Kozmic built 08 X MR 471/346

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Dec 10, 2016 | 05:27 PM

#31

PDCC_EVO

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Joined: Apr 2010

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From: Sulphur, LA

Quote:

Originally Posted by letsgetthisdone

I think you're simply at the upper limits of the stock frame turbo with the restrictive exhaust housing. Back pressure is limiting boost, probably not the wastegate. This is evident by how boost gets up there, and then tapers.

If you had a GSR (manual trans), it would probably be making around 550whp because the SST loses about 7-10% on the manual. And since you're on a mustang dyno, you're also getting about 10% lower numbers. So a GSR with your setup on a dynojet would be right around 580-600 I bet...

You're probably right. Motion Lab tuned an MR with the same turbo and had the same issues. They replied to my post in EvoXForum that they upgraded the gate and still had the issue. They recommended trying the dual port turbosmart and seeing if that works. May just yank the whole turbo kit and exhaust and sell it and get a full frame turbo kit.

Dec 10, 2016 | 09:09 PM

#32

turbo addict

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From: Omaha

Quote:

Originally Posted by PDCC_EVO

Gtx3582 is what 75 lb per min turbo. You should have some left in it. Which is why I talked myself into this kinugawa actuator. Dual port, bolt on and a bunch of springs to pick from. And only $85.

Feb 6, 2017 | 09:21 AM

#33

cerealkeller

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Joined: Oct 2012

Posts: 82

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From: PA

Did you do all those mods at once? If not, can you tell me how your spool was affected when you did either cams or the cams and engine build together compared to the turbo alone? I'm just curious how my spool will be affected when I do cams and engine build this summer. Running EFR 7163 twin scroll now with full bolt ons. Peak TQ at 4100 RPMs. I'd really like to pick up 300 RPMs worth of spool or more with a stroker build and cams. If I can get back to stock spool, but with an extra 200 HP over stock, it should be a hell of a lot of fun.