Anyone have any factual info as to why 4 out of 6 evos in the OPEN TRACK CHALLENGE in CA blew up engines?

 

I know at least one suffered fuel starvation and upon running my Evo at the Glen this past weekend, I'd say that the ignition system is not up to snuff on a 20psi+ run. I was misfiring like crazy in some right hand turns and that was with a full tank of gas.

 

Just the whole way Mitsubishi made the car for america; making it run a california **** gas and then upping the boost does not create the desireable results.

 

make sure to put some race gas in the car before u track that bad boy. I tracked my car at T-Hill on 91 had not problems but then again it was not a hot day so who knows. But throwing some 100 will help things a bit when it comes to upping the boost

-Chris

 

Yea. When I was at Road America a few weeks ago, I put in some 100 octane on top of the 93 with slightly cranked boost, Didn't have any problems, but was running stock tires, suspension, alignment so I wasn't generating killer G's. I thought maybe there was oil starvation issues on modified cars, didn't know it was detonation issues that took em out.

 

Not all the issues were fuel starvation.

One car spun a bearing. I have not heard the root cause.

I am not sure of the others.

I would also like to know if anyone has heard the reason for the failures.

D

 

Could have to much cyl pressure.

Eric

 

Can someone elaborate on the fuel starvation problem? The SCC article made no sense on that subject.

 

Haven't read the SCC article, but generally fuel starvation occurs during sustained high g cornering when the fuel level falls below the level of the fuel pickup. The resulting drop in fuel pressure causes less fuel to be delivered at the injectors than what the ECU thinks it is delivering for a given airflow. The result is not enough fuel for the air in the cylinders and a lean condition. Lean condition = detonation = damaged rings, pistons, bearings or even a bent rod if the knock event is bad enough. That's why you shouldn't run less than a 1/2 tank of gas at the track. BTW, it's not just an EVO issue, as many cars suffer from the same problem. It just becomes more of a problem with forced induction due to the higher cylinder pressures involved.

 

AEM's?? and gggooooodddd maping! all the best!!

Lancer evo (4,5,6,7,8) is one of the diff. car for maping!