Well I am putting an LS1 in my 86 iroc and wanted to do all the work to it since it is out of the car at the moment. I have looked all over and can't find much info on the vrx4, there is tons on the 3, but not the 4. I have talked to Ron through email and he recommended the vrx4 on a 112 for my application, and Im not doubting him, I would just like to get some input from some of the guys that are running it now on a full bolt on LS1. any dyno sheets to see the power and tq curve would be great. how much bottom end would I lose with the 4 over the 3? thanks in advance.

 

glad you posted i am planning on getting cam and tune from vengeance in a month or so and was probably going to go with the VRX4 but would like to see some track results.

 

Anyone?