North American Turbocoupe Organization



LA3 from other cars?
Noname
Guest
#1
I did a search but didn't turn anything up... So don't flame me yet [Image: biggrin.gif]

Is the LA3 only from the TC's? And do I need one when I switch to a 5 speed?
Reply

Walsted Offline
Posting Freak
#2
The LA3 was only originally in the 88 TC, as far as I know.

As far as NEEDing one when you switch to a five speed, that depends on what you mean by NEED. I'm pretty sure you could get away with what you have now, but there may be a few codes thrown.

Hope this helps.


------------------
Mike Walsted - NATO member
1986 5-speed TurboCoupe and 1985 5-speed XR7
Mike Walsted - Sold my 1986 5-speed TurboCoupe
Reply

Noname
Guest
#3
What computer was in the 1987 5 speed model? I really would like to have the right stuff as far as the 5 speed and computer are concerned.

Thanks for the help
-Ryan
Reply

Walsted Offline
Posting Freak
#4
The LA was the first one for the 87/88, then came the LA2, and finally the LA3. They are all swappable with each other, just a few differences as far as internal tables and BCS operation. I would get an LA3 if you can find one reasonably, (try RDOG - if he doesn't have a spare, he probably knows where to get one,) or get an LA or LA2 if you are going to control boost without using the BCS and want to save a few bucks, since they are usually cheaper if you don't get it from the salvage yard yourself.

Hope this helps.

------------------
Mike Walsted - NATO member
1986 5-speed TurboCoupe and 1985 5-speed XR7
Mike Walsted - Sold my 1986 5-speed TurboCoupe
Reply

Keith Nubel Offline
Posting Freak
#5
I have been told that the fuel and timing tables are differnet in the 5 speed. The auto has less hp and less boost. Something had to limit the power between the auto and 5 speed, so it would make sense that it's in the computer.

------------------
85.5 TC 5 speed, Ranger Roller cam, 3" exhaust system, manual boost valve, large VAM, SVO PE computer, front mount Motorsport intercooler & sport grille, ported upper and lower intakes,flow matched injectors, ported E6 manifold, 245/45/17 wheels & Tires,140 mph speedo,Motorsport lowering springs, under restoration
1985 TC
Reply

Noname
Guest
#6
Thats exactly what I thought, and my auto currently only boosts to 10 PSI... Garbage lol
Reply

Noname
Guest
#7
Oh and I saw somewhere that the auto has a lower HP cam which makes the difference in 150 and 190 HP. I think the computer only controls boost, I could be wrong though. Its probably a regulator valve somewhere or something. Just guessing.

Ryan
Reply

Rodger Offline
Member
#8
My understanding is that the auto and 5 speed engines are the same, including the camshaft. The lower HP of the auto is because of lower boost and possibly less timing advance.
Reply

Chuck W Offline
Posting Freak
#9
The primary reason that the autos have less power than the 5spds is the 5 pounds less of boost. The ECU controls the BCS and limits it. The rumor is that the auto ECUs actually have a bit more aggressive timing curves than the manual ECUs.

First, dump the ECU-controlled boost and install a manual boost controller. Problem solved.

Next, after you swap to the 5spd, leave the auto ECU in there and deal with the fact it will throw a code for no auto tranny. You could go as far as to pull the wiring for those inputs as well.

The rest is the same between the two.

------------------
83 TC Clone, 87 Ranger 2.3T, 84 XR7, 80 XR7, 86 XR4 AND 88 Scorpio
NATO Member
83 TC Clone, 80 Cougar XR-7, 85 Volvo 244 Turbo, AND 88 Scorpio
Reply

Noname
Guest
#10
Thanks for the info [Image: smile.gif] I'm still curious as to what reduces the car to 150 HP? Does the auto just suck up the HP or something? lol

Ryan
Reply





Users browsing this thread:
1 Guest(s)



Theme © iAndrew 2018 - Software MyBB