Help needed! converting 202 to delco

Converting To Delco ECU From Carby Or Other Injection Systems
User avatar
Elijah Bruce
Posts: 63
Joined: Fri Jun 25, 2021 7:47 pm
cars: 1975 Holden Kingswood Utility

Re: Help needed! converting 202 to delco

Post by Elijah Bruce »

well i am a bit stumped now, i have gone and changed the VE tables to suit some more logs that i did. Even with changed VE tables im still getting a rich reading
Shake N Bake!
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Help needed! converting 202 to delco

Post by Holden202T »

the same readings or is it slowly getting to where it should be ?
User avatar
Elijah Bruce
Posts: 63
Joined: Fri Jun 25, 2021 7:47 pm
cars: 1975 Holden Kingswood Utility

Re: Help needed! converting 202 to delco

Post by Elijah Bruce »

Holden202T wrote:the same readings or is it slowly getting to where it should be ?
It’s a bit hard to explain. Still runs a little Rich at Idle (even with the VE charts changed) but as soon as I get going, it pulls like a train with good afrs!
A little 30-70run: https://youtu.be/3UwPdNrDN28
Shake N Bake!
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Help needed! converting 202 to delco

Post by Holden202T »

good stuff man, tuning is the fun part of the whole process!

also just so you know, the first round of tweaking the VE table wont always get it right, but do logs and make changes from it and evetually you'll get it spot on.
User avatar
Elijah Bruce
Posts: 63
Joined: Fri Jun 25, 2021 7:47 pm
cars: 1975 Holden Kingswood Utility

Re: Help needed! converting 202 to delco

Post by Elijah Bruce »

Holden202T wrote:good stuff man, tuning is the fun part of the whole process!

also just so you know, the first round of tweaking the VE table wont always get it right, but do logs and make changes from it and evetually you'll get it spot on.
Cheers mate. I think I’ve found the issue, this fuel pressure regulator is buggered and is putting fuel into the vacuum line and pissing it into cylinders 1 and 2. Makes sense because at idle this would affect afr’s but when enough airflow gets past it, it doesn’t make much of a difference
Attachments
22DD6843-775D-4AC2-AB90-28D9F6F6F946.jpeg
Shake N Bake!
kojab
Posts: 440
Joined: Sun Mar 22, 2009 11:52 am
cars: VT V6 supercharged in a corolla
Location: Sydney
Contact:

Re: Help needed! converting 202 to delco

Post by kojab »

Good find. Your explanation on being rich at idle sounds spot on.
User avatar
Elijah Bruce
Posts: 63
Joined: Fri Jun 25, 2021 7:47 pm
cars: 1975 Holden Kingswood Utility

Re: Help needed! converting 202 to delco

Post by Elijah Bruce »

kojab wrote:Good find. Your explanation on being rich at idle sounds spot on.
Yeah I’m glad I finally noticed it. It’s been driving me nuts the whole time and probably explains why I struggled to initially get it running because of the engine being flooded with my testing the fuel pump etc. now I gotta find $150 to buy a replacement
Shake N Bake!
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Help needed! converting 202 to delco

Post by Holden202T »

i had that issue once before, but i was running methanol, so the part of the manifold where the regulator went in was really cold, it was pretty each to notice when i rested my hand on the manifold!

anyways good you found the issue! im assuming if the diaphragm is split its probably also not regulating fuel pressure properly either so it should make a good improvement when its fixed.
v6bucket
Posts: 761
Joined: Tue Jul 21, 2009 10:02 am

Re: Help needed! converting 202 to delco

Post by v6bucket »

You may have trouble finding a direct fit replacement regulator, might have to adapt another regulator.
"Definition of a Drag Racer: A person who spends money he doesn't have on parts he doesn't need to impress people he doesn't know." - Grumpy Jenkins----- Poverty---
User avatar
Holden202T
Posts: 10311
Joined: Sat Feb 28, 2009 9:05 pm
Location: Tenambit, NSW
Contact:

Re: Help needed! converting 202 to delco

Post by Holden202T »

when i converted mine to use an adjustable reg i got a speedflow -6 fitting with an olive to go inside it, was a pain in the ass, but it did work.... after that i cut the end of the rail and welded a speedflow flared end on it, might be your easiest option if you cant find a reg new.
Post Reply