blown 944

Very nice.

Looks like the smaller bearings are proving out well. You've done a great job with this build!!!

Duke

Indeed! I will remove the engine and check/replace the rod bearings during winter. So far everything the stroker engine is working flawlessly. My different issues during this season has been elsewhere.

Voith

One of the most brutal looking 951 ever, I wish I could see it in person

333pg333

Great going Gustaf! As mentioned previously, you really are getting more comfortable in the car and it's showing on the times. Considering it's a difficult looking track for our cars and you've had a few other issues, you should be congratulated especially since you're doing all your own work.

nick_968

Nice work, Duke

A.Wayne

Nice Dukey, that beemer looks good too, did it run as good as it looked .......

Duke

Thanks guys!

Regarding the clutch - short term I didn't want to do anything custom as that risks taking too much time between race events. Long term I don't like to go backwards so a superlight FW with motorsport clutch it is

Regarding the trigger - I've run several different setups at the front of the crank and the only good solution there is the Clewett. The other variants are crap. Stock like setup at the rear is superior in every way.

The BMW runs a RB26 engine with 680 rwhp, Porsche 6&4 piston calipers, BMW E39 rear suspension etc. Everything is custom It was his first shakedown in a long time so even with his power advantage he was close to 5 sec behind. But I'm sure it will evolve to something very quick.

refresh951

Be great to get some pics of those bearing Nice work Duke! Very impressive driving and a beautiful car!

333pg333

I thought with your 60-2 fly you wouldn't have to run the Clewett...assuming that to be a crank, not cam trigger?

Duke

The only way I can see this happening is if you only consider boost vs rpm. Would you instead measure acceleration of the car vs time the heavier FW would, if anything, be slower.

A heavier FW will slow down the acceleration and deacceleration rate of the engine. To help spool you need more exhaust energy, something a heavier FW cannot possible help with. The only way it could "help" spool is by slowing down the acceleration rate of engine which in turn will prolong the time window for the turbo to start building boost. Which in reality makes a slower car.

Duke

Yes I was talking about different setups I've tested in the past.
For cam trigger I'm using the stock setup. All 16v engines have 60-2 crank and a cam trigger setup from factory

333pg333

Right, you had me confused when you were talking about the Clewett. We had to modify it a little bit when we ran it on the last motor with the old 132 fly.

Raceboy

Flywheel stores energy, not creating it and the energy stored must come from somewhere. Perhaps engine would be my 1st guess?

Only situation where heavier flywheel is good thing is when you start moving with the car in gear, stored energy from idle speed help the engine to maintain its rotation from inertia.

If someone explains with facts how heavier flywheel is useful during acceleration and/or throttle response on any car (be it forced induction or NA), I would be grateful.

Duke

So I guess you think your car is faster going uphill or in a higher gear as well given it will give earlier onset of boost vs rpm

333pg333