Old Geezer

iTrader: (3)

" but I got water meth my iats are around 95-105 under boost".

Spraying the alky on the IAT sensor?

n20z28

iTrader: (3)

98 pcm limited to 210kpa (2bar) ... i may Repin and buy 99 pcm if I just can't get done on 15psi...

n20z28

iTrader: (3)

Its about 3 inch away

Forcefed86

iTrader: (4)

Ah gotcha, though you can fudge it a bit usually. I ran 18lbs on a 2 bar map for years. Also ran 20lbs on a MAF setup that was maxed out at 12lbs. You’ll max out the map enrichment but if you go a tad rich prior to maxing it out and watch the AFR/timing you should be fine up to a point. I don’t think your goals are unreasonable. Shouldn’t need to swap ECU’s IMO.

Some will disagree, but IMO Spraying the IAT sensor with meth gives you false cool readings. I wouldn’t tune by that number. Better off spraying down stream of the sensor and tuning your actual intake temps.

atomic 6

Valvesprings, and/or Pushrods.

We had a "low power" condition one time, and found all the pushrods bent, that was with us trying to get away with stock pushrods......on aftermarket springs and boost.

Didn't work.

5w20

iTrader: (21)

valvesprings and/or turbo's exhaust housing size

redtan

iTrader: (5)

Tiny engine, tiny heads, no intercooler.

Be glad you can put down that much power as is.

5w20

iTrader: (21)

Engine size is irrelevant.

stock48

iTrader: (17)

Engine size is relevant when you are talking low boost like that. A 4.8 will make as much or more power than anything else but it's going to take higher psi and pressure ratio to get it done.

TurboTerry87gn

My 4.8 made 620 @ 15 psi through a loose converter and th400 on a stock cam. Springs were stock until I hit 25-26 psi then I had valve float. My manifold temps were 95 degrees but I have a huge intercooler, also I built my stainless headers too. Your timing is low compared to mine but if thats what your motor likes on the current combo no reason to pop a motor to try to achieve 600 at 15 psi.

Sarg

iTrader: (6)

Even a cheap intercooler will be better than nothing at all unless it is to y and creates a monster restriction. Throw an intercooler on it and crank the boost slightly.

dans94z28

iTrader: (2)

your goals are reachable. especially through a m6. change springs and add a intercooler and run it again. with 11.5 lbs and straight pump 93 my 4.8 made 500 on the nose through a th400 unlocked converter and a s60 rear on a mustang dyno hazing the worn out hoosiers. again your goals are pretty easy and with meth 2 more degrees of timing should be safe.

SM105K

iTrader: (3)

My 4.8 made 603 hp and 527 tq on 13 psi with the APS TT kit. I do have worked heads, srings, push rods, E85, and an intercooler going through a glide. Timing ramps up from 13 to 15 degrees. I also dyno'd it Friday, where it was 108 here in Phoenix. IAT's never got over 114 degrees.