Originally Posted by chefrey

it would be much smarter to go the utec route to correct the fuel then with the regulator because every mod is going to have a different out come on every car as far as a/f goes. you will have much more control of the fine tuning at every load point(at every 250 rpm) instead of guessing at a fuel preasure that might work at on rpm range but not at another and is not instantly changeable. you will be stuck at one fuel setting even if it hits the target a/f at low rpm but becomes overyly rich/lean at high rpms with the regulator, but with the utec you can control it at indivdual points to get the best performance out of the whole rpm range.

the utec uses stock knock monitoring sytems which are pretty good but it is able to pull more timing then stock as an extra safe gaurd, if you dont want that added safety the utec is programable to act just as stock ecu would. it is up to the end user to pick the settings that will be used during the tuning and everyday driving after wards

for example some people running n/a will set the knock threshold to 3 counts instead of one. thus the utec does not pull any timing at all untill the knock count on a cycle reaches three, while some people let the utec pull timing right at one count of knock. it is all in the way the system is set up and the trust and communicion you have with the person tuning your car.

i just saw that you have an 07 in your previous post but the comment you make after wards about the z-tube and stillen intake throws me off. i thought the 07s have the duel intakes which require different tuning methods that arent finalized or available yet.

Originally Posted by manbeer

i'll start at 100 but i think i'm gonna shoot for 150 on stock timing with no tune except for possibly an adjustable FPR. that will be running 100+ octane though.