I got my car retuned form the stock 9 turbo a month ago and the turbo seems to be a bit lazy. Was going to try to figure it out and go back to the rollers to pick up another 25-30 hp if at all possible. I got it tuned at RS motors on their mustang dyno. They said mhi reds usually make about 450 hp there. He said that it seemed to be out of its efficiency range like there was a boost leak or compression issues when he compared my sheet to another's with similar mods. (torque falling off a bit fast and a little slower spool. I Checked comp and its 170+ or -2 across the board and the blt was good to 25 psi. (need to go higher when I get a better setup)

What are some other things I could check out or is the turbo just tired because I got it used. (has zero play)
basic mod list
kelford 272
kiggley springs
custom 1.25 runner twin scroll exhaust manifold
jmf dump
1250cc running e82. rewired dw300 pump
76/84 mhi jb red (unported) with fp 18psi wg
3 port ebc
4" intake
3.5 ets ic and 2.5 piping with tial 50mm
Cb ported Im and ported 65mm tb
3" buschur exhaust.


(original thread when I was deciding on what style of fp red to go with)
https://www.evolutionm.net/forums/ev...ck-hosung.html

 

Can this get moved to the dyno tuning section please? I posted in the wrong spot.

 

No problem! Done!

 

With the way FP designs the compressor housing, 25-28psi blt is usually the best I can get, even with using a tbolt clamp because they didn't put a lip on the inlet.


How used is this turbo? Maybe pull the turbo, and pull the exhaust housing off of it to make sure the volute in the turbine housing isn't broken. A small radial crack is ok/pretty much normal. But if it's broken off, or bent over, it can effect power and spool up. And I just noticed your car is also spooling probably 500rpm lat for a 9. It's spooling about 200rpm slower than my 8, and I have bigger cams.

 

The car is an 8 with 110k and the housing is great looking no crack or anything. I sent it out for coating and really inspected it. Not sure on miles I'll ask the guy I got it from.

 

Ah. Your post said "stock" 9 turbo, so I assumed 9. So your spoolup is a couple hundred rpms slow, and torque falls off early.


If the housing looked good, and shaft play was good, mileage doesn't matter. Turbo's don't "get tired" really. They just fail..

 

It has 15k on it for miles. And here is the guys vd that I got it from but I render it about worthless.

What could be causing the slow spool and torque drop? Or what could i do to gain in those spots?

 

The slower spool up could be JB vs BB. People will say it's not, but I've spoke with others that have tested it back to back and say there can be a 100-200 rpm difference.


This is on E85, right? It seems like they just didn't throw much boost at. My car is over 30psi past 6k rpm before it starts dropping due to back pressure.

 

Correct my ECA was reading right at e82. I do agree that there is room for more duty cycle and nothing was maxed out unless there was a knock issue or something. I remember him saying that the ebc is responding just like it should. (had issues in the past) Maybe im just over thinking things haha. I could log it and see what that shows before I go turning it up more. Maybe that's my next step before I keep thinking its not where it should be as im only making 25ish more hp then my 9 turbo setup at about the same psi.


I appreciate the input!

 

what are your cam settings?

 

Post some logs. Make sure to log: rpm, load, tps, timing, boost, IDC (this will require you to log injector pulse width), AFR (if you can), knock sum, and knock voltage.

 

Both gears are zeroed.


Will do, I have my lc2 logging also.

 

Ronnie is a damn good tuner. I don't think he would've done you wrong

 

He is a great tuner im not questioning that. He told me there is something going on and to look into it and bring it back.He did say he didn't like going over 29psi as in his experience the small frame turbos ware out a lot faster.

 

With proper oiling/oil, that red will do a 32psi spike and taper to 28-29 for better without skipping a beat.