mattipuh

thnks fred27, smooth driving is the target as it usually results in good lap times.
setup is as written above, or what did you have in mind?

mattipuh

Frenchtoast - fuchs should be original 15'' 7J et 23 (havent checked yet ). thanks for the crack hint.
I thought they're quite strong wheels... But old gets weak at some point. Like the style also.
I will propably sell these wheels if decide to change wheel setup. we'll see...

mattipuh

198 hp..
hot day.. maybe good head work would do the next gains.





198hp and increments

porscharu

So what scaling did you use and correction factor? I'm always concerned when the lines don't cross at 5,250 rpm. Just curious.

mattipuh

Dont know. Guessing theres no correction done for air temp / humidity etc, they just measure what it gives.

Equations: Dyno Correction Factor and Relative Horsepower https://wahiduddin.net/calc/cf.htm

we use Nm for torque in EU (Newton meters) so that 5252 rule applies only for lbft-figures

porscharu

I knew it had to be something simple. Sir Issac Newton strikes again! Great driving skills by the way.

mattipuh

Sir Porscharu, thanks! Slowly getting good feel with the car. Trying to get more balance with understeer issues in slow corners with the car.

Per vers

Hello Mattipuh and porscharu

The DYNOmite Dyno program uses: Pres. Temp. Humid. for calibration.

Regards Per

mattipuh

Don't know if that was corrected already or not..

mattipuh

Got good deal on raptor SuperCharger.
Recommendations - lower current 11.5:1 compression and run with mild boost (2-4psi) and E85, or put Turbo pistons (8:1) and run full boost?

I wouldn't need much extra hp so lower compression and alc. sounds interesting. And higher boost also brings heat issues in equation.
We have wössner forged pistons and forged turbo rods. Current engine should manage 300hp. Any equations to calculate dynamic compression with camshafts are welcome. We have quite hot cam in car which I think should help in compression problem.

btw is there benefit in using electronic boost controller? could be nice to have different maps for alc. and gasoline.. and maybe use different boost aswell..

V2Rocket

What is your HP goal?
2-4PSI on 11.5 CR with E85 should be fine.
Don't know if an EBC works on a centrifugal supercharger since it's a fixed drive ratio.
You can set your computer up to change fuel tunes at the flick of an actual switch.

mattipuh

thought of putting slightly higher head gasket and use E85 - might reduce compression to region of 10.5:1 or 11:1 depending on gasket. 220hp or 270hp. 220hp should be doable with 2psi and 270hp with 4psi.

V2Rocket

Rogue_Ant was able to get away with 18psi on stock 9.5:1 pistons, and blown944 ran 25+ on a near 11:1 engine for some time too.

I'd think as long as your AFR is spot on you should be fine at very low boost and high CR for that extra little bit of zing. Not to mention...the way the boost comes on with a centrifugal supercharger you won't have much boost/extra cylinder pressure at peak torque RPM which is where knock tends to happen the most. Boost comes on at higher RPM where knock is less of a problem.

mattipuh

Spencer, what AFR do you recommend for boost? We're running now 12 on WOT with tatech engine management.

V2Rocket

You'd be better asking those guys I mentioned above for specific tuning advice!