What a difference the right presilencer makes...

NoDOHC · 04-19-2009, 07:05 AM

Generating pressure from the pump. I tried it with limited success (used a plate with a very small hole in it what the line bolts to the cat). The pump is not always intelligent about when it pumps air into the exhaust. I had to do something to the ACV as well (I don't remember what it was - too long ago).

I did get it to work pretty well in the end, but I had to put a helper spring on the actuator in order to get it to open at 3500 rpm.

04-19-2009, 07:05 AM	#19
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 18	Generating pressure from the pump. I tried it with limited success (used a plate with a very small hole in it what the line bolts to the cat). The pump is not always intelligent about when it pumps air into the exhaust. I had to do something to the ACV as well (I don't remember what it was - too long ago). I did get it to work pretty well in the end, but I had to put a helper spring on the actuator in order to get it to open at 3500 rpm. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)