Can you check the math on the HP + Torque increases of these mods?
12-03-2004, 07:20 AM
#1
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Can you check the math on the HP + Torque increases of these mods?
<center><img src="http://pictureposter.audiworld.com/48471/s4_mod_upgrades.jpg"></center><p>
Do these numbers look right? I was trying to calculate my total gains based on getting a Hyperflow + Milltek + DPs...I realize this would be best case scenario.
Any input/info would be great...Thanks.
Do these numbers look right? I was trying to calculate my total gains based on getting a Hyperflow + Milltek + DPs...I realize this would be best case scenario.
Any input/info would be great...Thanks.
12-03-2004, 07:40 AM
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Ok.
If all of these hp gains were measured at the same rpm and at the same rpm as the engine's peak hp, you could think about adding them. But it doesn't work like that. Each gain that you've listed is at a different rpm. And each mod will be affected by the other. Impossible to quantify increases like that.
12-03-2004, 07:45 AM
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I don't know much, but those look very high to me...
From what I've read at APR's site, your going to get about 25 crank HP from a full exhaust. So, the crank column for both the exhaust mods combined should be about 25 HP. The Miltek can't be more than say 20% better and I think that's a very generous estimate.
APR also claims to get about 35 lb-ft at the crank from their exhaust.
I just checked Stratmosphere and they are claiming 40 wheel ft-lbs and 30 wheel HP for the combination. That seems *way* high but I could be wrong. Maybe they meant at the crank?
Anyone else have comments?
APR also claims to get about 35 lb-ft at the crank from their exhaust.
I just checked Stratmosphere and they are claiming 40 wheel ft-lbs and 30 wheel HP for the combination. That seems *way* high but I could be wrong. Maybe they meant at the crank?
Anyone else have comments?
12-03-2004, 07:47 AM
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Easy there dojo...it's an honest question and I already STFA.
In my TT and A4 many of the mods ended up being cumulative, so I wasn't sure what to believe. I saw a few posts from JD that had his estimated numbers up in this neighborhood for HP + Torque.
I guess my biggest concern was using a factor of 1.28 as the drivetrain loss...I found that via searching the site and felt the numbers looked a little high to me.
I guess my biggest concern was using a factor of 1.28 as the drivetrain loss...I found that via searching the site and felt the numbers looked a little high to me.
12-03-2004, 07:50 AM
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So only way would be to get a dyno output from a car w/ all of these mods done, right? JD's car?
Doesn't JD have all of these mods and dyno numbers? I searched but didn't find any dyno printouts from his runs.
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12-03-2004, 07:53 AM
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Gotcha...no prob. I STFA and found lots of posts, but nothing conclusive.
I wish these tuners/vendors/dealers would dyno all of these products - both individually so you could see the results of installing one mod and also a dyno graph for the whole package deal.