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Garrett 2860-5 Max Spool

CU's GTR

By CU's GTR,
in Engines & Forced Induction

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CU's GTR Contributor

CU's GTR

Posted
Posted (edited)

I have a Gtr r33 and looking to install the Garrett-5's. Installed already is the air intake and 3inch exhaust with a sports cat. What I will be installing with the turbos are: 1125cc Bosch injectors, tomei cams and camshaft, tomei dump pipes. My question is what the max spool on these turbos with the mentioned mods? (What RMP when full boost kicks in?)

What I would like to know if anyone has installed these on their Gtr r33 and their thoughts on this?

Wanting to use this on the street and track...

Thanks.

Edited by CU's GTR
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CU's GTR Contributor

CU's GTR

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The fuel will be premium fuel (98). Boost level is unsure of at the moment. If possible 1.5 bar. I've looked through forums but most talk about kw at the wheels. Not to concerned on that. I expect to produce somewhere between 300-350 kw at all wheels. Current set up is producing 240kw at the wheels.

I just want to ensure the right turbo is use for and not too much lag. If full boost is around 3500rpms this would be fine.

baicai Community Regular

baicai

Posted
Posted

On stock engine and cams, -5 max spools at around 5000 rpm, with bigger intercooler, dumps etc max spool at 4500 rpm, unsure about cams(depends which one). I think it would be hard to get max spool at 3500 rpm with -5 on rb26, maybe able to bring it down to 4000 rpm if you get hard pipes everything and bigger exhaust like piggaz said.

baicai Community Regular

baicai

Posted
Posted

The fuel will be premium fuel (98). Boost level is unsure of at the moment. If possible 1.5 bar. I've looked through forums but most talk about kw at the wheels. Not to concerned on that. I expect to produce somewhere between 300-350 kw at all wheels. Current set up is producing 240kw at the wheels.

I just want to ensure the right turbo is use for and not too much lag. If full boost is around 3500rpms this would be fine.

For 300-350 kw atw better off going with -9 and e85, it will be less laggy than -5. With -5 you will eventually need to go to 400kw to make sense.
r32-25t Grand Master

r32-25t

Posted
Posted

Your never going to see full boost at 3500 with -5s it doesn't matter what you do

To get the best out of them tho

-Big exhaust and dumps (twin 3in into 3.5 minimum)

-Cam gears (no cams they send you backwards)

-Bigger and better intercooler (not an eBay Chinese special)

-E85 (makes a huge difference)

*increase your capacity (stroker or etc)

*vcam or the otomoto veriable cam system

The ones with the - should be on your list no matter what the * are if you can afford it, but a car with the entire list would be a weapon

  • Like 1
r32-25t Grand Master

r32-25t

Posted
Posted

For 300-350 kw atw better off going with -9 and e85, it will be less laggy than -5. With -5 you will eventually need to go to 400kw to make sense.

but this is a better idea, my car with the stock engine and -7s makes 348kw on e85 and has fantastic response
  • Like 1
CU's GTR Contributor

CU's GTR

Posted
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R32-25t, my concern with e85 is the availability of petrol stations around. Are you from melb and if so have you found it difficult for filling up for weekend drives?

Originally I opted for the -7, from what you have mentioned may relook at the -7's.

r32-25t Grand Master

r32-25t

Posted
Posted

Looking at the specs on the intercooler on the GTR R33's is rated up to 450kw? Would you still change them?

ive still got the standard one in mine but we have seen proven gains right through the rev range from changing them

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