looking for around 450-500bhp which turbo would you use??

bear in mind you may want to have that little extra bhp in the future

 

GT 30


but thats only because what was in Lee's and fcuk me it rocked!

 

T4 for me.

 

see im undecided. i was going for a t38 but then i know its maxed out at around 460bhp and knowing me il want to have that litte more. so was thining about the t4 or the gt30 but not to sure which one is better for road use. the car will be used on track a little also.

 

Tough one imo, the RB T38 Sounds a good unit by all accounts,

I think a GT30 would be my choice though, having been in a few now they're a great turbo, never been in a T4 car still...

 

I'm going for a GT3071, Not chasing numbers but been told its good for 450bhp

 

When are people getting full boost with what turbo is the question i would be asking. Gives you an idea on what might suit you best imo.

 

im not chasing pub figures but i want a good 300-320rwkw. ie a good 400bhp atw in the future. so dont want to spend 1100 on a t38 and then have to spend another 1200 in a couple months.

 

surley thats al down to the overall engine spec?

 

Been in an Evo with one radders, very nice drive, good spool up too, obviously as you've stated, the 3076 will allow more top-end..

 

Yes it does come down to alot of things, still gives you a rough idea though.

My standard RS500 T4 had full boost at 4000-4100rpm and thats on a very basic engine spec.

 

I'm 'only' going for 2 bar on one, so will see what it makes

Either way, its going to be fucking quick,which is what im after

 

id think that the roller bearing one would come on boost a good 200rpm quicker at least.

 

Anything over 3k and my car starts to take off on my roller T4, I would like to back to back with a GT30 just for experimentaion purposes.

 

For the money, is 200rpm worth it?

I dont reckon I'd notice 200rpm, in any turbo ca tbh!

 

Euan dont you have all the restrictions removed tho??

 

if you have it then it would be.. would it not

 

there has been alot of work on my overall engine package and I have low back pressure in exh manifold and almost no back pressure in exhaust so Im sure this helps too.

You can buy my exact turbo from CR no so it doesnt have to be sent to AVA for modification.

 

The thing is most of the RB T4 users are running massive engine specs and with a Proper exhaust that is miles less restrictive.

Euan how much sooner does your car get full boost on the RB T4 compared to the normal one?

 

so in other words.. that turbo wont be hitting the same effect at the given rpm as yours.

 

I hope to have some graphs for my car by the end of the week so shold give you an idea of a rb T4 with normal exhaust.

 

what power you goig for neil?

 

GT30 wouldn't come in at that kind of rev would it Euan??

 

We did a back to back on my old normal T4 and the roller bearing was 400 rpm better I think.

 

400rpm seems alot better

 

you can see the difference on this graph at the bottom end.

Its a normal T4 against the roller bearing.

 

It makes a massive difference on the road.

 

Thats worth the Ł200 better imo.

 

DITTO..........

 

Just a shame my cars mapped for a standard version, thats what i will have to buy again as i am fooked if paying for mapping again. I was happy enough with it.

If i hadnt had it mapped already and wanted to spunk all my money on it again, i would go for the RB version.

 

i think il speak to mike/harvey

 

If like you've said, you'll probably be looking for more power in a few months time etc then i'd i'd take the T38 out of the equation tbh, that'll struggle to probably do 470-480 imo, it's between 2 imo..

 

i know but mike said the t4 was pointless for me if i cant keep the revs up.and my car will be used 90% on road.

 

RB T38 then for mainly road use imo... should give a nice 450- 460ish..

 

but then i want more and more

 

Just learn to change gear quicker

Seriously though I think the reason the T4 never bothered me was because i came from an Integra Type R so was used to having to work hard to keep the revs high.

 

You're hardwork.............

RB T4 then, final offer............

 

i know thats my problem.. im undecided till the last minute

 

Looking for around 480bhp.
My CR T4 was around 1600 pounds by the time i got the extra machining work done by them to help it hold power at higher revs.

 

hmmm