Sorry Duane:

Can you tell us the dyno improvement with regular and zero clearance turbo's in a stage 4?

 

This is what I heard regarding tires on the track...

Alex/ S Car Go Racing: Hoosier
Fredttx50/ EVO GT4: 19" street brand???
sharkster/ Imagine Auto & Kevin: DOT Pilot sport cups
Budman/ PES-EVOMS: DOT Pilot sport cups
Hamann7/ Protomotive: DOT Pilot sport cups
Cargraphics: DOT Pilot sport cups
By Design: DOT Pilot sport cups
Axis: Street brand???
Hartman: Street brand???
So it appears that the main contenders were all on the same tire. Looks like the Hoosiers were the only race tire out there..fyi

 

CC - zero clearance and 4GT turbos are two completely different approaches to get more HP.
The Zero clearance is Kevin's design and uses a K16/K24 hybrid then coats the inside such as to reduce clearance and thus imprve spool time and efficiency....
The 4GT turbos last I checked use a garrett ball bearing impeller in a custom K24 housing.

 

The zero clearance are not just a bolt on application. If you do not do any tuning your AFR's can go as high 14.5 which is lethal. I think Sharkster is running the Stage 4 GT software but not 100% positive.

 

Your all set right !!! Enjoy... You lucky bastard!!

 

Sharky actually has new software for these turbos I believe - different from 4GT

 

Why can't someone get the stage 4 GT and then get the inside coated to reduce clearance and then have the best of both worlds?

 

Exactly what I am thinking Sticky! I think the big factor is that if you do that, you probably will have too much power and will have to go inside the engine.

 

you will need conrods for sure!!

 

Got some news Sharkster won the braking contest.
By design got second with PCCB

 

I bet if Sharkey wins the quarter mile he has a shot at winning the whole thing.

 

Duane:

I would love to see some numbers and testing methodology. I would be shocked if the cars on the same tires differed by more than a few feet (driver variability in timing and pressure applicaiton in the braking zone). The proper way to test this to avoid that is to look at negative g's.

 

Duane - what you think of the Le Mans now
How did Fred's car do on braking??

 

So, you mean, Stephen's hat won?

 

can we get stopping times and distances please...I am wondering if Fred did not do so well due to the fact he only has the front Brembo kit or because he has street 19" tires...