Miata Turbo Forum - Boost cars, acquire cats.
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Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   GT2860rs vs GT3071r vs GT3582r (https://www.miataturbo.net/diy-turbo-discussion-14/gt2860rs-vs-gt3071r-vs-gt3582r-52724/)

hustler 10-18-2010 01:20 PM
My car on 8.5:1 compression with a log manifold on a GT2860rs .86, and you need to shift the RPM peak torque about 500rpm sooner. The wheel speed function on the dyno wasn't perfect.
Originally Posted by hustler (Post 365880)
lowered static compression sucks at 12psi:
http://i42.tinypic.com/sws48p.jpg
but at 15 (actually 13 and up) the glory of MBT of timing comes through from 4000-redline, and the #'s jump dramatically:
http://i44.tinypic.com/29z1kqt.jpg
AFR:
http://i40.tinypic.com/24qk09y.jpg
advancing timing at 15psi did no good, lol.

my uneducated, misinformed theory:
The gt2860rs "works" and stops overboosting after 13psi.
Lowered static compression "is beneficial" after 13psi or about 220whp (dynodynamics, higher on a dynojet).
After 16psi this turbo started to run out of gas. With a tubular manifold, its a different game and it makes the same numbers at 12psi but hits 16psi at 3400rpm.

sixshooter 10-18-2010 01:36 PM
Originally Posted by Zabac (Post 644892)
Du musst sprechen mit MUSANOVIC, er spricht Deutch sehr gut.
Er hat ein Borg Warner s252 fur seine NB, macht 270 mit nur 12-13psi.
Der Borg Warner is nur $450 neu...
Scheisse! Das ist nicht teuer. Warum habe ich nicht gewusst?

Edit: Where did he find it that cheap?

CDFreak 10-19-2010 07:35 PM
first thanks for all,

who can tell me what Big Throttle Body(65 or 70mm) it fit Plag and Play? good would be one with idle Screw. variable TPS would also be great.

Savington 10-19-2010 07:45 PM
Originally Posted by faeflora (Post 644765)

I also saw an ad in Modified for a GT-X GT3071. It's not on the website now but I would wait for that vs a regular 3071.
Not new news. Different wheel design, like an 11-blade compressor wheel like my Duramax has or something. 10% more flow for the same spoolup. Have they actually announced a GTX30R yet? I thought it was only available in a 40 or a 42 and up.

Savington 10-19-2010 07:46 PM
Originally Posted by CDFreak (Post 645546)
first thanks for all,

who can tell me what Big Throttle Body(65 or 70mm) it fit Plag and Play? good would be one with idle Screw. variable TPS would also be great.
Don't bother putting a big TB on the stock IM, you need to change the IM (unless you have an '02 "squaretop" manifold).

Faeflora 10-19-2010 08:22 PM
Originally Posted by Savington (Post 645548)
ave they actually announced a GTX30R yet? I thought it was only available in a 40 or a 42 and up.
Yes, GT30X and GT35X was in the ad.

CDFreak 10-19-2010 08:26 PM
Originally Posted by Savington (Post 645549)
Don't bother putting a big TB on the stock IM, you need to change the IM (unless you have an '02 "squaretop" manifold).

The Manifold is a Begi Intake Manifold:bigtu:

Full_Tilt_Boogie 10-19-2010 08:42 PM
Originally Posted by CDFreak (Post 645567)
The Manifold is a Begi Intake Manifold:bigtu:
You have one?

CDFreak 10-19-2010 08:48 PM
Originally Posted by Full_Tilt_Boogie (Post 645579)
You have one?
at the moment its on the way to germany;)

on this i won bolt the Big TB


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