Greddy T78 On Rb25det

[Light]

Hi mates

what do you think of a greddy t-78 33d on an rb25det? will it spool late? i have 270 cams.

need your help

[R31Nismoid]

Well it wont spool early... but then... what do you determine as "late" ?

5000rpm? 6000rpm?

[Light]

4500 is ok with me... but 6000 is late

at what rpm do u think it will spool?

Edited March 26, 2007 by Light

[Lithium]

4500 is ok with me... but 6000 is late

at what rpm do u think it will spool?

I'd imagine you'll probably be lucky to get much happening at 4500rpm with a T78, if what you mean by spool is "Making reasonable boost". The biggest turbo I could imagine getting much going on at those kind of revs would probably be something like a GT4088R, and that'd not be full boost...

[STATUS]

what is the number inside the exhaust housing? there are 3 sizes 14, 17 and 21cm housings and the 14 is actually very streetable.... the 21 is not. T78 is my favourite street/strip RB26 turbo when setup correctly.

[Light]

mine is 17

[Roy]

Stick with the Trust catalogue but go TD06SH-25G. Is 310-330rwkws enough?

[SimonR32]

gt3540r would be a better choice imo

[STATUS]

gt3540r would be a better choice imo

Nah good example is the MSR skyline, ran better numbers with the TD06SH-25G (10.30ish ) than it did with the GT3540r. If your tight for cash though the GT3540r is the best compromise though.

Its not a brand thing its an outcome thing. Like cats car RB26 i have driven plenty of rb26's with GT-RS's and 2860's but i dont like them i prefer the T517Z's but on SR20 for high end i will choose a HKS GT3037s over a T67 anyday and for response and mid power 280rwkw a TD06l2-20g over a GT2835.

[R31Nismoid]

But that comes down to personal preference sometimes on power deliver.

The 517's suck absolute kak compared to thier Garrett friends if you ask me.

Having been in a GTR that has 517's and then went to Garretts of very similar degree, the different was unmistakable.

The Garrets made a tad less power, but had more power everywhere, smoother delivery etc etc.

Light - what kind of duties is the car going to see?

[Mr Kofi Ahmed]

4500 is ok with me... but 6000 is late

at what rpm do u think it will spool?

I had a td06-25g with t78 wheels. On a built motor it came on at 3800rpm and went all the way to redline. Made 490rwhp at something like 1.5bar with a dodgy fcon tune. I sold the car to a SAU memeber, i'll point him towards this thread as he may or may not want people knowing anymore specs other then the above.

[STATUS]

But that comes down to personal preference sometimes on power deliver.

The 517's suck absolute kak compared to thier Garrett friends if you ask me.

Having been in a GTR that has 517's and then went to Garretts of very similar degree, the different was unmistakable.

The Garrets made a tad less power, but had more power everywhere, smoother delivery etc etc.

Light - what kind of duties is the car going to see?

8cm or 10cms? they are totaly differrent beasts i have just removed the 2860's and fitted the T517z 8cm and i have experienced exactly the opposite....

[Blue_GTR]

what is the number inside the exhaust housing? there are 3 sizes 14, 17 and 21cm housings and the 14 is actually very streetable.... the 21 is not. T78 is my favourite street/strip RB26 turbo when setup correctly.

Hi URAS, Is the T78-33D-14.0 very responsive on a GTR?? Compared to something like GT2530's? What boost do they start making good power?

Thanks

[DjeMz]

what if u get some cams?

gt2535 are good for 250rwkw

[STATUS]

Hi URAS, Is the T78-33D-14.0 very responsive on a GTR?? Compared to something like GT2530's? What boost do they start making good power?

Thanks

speak to rob and danz at creatd they have a 4 door r33 RB25 with a T78 kit on it and it makes over 400rwkw, it is also suprisingly more response than i imagined it is on full song before 5000 rpm and once on can be played with like a much smaller turbo. James V from D1 garage has a ZEIK power s13 with RB26 and T78 for drift and has much the same feedback as i experienced whilst driving the creatd R33.... all in before 5k and hold on till 9k

[RNS-11Z]

I had a t88-33d on my rb25, stock cams & head, was on full boost @ 5k. It was a 1.0 rear housing, awesome turbo, do it

[Blue_GTR]

Thanks for the advice URAS. Was just contemplating how they would compare to HKS 2530's. Do you think a T78 would be able to make more outright power/response than the twin 2530's? (With a built engine / similar boost levels?

[archie01]

Blue GTR

If your intended purpose for the car is circuit and you could only choose from 2530's or a T78 then definitely go the 2530's.

Even if the 2530's make 20-30rwkw less at the same boost level as a T78, because they are more responsive I'd say the car would still be quicker around a circuit.

I had a T78 on my gtr and the power delivery was like a light switch. Power hit hard from 4800-5000rpm which was way too late.

Swapped to a TO4z and it was more responsive down low with more power up high.

[STATUS]

Thanks for the advice URAS. Was just contemplating how they would compare to HKS 2530's. Do you think a T78 would be able to make more outright power/response than the twin 2530's? (With a built engine / similar boost levels?

top end yes, response no way sorry.

[Blue_GTR]

top end yes, response no way sorry.

I had a feeling that would be the case, thanks for your reply again URAS