Mystery Bird

iTrader: (7)

Just finished building and breaking in the new engine. It's a 381 forged stroker, TFS heads, and a LE cam 242/248, 58x lift on a 110 LSA. I have done minimal tuning so far and the cam surge in closed loop sucks. Question is; Is the cam too big to run in closed loop? I dont' want to waste a million hours tuning just to find out open loop is the way to go instead of closed loop.

moehorsepower

iTrader: (3)

That cam is not big at all, need more tuning or check to see how the O2's are reacting in CL

Mystery Bird

iTrader: (7)

Yeah, I have only done an intial tune of where I think it should run, O2's are new and appear to be working fine when logging data.

moehorsepower

iTrader: (3)

On your fueling hits with Data Master, are the cells white, green or red..

Mystery Bird

iTrader: (7)

LT counts I assume? Are you asking for a particular cell?

moehorsepower

iTrader: (3)

No, all the cells in general, if the cells are white then it could be something else, if the cells are red or white then the IFR might need to be adjusted for CL.

jay7199

iTrader: (9)

what are you using too tune?

Mystery Bird

iTrader: (7)

Tunercats

moehorsepower

iTrader: (3)

I use LT1 Edit to tune and Data Master to scan..

jay7199

iTrader: (9)

Car sounds good Mystery Bird, What exhaust? I need to get my car a tune, I have a 96 and the jett cable I was borring crapped out :/

Mystery Bird

iTrader: (7)

I was looking at the log and it's not long enough to be a good indicator. Anyway cell 7 is the worst, green 150's, the rest that did show up showed blms to be pretty close. I will have to do some good logging this weekend along with some idle tuning. But you think it can be tuned for closed loop?

Hooker LT's, matching ORY, no cat, 3in pipe back to Borla 40474 muffler, and a cutout right before axle.

Longbob

Closed loop for the street. Open loop for the strip.

That is, of course, if you tune your car for maximum performance for the strip and tune it like a carb.

Mystery Bird

iTrader: (7)

My last setup I did all my WOT tuning at the track and picked up a good 2-3 tenths over the mail order tune.

moehorsepower

iTrader: (3)

[QUOTE=Mystery Bird;16458620]I was looking at the log and it's not long enough to be a good indicator. Anyway cell 7 is the worst, green 150's, the rest that did show up showed blms to be pretty close. I will have to do some good logging this weekend along with some idle tuning. But you think it can be tuned for closed loop?



Of course, The only cars I tune open loop are motors with huge solid roller cams, sheet metal intakes and even some of those are still CL. Your setup is mild and not radical enough to have to run in OL..

Mystery Bird

iTrader: (7)

I'm glad to hear that. I'm diving in head first this weekend. Thanks moe