Quote:
Originally Posted by 18psi
Efficiency IMHO. I actually applaud tuners that get every single horsepower out of a certain pressure range instead of just ramping up boost to the limit, throwing lots of fuel at it and then dealing with knock by retarding timing at peak boost. Less boost = less stress = more efficient (assuming the timing is not advanced so much that it is knocking)
Just my take on it.
*edit: of course this is assuming the tune is spot on and producing good power which in this case it clearly is.
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You hit nail on the head. I love to provide powerful and reliable tunes @ low boost first...then once I'm happy how the car runs on lower boost levels..we'll go ahead and turn it up.
My personal car is a fully built Evo..I have only been running it @ 29psi where it's ran 10.6 @ 138mph. I know the car is capable of much faster times at the same boost levels...so I wouldn't turn the boost up until I reach better numbers at the current boost level.
In the yellow Evo's case...I was honestly shocked how fast the MPH was. On the 22-23psi tune I was thinking a 112-114mph trap speed..especially given the 90+ degree night. The 117.96 trap tells me everything is working efficiently, the owner is extremely happy...I'm ok with turning the boost up at this point. BTW...I logged both passes via Evoscan...each run yielded 1 knock count in the middle of 1st gear...the rest was smooth as butter. This car is a daily driven mode of transportation..the owner like to punch it in the middle of the day when it's 100 degrees out...so I like to keep it safe.
Thanks for the compliments on this Evo...it's come a long way...before he brought it to us it ran a 14.4 @ 96mph.