Rb20 With Gt3040r

[Waldo]

hey guys just wondeing wat you think about sticking a Garrett GT3040R on a Rb20 with all supporting mods including tomei poncams, how do you think it would go? and a rough power estimate and rpm when it hits full boost.

[R31Nismoid]

same as i said last time this was asked, too laggy.

over 4500rpm before you'll see anything resembling boost on the boost gauge

[BHDave]

With a .63 rear and cams i reckon you'd see decent boost around 4, maybe a touch earlier with a gt30. Should make 220rwkw or a bit more.

Bigger exhaust housing will mean more lag and more power.

[Waldo]

hmm i was reading that someone got 254rwkw outta his rb20 with a gt3071 that might seem the go.

[gt-t_r34]

whats a gt-rs (hks) like on a rb20 on lag and over all power?

[carl h]

last time i dynoed my car it put down 288rwkw at 17psi but due to a massive air leak i was getting full boost at nearly 6k.

the car is a s14 with a rb20det swapped in with cams and injectors with a gt30r with a .63 ar turbine housing.

since ive fixed the air leak full boost now comes on round 4.5k instead of 5.5k, but i think my cams are a hair off so im gonna degree them to tomei's spec and see how it feels.

all i can say is 17psi on a 30r is forking rediculous.

[Waldo]

hmm i never relaly considered the gt30r on an rb20det, i probably have the same mods as you (besides gt30r) i have tomei cams aswell. 288rwkw is damn impressive, atm im pullin 175rwkw with my high flowed turbo and its only running 12psi, dont think there is much left in it even if i run 18psi. so im looking to upgrade to a turbo that hits full boost by 4500rpm and can pump out 250rwkw.

[Waldo]

hey mate with the gt30 you bought did you get an external gated version or did you buy the custom made internall gate. 63 housing from horsepowerinabox.com

[carl h]

using the old school hks cast manifold with external gate.