For about a year I have been working on a Throttle Body Fuel Injection (also called "TBI" for Throttle body Injection)
For an Odd-fire Buick V6 engine. I had troubles---I had an even-fire distribitor with an odd-fire cap on it.It ran a carbed
engine OK--- but did not run the closed system TBI worth a darn! I tryed everything-- different chips-- timing the works--One day it I thought that maybe I have the wrong HEI dist body--- So I pulled an old HEI off an odd-fire Buick Skylark and VROOM!!!!!! Now runs the TBI GREAT!!!!--- and has about 25% more power than a Holley 390 carbed Buick V6--- and has instant throttle responce and burns cleaner runs smoother-- WOW--WOW it runs great!!!
My engine is a 1975 231 odd-fire Buick V6-- it is a .50 bored 225 block and is otherwise exactly like a 225
found in 1967-1971 CJ5s and V6 powered Jeepsters. My odd-fire engine is in a 1983 Nissan 720 4x4.(Lifted-solid axle-sm420-- 35inch Mud Brutes)
Howell efi-- a major aftermarket vendor of TBI conversions -(a year ago) insisted that TBI could NOT be done to
an odd-fire Buick V6 (Jeep or Jeepster 225 ci)--They said that they tried it and it did not work--- They said that irregular intake manifold vacuums--and other Superstitious things would not allow the engine to run right with a TBI unit.
After several e-mails to Howell where they said that it COULD NOT WORK--- I contacted Howell efi by phone--
and they acted like I was stupid or something for trying to TBI an odd-fire-- they acted like since they failed on a Buick V6 odd-fire that I was nuts for trying-they got nasty and verbally abusive on the phone and hung-up on me. They said that even if I solved the timing irregularities to the TBI computer that vacuum irregularities and other
odd-fire gyrations would not allow the engine to run with a TBI------they were sure "Mr know it all" in attitude.--
To solve the odd-fire distributor (90/150) pulse ( that would normally be used to
control the TBI computer) I mounted a magnetic crank sensor(Trigger) on the vibration damper of my odd-fire
Buick V6 and ran the signal to an ignition module that used to run a Chevy 4.3 TBI system. The crank sensor mimics a 120/120 distributor signal that normally runs a TBI computer. With the crank sensor the module
thinks that it is an even-fire distributor signal. The guys that helped me do the odd-fire TBI are at : http://www.affordable-injection.com/
Now that I have done it and TBI on an ODD-FIRE Buick V6 is practical, Affordable fuel injection is NOW going to sell fuel injection kits for Buick 225/231 odd-fire engines!
Buick V6 conversions
Buick V6 Odd-fire TBI project
Nissan Rock Crawler and a Chevy 3/4 ton 4x4 hauler