What Turbos Are You Running On Your Rb25?

[53XYN]

Hi guys...just wondering what sort of turbos are most running with RB25's ? as mine at the moment is already out of puff at 8000rpm currently its a GT25/30 hybrid setup thanks to MTC turbos , looking into a VG30 guise turbo with larger internal and external housings or even a GT 45/60? currently car mkes in between 245rwkw-289ish on 1 bar boost any advice would be appricated

Aim isnt daily driveablity more just outright touqe as long as it hits 300kw im happy

P.S im not worried about lag.. also i would like to keep it in stock mount position

cheers

Edited February 18, 2008 by 53XYN

[Bunta]

i used a Garrett GT3067R with the .84 rear housing, fitted down low and made 303rwkw at 18psi , full boost by just over 4000rpm too

[Devils_Advocate21]

vish vish vish, im sure either gt30xx being the 3076 or hks version 3037 (500 ps turbo's) will suffice, will get ya close, but i guess you cant go past the gt3040 varient as im sure it will get your mark and more id go 3040(600 ps) for your car, But gees havent you blown it up yet? last time i heard you had "knocking" with the power, then before that bent valve guide, just build the engine then you'll be happy, atleast for a little while, stock cams stock head stock everything, somethings gotta give somewhere.

[53XYN]

vish vish vish, im sure either gt30xx being the 3076 or hks version 3037 (500 ps turbo's) will suffice, will get ya close, but i guess you cant go past the gt3040 varient as im sure it will get your mark and more id go 3040(600 ps) for your car, But gees havent you blown it up yet? last time i heard you had "knocking" with the power, then before that bent valve guide, just build the engine then you'll be happy, atleast for a little while, stock cams stock head stock everything, somethings gotta give somewhere.

Adam adam adam hehe how are ya mate ! yeah its getting the rebuild done as we speak been there over a week already hopefully pick up on this friday general rebuild with forged pistons and a few small bits and pcs (warranty funded) ... now looking for a better turbo so i can push it beyond 300 mark

Chai sometime this week ?

[dano4127]

go GT3540 i dont reckon they are "that" laggy on a 25 and will pack a huge punch especially now you got the built motor to back it up with

did you build the neo or go to an R33 Rb25?

[53XYN]

go GT3540 i dont reckon they are "that" laggy on a 25 and will pack a huge punch especially now you got the built motor to back it up with

did you build the neo or go to an R33 Rb25?

neo motor just a lil over 5 grand for the bill warranty footed out 3500 for it rest i had to fork out due to forged pistons i wouldnt mind the GT3540.. what power do they hold comfortably ?

[dano4127]

well it should get it to chirp second....

[Devils_Advocate21]

gt3540 700ps roughly so around 400 + rwkws or there abouts anyway being a larger base turbo you may have hard luck trying to fit it on the stock manifold, for starters your pushing shit uphill running more than 300 on the stocko manifold anyway vish best to go aftermarket save the hassel and ultimately external wastegate is the best option as well, what you want it for dyno queen or you want to drive it, gt3040 is the best bet and will generally see the 350 rwkw mark with ease.

But that said you have so many limiting factors here, one stock manifold, 2. is the stock 248deg cams and yes you have stock head no port no polish only upgraded valve springs. so many improvements could be gained from doing something to the head that way not so much money on the turbo and that said more response to be held. easier driveability etc etc.

And here is an idea piss that auto crap off and replace it with a manual, i dont know the threshholds of the autos on the 34 gtt but hey we will find out

Welcome to reality of expense in the modding world vish. Best bet is do a search throughout the FI area you may gain a better response aswell or post up in there and they shall help you.

As for chai, hmmmmm friday week maybe.

Cheers

A

[Devils_Advocate21]

Oops i forgot to mention, Useable boost, the bigger you go with the less work you do the less play you have. All well and good having a giant turbo 3540 area + on a forged bottom end, but if you haven't got the necessary other bits the useable area or full boost plus maybe 2300 rpm of play, Hence my recommendation on the smaller gt30xx series turbos being 40's 76's or 37's Hope that helps vish

Cheers

[Squishy]

Hey I'm running a Garrett GT3071R and the gate opens at about 4000rpm for full boost

It's much fun!

[EastCoastCustoms]

vish vish vish

if your still comin to dyno day on sunday mate, come hit me upand will more than happily have a sit down with you to discuss some options for u mate

[666DAN]

Prepare to be pwned Vish, not outright power but wicked awesome performance from the slusher

[53XYN]

Thanks Tiff your car is sex on wheels glad its yellow hehe your cars the beasty version of mine .. mines just a pretty trailer queen lol

Ben im comming on monday to see how far off or better the reading is of your hired dyno compared to godzilla's dynodynamics should be a good day out i'll hit u up on sunday

Dan ma man dont worry im still too slow

[Bunta]

Hey I'm running a Garrett GT3071R and the gate opens at about 4000rpm for full boost

It's much fun!

What peak power does it make? I was close to running one of these on my car

[Strik3r]

Noel's running a GT3540.. definately good for over 400rwkw. Your definately going to need cams though. Why do you want to keep the stock low mount ?

[Bunta]

Noel's running a GT3540.. definately good for over 400rwkw. Your definately going to need cams though. Why do you want to keep the stock low mount ?

because when you open the bonnet it looks fairly inconspicuous, my old car was making 300rwkw but to look at the engine bay was nothing special

[dano4127]

take off your skirt vish - high mount that shit!

[Bunta]

yeah Vish! throw away money!

[FineLine]

the 30/40 unless you are doing head mods and cams etc, Mine has extensive mods in this area and i see full boost by 4100 rpm, plenty of playroom to 8500 rpm.

If you are going lowmount I reckon you should at least look at an aftermarket manifold as the stocker becomes a hindrance once you start making up around the high 200 kw's atw's.

[Col-GTSX]

yeah Vish! throw away money!

He has heaps, he owns and R34 and an AUDI...