Kid-jdm-teggy

I need help with my power level predictions before I get a dyno tune because I have an 11 psi wg spring and a 15 psi spring and I want to know what power each spring will make at that pressure. Reason is if I put it on the 11 psi spring during the dyno session and I didnt reach my goal, I dont want to swap spring on a hot wg that is sitting under the log top mount manifold.

Heres what Im running,

Bottom end:

B18b1
81mm bore with Nippon racing 9.1:1 pistons
Eagle H beams
Acl bearings
ARP headstud

Head:

B16A
GSR cams
Dual valve springs on IN and EX
Port polished

Turbo:
Godspeed GT35r, .70 ar compressor, .63 ar exhaust
TurboXS FMIC

Fuel:
750cc tre injectors
Walbro 255
Adjustable FPR
Using pump gas 93

Anyone with similar setups or know anyone please let me know your power level on what psi with a 35r turbo. Im trying to reach 350-400whp, Im not trying to use a mbc because I have bad experiences with them. Thanks again

Schister66

I wouldnt bother with swapping wastegate springs - go with the 11psi spring and buy a good boost controller, not some knock-off junk. I ran a Hallman MBC for years without any issues at all.

Also, if you're running a knock-off wastegate (guessing beacuse of the eBay turbo) that could be the source of your boost control issues. Manifold design also plays a role

Dark_Teg

If you want to just run off the gate I would go with a 15 PSI spring. It would be much safer to run the 11 psi spring with a MBC.

Throwdown

iTrader: (2)

I second the 11lb spring.. and controller just set up a boost cut