Ideal Twin Turbos For The Rb30?

[Sayajin]

I have definetly considered the single option, as well as I understand the benefits of it. Its just not a route I wish to go. Thanks for the info however!

I dont really care about high or low mount as I well be getting a custom manifold anyway. I do want to keep an internal wastegate however.

After doing research all of the turbos I had mentioned above would allow me to do this. However after looking at things, I have narrowed it down to either the GT-RS or the 2560 -10 for me. It appears they are damn near identical turbos, so it just comes down to which one I suppose.

-Sayajin

[r33_racer]

excellent 2c A...to4z ftw.

[Sayajin]

Okay. So I have decided. After doing a good bit of research on my goals and purposes for my car, I have narrowed it down to 3 choices.

One is the HKS GT-RS turbos.

The other two are equivalent versions of the GT-RS, just made by Garrett.

The 2560 -10 that we were discussing

The GT2871R -15 w/ .64 Housing AR (same housing size as GT-RS)

The above two turbos are exactly the same with the expection of the housing .86AR vs the .64 AR. All of the other specs are the same.

How much of a difference in lag vs power will the two housings have? I will gladly give a little power up for a lot faster spoolup.

Comments?

-Sayajin

[paulr33]

twin 0.86 rears is big

i would expect significantly more lag

[Sydneykid]

My vote is twin GT2871RS with the 0.60 compressor and 0.64 turbine. They each flow enough air for 400 bhp using 1.5 bar at 74% efficiency. You should be looking at 1 bar boost by 4,000 rpm, which leaves plenty of room for rpm changes on gearchanges etc.

The 1 bar at 4,00 rpm is based on 3 litre capacity with 9 to 1 compression ratio and 264 degree cams with around 9.5 mm lift and some decent porting on an RB26 cylinder head.

cheers