Steve-6.1 Question

[Scoobum]

Steve...if I read Erics instructions.. .if I shut off number 4...it says I can go to manual fuel. Does that mean I can adjust low/high gear fuel like 5.7? Or just high gear?

http://www.turbotweak.com/turbotweakinstructions61.pdf

P.S. I'll fill you in later on why.

[Steve Wood]

Brad...if I read it correctly, to turn off closed loop fueling, you have to set 1,2,&3 to 99 or lower...then position four adds or subtracts from whatever Eric programmed as the default curve.

If you turn off pos 1 by setting it to 99 or lower, then it will run open loop to his programmed curve.  NOW, I have never done this on a 6.1 chip because I never trusted anyone to leave closed loop.

I am not sure what would happen if you turned off pos 1, set an A/F with pos 2, left pos 3 (mid boost) turn to 99 or lower....My guess is that pos 4 would be used to trim the curve for pos 2 and I don't know what would allow you to control pos 1.

Best suggestion is to ask Eric.

[Scoobum]

Steve, I have a 5.7 alky chip for 60's I think I'm gonna have him throw in it till I figure out what's going on. It looks like the WB he has is fukd. Eric looked at the file and thinks the same. Boost is out of control as well. Between KR and boost spiking I don't know how the headgaskets are still intact. Thanks for the help. I put the same question to Eric. I'll get back.

[Steve Wood]

Put some C-16 in the tank and most of these cheap wide bands will be dead on arrival.  If I recall correctly, most of the screwy problems I chased on William's car went away with a new wideband

[Scoobum]

Heard back from Eric. Turn off WB correction and only WOT fuel is available. I found a quick way of testing the WB sensor.

He picked up a new WB sensor...but I'm curious about the old one. Boost spiked to 31.6...so that needs to be addressed before going WOT.

[Steve Wood]

Okay, but which wideband correction?  You have pos 1,2,3, that can set AF's.  One of them is for mid range boost which is normally set off.  What happens if you turn off one of the two remaining positions?

[Forzfed]

Keep up the discussion, guys!  Good info to know.  Looking forward to playing with my TT chip next spring.

[Scoobum]

Steve...he wasn't specific. I gotta hit him up. Prolly doesn't know I'm a dumbass. Looking at it...it looks if you shut off 1, 2 and 3...that leaves 4 as your WOT manual setting. 8 gives you a manual setting as well. It's got me fukd up. I'll see what he says. I'm use to Eric spelling out everything in black and white in his instructions.

[good2win22]

6.1 is the bastard child of 5.7 and SD2. Keep it simple or go all in

[Steve Wood]

Nothing bastard about the 6.1.  It's the chip I tell people to use because it works very well.  Most people that go all in will slow down from what I have seen unless they have a pro helping them and then they don't go faster...they just get back to where they would be with the 6.1

[Steve Wood]

If you are spraying alky, or running E85, the finer points of tuning become blobs.  A/F is not particularly critical anymore and we are only tuning for a 400-800 rpm band after we launch anyway.

Tuning for steet drivability is much harder if we want to optimize it.

[Scoobum]

Eric replied. Shut off 1, 2 and 3...and adjust WOT with 4.

[Steve Wood]

got it!

I am going to start suggesting to only use the NTK sensor equipped wb's if there is ever a thought of using leaded race gas in the car

[Scoobum]

6.1 offers the advantage of not having to adjust fuel with temp/humidity changes. With 5.7 you best keep a close eye on temp/humidity on every run...and make your adjustment within minutes of making a pass. It's nothing for my car to drop 20 mv's on a 15 percent drop in humidity. Humidity trumps temperature every time.

If I could get unleaded race gas on the reserve I'd jump to 6.1...the race gas eats sensors alive. When I get the exhaust housing off my car in the spring I'll post a pic. The race gas has eaten it away horribly.

[Steve Wood]

As I recall, the aftermarket fuel management systems come with the NTK sensor because they stand up to lead and heat better and longer.