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RB20 Turbo selection (twinscroll housing advice) Hey all, To start, this is not going to be another "i just bought my mates R32 and it had stock turbo can you plz reccomend an ebay turbo for 300kw maxx plz thanks". I started this topic because i couldn't find anyone or anything on this forum close to what i want even after searching and reading the whole "RB20 turbo upgrade" thread. The basic info/Supporting mods > Completely standard RB20DET Silvertop (with the possibility of doing valve springs) > NIStune with flexfuel setup > ID1000's > 3" straight through exhaust > 45mm divided turbosmart hypergate > RB26 inlet manifold including ITB's > Hypertune FMIC > Gibson Motorsport GTS-R T3 twinscroll exhaust manifold This is in an S15 that will be my (secondary) daily and 90% drift 10% circuit car. My goal is to make a minimum of 230ish kw on 98 octane fuel, while keeping everything as responsive as possible. Yes i know that responsive and RB20 don't belong in the same sentence and i know that it's never going to happen, but anyway. There is plenty of results all over the net for highflows/GT2871/TD06 in 18 and 20G formats, but these are all using either the stock manifold or various brands of high/low mount open T3 manifolds and standard intake piping with generic intercoolers and long piping. Basically nobody as far as i can tell has ever gone to the lengths that i have to give the RB20 as much of a fighting chance at making some decent power as early as possible. So my question is what turbo setup should i use. Keeping note that any turbo i will run will have a twinscroll manifold and twinscroll rear housing to try and keep as much response as possible. I can use something like a GTX2860/63/67/71 or bump up a frame size to a GTX3067 (Note: 67 no 76). Originally i had canned the GT28 series idea because i was under the impression that there wasn't any twinscroll T3 housings available for GT28's so i had basically accepted that i was going to have to run a GT30. But i found that ATP have this housing available that is exactly what i need. So now knowing that i am back to the drawing board to try and decide what best suits my application. Things of note, 220-230kw minimum on 98 octane would be ideal, but i will be running E85 and a 45mm turbosmart hypergate off the exhaust manifold and i am happy to run big boost (20-25psi) on ethanol to make some decent numbers. Hopefully the 45mm gate should relieve some pressure on the turbo if i decide to go with a GT28 based setup. GTX2860/63/67 with twinscroll T3 .82 A/R housing or GTX3067 with twinscroll .83 A/R housing. Hopefully someone like Lithium/disco/darren can chime in and give me some insight into roughly what power these turbos are capable of on an RB20 that has been given every chance haha. Thanks (INB4 why the fark is some idiot wasting his time and money on an RB20)
Genuine MFS (billet) 7-blade hx35 Holset unit with ultra rare 10cm twinscroll t3 housing modded to extermal gate with 3-inch v-band flange welded on. AUD750 Delivered Payment via paypal Details via PM.
project cancelled need this gone Delivery: 5 days by EMS RB25/6 same material as seen on FULLARACE manifolds (SUS304 SCH10, 3mm wall thickness. Yet very lightweight, under 9kg) Braced head flange for more strength. Flanges are 15mm thickness, T3 twinscroll turbo flange. 44mm TIAL wastegate flange Price: AUD950 Delivered to your door Pay via paypal PM me for details Open to reasonable offers