Geoff Raicer

iTrader: (7)

got 3 30R cars that will be tuned shortly, 40R is next

alpha

iTrader: (3)

Blasphemy! GT42R Geoff Off-topic. Are you going to the DSM/EVO Shootout? We're right outside Ohio so we should be there ... Eh. Some time

ZyBeR

iTrader: (2)

+ one Swede that's making some winter plans

TomTomTuning

iTrader: (2)

I just sent an email to Geoff about a Twin Scroll 30R kit.

Looking for a real responsive turbo kit to mate with my 2.3L
Jam stageII block + Jam stageI Head

Power goal of about 350-400awhp

I was going to go with this similar kit for my RB25 in my 240, but since i got the EVO, its getting all the love.

Geoff Raicer

iTrader: (7)

we will be at the evo vs sti shootout at englishtown on saturday the 25th! no ohio for full-race

edit: tom i emailed you back

Turbo Kyle

iTrader: (33)

Geoff Raicer

iTrader: (7)

small update, although slightly OT b/c its a honda. We dynoed a customer car this weekend who went from a 37R (singlescroll) to a 4094R (twinscroll). Below are his dyno plots showing the twinscroll 4094 vs GT37R. Also, we overlayed the twinscroll 4094 vs another car with the identical engine build and a GT35R for reference The solid line is the 4094R. All tests were done with the stock cams and stock head.



solid line = twinscroll GT4094R 1.06 A/R
dotted line = singlescroll GT37R .63 A/R




solid line = twinscroll GT4094R 1.06 A/R
dotted line = singlescroll GT35R .82 A/R

These tests were not back to back. They were done within a year and on the same engine. This is not a 100% accurate comparison, but you can certainly see a trend.

jbrown

iTrader: (17)

How is it that he made 640hp on a GT-35 and only 560 hp on a GT-37?

LilRico

iTrader: (21)

common, lets get a EVO test done... Please! I want to see those results bad....

High_PSI

iTrader: (50)

WOW

That 40R is just insane with a Twin scroll.

High_PSI

iTrader: (50)

I REALLY wana see a Twin Scroll 35R, like on a stock bottom end

High_PSI

iTrader: (50)

I REALLY wana see a Twin Scroll 35R, like on a stock bottom end

Ted B

iTrader: (6)

Why yes, we can see that a GT4094R with 1.06 TS kicks the crap out of just about anything else short of a 42R.

Geoff, can you give us an idea of boost pressures? Fuel? Were they the same in all tests? I ask because the GT35R with the larger hotside gave better power figures than the PT67R, which doesn't really happen when all else is equal (not that it really makes much difference here).

I find it amusing however that the GT4094R with big TS housing outspooled both of the others, then mopped the floor with them power-wise.

Jasil

iTrader: (22)

I'm impressed big time with the graph you posted Geoff, but the results from this EVO poster aren't as impressive to me. Here is the link to the thread too the post is on the last page. I asked him to post his full setup because I would expect a 85lb wheel to put down more than 685whp.

https://www.evolutionm.net/forums/sh...d.php?t=253110

Turbo Kyle

iTrader: (33)

Nasty...thanks Geoff... Keep it comming