Im with suba on this, spending more money on a turbo thats going to be restricted by the engine internals and that would gain you only 15-20hp is not good £ per HP value.


Handling and brakes are far higher up on my todo list, would much rather spend 2k on a big brake conversion than getting any more HP and anyway, if you wanna compete properly in 1/4 mile events, go get a scooby

Lol@akeme.

Im buying handling mods aswell at the moment. Many irons in different fires

Ross

and if you want to win go get a sky line/supra although whats that got to do with anything lol

Ross - the torque and bhp rating of the standard internals is a guide only, and with the variances between rolling roads taken into account you are never sure. Sure Flea and Doctorfrag have run over 350 bhp on the standard internals, but they both ran aquamist.....

I know you want someone to say that your engine will be fine if you upgrade to a bigger turbo, but maybe it will - maybe it wont.

don't forget one of those cars is now having a rebuild due to the pistons not being up to it

Thanks Si. Its a gamble i know.

I even called Barbz today and spoke to him.

He's doing well and gives his regards to everyone.

He basically said there is no way to tell aswell.

He said that he's seen engines running 310lb/ft and run well for ages but there is others that have let go.

Ross

Yeah that is in my mind aswell.

Ross

You selling that GT28R anytime soon then?

I'm sick of journal bearing turbos, I'm on my 3rd one in 9 months (new rebuild) and it's just started smoking

go for it h2ypr it gives u a good resaon to do a rebuild when the engine blows .

but what if a rod goes and takes out more than just a rod? It will add quite a bit more to the already large bill!

what is your final target power figure? if you are going to go for a GT2871R then you will obviously push the car to around 400bhp! so then the standard internals almost certainly won't be up to it! so you might aswell get the internals done before the turbo change! It's not as if your car is a slouch in the meantime!

but if you are going for RS/RSR then maybe you might get away with it! like suba says, you might not!

trust me on this, it isn't nice for something to go and have a massive bill staring you in the face with no prior notice and also to have the car off the road for such a long time!

I totally agree with you Mark. My car was running around 350BHP and eventually one of the pistons fell apart. I remember talking to DoctorFrag after he sold his car and we were saying that my car was currently the most powerful car with sdtandard internals.... And sure enough soon after it let go!

If you get a GT28RS, make sure you don't map it agressively, and I would not go for more than 300bhp.

However, after my rebuild I should have a 450+bhp coupe

Thanks for the advice guys.

I think I'm just gonna save for forged and then change it all at the same time.

Ross

Question.

RSR inlet is 3"?

Now i have a TI SIP. Is this 3"? Presumably the gt28r is a smaller inlet. Did the TI SIP come with a reducer hose?

Ross

hello,

In France, lot20, regt20 and others french guys are running GT28 R or RS since 1 or 2 years with no problems...
at 1,4 1,5 bar boost>>> (300 to 328 cvx on RR).
(and permanent runs on Friday and saturday)

well an RSR is an R with an RS compressor wheel so why would the inlet be any different to that of an R?

*EDIT*

Weird i dont think mine had a 3" inlet...

Yes.


Shouldn't be. Sell it and get a non tapered SIP from ProAlloy

I`ve got a rsr with a tapered TI sip,just get shot of the `humped hose` that fits the r and get a hose that goes from 2 1/2" (think thats the sip size) to 3 "..........I was unsure if thsi would cause a restriction,but when i asked Barbz,he told me this is what Marcus ran ,think he got about 380 bhp

think I got mine from Rallye Design, just checked mine internal sizes 61mm to 79mm

my advice for what it`s worth, go for forged internals,it will save you money in the long run,and means you can stop worrying about it going BANG (within reason)and concentrate on making it going faster