Sure you can! Get the restrictor and limit your boost to 15psi.

Sent from my SAMSUNG-SGH-I337 using Tapatalk

 

You can drive it however you like it, pretty sure no one boosts their car with the utmost intention of babying it. It's just the basis of putting extra strain on the car will eventually cause issues down the road, moreso if you're driving it like you stole it 24/7

 

Oh yeah. I'll be running pump gas. Thanks for calling that out.

 

So. How can I run 18-20 psi on pump gas?? What do I need to do to motor to be safe?

 

I think Richard should chime in here to advise us what to do running pump/e85. If he's advising not to run full boost on pump and stock motor (with the restrictor plate), but is doing so in the initial video post to get those numbers, it makes it difficult to know to what extreme we can push these kits to. Personally, I see no point in getting the c38-91 over the c38-81 if we can't run the max boost at the 81's limit

 

Whats the best way to get a hold of Richard? I've sent PM and email...

 

I contact him through email. Has it been a couple days, remember the time difference. I'll still go with 91, want capabilities of going higher or possibly switching to e85.

 

You can't run 18-20psi on pump gas if you want to be safe. Tuners recommends 12psi because it is a safe number business wise. I ran the GTX3076R at 17psi on 91oct for over a year daily without any problems. I constantly monitor knock volts to make sure they stay around 2volts. At 17psi, my ignition advance is 9. With 18psi-20psi I would guess the ignition advance would be around 6-8 to get knock volts < 2. You'll still see the occasional spike >2.0 but that is my threshold. With such a low ignition advance, it may cause high EGT's. There's a limit on how low of an ignition advance and boost you'll want to go before you start melting things. Best thing is put an EGT gauge to determine how hot those exhaust gases are. Plus you'll get to a point to where you will not make power by increasing boost and decreasing timing. Some stay at 15psi because you don't make any power running more boost because the engine is knock limited.

With E85, I have my boost set to 25psi and an ignition advance of 20 and the knock volts is still less thant 1.5volts throughout the rpm band. I make gobbs of power with the boost and ignition advance. The car is at a point where it is scary daily driving especially the rear wheel slipping all over the place. So I'm satisfied at 25psi, but I could probably could push it further up to 30psi. These stock S2000 motors are strong with the right tuning.

 

X2

 

Thanks for the info fellas. I'm just curious to find out if I can push this kits to its limits without blowing the motor. I'm running the SOS stage 2 at 13psi now on e85, however Richard anticipates that if I want to feel more of a difference over the SOS, then I should definitely run full boost on their kit. I'll try gather more info on the general forum and get a few more opinions