Final #s from TTi/402 A6 C6 Inside
#1
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Well, we didnt hit our target HP, but made excellent power none the less. Exhaust is REALLY holding us back quite a bit. The TTi kit uses the factory 2.5" H pipe off the C6 and is connected to a 2.5" B&B Catback.You can tell how the graph falls off up top we are fighting backpressure issues. Not sure how much we could get out of it if we dropped the exhaust, but its pointless as thats not how the customer is going to drive the car so it is what it is.
The #s below are on C12/no meth/16.5lbs of boost. Remember this is a stalled A6 with FULL exhaust![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
![](http://i88.photobucket.com/albums/k176/VengeanceRacing/Melissa165.jpg)
For complete details on the build check out the link below:
https://ls1tech.com/forums/sponsor-v...ce-racing.html
The #s below are on C12/no meth/16.5lbs of boost. Remember this is a stalled A6 with FULL exhaust
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
![](http://i88.photobucket.com/albums/k176/VengeanceRacing/Melissa165.jpg)
For complete details on the build check out the link below:
https://ls1tech.com/forums/sponsor-v...ce-racing.html
#2
9 Second Club
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The exhaust housing on the turbo's is to small. They said they were good for 1000hp and that is pretty close. You would need a T4 and .96a/r to make over 1000RWHP I would think. No way to stuff a larger exhaust housing in there??? Non the less, the customer should be happy.800rwhp is nothing to be upset about. Nice build. If you installed cutout's, you could gain another 100rwhp I bet?
#4
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I agree Chris. We were thinking 60 to 80 possibly with DMH cutouts.. No more room for turbo with the design of this kit. We did pretty much meet our goal of 1000HP, but more is always better ![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
14psi on the street is 7597/737
Its definately an animal with the stalled A6
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
14psi on the street is 7597/737
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#5
Shorty Director
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I dont think the twin 62mm's are running out of steam. I have the smaller turbo's and I have made over 900rwhp and still think I could squeak 1000rwhp if I pushed them. My tq was over 1000rwtq though so I know I was running into back pressure issues, but I think the 62mm's should be an easy 1050rwhp on a 6 speed and those same turbo's have made over 900rwhp on a auto car..
http://forums.corvetteforum.com/c5-f...-1st-pull.html
http://forums.corvetteforum.com/c5-f...-1st-pull.html
#6
9 Second Club
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I dont think the twin 62mm's are running out of steam. I have the smaller turbo's and I have made over 900rwhp and still think I could squeak 1000rwhp if I pushed them. My tq was over 1000rwtq though so I know I was running into back pressure issues, but I think the 62mm's should be an easy 1050rwhp on a 6 speed and those same turbo's have made over 900rwhp on a auto car..
http://forums.corvetteforum.com/c5-f...-1st-pull.html
http://forums.corvetteforum.com/c5-f...-1st-pull.html
#7
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I dont think the twin 62mm's are running out of steam. I have the smaller turbo's and I have made over 900rwhp and still think I could squeak 1000rwhp if I pushed them. My tq was over 1000rwtq though so I know I was running into back pressure issues, but I think the 62mm's should be an easy 1050rwhp on a 6 speed and those same turbo's have made over 900rwhp on a auto car..
http://forums.corvetteforum.com/c5-f...-1st-pull.html
http://forums.corvetteforum.com/c5-f...-1st-pull.html
Vince you can also lock a 4L60E safely. Not something we are trying to do with one of the first built A6s in the country
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#9
OWN3D BY MY PROF!
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I was wondering if this was a reliable DD type setup why you didn't go larger on the displacement? Obviously it's not going to be set on kill where you'll need maximum structural integrity. Why only a 4.005 bore vesus something like a 4.125. I understand you would run into back pressure issues earlier on, but that's an easy exhaust swap away.
#10
9 Second Club
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Ron the exhaust is holding it down big time. Chris is prolly right about the 100rwhp which I know SEEMS extreme but you can never have too much exhaust on a turbo car. My baby incons would gain 50rwhp thru cutouts installed on the 2" y-pipe and they were done at 750rwhp so yalls bigger combo would gain lots more. Now I understand that you have it like the customer wants and it is what it is but if he ever wants more power...... ![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
Bigger exhaust would make it spool faster as well bringing on more torque earlier....making it even harder to hook but we all love that problem.
Anyway, still really great numbers thru coffee stirrer sized exhaust.....I bet he is loving that beast!!!!!!!!!!!!
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
Bigger exhaust would make it spool faster as well bringing on more torque earlier....making it even harder to hook but we all love that problem.
Anyway, still really great numbers thru coffee stirrer sized exhaust.....I bet he is loving that beast!!!!!!!!!!!!
#11
Shorty Director
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Vince you can also lock a 4L60E safely. Not something we are trying to do with one of the first built A6s in the country
... Also I dont think the car in the link was running 2.5" H pipe and catback.... If you have an idea on how to get more than 16.5lbs of boost out of this combo Im all ears.
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
#14
Staging Lane
Join Date: Nov 2008
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Ron the exhaust is holding it down big time. Chris is prolly right about the 100rwhp which I know SEEMS extreme but you can never have too much exhaust on a turbo car. My baby incons would gain 50rwhp thru cutouts installed on the 2" y-pipe and they were done at 750rwhp so yalls bigger combo would gain lots more. Now I understand that you have it like the customer wants and it is what it is but if he ever wants more power...... ![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
Bigger exhaust would make it spool faster as well bringing on more torque earlier....making it even harder to hook but we all love that problem.
Anyway, still really great numbers thru coffee stirrer sized exhaust.....I bet he is loving that beast!!!!!!!!!!!!
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
Bigger exhaust would make it spool faster as well bringing on more torque earlier....making it even harder to hook but we all love that problem.
Anyway, still really great numbers thru coffee stirrer sized exhaust.....I bet he is loving that beast!!!!!!!!!!!!
![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
#17
TECH Senior Member
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Ron,
What stall is the converter and what brand? was it locked or unlocked on the dyno?
Also with a better flowing exhaust, what would you predict the numbers to be?
Im intrested in building a TT C5 within the next year or so and the APS and TTi kit are the 2 I've been looking at most.
What stall is the converter and what brand? was it locked or unlocked on the dyno?
Also with a better flowing exhaust, what would you predict the numbers to be?
Im intrested in building a TT C5 within the next year or so and the APS and TTi kit are the 2 I've been looking at most.
#19
TECH Senior Member
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It wont be till late this year or very early next year before we can even start it. Our house burnt in sept and we arent even back in yet and lots of finances we gotta tie up before we can think about a project car.
However a quick question on the TTi kit. On a C5 do you have to remove the ac or relocate anything?
However a quick question on the TTi kit. On a C5 do you have to remove the ac or relocate anything?