B7 A4 Stock vs. GIAC "Sport Chip" vs GIAC "Sport Chip" with Full Exhaust.
02-13-2006, 03:51 PM
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B7 A4 Stock vs. GIAC "Sport Chip" vs GIAC "Sport Chip" with Full Exhaust.
Hi Everyone,
Thought you guys would find this interesting.
Front Trac B7 A4
GIAC Sport Chip (same file for both chipped runs)
Milltek 200 cell cat
Labree cat back
91 octane
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/std_GIACsp_catexhGIACsp_hponly.jpg" border="0" alt="Image hosting by Photobucket"></a>
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/std_spGIAC_spGIACcatexh_tq.jpg" border="0" alt="Image hosting by Photobucket"></a>
It seems that the new cars really like a good exhaust and cat.
83 whp at 6500!
Below information was added 2/14/2006 to answer questions that were posed.
Some questions were posed after the original post. Here they are along with some answers.
**"It also just shows that the giac file is more optimized for an exhaust than with a stock exhaust":
There is no software adjustment to optimize for exhaust. Due to the pump limitations if you have an aggressive file with the early "B" pump and you add an exhaust it may cause a problem. The dyno charts shown are for the GIAC "Sport" chips which are the mildest and should work under most conditions and pumps.
The more aggressive files are done for most of the transverse cars, the long motored cars are being worked on now.
**GIAC's sport chip only runs 1 psi more boost than stock.
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/Boost_std_schip.jpg" border="0" alt="Image hosting by Photobucket"></a>As we can all see the boost is 200-300 mbar (3-4.2 psi) higher than stock with a 17.5psi peak.
**"Very good numbers Jeff. Out of curiousity, what happened on that stock cars dyno? Looks like the stocker lost almost 30whp from 5500rpm to 6500rpm? cheers! Mike:"
When testing began some common things were tested. Here are some plots of the same car with stock software in 3rd vs. 4rth gear.
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/b7a4_std_3rd_vs_4rth.jpg" border="0" alt="Image hosting by Photobucket"></a>
We tested both the stock setup and the GIAC files under the harshest conditions to give the most realistic gains.
**"Does that dyno run for stock say 134Hp??? My stock dyno baseline was 179.1Hp"
At the point shown the power was 134whp. The peak number was 167whp in 4rth gear and in 3rd gear the peak was very close to yours. The intention was to show the whole power band gained. As you can all see from the 3rd vs. 4rth gear dyno above load play a major role on power delivery on this system. With the GIAC chip the power band is noticeably and usefully extended. Peak numbers are as follows:
226whp Turbo Back with GIAC "Sport Chip"
201whp GIAC "Sport Chip" only
167whp stock
Thought you guys would find this interesting.
Front Trac B7 A4
GIAC Sport Chip (same file for both chipped runs)
Milltek 200 cell cat
Labree cat back
91 octane
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/std_GIACsp_catexhGIACsp_hponly.jpg" border="0" alt="Image hosting by Photobucket"></a>
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/std_spGIAC_spGIACcatexh_tq.jpg" border="0" alt="Image hosting by Photobucket"></a>
It seems that the new cars really like a good exhaust and cat.
83 whp at 6500!
Below information was added 2/14/2006 to answer questions that were posed.
Some questions were posed after the original post. Here they are along with some answers.
**"It also just shows that the giac file is more optimized for an exhaust than with a stock exhaust":
There is no software adjustment to optimize for exhaust. Due to the pump limitations if you have an aggressive file with the early "B" pump and you add an exhaust it may cause a problem. The dyno charts shown are for the GIAC "Sport" chips which are the mildest and should work under most conditions and pumps.
The more aggressive files are done for most of the transverse cars, the long motored cars are being worked on now.
**GIAC's sport chip only runs 1 psi more boost than stock.
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/Boost_std_schip.jpg" border="0" alt="Image hosting by Photobucket"></a>As we can all see the boost is 200-300 mbar (3-4.2 psi) higher than stock with a 17.5psi peak.
**"Very good numbers Jeff. Out of curiousity, what happened on that stock cars dyno? Looks like the stocker lost almost 30whp from 5500rpm to 6500rpm? cheers! Mike:"
When testing began some common things were tested. Here are some plots of the same car with stock software in 3rd vs. 4rth gear.
<a href="http://photobucket.com" target="_blank"><img src="http://i33.photobucket.com/albums/d78/J_Moss/Dynos/b7a4_std_3rd_vs_4rth.jpg" border="0" alt="Image hosting by Photobucket"></a>
We tested both the stock setup and the GIAC files under the harshest conditions to give the most realistic gains.
**"Does that dyno run for stock say 134Hp??? My stock dyno baseline was 179.1Hp"
At the point shown the power was 134whp. The peak number was 167whp in 4rth gear and in 3rd gear the peak was very close to yours. The intention was to show the whole power band gained. As you can all see from the 3rd vs. 4rth gear dyno above load play a major role on power delivery on this system. With the GIAC chip the power band is noticeably and usefully extended. Peak numbers are as follows:
226whp Turbo Back with GIAC "Sport Chip"
201whp GIAC "Sport Chip" only
167whp stock
02-13-2006, 07:22 PM
#6
Congrats. Is there something off on that stock car though?
It's a small graph but it looks like it lost almost 30whp from 5500rpm to 6500rpm. I wonder why it did that?
cheers! Mike
cheers! Mike
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02-14-2006, 01:46 AM
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And once again-
You have asked me the same question about the same post on a different forum... Third time...
The runs were in fourth gear. If I were to run it in 3rd the hp looks better and has less of a drop, but torque is lower
The runs were in fourth gear. If I were to run it in 3rd the hp looks better and has less of a drop, but torque is lower