my question to HPI regading spec2 Turbo

[whistla]

i sent this email last night and got a respons back just now, this may be alittle informative for some

Dear HPI,

Firstly, top magazine! Quality publication, keep up the excellent work!

I own a 1998 Series2 R33 GTSt, with a 3” turbo back exhaust, large front mount intercooler and a Wolf3D version4 engine management.

Its tuned at a safe 10 pound of boost and have booked it in for more boost and some extra tuning.

Iv been hearing a lot of “he said, she said” about the turbo in the series2’s

Facts id like clearing up:

1.What turbo does the spec2 RB35DET have? (some say T3, others say T28)

2.Is it true that the spec2 turbo as a nylon impeller?

I want to dial up boost to 12 pound with the stock turbo for the time being.

Would this be safe for the impellers integrity? Iv only ‘heard’ that it shouldn’t pass 10pound, but no one can provide me with evidence or fact (experience) to prove it

James “sick of shit talkers” Geros

Bens Response:

As far as I know, Nissan didn't use a nylon impeller until the R34 GT-t, but it doesn't matter anyway, as the ceramic turbine wheel is the problem and all GTS Skylines are the same here. 12psi may be okay, but there are no guarantees. We have seen turbos let go at this boost. Others seem to last okay at 14psi.

As for the T2/T28 question, the answer is neither, as it is not a Garrett turbo. It's made by Hitachi. The exhaust manifold flange is a T3 shape, but the turbo size is closer to a T28.

Ben Ellis

[ex-static]

Cheers for cleaing that up james, we are still none the wiser

[2rismo]

So this seems to suggest that any T3 based turbo should bolt on to the factory manifold.

Doesn't it?

Cheers.

[A31_Cefiro]

Correct. Any turbo with a T3 flange should bolt straight on. Other things you'd need to consider are the other connections to and from the turbo.

[Guest INASNT]

whistla

who did u get to tune your wolf 3d? and would you recommend it to others?

[whistla]

Rank Rotory have done alot of the tuning...AEM (Wolf makers) had a go at it, but frankly i think there was more potetial there

im getting the boost upped (some other work) and more tune at Rank on monday, i do recommend them but iv also heard good things about ICE

i belive ICE do your tuning?

i like to stick to one place, purely cos Pete at Rank knows my car well now and dont want to change for the time being

[Guest INASNT]

Originally posted by whistla

Rank Rotory have done alot of the tuning...AEM (Wolf makers) had a go at it, but frankly i think there was more potetial there

im getting the boost upped (some other work) and more tune at Rank on monday, i do recommend them but iv also heard good things about ICE

i belive ICE do your tuning?

i like to stick to one place, purely cos Pete at Rank knows my car well now and dont want to change for the time being

what made you decide on puttin in a wolf comp instead of a powerfc or microtech plugin?

yeah ice and race pace motors know their stuff 2