would 10.5:1 compression be to much for a 03 6.0l running 9psi on a 122hh?

 

I dont think so. In my opinion 10:1 is a good CR for modified roots blowers. The Ls2 seems to work well with them too. Might want some meth to keep it safe

 

I am running 9.5psi right now on my Denali. I have a whipple blower and no meth. My engine is fine with that much boost. I've ran up to 12psi before I had an intercooler and other than high IAT's and a bad tune from one of the vendors here the engine has held up fine.

 

agreed...shouldn't be an issue...

 

just keep some meth handy lol

 

What kind of IAT are your maggie guys seeing around 10psi? Is the aftercooler not able to keep the temps down once you start to raise the boost? My A/A FMIC keeps my temps down perfectly. I wouldn't use meth unless it was absolutely nessecary. To me it seems like a band aid for an everyday car. I've got a 100% meth Aquamist kit on my Turbo M3 but I don't drive that everyday and it would be a pain to have to fill up gas and meth if I was on a road trip somewhere. I use my kit strictly for performance not to help my IAT's.

 

Meth only comes on when into boost, are you in boost all the time, no. I have mine set to come on ~5lbs. I am pretty quick at 5lbs., fast enough A washer tank of meth lasts me more than a month of everyday driving. 5 gallons a year. Meth has other properties. Keeps everything nice and clean

 

you beat me to saying the exact same thing

 

I understand that it can be setup to only come on under boost, but I am in boost a lot. I didn't put a blower on my truck to drive around at idle or close to idle.

What % of meth are you running? How many miles are you driving in a month, all that comes into play when figuring out how long a tank will last. I don't think meth is bad but its just a bandaid for high IAT not really a solution in my eyes. I would rather add meth to make more power not to coverup an underlying problem.

What does your setup make with out the meth and n20?

 

Meth does little to nothing for IAT's.
It's not a bandaide, it is a method of increasing octane, allowing more timing.
I can stay out of boost and roast my tires
I drive ~25 miles a day, sometimes a little more with taking the wife to work and most of it in city driving. If I was in boost like you say I'd be in jail today

Without nitrous I dyno'd soething like 575hp...i dont remember, see the graphs on page 2 if you click my sig.