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Old 11-10-2012, 08:33 AM
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It amazes me that this is such a debate. Serious people??? The car picked up 17 horsepower and 30 torque at the wheels. That is pretty much what you need to know.

It ran 7.9's on street tires before and now if it hooks still I would say a 7.7 is pretty reasonable. Everything else is just bench racing.

Argue the numbers to death or just meet him at the track and watch him whoop your ass
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  #32 (permalink)  
Old 11-10-2012, 09:19 AM
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Originally Posted by brian@snl View Post
It amazes me that this is such a debate. Serious people??? The car picked up 17 horsepower and 30 torque at the wheels. That is pretty much what you need to know.

It ran 7.9's on street tires before and now if it hooks still I would say a 7.7 is pretty reasonable. Everything else is just bench racing.

Argue the numbers to death or just meet him at the track and watch him whoop your ass
Congrats on those numbers, I think they are great, especially on a dyno that reads on the low end compared to others that show stock numbers as much higher.
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Old 11-10-2012, 09:42 AM
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Originally Posted by vichammer View Post
Congrats on those numbers, I think they are great, especially on a dyno that reads on the low end compared to others that show stock numbers as much higher.
I love watching cars that make 440 on some other dyno run high 12's while cars that make 400 on mine run in the 11's

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Old 11-10-2012, 10:04 AM
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Originally Posted by brian@snl View Post
I love watching cars that make 440 on some other dyno run high 12's while cars that make 400 on mine run in the 11's

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Exactly. Case in point, one of my neighbors has a 2010 Camaro SS with heads/cam package and a small nitrous setup. He had some custom tuning done on a DynoJet dyno and got 537/498 hp/tq. A week later his club had a dyno days event which he attended and in virtually identical temperatures and humidity on a Mustang Dyno he got 485/450. Thats about a 10% difference. Thats why dyno's are great for custom tuning when running before and after, but they are not numbers that are in stone that should be used as a comparison with another car run on a different dyno with different altitudes and temps.
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Old 11-10-2012, 12:14 PM
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Well I won't even get into why you should tune your vehicle with a load as opposed to no load. People care more about a higher number on the dyno then they do about a proper tune.
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Old 11-11-2012, 08:30 AM
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Originally Posted by Toxic11 View Post
17-18% is way high for a modern automatic, more like 13-15%
hell, i dunno what happened......lol

either way, like Brian said, the deltas are there.

right now we're just debating on how much drivetrain loss a modern engine gets HAHA !!!!

and i must have had a brain fart because on the dyno that i used in Houston, it was showing @ 14.5% loss....

not even sure why i said 17-18% earlier..

Last edited by Litos; 11-11-2012 at 08:31 AM.
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Old 11-11-2012, 06:12 PM
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Originally Posted by brian@snl View Post
Thanks man, tried really hard to make everything identical for testing purposes. The car I did earlier in the week wouldn't let me post his stuff, didn't want his wife to find out it was tuned
now that is funny.
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Old 11-11-2012, 06:14 PM
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Originally Posted by brian@snl View Post
Well I won't even get into why you should tune your vehicle with a load as opposed to no load. People care more about a higher number on the dyno then they do about a proper tune.
there are garage queens and then there are what we call dyno queens. High numbers <> fast 1/8, 1/4 mile times.
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Old 11-11-2012, 08:05 PM
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I would much rather have a proper tune and realistic delta data. The only reason I chimed in was drivetrain loss. It's not as great in new cars as it used to be with Turdbowl 400's and the like
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Old 11-11-2012, 08:16 PM
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Originally Posted by Toxic11 View Post
I would much rather have a proper tune and realistic delta data. The only reason I chimed in was drivetrain loss. It's not as great in new cars as it used to be with Turdbowl 400's and the like
Agreed, great gains for sure. I just believe the wild card here is the dyno. On a DynoJet most see around a 9-10% loss, but once you strap that car onto a load bearing dyno like a DynoDynamics or MustangDyno, the percentage increases pretty significantly.

My R/T is a pretty prime example of numbers don't mean $#!t lol. It dyno'd a 358rwhp/384rwtq on a dyno dynamics at SHR (about 10rwhp less than the average SRT on a dynojet), but yet I can run mids 12s on drag radials and street tires. lol
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