sanekit
1,500 RPM
haha! we have the same target. i'm targeting 200whp for my future bolt on project for my car as well. so i can surely tell you that the gearbox can handle it. i did some research and most website i found reference from says the autobox is rated for 26-28kgm torque on the safe side. u can push more up to 30% ish or so. more than that will require and full rebuild, custom end clutch, larger valve body and solenoid. get a big ATF cooler and install a fan on it. my gearbox is using atf cooler with fan setup. because of the size of autobox (mine u, 8L of ATF if u fully drain it), mech will suggest u to use atf cooler. if he say u dont need atf cooler, please find another workshop.The GSR autobox is rated for 26kgm? It would be roughly 255nm. Gsr is rated at 270nm on crank (by paper). In this case, it would reduce my gearbox lifespan drastically if i uprate my boost with the gsr autobox, am i correct? I’m looking to run stock for a few months first, then maybe uprate the boost pressure to 0.8 or 1.0 bar, but nothing more than 1.0. Would the autobox lifespan be moderate if i boost it daily on 0.8 bar? Also, if we’re looking at whp, I’m looking at 200 whp on auto tranny. Unsure if 200 whp would blow the box and require an autobox swap from turbo RVR or VR4 autobox.
My BOV is Apexi Twin Chamber Bov. I’ll be below 1.0 bar for sure, thus BOV is not really a necessity. Though, i want to change to the said BOV as i got it for free (japan halfcut) to have a feel of BOV. Again, 200whp. In this case, would i need additional of changing/adding wastegate? I somehow understood from forums that low boost/low power usage = bigger wastegate, while high boost/low power usage = smaller wastegate. Would i need an aftermarket wastegate? Do advise at your level best, and thanks alot man! Once my car done, let me get you a ride and go for a drink. Vr2turbo and rest as well, drinks on me if you would like to (no alcohol, tea or coffee only hahahaah)
minor head mods, larger valves and some good tuning can get u 200whp with less than 1bar boost on your stock td04. but it'll go out of breath quite fast. not that suitable if you're looking to play karak runs against those high speed contis. ahahaha.
as for wastegate, yes, get an external wastegate. you don't wanna go overboost and blow your engine. external wastegate is a good investment.
also, you're not using the side mounted stock gsr intercooler right? get a front mount intercooler. and if you have extra budget, install a good oil cooler, good twin core radiator as well.