Camaro XV

[Stielow]

We had a great day at Gingerman. We ran five 15 minute session with no issues. My last session it was 68 degrees and the engine ran 191 degree water and 241 degree oil temp. No power drop off due hot engine.

We were hitting 150 mph down the long straight. The car is a bit tricky to drive because it will blow the tires off at 100 mph. The shift light comes on over the raise on the long straight. I knew I was lighting the rear tire then I could see the rubber marks on the track. It will also get into a high speed tire shake if you at too greedy on the throttle.

This car is 1.5 seconds faster at Gingerman than a 2014 Z/28 that I ran there earlier this year. So on the question is Hellfire faster than a Z/28 the answer is yes.

Overlaying the speed traces from Red Devil and Mayhem you can see the delta acceleration and deceleration. It is shockingly fast in a straight line.

Some idiot on a new GT3 would not give me a point by. I'm was all over him in the sweepers and he still would not give a point by. I finally just blew by him on the straight then slammed the door in the braking zone.

All in all a great day. I have never had a first outing as good as this one. We just beat on the car all day.

Mark

[WSSix]

That's fantastic, Mark! Really glad to know the car is performing well for you. Good luck at SEMA.

[Sieg]

Nice! Once fine tuned this could get entertaining.

[BonzoHansen]

As impressive as ever. Nice job by you and your team.

[Rick D]

I guess when your on your 15th plus build you start to know what NOT to do as well as what TO do! Glad all went well Mark, can't wait to see how well you do in Vegas!!

[Che70velle]

Originally Posted by Sieg

Nice! Once fine tuned this could get entertaining.

THIS!!

[glassman]

Originally Posted by Stielow

Some idiot on a new GT3 would not give me a point by. I'm was all over him in the sweepers and he still would not give a point by. I finally just blew by him on the straight then slammed the door in the braking zone.

Mark

Love it.

[mikels]

Originally Posted by Stielow

We had a great day at Gingerman. We ran five 15 minute session with no issues. My last session it was 68 degrees and the engine ran 191 degree water and 241 degree oil temp. No power drop off due hot engine.

One primary focus of Hellfire was to control fluid temps and avoid (if possible) or at least reduce power loss during lapping sessions. When making an effective 1100+ HP worth of heat rejection from the engine alone, then adding intercooler requirements (not to mention engine oil, trans oil, diff oil, PS fluid) - there is an incredible amount of energy to dissipate!

Mark's spent considerable effort maximizing the cooler(s) size and airflow - as well as consideration for fluid flow in systems in order to stand a chance of keeping temps under control.

And all calculations were based on prior power numbers of Mayhem (before we 'found' a few extra HP's lying around.....)

Interesting to note - Hellfire's temps on track are LOWER than what we dyno'd the engine at (we always try to run real temps representative of environment engine will operate). So even at end of lapping session, engine was still delivering at least the amount of power we measured on dyno.

As a back up plan (still a few days prior SEMA.....), we've always been curious about E85 in a Thomson 427SC engine - primarily for cooling effect. Brian had another engine for his car ready to run (near duplicate of Hellfire's engine) so we ran it on 93 octane and E85. On gas - duplicated Hellfire's engine - as it should have. On E85 - 'found' a few more!

While we want E85 for cooling, looks like we can address Mark's issue of breaking tires loose "only" up to ~100 mph at same time.

Dave

[formula88]

Video #1

[formula88]

Video #2