garrett GT25R turbo

[bigcarl]

i was browseing the various turbo sites on the internet the other day and came across the gt25 garrett turbo with internal wastegate, not hks. the specs are as follows: 440hp or 500hp turbine, .70 comp cover , 4inch bellmouth inlet and .86 exhaust. apparently bolts onto t28 or to3 flange. my question is , does anyone know of this turbo or is running one and if so whats the power and response like? ease of fitment? compared to high flow T03?

[Sydneykid]

Hi bigcarl, I have never seen a GT25R that makes 500 bhp. Even with the 0.86 A/R turbine housing they only make around 440 bhp. Pretty much the same as a ball bearing high flow RB25DET turbo. They normally come with a T28 flange (they are very popular on SR20's) but you could probably get them with a T3.

Hope that helps

[BOOSTD]

Good turbo, makes approx same power as the equiv HKS at less boost. So if your intake track is restrictive the HKS would be an advantage. And if it has good flow, go the garret.

HKS has better spool-up

Garret=less need for a head gasket

R u confused yet

[rb20-calais]

i have one, havnt put it on yet.

evan

[bigcarl]

can you let me know how you go once youve fitted it? thanx.

[Guest INASNT]

if u want big power say over 400hp go for a turbo with external wastegate, internal gate suxs at those type of hp.

[bigcarl]

tell that to boostd, hes getting over 400hp with a vg30 hybrid? i appreciate youre advice but my budget doesnt stretch to $ 5000. $2300 turbo , $1400 manifold, $750 external wastegate, new oil lines, pipeing and labour. then another $ 3000 to strengthen engine internals. also no power under 4000rpm!

[KamikazeR33]

but isnt that a good thing so u dont go all over the place in the wet?

also cops will think its a n/a until u hit boost

[Guest INASNT]

Originally posted by bigcarl

tell that to boostd, hes getting over 400hp with a vg30 hybrid? i appreciate youre advice but my budget doesnt stretch to $ 5000. $2300 turbo , $1400 manifold, $750 external wastegate, new oil lines, pipeing and labour. then another $ 3000 to strengthen engine internals. also no power under 4000rpm!

y not its only money!!

its get hard to control boost with internal gate at higher hp.

[BOOSTD]

My internal gate looses boost at high rpm, I've tried everything and it won't hold more than .9bar after 5000rpm. I could fix this with an external gate, but, why! I'm not interested in making more power!!! The tyres are just to damn expensive. (brand new 18 inch 275's lasted 6 weeks)

[bigcarl]

well im very impressed with how much power youre making with an internal wastegate. what power level were you at when you pulled 12.9 ? was that with 275s? have you been down the quarter with current power level?

[BOOSTD]

I did the 12.9 with 220rwkw and 255 17" tyres. My 2.2 60 footer shows the launch was crap. I have to get the rear end sorted. Haven't run with the new turbo as yet.

Managed to get the turbo to hold 1.2 bar @ 5000 rpm then trail off back to .9bar , was getting wheel spin in forth.....running semi slicks now to !