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      01-20-2013, 10:17 AM   #41
spool twice
Rainbow Racer
 
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Drives: S65B40
Join Date: Sep 2010
Location: Sarasota, FL

Posts: 1,233
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Quote:
Originally Posted by pits200 View Post
How do you guys get the boost to taper as you approach redline. Are you playing with Wastegate DC and changing the numbers at higher boost to increase the taper. I'm getting 13psi at redline and want to limit that.
It depends on the tune, I don't have the ability to mess with Wastegate DC without affecting the wastegate default position and therefore, WG rattle issue's may creep up.

I just set mine to target X boost and let the JB4 take care of the rest and target redline boost within +/- .2psi

I cranked up boost from:

1500 15.4
2000 16.7
3000 17.3
3500 17.5
4000 17.5
4500 17.3
5000 17.2
5500 16.8
6000 14.2
6500 12.2
7000 10.9

to

1500 15.4
2000 16.7
3000 17.3
3500 17.8
4000 17.8
4500 17.5
5000 17.2
5500 16.9
6000 15.6
6500 13.7
7000 10.9

so far so good, i upshift at 6300rpm though. I'll probably keep these settings, the car seems happy with it, other than having the sensation of some wheelspin once the boost cranks up at 3000rpm in 3rd gear, but that will bound to be better once the weather gets warmer
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