Prior to the TB is the ideal location from a flow/pressure standpoint as you dump all the pressure at the point of restriction (throttle body)... but putting it before the IC in a centrifugally supercharged application is ideal for minimizing heat load through the intercooler in off-boost conditions.
For a centrifugally blown car I would place it prior to the intercooler to minimize the cruising heat load-- that's more important to me. It still works just fine there. That's where I put mine when I added the intercooler.
For the water/air car I helped setup & tune the shop first put the bypass before the TB; I had them move it to before the IC. Moving the bypass made a ~15F difference in the intercooler water tank temperature during a steady freeway cruise as the intercooler was no longer having to cool all the bypassed air with the bypass before the intercooler.
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1969 Chevelle
Old setup: Procharged/intercooled/EFI 353 SBC, TKO, ATS/SPC/Global West suspension, C6 brakes & hydroboost.
In progress: LS2, 3.0 Whipple, T56 Magnum, torque arm & watts link, Wilwood Aero6/4 brakes, Mk60 ABS, Vaporworx, floater 9" rear, etc.
Last edited by Blown353; 02-07-2008 at 07:24 PM.
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