tuning assitance, 15gs, 550s, chrome ecu

**napkinthief** · 05-28-2014, 04:19 PM

Originally Posted by Jimvr4

Yes, It runs in closed loop at idle and cruising at vacuum. When you go into boost it goes into open loop pretty quickly. Good fuel economy depends on keeping out of boost.

If you want to make some 1/4 mile passes just make sure you tune well for WOT.

ok thats my goal, going to island raceway sunday i believe.

i should be able to really open her up there and get some nice logs.

ill post results ...

am i safe to say with my build i should hit 13.5? without 1.6s 60fts.. lol

**NOMIEZVR4** · 05-28-2014, 04:25 PM

I wouldn't be doing WOT pulls if my logs weren't showing proper data...IMO...especially if your car is stuttering, bogging, backfiring, etc...

When I initially got my adapter harness...the o2 wires were switched...that was the reason why my trims were stuck...

**napkinthief** · 05-28-2014, 04:28 PM

Originally Posted by napkinthief

ok thats my goal, going to island raceway sunday i believe.

i should be able to really open her up there and get some nice logs.

ill post results ...

am i safe to say with my build i should hit 13.5? without 1.6s 60fts.. lol

thats tec 15gs, 550cc inj, some weight reduced, 515ft/lb clutch, embc (truboost), downpipe, no cats

**napkinthief** · 05-28-2014, 04:30 PM

Originally Posted by NOMIEZVR4

I wouldn't be doing WOT pulls if my logs weren't showing proper data...IMO...especially if your car is stuttering, bogging, backfiring, etc...

When I initially got my adapter harness...the o2 wires were switched...that was the reason why my trims were stuck...

ya thats my point, im going to try to get rid of the sputter/bog at high rpm, anything closed loop the car sounds and feels great.. in closed loop, ive already roasted srt4 from a roll, but when i hit on WOT its flooding im pretty sure. trying to tune taht part down.

**Toni** · 05-28-2014, 04:34 PM

If you are doing any kind of racing, esp roasting someone you are not in closed loop, at least you shouldn't be

**napkinthief** · 05-29-2014, 09:36 AM

Originally Posted by Toni

If you are doing any kind of racing, esp roasting someone you are not in closed loop, at least you shouldn't be

are you insisting its possible im never getting to closed loop?

**Jimvr4** · 05-29-2014, 09:45 AM

He's saying our cars don't make power while in vacuum (closed loop). All the power is made in boost. If you have problems in WOT then you need to look for boost leaks. These cars run rich in boost by design. If they didn't then everyone would be blowing up motors due to detonation.

**napkinthief** · 05-31-2014, 10:17 AM

So i pressure tested, had a leak at the iac motor. the rear bolt that holds it in was missing.

i also regapped all the plugs to .042, checked the PTU, coils, wires.

it stopped bogging and flooding at high rpm...

i kind of want to re-flash the previous tune to see if it was just the iac leak, or the combination of both..

car is pulling very hard at 12 psi, but its very non-linear. feels like idle-2500 is a normal v6 (expected), 2500-4000 is almost like clutch is starting to slip, but at around 4200 it grabs hard all the way to redline. arent 15g supposed to spool faster? with the minor changes in the ve table (i think i took 2 away in 1400-1600 and 1 in 1200), im seeing afrs no lower than 10.9 and no higher than 11.5 in WOT. no knocks on 93 octane.