Converting 1UZ-FE to conventional distributor Ignition ?

adventures_more · Post by **adventures_more** » Sat Sep 15, 2007 11:45 am

I was considering doing a 1uzfe into my Lj71 , but with the expense of an aftermarket ECU , Fuel injection side ( hi pressure pumps , etc ), etc on top of the conversion , did,nt want the complexity . wanted to keep it simple !

I have heard of someone else somehow modifying a HEI chev/ford, etc distributor to work with it , ( I would run straight gas LPG with gas research convertor & carb's ,ect )

Has anyone done this sorta thing before & how did it go ?

LOLYF · Post by **LOLYF** » Sat Sep 15, 2007 11:55 am

It would be cheaper to wire up the standard ecu and it will run better.

adventures_more · Post by **adventures_more** » Sat Sep 15, 2007 11:57 am

except most the good 2nd hand one's don't come complete , you need to buy a 1/2 cut !

LOLYF · Post by **LOLYF** » Sat Sep 15, 2007 12:01 pm

Iv'e never seen a half cut for sale but nearly all the 1uz's ive seen come with an ecu (includeing my own)
They can be hard to find with uncut looms, but how hard is it to join wires?

turoa · Post by **turoa** » Sat Sep 15, 2007 1:03 pm

1) you dont often get half cuts in NZ

2) The standard ECU is fine

3) its not hard to find one with an uncut loom. They come up on TM all the time. I bought my motor with a cut loom and got a new loom/computer/ignitors for $180 on TM

Engineer · Post by **Engineer** » Sat Sep 15, 2007 4:04 pm

turoa wrote:
2) The standard ECU is fine

correct, toyota didnt spend god knows how many thousands upon thousands upon thousands on developing their ecu's to have them replaced by a "top quality" aftermarket item. A factory computer is far more advanced than say a link or motec and if your wanting to keep the engine standard you might aswell go that way. the engine will idle correctly, run smoother an overall just be better

Ryan.

Madaz · Post by **Madaz** » Sat Sep 15, 2007 8:05 pm

I think the standard ecu is fine, day to day reliability ,cold starting, ect,ect
also will a after market ecu "learn" how to run with a supercharger like a factory computer will?
There are quite a few people around who can rewire a standard computer,
as for a fuel pump if you cant spend $300 bucks on a new pump you shouldnt even be starting a conversion

bernie · Post by **bernie** » Sun Sep 16, 2007 8:07 am

I have to agree with most everyone else here, the std ecu is the way to go, almost fail safe done properly. but if you are looking to run a conventional v8 type distributor on one of these engines, it is ralativly simple, but can be costly so you may want to weigh that up against keeping the std ecu. basicliy the distributor is cut down to be as low as possible, an adaptor housing is made were the body of the distributor is fixed to, and the adaptor housing is fixed to one of the alloy cam covers, the fixing mounts are slotted to provide advance/retard and the shaft is remachined to provide a hex like a allen head bolt, the hex drive is fixed to one of the camshafts. i have built many systems like this for the stockcar guys, and they work great for them, the other system you could look at is a crank trigger.
one other thing you will have to consider is the intake manifold, in the past i have done quiet allot of dyno testing trying to make a carb work on one of these manifolds to get around a rule (call it cheating if you like) i did everything from remote excellerator pumps to epoxying up the intake manifold, with over 60 dyno pulls and hundreds of hours, i could not make it work, the idea was abandoned, the bloke changed classes as per the rules at the time and a 4 bbl intake manifold was bolted on. even though you are using LPG i believe you will be in the same boat. "Harcourt" do a nice 4 bbl intake manifold.