LS2 402 lean idle
LS2 402 lean idle How much overlap is too much to tune using factory sensors in closed loop?
AFR225 heads, LSX intake, 90mm TB, 1 7/8 headers w/ 3" duals and an H-pipe.
AFR225 heads, LSX intake, 90mm TB, 1 7/8 headers w/ 3" duals and an H-pipe.
I think that the MAF is going to max out. I went SD and have had alot of success taming the cam and getting my idle close. I have a similar setup I just couldn't swing the LSX intake and big TB yet.
Why is it so difficult to get an answer on this site sometimes? Seems like if it isn't an appearance mod or contain flow/dyno numbers, nobody can offer any advice.
Originally Posted by Tech
How much overlap is too much to tune using factory sensors in closed loop?
AFR225 heads, LSX intake, 90mm TB, 1 7/8 headers w/ 3" duals and an H-pipe.
AFR225 heads, LSX intake, 90mm TB, 1 7/8 headers w/ 3" duals and an H-pipe.
Being that you're even asking this question, I'd think it's safe to say that you'd be better off with a OLSD tune. Then you'll never have to worry.
Unless you have a very good reason for running O2's and closed loop, then don't.
Originally Posted by Tech
I don't think the MAF will max at idle. Thanks for the reply, tho. 
Originally Posted by white2001s10
There isn't any magic cutoff number for overlap since so many factors play into the oxygen content of the exhaust.
Being that you're even asking this question, I'd think it's safe to say that you'd be better off with a OLSD tune. Then you'll never have to worry.
Unless you have a very good reason for running O2's and closed loop, then don't.
Being that you're even asking this question, I'd think it's safe to say that you'd be better off with a OLSD tune. Then you'll never have to worry.
Unless you have a very good reason for running O2's and closed loop, then don't.
We are going to start completely over with it. The thing I'm having a hard time with is that the oxygen sensors (WB and NB) will never get an accurate picture of what's happening in the CC. How will I know for certain that the engine is getting the proper mixture if I can't get accurate measurements out of the exhaust? Wouldn't even an EGT sensor be slightly skewed with the outside air entering the exhaust port?
Trending Topics
Originally Posted by 98Z28CobraKiller
I didnt mean at idle. I meant at WOT. I had a hell of a time with my idle with the MAF on. It is much easier to get idling in SD mode and since you have to disconnect it to get the VE tables dialed in anyways, why not just leave it out? JMHO. It's really up to you.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Originally Posted by TAQuickness
to get accurate readings from you wb, you will need to be in open loop
I think Beau (or Bo?) was the only person to understand my question. I think the idle is actually rich because the 02s are reporting a false lean.
Last edited by Tech; Apr 8, 2006 at 04:31 PM.
