What ECU do i have?

Mikel89us · October 3rd, 2011, 10:32 PM

I recently picked up at T-Bird ECU and harness, its from an 87 Turbo coupe, and i was wondering what it is. Im not sure how to figure out if its LA or LB or what number. It was an automatic trans car.

OHC230 · October 7th, 2011, 08:09 AM

It should have a sticker on it, near the plug, if not re-post.

Mikel89us · October 7th, 2011, 11:30 PM

it does, and it has what looks like a blue stamp that says LB13 or something like that

OHC230 · October 8th, 2011, 07:28 AM

OK, so it's an LB1, which is fine for a turbo application. What are you planning to do with it?

Mikel89us · October 8th, 2011, 09:06 AM

turbo on my mustang. What would be a safe compression ratio to run 6 psi?

OHC230 · October 9th, 2011, 12:55 PM

9.0:1 at 6 PSI with an intercooler should be OK for a cast piston, but I would suggest you run 91 or higher octane fuel if this is your plan.

If you are going to use forged pistons, you could get away with 10.5:1. I'm guessing that you are looking for more low speed torque in this engine, hence the high compression/low boost combo? If this is what you are after, then I suggest that you use the stock valve sizes in the head and PM me for some porting tips. What cam are you planning on using for this?

Mikel89us · October 9th, 2011, 09:40 PM

I have hyperutectics and about 10.3 to 1 right now

Mikel89us · October 9th, 2011, 09:44 PM

And yes im going for low speed torque, i have the stock cam in it, dont think i will change it right now. I have an external wastegate that is set at 6 psi anyway so i decided to keep high compression, due to the failure at power before with 6 psi

Mikel89us · October 9th, 2011, 09:45 PM

and i do have an intercooler too, front mount

October 3rd, 2011, 10:32 PM	#1
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	What ECU do i have? I recently picked up at T-Bird ECU and harness, its from an 87 Turbo coupe, and i was wondering what it is. Im not sure how to figure out if its LA or LB or what number. It was an automatic trans car. __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

October 7th, 2011, 08:09 AM	#2
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 879 iTrader: 0 reviews	It should have a sticker on it, near the plug, if not re-post. __________________ Supercharged 2.7L 398 HP 501 ft lb !!

October 7th, 2011, 11:30 PM	#3
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	it does, and it has what looks like a blue stamp that says LB13 or something like that __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

October 8th, 2011, 07:28 AM	#4
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 879 iTrader: 0 reviews	OK, so it's an LB1, which is fine for a turbo application. What are you planning to do with it? __________________ Supercharged 2.7L 398 HP 501 ft lb !!

October 8th, 2011, 09:06 AM	#5
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	turbo on my mustang. What would be a safe compression ratio to run 6 psi? __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

October 9th, 2011, 12:55 PM	#6
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 879 iTrader: 0 reviews	9.0:1 at 6 PSI with an intercooler should be OK for a cast piston, but I would suggest you run 91 or higher octane fuel if this is your plan. If you are going to use forged pistons, you could get away with 10.5:1. I'm guessing that you are looking for more low speed torque in this engine, hence the high compression/low boost combo? If this is what you are after, then I suggest that you use the stock valve sizes in the head and PM me for some porting tips. What cam are you planning on using for this? __________________ Supercharged 2.7L 398 HP 501 ft lb !!

October 9th, 2011, 09:40 PM	#7
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	I have hyperutectics and about 10.3 to 1 right now __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

October 9th, 2011, 09:44 PM	#8
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	And yes im going for low speed torque, i have the stock cam in it, dont think i will change it right now. I have an external wastegate that is set at 6 psi anyway so i decided to keep high compression, due to the failure at power before with 6 psi __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

October 9th, 2011, 09:45 PM	#9
Mikel89us Regular 1991 Mustang 2.3L 11:42 @ 61 in the 1/8th Join Date: Feb 2011 Location: Logansport, IN Posts: 362 iTrader: 0 reviews	and i do have an intercooler too, front mount __________________ 1991 Mustang LX 2.3L 5 Speed convert 1989 Ranger 4X4 2.3L 5 Speed Entire turbo kit waiting to be used again.

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