Which is the best turbo?
- Thread starter Thor
- Start date
bernieGTIR
New Member
I’m running a gt3071 from Owen developments which is not to laggy and I my r is running 443bhp. But I am running an external wastegate which helps spool up a bit apparently (not convinced myself but it sounds cool).It copes with track day madness ok and its boosting up just before 3k. give them a ring and ask for ian in technical for more help.
Someone was trying to explain that to me; the cams don't have quite the same effect as they would in a N/A car, but if they're set-up right they allow you to open the exhaust ports a little earlier which puts more exhaust through the turbine and thus spools the turbo earlier?
Makaveli_se7en
Member
Why is it people seem to think the only company that makes turbos is Garrett :doh: (yes as you know I work for the competition :lol
To quote a recent post I put on the modifiers site:
But to answer your question for quick spool I would be looking at a ball bearing cored turbo with a billet compressor wheel (try to find one thats been designed for low intertia rather than demanding duty cycle). Also ensure that the turbine stage swallowing capacity is match to the engine breathing lines on the compressor map, remembering to take into account the wastegated flow (to do this assume the flow in the wastegate is choked i.e. mach number is 1).
Another thing you may want to consider if you are also looking for a new exhaust manifold is to go for a twinscroll manifold with a divided turbine housing. Russ (Empty Pockets) and I have discussed this at length, I remain a little unconvinced about the benifits of twin scroll exhausts on 4 cylinder, but in theory they stop the exhaust pulses from interfering with each other.
If I were you I would be looking at Precision, Borg Warner and Scooby Clinic's billet variant of the GT30R
Dan is right about looking at the rest of the engine though, things like compression, ignition timing, intercooler pipe work and cams can all have a big influence on turbo lag.
To quote a recent post I put on the modifiers site:
Bosch and Toyota are also very likely to start making turbos in the not too distant future based on thenumber of patents they have filed in recent years in the area.
But to answer your question for quick spool I would be looking at a ball bearing cored turbo with a billet compressor wheel (try to find one thats been designed for low intertia rather than demanding duty cycle). Also ensure that the turbine stage swallowing capacity is match to the engine breathing lines on the compressor map, remembering to take into account the wastegated flow (to do this assume the flow in the wastegate is choked i.e. mach number is 1).
Another thing you may want to consider if you are also looking for a new exhaust manifold is to go for a twinscroll manifold with a divided turbine housing. Russ (Empty Pockets) and I have discussed this at length, I remain a little unconvinced about the benifits of twin scroll exhausts on 4 cylinder, but in theory they stop the exhaust pulses from interfering with each other.
If I were you I would be looking at Precision, Borg Warner and Scooby Clinic's billet variant of the GT30R
Dan is right about looking at the rest of the engine though, things like compression, ignition timing, intercooler pipe work and cams can all have a big influence on turbo lag.
Makaveli_se7en i couldn't have said it any better myself. The bias towards garrett turbo by R users is crazy. There are so many different variation to achieve your target of 500 bhp. Furthermore, although the gt3076r makes good power, the wheel design is completely mismatched. I know i will get flamed for this but I personally would never choose a hks turbo as it is simply a re-badged precision/ garrett turbo with a "unique" compressor housing. Its simply not worth the money.
My two cents.
My two cents.
Empty Pockets
New Member
Well i never.. i thought all they did was wear pillow cases on their heads and lynch people.
Makaveli_se7en
Member
Schwitzer who produced KKK turbos are now Borg Warner.
Also agreed that the 3076 is not the best matched turbo in world. In terms of a U/C match a 65mm diameter turbine wheel that flows about the same as the 60mm GT30 wheel would be a better option, but Garrett don't have anything that size. This is part of the cause of the gap in the Garrett line up, where they don't really have anything between 520 - 600bhp as the turbine wheel jump from 60mm to 68mm.
Also agreed that the 3076 is not the best matched turbo in world. In terms of a U/C match a 65mm diameter turbine wheel that flows about the same as the 60mm GT30 wheel would be a better option, but Garrett don't have anything that size. This is part of the cause of the gap in the Garrett line up, where they don't really have anything between 520 - 600bhp as the turbine wheel jump from 60mm to 68mm.