GZP 16T Spyder VR4 Dyno Results!

[Sin'sVr4]

Nice #'s. hopefully you can get the boost creep issues resolved. You should be making more trq than that tho? I made 500whp and 535 trq @21psi falling to 19psi and then spark blowout. Now with the aem twinfire I should be able to hit around 550 whp now and get rid of the iridiums and go with the coppers. What dyno u using? I did mine on a Mustang and was interested in your #'s on what dyno? What size are 16T's comparable with? 16g's? or 15g's? or what? Not sure? They TD04's?

[Hans@GZP]

I have a dynojet dyno. The 443 awhp was uncorrected numbers. I forgot to change it to SAE correction. It dropped the hp numbers to 407 at 16 psi which I find a lot more realistic. It's also running 10.5 afr up in the top end. I could probably sneak a bit more power out of it by enlarging the gap on the plugs and leaning it out a bit.

[Hans@GZP]

Oh, and 16t's are on par with 15g's. They are still a td04 turbo.

[SnakeSkinner]

I have never seen a TD-04 turbo do that "boost creep", Even my DR750 car of I turn the DSBC to 0 it makes strait waist gate boost. After seeing this being talked about here earlier I went out in my DR750 car, turned the DSBC to 0, did a pull from 2500rpm to 7500rpm in 3rd gear then ran it to about 6000rpm in 4th gear and the peek boost recorded was 15.5psi and I have my waist gates set to 15psi.

[mannavr4]

Hans, what are the exhaust specks on that car?

Snakeskinner, what are your exhaust specs?

I'm running the bozzspeed true dual which is 2.25" dual pipes all the way back wich then splits into 4 mufflers so no restrictions at all.

Snakeskinner, I could be wrong but I think your billet wheels help you in two ways. There very light to spool up quick but also very easy to slow down. they dont have the inertia to keep spooling after the waste gate opens. This is only a guess, not sure if you ever thought about that.

[Keyan]

My 13gs never used to boost creep but after my car was tuned, (and only seems to do it in the warm weather...) If I turn my boost controller off, if I make 3 pulls, 2 of them would hold like 7psi, and the third would creep over 12. I may have developed a boost leak tho, I have a whistling noise in my engine bay now.

Blow through maf, gutted pre cats, 3" exhaust.

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[Hans@GZP]

The spyder has CXRacing manifolds and precat eliminators along with the knock off tanabe exhaust. Unported turbine housings.

We put a stock O2 housing on the front turbo and I can get it down to 15 psi at redline.

Matt, I'm sure if this had a higher rate wastegate spring that it would hit 15 psi without any creep. I can set the boost controller to 15 psi and it may creep up to 16 by redline.

[Ninja Performance]

The spyder has CXRacing manifolds and precat eliminators along with the knock off tanabe exhaust. Unported turbine housings.

We put a stock O2 housing on the front turbo and I can get it down to 15 psi at redline.

Matt, I'm sure if this had a higher rate wastegate spring that it would hit 15 psi without any creep. I can set the boost controller to 15 psi and it may creep up to 16 by redline.

A higher rate spring would hold the WG even tighter.

-Chris

[Hans@GZP]

A higher rate spring would hold the WG even tighter.

-Chris

Yea, but it still wouldn't creep any higher than it is now. It's running well at 16 psi, so we're calling this one as "good enough".

[Emilie@GZP]

Just took it for a rip up and down the highway with the top down (thank you 70* sunny weather!!). AND OH MY GOD!!! This thing is AMAZING!!!!!!!!!!!!!!!!!!!!!! It just GOES. I pee'd my pants in sheer glory. Not gonna lie...