Rb25det Neo In R32

[zebra]

ahk fair enough then

[The Dan]

only the bastardised ones with "bolt on" rear housings have cropped turbines. the proper gt30s with a proper IW housing have the 60mm turbine

All Garrett GT turbos have cropped wheels except the 60mm one. And the 60mm version came out after the rest so it isn't even the 'original' 3071 that everyone claims it to be.

[The Dan]

go cut 4mm off your turbine and leave it in the same housing, see how it goes.

find out exactly what cartridge you have then find a housing to suit. you cant use a gt30 housing designed for a gt30 turbine if you have a cropped 56mm turbine.

Where are you getting this information?

4 of the 5 GT3071R's come with cropped turbines. I think you are getting your facts mixed up

[JonnoHR31]

yes they do, but they all come with t25 flanged turbine housings too. the only t3 one is the full 60mm version, which is the one everyone on here always talks about and trys to get

[The Dan]

yes they do, but they all come with t25 flanged turbine housings too. the only t3 one is the full 60mm version, which is the one everyone on here always talks about and trys to get

Yeah, the one this guy has is the 700382-12 with a VG30 rear housing though. Sonic do a 0.73 rear housing that can be machined to suit everything from a GT2860RS to a GT3076R -12. It's a T3 flange and Skyline dump compatable.

That is the housing he needs to go to.

It flows more than the VG30 housing so it will take care of his power fall-off problem

[neo32]

bang on with the numbers dan how you know

[neo32]

if i got .82 rear how much response will i lose

[The Dan]

if i got .82 rear how much response will i lose

If you go to a 0.82 rear housing you will need to use the stupid XR6 dump flange so it will need to be modified.

The typical response lose expected from 0.6 - 0.8 would be somewhere around 400 rpm.

But you also have a smaller, more restrictive housing on at the moment.

Moving to the 0.7 rear will allow more flow all round and will retain the skyline 6 bolt dump pattern.

I would say - expect 1 bar at approx 3800 (as that turbo is known to be particularly laggy)

[neo32]

so what ar is the vg housing

i also need to get boost controll sorted as finding that the wastegate flap is too small

so would it just be worth grinding out the hole?

[neo32]

also bearing in mind that i now have full boost well before 3k 1.2bar

[chrisR34GTT]

17.4psi before 3k? That sounds ridiculous, I mean my stock R34 turbo only hits full boost (10.5psi) at about 3200rpm and I thought stock turbos are the some of the most responsive turbos out there... Is my turbo laggy or something?

[morehp2go]

you will need a new rear wheel i think and iam running a .63 and it still comes on boost nice and holds good boost the hole rev range

[nuk1ear]

good to see this finally

[aerofocker]

conclusion?

[neo32]

sorry just looked at dyno and its 15psi at 3400rpm

Edited March 29, 2010 by neo32