Stage IV (final stage for my SS-Four), Update: July 24th. Options

[malpaso]

One year after "Great SS-Four rebuild" (http://www.6gc.net/forums/index.php?showtopic=78088) was finished I left my car in my mechanic's hands again to start fourth and final stage of my car's build. Goal has two parts:

a) check everything on the car after 12 months
b) just slightly push car higher in terms of power (+20%)

When I have my car back I plan just add some "unnecessary weight" and DONE! All finished.

It has begun!
What I can share now with is just the most important - new parts ready to install

Bigger injectors...



Bigger - custom build/modified - turbine (enlarged housing, enlarged wastegate, polishing, etc...)







stay tuned...

This post has been edited by malpaso: Jul 24, 2012 - 3:08 AM

[delusionz]

it looks like a knock-off gt2876r, would be interested to know what the spoolup is like on that, i have the gt2860rs i get spoolup starting at 2200rpm with over 1bar available from 2800rpm.

Everything i've heard about the 2871 and 2876 is that for the extra 20 - 40 HP over the 2860, they dont spool up any usable boost until 4000rpm!

Also, i had a major problem with overboosting, the wastegate on the T28 housing is far too small for a 3sgte, so i had the internal gate hole ported out to 1mm less than the flap itself. and then what happened? even with the adjustable actuator arm tightened up i lost alot of response, my disco potato was no longer a spool monster!! -- anyhow, i had the hole filled up completely and had the path inside the turbine housing smoothed out and went to a massive 44mm tial external gate, now, finally, it works how i want it. have my cake and eat it, spool monster AND controllable boost!! yay

i suppose in this case it doesnt matter if it overboosts, with those 800cc injectors you're probably running 1.4bar as your low setting hahaha

[Wolf_tm]

it looks like a knock-off gt2876r, would be interested to know what the spoolup is like on that, i have the gt2860rs i get spoolup starting at 2200rpm with over 1bar available from 2800rpm.

Everything i've heard about the 2871 and 2876 is that for the extra 20 - 40 HP over the 2860, they dont spool up any usable boost until 4000rpm!

This is an hybrid based on a real Garrett GT2876R, and it has a quite different behaviour from the pure GT2876.


Malpaso, today I had the last test around home before the final mapping on the dyno, and with the latest map
I made on street, the peak boost is at 3800 rpm in 3rd gear, so probably I will gain other rpm when mapping to MBT on dyno in the next days.
As I told, that's so much better than a normal GT2876R I tested on a friend's ST205 that had peak boost at 4200 rpm.

Definitely WAAAAYYY better than GT28RS that, IN MY HUMBLE OPINION, is quite a wrong turbo for a street 3SGTE, as it gives no more power than a CT20B.... but it is my first choice on my 3SGTE-RAV4!