sparky

iTrader: (1)

03whitegsr: I reread post number seventy and now it makes more sense to me. Thanks!

scheides

iTrader: (10)

Sweet build! Stock BOV definitely leaks, with a turbo of this size its certainly worth swapping out. I used the cobb bov and saw pretty awesome gains right on the dyno, something like 20+whp on a dyno dynamics.

Thanks for all the pics, good work!

240Z TwinTurbo

iTrader: (25)

Thanks...I had a Tial QR BOV shipped to me yesterday so that will be my project for this weekend.

240Z TwinTurbo

iTrader: (25)

I thought it would be good to show the difference between the RevHard setup with the 0.82 a/r & 0.63 a/r compared to the short runner tubular TS with T4 1.06 a/r.

spdracerut

iTrader: (2)

Wow, looks like you gained about 800rpm in spool up with the twin-scroll 1.06 vs. the revhard and 0.82.

eTiLiKo

iTrader: (1)

Is the 1.06 housing that you are using the one from ATP?

I'm thinking that for this level of boost a GTX3071 will do also the job.

sparky

iTrader: (1)

I may be mistaken, but I'll bet that he is running Garrett 740902-13. This housing is a 1.06 A/R, free-float, T4 featuring a 90mm V-Band outlet. It is a twin-scroll(divided design). Incidentally, the housings for the GTX3076R turbos are the same as those for the GT3076R.

AFAIK, ATP does not have a free-floater, divided, 1.06 T4, V-Band housing, for the 3076 turbos.

240Z TwinTurbo

iTrader: (25)

Although I purchased the housing from another source, the ATP housing is the same unit that I run. The housings are originally for another application, but raw castings are obtained and then cut for the GT30R turbine wheel.

eTiLiKo

iTrader: (1)

I'm under the impression that the T4 option that garrett sell isn't a twin scroll!!!
So the only TS housing is the ATP one...

deeman101

iTrader: (34)

Shouldn't you be seeing more than low 400s on a 64lbs/min wheel with that much boost?

Awesome spool up though. Its very impressive especially considering stock long block.

CO_VR4

iTrader: (83)

Garrett does offer a twin scroll 1.0 A/R T4 housing. I don't know that they have a 1.06...

sparky

iTrader: (1)

I stand corrected then as it appears that Garrett does not cast a 1.06 divided T4 turbine housing for the 3076.

240Z TwinTurbo

iTrader: (25)

I posted the results of plugging the BOV and the car made 444hp/378ft/lbs @31psi on 93 octane. The new Tial BOV arrived on Friday, but I won't be able to install until next week. Once the new Tial is installed I will work with Tom to finalize the tune. I hope that when I install the GSC S2's I should get better results.

240Z TwinTurbo

iTrader: (25)

ATP lists that turbine housing as being "Garrett Turbine Housings."

You can click the check box to have it cut for the GT30r turbine wheel.
1.06a/r T4 Twin Scroll

deeman101

iTrader: (34)

Thats more like it! I was afraid the extremely short runners would cause high back pressure and limit top end horsepower. But if there is any, its certainly not affecting you by much.

I didn't know you were on pump gas btw (with 31psi!). Great results!