Dyno Numbers
12-04-2005, 06:05 PM
#26
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Originally Posted by MarcS
3rd gear pulls will show inflated numbers.
Although it's pretty typical for shops to run 3rd on 5 speeds and 4th on a 6 speed.
You should try pulling in 4th with a gear ratio 'closer' to a 1:1
Although it's pretty typical for shops to run 3rd on 5 speeds and 4th on a 6 speed.
You should try pulling in 4th with a gear ratio 'closer' to a 1:1
Dyno racing is fun, but the buck stops at the track. What's your trap speed?
12-04-2005, 06:17 PM
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jesus im tired of people bringing this up
4th is closer to 1:1 by freaking .07...
on two equal temps and conditioned pulls, that will make a difference of MAYBE 5hp
so either 3rd or 4th is fine...
4th is closer to 1:1 by freaking .07...
on two equal temps and conditioned pulls, that will make a difference of MAYBE 5hp
so either 3rd or 4th is fine...
12-04-2005, 06:19 PM
#30
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Originally Posted by MarcS
3rd gear pulls will show inflated numbers.
Although it's pretty typical for shops to run 3rd on 5 speeds and 4th on a 6 speed.
You should try pulling in 4th with a gear ratio 'closer' to a 1:1
Although it's pretty typical for shops to run 3rd on 5 speeds and 4th on a 6 speed.
You should try pulling in 4th with a gear ratio 'closer' to a 1:1
how is that?
12-04-2005, 06:56 PM
#32
Originally Posted by Dman
jesus im tired of people bringing this up
4th is closer to 1:1 by freaking .07...
on two equal temps and conditioned pulls, that will make a difference of MAYBE 5hp
so either 3rd or 4th is fine...
4th is closer to 1:1 by freaking .07...
on two equal temps and conditioned pulls, that will make a difference of MAYBE 5hp
so either 3rd or 4th is fine...
Here's an example of the difference between 3rd and 4th.
https://www.cobaltss.net/forums/show...t=dyno+4th+3rd
12-04-2005, 07:01 PM
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Yep, 3rd gear on my pulls was near 10whp vs the 4th gear run....it was funny though I kept trying to tell the guy at the shop that 4th gear was closer to 1:1 than 3rd gear...but he insisted on telling me "it didn't matter"...lol, the dyno speaks for itself.
12-04-2005, 08:25 PM
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Originally Posted by Dman
jesus im tired of people bringing this up
4th is closer to 1:1 by freaking .07...
on two equal temps and conditioned pulls, that will make a difference of MAYBE 5hp
so either 3rd or 4th is fine...
4th is closer to 1:1 by freaking .07...
on two equal temps and conditioned pulls, that will make a difference of MAYBE 5hp
so either 3rd or 4th is fine...
Originally Posted by MarcS
The difference is between 3rd gear (1.35) and 4th (0.98), not how much further 4th is away from a 1:1.
Here's an example of the difference between 3rd and 4th.
https://www.cobaltss.net/forums/show...t=dyno+4th+3rd
Here's an example of the difference between 3rd and 4th.
https://www.cobaltss.net/forums/show...t=dyno+4th+3rd
12-04-2005, 08:27 PM
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Originally Posted by Chevypowered
So what makes DVS' dyno numbers believable and mine not? he got ten more with a aftermarket muffler which goes to show that a muffler does more than a cai
his numbers aren't unbelievable... his gains are. i could make your cobalt dyno at 850whp with the press of a button... it's not hard, but those gains with those parts are unrealistic. hell if that was the case, i bet the psi-fi kit would net a 75+hp gain on that dyno lol
12-04-2005, 09:51 PM
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Damn there are some serious knee-biters on here. I know DVS and Chevypowered personally- I wasn't at the dyno, but have raced both of them- they are FAST. I'm in a stock SS/SC, and both of them pulled me by bus lengths (except for that one race where you kept missing gears dvs lol.) Go ahead, call driver error. Whatever.
As i said- neither of these guys are BS'ers so I believe it completely after having ridden with CP and having raced against both of them.
As i said- neither of these guys are BS'ers so I believe it completely after having ridden with CP and having raced against both of them.
12-04-2005, 09:57 PM
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like i said. I find it hard to beleive. my opinion. if hes pushing 250 WHP. theres not but a few on here who r. seems like a short list of mods to get that gain IN MY OPINION.
12-04-2005, 10:34 PM
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When I go and pay to have my car dynoed and I tell the tech to do it in forth and he dosen't thats when I get my money back! Even if it dosen't matter its your money and they should do it!
12-04-2005, 10:52 PM
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Originally Posted by MarcS
The difference is between 3rd gear (1.35) and 4th (0.98), not how much further 4th is away from a 1:1.
Here's an example of the difference between 3rd and 4th.
https://www.cobaltss.net/forums/show...t=dyno+4th+3rd
Here's an example of the difference between 3rd and 4th.
https://www.cobaltss.net/forums/show...t=dyno+4th+3rd
and your little link you posted proves this...look at the times for the first two runs, back to back, first one is third, second is fourth within one minute of eachother...bad idea for comparing dynos
and those numbers for those gears are wrong...
the f35 tranny has 3rd at 1.18 and 4th at 0.89
12-04-2005, 10:56 PM
#43
Originally Posted by Dman
yeah but if thats a back to back run then per say, lets do one in third then one in 4th, thats also a heat soaked engine which WILL give lower numbers regardless
and your little link you posted proves this...look at the times for the first two runs, back to back, first one is third, second is fourth within one minute of eachother...bad idea for comparing dynos
and those numbers for those gears are wrong...
the f35 tranny has 3rd at 1.18 and 4th at 0.89
and your little link you posted proves this...look at the times for the first two runs, back to back, first one is third, second is fourth within one minute of eachother...bad idea for comparing dynos
and those numbers for those gears are wrong...
the f35 tranny has 3rd at 1.18 and 4th at 0.89
Don't forget they did a 3rd, 4th, then another 3rd on that dyno sheet though.
12-04-2005, 11:10 PM
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even a cool down of more than 3 minutes can make a difference when it comes to heat soak on a motor, just watch your coolant temps sometime when you get on it, only difference on this is that you are in open moving air. a fan helps, but not for the sake of back to back runs. the fact that 4th is closer by .07 will make a difference of about 5-7hp, add heat soak and theres your difference. heat soak can make a differnce of 5hp or more...ive seen it...in the same gear too, not different gears...
12-05-2005, 01:56 AM
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Here is the dyno sheet. Sorry, no scanner and the pic from camera came out blurry.
http://www.we-todd-did-racing.com/we...ZkMzF5NTQx.jpg
http://www.we-todd-did-racing.com/we...ZkMzF5NTQx.jpg
12-05-2005, 02:01 AM
#48
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And the stock dyno sheet:
http://www.we-todd-did-racing.com/we...ZkMzF5NTQx.jpg
http://www.we-todd-did-racing.com/we...ZkMzF5NTQx.jpg
