Not after what Geoff told me about the 9180. Lag doesn't bother me. It's fun as hell getting up to full boost on this turbo and the wait is killing me and I would need a new manifold anyways.

 

yeah you're right.

You need to:

A) move to washington
B) buy a 4202R
C) lower your hp standards.

 

Or get a bigger hotside? 1.00 housing should be enough.

 

When it falls on its face, is there a miss / hesitation / backfire?

 

That would be um uncorrected I think. It is on a Mustang.

 

Actually I was thinking of doing the BW S4000. It's the older style large turbo and it seemed to do pretty good on spool and made 684 on 24 lbs up here in CO on Tobz car. Turn the wick up a bit and it would be a sick setup. So I am tossing this idea around.

 

I do not believe so. I believe it is the same scenario when we had the 4088 issue. The car would perform great until the turbo couldn't compress anymore air. Honestly the last time I really hammered on it I loved it and feels so strong. But the dyno tells a different story. I just can't tell in the seat that the HP is falling off. Maybe because by that time I am doing well over 140 Mph and my attention is on the road more than the car itself.

 

I'd personally like to see the dyno graph and the tune in the car, particularly the timing map.

Depending on just how drastically it falls off I have a few guesses. If it's really bad, I'd go along with valve springs but don't agree with some of the suggestions for replacements. I don't think it's the cams. It could be the twin scroll housing too, I haven't seen one yet make great power up top if they have any low end at all.

 

720 should be corrected on his dyno.

Thats totally weird hp falls like that but it maintains boost at 35psi.

 

i disagree very much.

 

720, uncorrected on a mustang at elevation? doesnt sound too bad to me.

 

720 uncorrected on a Mustang is intense. I'll explain why. Marcus that owns the 2G DSM auto that has been on Tobz dyno showed his power with a 1.20 or 1.21 correction for sea level to make it right.

So if its a new style Mustang that reads like COBB (read DJ numbers) that would still be a bunch. If its corrected and reads like DBs then thats still not shabby. I am with Dave, we need to see the dyno sheet and timing map.

Aaron

 

That is corrected. All of Tobz numbers are corrected.

Mitch

 

Can you post the dyno sheet up today? I'd like to see it. I'd be glad to look at the map too if you want to e-mail it to me or just take a screen shot and send the timing map.

 

you can't argue with the graphs people have posted, the twinscroll just can't keep up at high rpm.