" 603 awhp spiking to 37psi" and "running 10.5 to 1 cr" - what were you using for fuel please ? Not 93 PON surely.

 

Just a guess, but probably E85.

 

Possible, the issue is detonation and E85 is about as close to meth/eth as you can get at a public pump. Does need big injectors.

 

Almost certainly.

 

Josh, if you kept your car at 3300lbs...that is pretty good. We have several ag scales around the plant where I work, and I have forgotten my numbers now, but both are under 3300lbs...The roadster is heavier obviously...

 

Remember I started with an NA, manual trans coupe (3010) and shaved 70+lbs with my seats. The motor only added 50-80lbs. With my exhaust chopped off I'm probably right around 3000 lbs even.

 

Got it....both mine with autos, and I still have the exhausts to do....OK, back to the all mighty Benz thread...I liked the little car, but not for that money...I could have had a used AMG for that price. You need to see them in person.....

 

I agree, most are saying you can crawl into C63 territory very fast with options. I would (and are going to) just spend $10K less than the starting price, for a used E55 and call it a day lol.