Tuning for Mild Cam, Headers, etc....

[EagleMark]

Im guessing the hp would be around 230-250. Fuel pressure I have not checked but my blm and int stay around 128 if its right. The injectors ive not looked at yet either i just know they are stock.

That's a lot of cam for stock intake, TBI and heads! Let's hope it's more then 250 HP, but getting to the 6000 RPM range is going to be an issue.

Your INT and BLM of 128! Not possible at 60 MAP and 550 RPM... Must be in Open Loop! System has to go Closed Loop to see fueling changes in INT and BLM.

Don't do any WOT high RPM runs until you get some things figured out. Stock injectors and fuel pressure is no where near enough to fuel that engine, your going to be lean at WOT high RPM.

Do you have any data logs? Post them up so we can see what is actually going on.

[jim_in_dorris]

What BCC is this running?

[Davis_1377]

Here is a log file and its a ACSF bin i ran. There is a big hill at the beginning when i data logged. I also have a stage 1 and stage 2 bin that seems to do alittle better then stock. I meant my blm stays close to 128 when driving in closed loop. I dont have a heated o2 but im gonna get one later. I also have a throttle body off a 454 somewhere if it would help i could put on it, I dont know how these do on a 350.

[jim_in_dorris]

Mark, this may be one of those special tunes with blm min and max set?

[EagleMark]

Well he said this log was ACSF so if I have that bin I could analyze the data well.

Where did the Stage 1 and Stage 2 come from? Couple different companies use that name, one is reputable... still neither would be a custom tune for your engine, just a closer guess.

[EagleMark]

ACSF was superseded twice to AMUR. I compared the bins and no big changes... looks like emmissions tweaks.

End of your log has some idle time and BLM is 108, which is minimum, so it's taking out fuel and still needs more out. Rest of log BLM and INT are all over the place. No error codes. So this is exactly what I would expect for a stock chip and your built engine.

If you know the Stage 2 is for a 350? I'd run it till you can tune or find someone to tune for the engine. The Stage 2s I have seen have less fuel at idle and WAY more spark. SO watch for and listen for Knock. Some of these chips have been known to remove knock retard....

[Davis_1377]

The stage 1 I got off this website. The stage 2 is a JET one I bought awhile back, I can upload them all if anyone wants to analyze them. After a min or so in the log where I set for a min before I took off it had a good idle. If I could change something for now to keep an idle like that I'd be pretty happy cause I got pretty good power with the stage 1 and 2. I can data log the stage 2 later and upload that also if anyone wants to see the difference.