Please comment on dyno results....
Thread Starter
Instructor
Joined: Feb 2005
Posts: 185
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From: IL
Please comment on dyno results....
99 A4 w/borla and K&N CAI....dyno on a DynoJet was 300RWHP and 305TQ....
...then added 3.90s and S3200 Yank TC and LTHs....
....same dynoJet results were 317RWHP and 341TQ.
We thought the headers would add about 25-30 rwhp, but was also told the gears & TC could have effected dyno #s.
Experts....your thoughts???????
...then added 3.90s and S3200 Yank TC and LTHs....
....same dynoJet results were 317RWHP and 341TQ.
We thought the headers would add about 25-30 rwhp, but was also told the gears & TC could have effected dyno #s.
Experts....your thoughts???????
Burning Brakes
Joined: Jul 2000
Posts: 1,134
Likes: 1
From: Arlington Texas
Originally Posted by 1999 Vette
99 A4 w/borla and K&N CAI....dyno on a DynoJet was 300RWHP and 305TQ....
...then added 3.90s and S3200 Yank TC and LTHs....
....same dynoJet results were 317RWHP and 341TQ.
We thought the headers would add about 25-30 rwhp, but was also told the gears & TC could have effected dyno #s.
Experts....your thoughts???????
...then added 3.90s and S3200 Yank TC and LTHs....
....same dynoJet results were 317RWHP and 341TQ.
We thought the headers would add about 25-30 rwhp, but was also told the gears & TC could have effected dyno #s.
Experts....your thoughts???????
Race Director
Joined: Dec 2003
Posts: 12,599
Likes: 1
From: Texas
I'm no expert but that seems right. The gears should cost you around 10hp and I don't know if the torque converter will cause you to lose any.
So 317 + the 10 lost from gears puts you around 327, a good gain.
Did have the 3.15 gears or 2..73s? Either way with the extra power, TQ converter and those gears I bet it's a BIG difference!
So 317 + the 10 lost from gears puts you around 327, a good gain.
Did have the 3.15 gears or 2..73s? Either way with the extra power, TQ converter and those gears I bet it's a BIG difference!
Thread Starter
Instructor
Joined: Feb 2005
Posts: 185
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From: IL
Yes, it was tuned....they are Grizzly headers. (had the 3.15s originally)
The car feels real fast!!!! I just want to be sure the dyno #s seem about right for the mods (and cost) I invested!
The car feels real fast!!!! I just want to be sure the dyno #s seem about right for the mods (and cost) I invested!
Last edited by 1999 Vette; Jun 17, 2005 at 08:21 PM.
Burning Brakes
Joined: Apr 2003
Posts: 1,140
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From: GOCC - Rebels Without A Clue Santa Barbara, CA
This is typical. There are several posts on this topic. When you run a lower gear most say that they see around 10-15 HP loss. This is all due to the way a dyno calculates HP. I'm sure the ole SOP tells you different. 
Instructor
Joined: Feb 2005
Posts: 190
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I have an A4, 03', with a Vortec and corsa, I had 306 HP and 309 Torque. No tune. Also had at the time 2.73 gears. I now have 3.42 (just got them in today) and the car seems much faster off the line, however I have to drive it easy for about 500 miles. On Monday it goes in for a dyno tune and adjustments. Hope this helps alitlle.
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Dont get overly concerned with dyno numbers although yours seem to be right on the money for your mods. The larger the converter the more power it robs, 