anyone else done a 2 bar tune?
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
I guess my answer is yes and no. I have tuned a few supercharged Vette's with 1 bar sensors and boost referenced fuel pressure systems that have worked out OK. I have not used a two bar sensor. How have you made that system work? Does the two bars sensor cut the MAP voltage in half for any given pressure and then you modify your VE tables accordingly?
Thread Starter
Instructor
Joined: Jan 2003
Posts: 165
Likes: 0
From: Marianna FL
once i understood how the cars computer reads the 2bar sensor it was kinda easy, the new values are (0psi = 51kpa, 7psi = 75kpa, 14psi = 100kpa) so you condence the stock tune 50kpa is now what 100kpa was. 55kpa & up is boost tune. you just need big injectors.
Last edited by Guitarguy; Aug 5, 2010 at 04:58 PM.
Burning Brakes
Joined: Apr 1999
Posts: 758
Likes: 1
From: Cumming GA
JW
Burning Brakes
Joined: Jul 2006
Posts: 1,080
Likes: 2
From: Pittsburgh PA
Doing a 2 bar sensor on a 1 bar map loses alot of fuel control resolution. It may run ok but I"d like more resolution especially under boost.
Switch to a real 2-3 bar code like code 59. its modded syclone/typhoon code that can be set up for V8s fairly easily and runs well once you tweak it. High resolution table even for 3 bar sensor.
Its what I use on my twin turbo car.
EDIT, if this is a 87-91 car that is setup for speed density 730 ecm. If LT1, i am not familar with that.
Switch to a real 2-3 bar code like code 59. its modded syclone/typhoon code that can be set up for V8s fairly easily and runs well once you tweak it. High resolution table even for 3 bar sensor.
Its what I use on my twin turbo car.
EDIT, if this is a 87-91 car that is setup for speed density 730 ecm. If LT1, i am not familar with that.
Thread Starter
Instructor
Joined: Jan 2003
Posts: 165
Likes: 0
From: Marianna FL
Doing a 2 bar sensor on a 1 bar map loses alot of fuel control resolution. It may run ok but I"d like more resolution especially under boost.
Switch to a real 2-3 bar code like code 59. its modded syclone/typhoon code that can be set up for V8s fairly easily and runs well once you tweak it. High resolution table even for 3 bar sensor.
Its what I use on my twin turbo car.
EDIT, if this is a 87-91 car that is setup for speed density 730 ecm. If LT1, i am not familar with that.
Switch to a real 2-3 bar code like code 59. its modded syclone/typhoon code that can be set up for V8s fairly easily and runs well once you tweak it. High resolution table even for 3 bar sensor.
Its what I use on my twin turbo car.
EDIT, if this is a 87-91 car that is setup for speed density 730 ecm. If LT1, i am not familar with that.
Burning Brakes
Joined: Jul 2006
Posts: 1,080
Likes: 2
From: Pittsburgh PA
Yeah for LT1, then do what you are doing. I'm not familar with LT1 programming. The 3 bar is nice because the code I use with it has good resolution in the tables. It has alot of points of adjustment so 3 bar even on low boost setups still works well.
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