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Greddy T78 On Rb25det

Light

By Light,
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Lithium Grand Master

Lithium

Posted
Posted
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 Grand Master

STATUS

Posted
Posted

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.

STATUS Grand Master

STATUS

Posted
Posted
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 Grand Master

R31Nismoid

Posted
Posted

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 Proficient

Mr Kofi Ahmed

Posted
Posted
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 Grand Master

STATUS

Posted
Posted
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....

  • 8 months later...
Blue_GTR Enthusiast

Blue_GTR

Posted
Posted
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

STATUS Grand Master

STATUS

Posted
Posted
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 :P

Blue_GTR Enthusiast

Blue_GTR

Posted
Posted

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 Community Regular

archie01

Posted
Posted

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 Grand Master

STATUS

Posted
Posted
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.

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