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niterydr · 04-06-2011

I ran twin SCM50's Dual ball bearing in the .63 a/r, if memory serves correct I was at full tilt around 5800, peak power from 6500-8500rpm.

Reducing the A/R doesn't help spool-up as much as you think it would. It does a good job of choking off the top end, its the size and pitch of the wheels that really kills spool, plus the fact that you have 1.5 liters feed each turbo. Look at what they typically spool at on a 2.0 and add to that.

What are the goals for the car? Being FWD, a little lag may help you if its a drag car. I know my car came on like a FREIGHT TRAIN when it hit, but then again I was running "all" boost, 33.5psi with the wastegates unplugged.

04-06-2011	#9
niterydr back in the saddle again 24 Hours Rally Champion! 3D Pacman white house edition Champion! 3D Racing - Track 2 Champion! ATV Winter Challenge Champion! Bloody Pingu Champion! WRX Racing 2 Champion! Tournaments Won: 5 Join Date: Oct 2003 Location: Elkhart Texas Drives: 2015 Ram Quad Cab Hemi, 1999 FRC Corvette, 93 Stealth Turbo Posts: 6,411	Re: Pte SCM61 Spool? I ran twin SCM50's Dual ball bearing in the .63 a/r, if memory serves correct I was at full tilt around 5800, peak power from 6500-8500rpm. Reducing the A/R doesn't help spool-up as much as you think it would. It does a good job of choking off the top end, its the size and pitch of the wheels that really kills spool, plus the fact that you have 1.5 liters feed each turbo. Look at what they typically spool at on a 2.0 and add to that. What are the goals for the car? Being FWD, a little lag may help you if its a drag car. I know my car came on like a FREIGHT TRAIN when it hit, but then again I was running "all" boost, 33.5psi with the wastegates unplugged.