I'm toying with the idea of upping the power on my cos a bit more. its currently making 365 and 390lbft at 1.8bar.
Spec is...
msd chip
stg 3 t3 (34 comp wheel) .48 ex housing
803's
light head work
rebuilt 20k ago at std comp

got the usual supporting mods aswell.

whats the next bits that would be required? still on std cams, so i guess they should go. which turbo and injectors would suit best?

ta

 

Why do I feel that someone will mention t38 and ab07?!

 

T38 and AB07 cam lol,or go the MSD 380 hp conversion mate.

 

You already have a lot of power and torque for 1.8bar boost on greens

Steve

 

lol, i was wondering if the ab07 would be mentioned... piston machining needed?

 

would i noticed the increase? or would the power be a bit more progressive and usable

it made very good figures, but Martin said its on the limit of whats the greens will do and was starting a lean off a bit at the top

 

AB07 fits straight in with no piston mods

No chance of feeling any difference with MSDs 380 conversion with what you already have.

If it was me i would just change the exhaust housing to a .55, AB07 inlet cam and 55lb injectors.

Steve

 

that as a pair of an inlet cam?

 

Just inlet

Steve

 

cool. any idea on power after that?

 

No idea, every set of rollers read different.

Just use the same one before and after changing.

Steve

 

iv gone t34.63 on grays with standard comp, feels as responsive as it did on t3 and greens but the power dont fall off at all. msd chip in mine

 

Fuck that, if your changing then why piss about putting a .55 on? If you want more power surely a T38 or whatever you fancy would be better? To me it just seems like a fair bit of expense for not that much gain.

 

What power and torque would you like?

 

would like to poke above 400 really. problem is, i've been doing the odd track day and 'ring trip with a 911 gt3, e92 m3 and r35 gtr. So my poor old cos has been seeming lacking.

i know its silly mixing with the bigger boys, but if it can be done why not?

'spose i ought to dump the tractor transmission, though.

 

To be honest the power i have now is not as usable all the time like it was with my T34.55.

The power held on better when i changed from a .48 upto the .55 i just didn't have the AB07 inlet cam which made a big change in the way the power holds on after peak power with my current set up over a standard inlet cam.

Yes my T38 is fast but for a all round driveable set up i would go back to the T34.55, AB07 inlet cam, ported head and 55lb injectors.

Steve

 

Buy my roller bearing t38 will get you 450+

 

so, in summary... Cam, diff ex housing or t38 and 55lbs?

 

I can assure you steve that if you did you would soon be swapping back to a bigger turbo
t34/t35 can make reasonable power but they are being worked far to hard to achieve this and have a very short short life expectancy at this level

 

I wont win any RR Days with a T34.55

All round i think it was a more usable car with the T34.55 but you can't beat the grunt it has now lol (well only more )

Steve

 

T38
Cam
Injectors
Remap

 

Bang on Aaron mate,that's where my money would go

 

ps Go for a RB T38 to spool quicker

 

Nothing wrong with a TT T38 journel bearing one

Steve

 

honestly just fit a gt30 and injectors job done, forget the t38 there old now had there day

if it was my money it would be modern bb turbo without question. the turbo will yield your biggest gains for the least ŁŁŁ

 

The GT's old aswel

 

Sack the t38 off and get a gt30

 

Its still better than some peoples T4s lol

Steve

 

i have a gt30 on mine with 500 bhp and a mate of mine had a 440ish mad set up on vipec with a t38 hes just fitted a hart inlet and a rb t38 ( he says the spool up is much better now ) and mark told him hes getting close to 500 now but i guess the turbo is right on its limit and he only runs 2 bar of boost i think wear mine runs 2.6 and i dont know what sort of torque he has havent put the too against each other yet but dans is a very fast car!