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GT2871R max boos on stock internals. #1625748
05/10/2018 17:28
05/10/2018 17:28
Joined: Oct 2018
Posts: 2
EU
P
PortableLife Offline OP
Newbie
PortableLife  Offline OP
Newbie
P

Joined: Oct 2018
Posts: 2
EU
Hi everyone,

I could use a bit of advice.
My T28 blew and I had to get a new turbo.
I got the GT2871R and the ECU chip on the car is GTEC1

I want to go forged and get it mapped next year, but that's next year.
How much boost can I run with this turbo on stock internals?
Since everything else is stock I should be ok up to 250BHP, if not mistaken.

Please advise.
Thanks.

Re: GT2871R max boos on stock internals. [Re: PortableLife] #1625750
05/10/2018 18:05
05/10/2018 18:05
Joined: Feb 2007
Posts: 3,472
London Tan
technics Offline
I need some sleep
technics  Offline
I need some sleep

Joined: Feb 2007
Posts: 3,472
London Tan
You are fairly safe on stock internals upto 330-350 ish bhp with moderate boost.
The only thing is that turbo you have will flow a fair bit of power even at 1 bar.
Maybe thats a good starting point for that turbo is 1 bar and get it on the rollers to check power and fuelling until you are ready to forge it.
You will also need supporting mods, ie downpipe and exhaust, possibly clutch and injectors etc etc


Now in the 400+ bhp club!
Re: GT2871R max boos on stock internals. [Re: PortableLife] #1625753
05/10/2018 20:16
05/10/2018 20:16
Joined: Oct 2018
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PortableLife Offline OP
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PortableLife  Offline OP
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Joined: Oct 2018
Posts: 2
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Thanks technics,

but without supporting mods?
I would keep the stock IC for now.
How far can I go with the stock pump and injectors?
0.9 bar?

Re: GT2871R max boos on stock internals. [Re: PortableLife] #1625761
06/10/2018 13:24
06/10/2018 13:24
Joined: Jan 2006
Posts: 9,867
SW London
suba Offline
Je suis un Coupé
suba  Offline
Je suis un Coupé

Joined: Jan 2006
Posts: 9,867
SW London
I would not run that turbo without supporting mods and properly mapped by someone that knows what they are doing, otherwise any 'safe' boost level is simply guess work.

You'd be far better off getting a 2nd hand standard turbo, and running that until you are ready to do it all properly.

For what it's worth the stock pump is on it's limit around 300bhp assuming it's getting good voltage to it, slightly more for the stock injectors unless you raise the fuel pressure a bit, then they will max out at 340 - 350 bhp or so.


Rotary fun - 370 bhp per ton. GT30's are small you know?!??!?!?!
Re: GT2871R max boos on stock internals. [Re: PortableLife] #1625769
06/10/2018 18:37
06/10/2018 18:37
Joined: Feb 2007
Posts: 3,472
London Tan
technics Offline
I need some sleep
technics  Offline
I need some sleep

Joined: Feb 2007
Posts: 3,472
London Tan
Yeah that turbo really needs to be done properly. Stock pile the parts and get it all done and mapped in one go and forged.
Cheaper in the long run to do it once and do it properly.
Youll go from 220 bhp to around 400ish depending on exact spec of turbo and can run 1.6 - 1.8 bar of boost and not worry.


Now in the 400+ bhp club!

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