ever experienced and seen with the sensors. I know they arent accurate blah blah, go ahead and tell me
And yes the car is my daily driver, only car i have
I dont have no stinkin convertor
Car is a m6. I dont know why it jumped so hard when they first stabbed it? I know its not totally accurate, but it still did 350 @3900 after the first TQ spike. Guessing it would have made even more down lower. Anyway, its going on a different dyno sometime soon. Looking over the bigger a/f graphs i have, i think the wideband wasnt calibrated correctly. Where the a/f ratio is 12.6-13.0 on my 3rd pull, im down more HP and TQ than i think engine temp would be responsible for. On all 3 a/f graphs it seems to make the most power at 14:1 or so according to their wideband. I went through and made another new tunerCat program which i am uploading tomorrow, kinda combining all my different flashes together to try and get the 14:1 number.
Also going to start lower to get better low end numbers.
(puts on flame suit) finally, everyone that dynoed had their o2s in the 1000s when dialed in on the wideband. This goes against everything i have ever experienced and seen with the sensors. I know they arent accurate blah blah, go ahead and tell me
And yes the car is my daily driver, only car i have
Bret
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Posts: 3,068
From: Cincinnati, Ohio
Originally posted by SStrokerAce
Mya bad, but something is very odd about that first 1/3 of your TQ curve. The 368 and the 350 bump, seem high and in the wrong spots of the TQ curve.
Bret
Mya bad, but something is very odd about that first 1/3 of your TQ curve. The 368 and the 350 bump, seem high and in the wrong spots of the TQ curve.
Bret
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Joined: Oct 2002
Posts: 6,518
I'm not sure, but it's a dyno problem. Your motor on a engine dyno is not going to peak at 3500 like that, more like 5000. No matter what cam. I would just ignore the lower part and take the 4000 and up part of the curve and call it good.
Bret
Bret
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