Hi guys,

How much more horsepower does running 103 octane with the GIAC/EVO Race program on a stage 4 setup?

According to the EVO website, the basic stage 4 kit makes 603 hp/603 lb ft torque. What should I expect the race gas to increase these numbers to?

Do you guys really notice the difference in the real world with race gas?

My goal is to start spanking new Z06s.

Thanks
George

 

I was told by Stephen at AI that it adds 40hp and 40 fptq

Jags

 

Jags - Did you install Stage 4 yet?

 

Yep the stage 4 is in with Kevins Stage 2 turbo's - very fast indeed. Look at my thread: holy **** batman.

Jag

 

I thought stage 4 used k24's, doesn't kevin use a modified k16 or did he modify the k24's?

 

How much boost should I expect with stage 4 with K24s?

I have a buddy with a stage 4 package and he is getting 1.2 bar at the hp peak and then tapers off to 1.0 bar at redline. Is this representative of stage 4?

I read on Jags other thread that he was hitting 1.4 bar peak and sustaining 1.2 and 1.3! That's 3 pounds more boost than my buddies car. Why the difference I wonder?

Thanks.

 

I sustain 1.2 bar with my GIAC Stage 2...

 

1.2 is about right. We start @ .9 bar for the 480 and upto 1.2 bar for 800hp.Its not all about boost.

Neil

 

1.2 with stock turbos?? Wow....
I am with Niel, we run 0.9BAR for level 1 and 2
Evan

 

[QUOTE]Originally posted by Dock (Atlanta)
I sustain 1.2 bar with my GIAC Stage 2... [/QUOTE

Sustained 1.2 bar on K16's are not going to last long.

 

I still think your Turbo is one of the best most gorgeous 996 Turbo ever...the AMG ETR...

 

Hi guys,

I just want to clarify your boost readings. When you are saying you sustain 1.2 bars of boost, what do you mean?

1. Your car peaks at 1.2 bar at say around 5,000 rpms and continues to hold 1.2 bar until the 6,700 rpm redline, or

2. You peak at 1.2 bar and then the boost tapers a little as you head towards redline

Thanks again.

 

It does seem like a lot Niel.....

Thank you very much!! Actually just did photos for a German Magazine it will be apearing in soon!! Here is a teaser

Evan

 

Peaking and sustaining are two different things. All turbos surge. The level 4 file is designed to accommodate the surge then as the RPM comes up the system pulls back down. This would be the same adjustment you would make for timing or fuel adjustment on standalone air temp compensation. Never believe any boost gauge on the dash. It is a light show from the factory unless it is half of what it should be. 99ths of a bar will not show 1 bar. 1.119 will not show 1.2 bar. The gauge tested against a calibrated mechanical boost gauge has been as much as 12% off on some of the cars we have tested. So just because the system says one thing doesn’t mean that is what you are getting.

If you really want to know put a mechanical gauge on it. If you are looking for real numbers, baseline the car. Then once the mods are completed redyno the car. Talk is cheap and the butt dyno just doesn’t count. Proof is in the dyno and 2-6K rpm times on a sprint in a specific gear compared to a base line test or another car. This is your best bench mark. Not someone else’s dyno or a single dyno representing every car. This is why I have posted tons of dynos because each car will baseline different and end up with a different end number. The percentage of the gain are consistent. Deviances often are an issue of many factors including but not limited to cam timing (even though it is set there still is a deviances even in setting them) gas, carbon build up in the chamber causing a slightly raised CR, air flow, temperatures and so on. HP is not what wins the drag race folks, HP sells cars, TQ wins races. The ability to haul the car out of the way and push the air comes from TQ, the ability to maintain that speed comes from HP. It is not HP pushing you in the seat, that is TQ.

 

Stephen,
Is there any benefits from removing the carbon build up in the chambers and if so whats the best additive for it.
I heard that after 15k or so the carbon build up is at its max and that the carbon build up is like running lower octane fuel in your motor.( it drains absorbes energy). Is this correct?