What Turbo?

[tm_r33]

hey all, as some of the tassy boys will know, im building up my hybrid 25/30DET as we speak. Now i am stumped as to what turbo to use. i am aiming for 300+rwkw and the car needs to be streetable. it prob wont be my every day car but will be driven on the road often.

so a big laggy sucker isnt really ideal for me but in saying that i dont want a turbo thats too small and has no punch.

Responsivness is prefered but would like to have a bit of punch on boost.

The engine specs are as follows:

rb30 bottom end

knife edged stock crank

shot peened standard rods with arp bolts

wisco 20 thou over pistons

acl race series bearings all rond

ported and polished rb25det head

stock cam shafts

new/upgraded springs and valves etc

after market ecu (unsure what one yet)

bosch 040

500cc injectors

z32 afm

forward facing plenum (unsure what one yet)

fmic

3.5 inch turbo back exhaust or there abouts

Now i will be chucking the turbo on a high mount manifold with an external gate and hope to run about 18 psi.

would like to hear what turbo setup you guys recomend for me as my knowledge in turbo selection is lacking lol.

cheers james

[dangerman4]

gt3582r .82 ar 18psi by around 3.5k and around 350kws easily

[blitza]

HKS 3037 or TO4Z...

[PM-R33]

I dont think you can go wrong with anything around the GT35 range (either a GT3540 or something slightly smaller, GT3240), they will easily give you the power you want (rated around 600-700HP) and beyond and being a 3L this gives you the displacement to spool it up quickly.

Quick edit: Just noticed you have 500cc injectors, are they actually 500cc or nismo 555cc injectors? Either way, if you want to go much over 300, say 330ish, id probably recommend 740cc injectors just so you arent running the 500cc on such a high duty cycle.

Edited April 15, 2008 by PM-R33

[700HP-GTR33]

What size is your intake?

What size is your FMIC?

What is the displacement of the finished motor?

[PM-R33]

HKS 3037 or TO4Z...

.....bit of a big difference in turbo recommendations dont you think? Ones rated at 500HP the other at around 800HP....

Edited April 15, 2008 by PM-R33

[tm_r33]

Just noticed you have 500cc injectors, are they actually 500cc or nismo 555cc injectors? Either way, if you want to go much over 300, say 330ish, id probably recommend 740cc injectors just so you arent running the 500cc on such a high duty cycle.

point taken.. i will look into bigger ones

[tm_r33]

to4z... bit big maybe???

i assume displacement should be quite close to 3 liters??

600x300x75 we will say for now about fmic (havnt purchased yet)

exhaust and fmic will be 2 of last things i get as i want the piping to have clear path so will install motor etc first.

Edited April 15, 2008 by tm_r33

[PM-R33]

to4z... bit big maybe???

Yeah, dont bother, if you want a bit of response on the street on the setup, dont look at anything much past a 3540 IMO.

[tm_r33]

gt3582r .82 ar 18psi by around 3.5k and around 350kws easily

thats the power i am hoping for and boost by3.5 would be just fine

have u used this turbo personally?

any one with arguments against?

[Kaido_RR]

Yeah, dont bother, if you want a bit of response on the street on the setup, dont look at anything much past a 3540 IMO.

you do know that the T04Z comes in a range of rear housing.

you would easily make good power and responds with the 63T A/R0.61 on a 3L

[tm_r33]

you do know that the T04Z comes in a range of rear housing.

you would easily make good power and responds with the 63T A/R0.61 on a 3L

sorry this means not heaps to me... please elaborate in dummy language lol

[tm_r33]

what is the .61 actually a measurement of??

before this thread i was leaning toward a gt3540 and seems maybe still the way to go??

am i right inassuming .81 is a bit big if response is desired???

excuse my ignorance guys. never had to look into bigger than standard turbos before

[700HP-GTR33]

http://homepage.ntlworld.com/tbroom/Turbos.htm

You will need to match all your pipping for a good responsive turbo...

[tm_r33]

http://homepage.ntlworld.com/tbroom/Turbos.htm

You will need to match all your pipping for a good responsive turbo...

as in keep it all same diameter??

[NYTSKY]

+1 GT3582

[sven]

3540 .61 zorst housing dude.

[tm_r33]

+1 GT3582

3540 .61 zorst housing dude.

ok im guessing these are essentially the same turbo with different exhaust housing sizes???

one is .82 and one is .61???

will the .82 mean more lag?????

[NYTSKY]

Nope.One is a 3040 the other a 3540

3040 is about a 600hp turbo

3540 up to about 750hp depending on housings.

Wouldnt go smaller than an .82 on a RB30

[tm_r33]

Nope.One is a 3040 the other a 3540

3040 is about a 600hp turbo

3540 up to about 750hp depending on housings.

Wouldnt go smaller than an .82 on a RB30

so the one with the .61 is actually a gt3050 not a 3540???

and the one with .82 is the 3540???