EVO/IA Stage 4 was originally intended to run 1.1 to the red line.

Today, a lot of Stage 4’s and K-24’s w/EVO WG are running 1.2 to the red line and some like me Stage4+ are running with peak 1.3 bar from 3,600- 4,600 rpms on EVO IC's +RSS Plenum&B-TB+ triangle mergers K24 headers (997TT EVT590 on/EVOGT660 style).

Is a good idea to change to 5bar fpr with a Stage 4+?



Thanks!

 

I think when you come to that level, one should change to a real 5.0 FPR, and the fuel rails as well, I can only assume the injectors are already changed to bigger ones that work for the app.Of course the ecu needs to be tweaked to reflect those changes.

 

I never ran a 5 bar with my stage 4 car. I didn't have a plenum, TB, or IC's, but my car held 1.2 bar to redline and funs great AFR's. Since you are running those extra mods and they are pushing more air, you might need more fuel. I would talk to Stephen and get his input.

 

that is my

Thanks any way.

 

Guessing if you need fuel is not going to help. You need to have the AFRs checked and then go from there.

 

Thanks,

I will dyno the car soon to get the AFRs checked...

I appreciate your input Stephen.

Best

 

Any updates, Pierre?

 

Pierre, I am curious to see what kind of #'s your car puts down on a dyno too.