My $59 problems/tuning a turbo camaro

[EagleMark]

Cut off is just that. A rev limiter. Cut in is where it will start working again.

[fasteddi]

Im just not sure if that table is active in this code...but the rev limit table says(not used) So im guessing that this one, the( fuel cut off), IS the one being used.. That car really struggled to shift @ WOT and the cut off cut in is so narrow in Rpms that I never even though that a fuel cut off was the issue. Took me a hour to find that table and relize that its not right..... The engine did make it over the limit though to shift, but like i said it was really sluggish. I really hope thats the issue.

[fasteddi]

Actually the Rpm limit is this 5349 is the cut in and 5461 cut out Rpms. Opps i replyed with the wrong #'s before. But anyways if you look at this log really close you can see the Rpms bounce a little at those Rpms, its suttle but it is there.
Let me know what ya think??? Look like that limit is working on that datalog??? Rows 30, 31...and really from 56-66 rows....

[EagleMark]

Remember this...

[fasteddi]

Wow blowing the entire intake off...that will give me nightmares... But i do think im on to somthing in the code, so as soon as the slow melts off well see if it helps.

[Six_Shooter]

That wasn't just the intake, that was also the head.

The rev limiter is always active.

[fasteddi]

I changed the Fuel cut out. Thanks for the help on that. Hope that was my high Rpm problem, as I would think it would be.

Anyways wish me luck tommorow as is gonna be about 50* out and sunny, so I will be driving it tommorow as a "daily driver" to go shopping in a town about 30 miles away. So Im not going to be beating on it, I just want to make sure the TCC locks up right, it drives smooth, and hopefully when I get closer to home I can open it up a little and see if that WOT is better.

Even though I am gonna be racing it, it still has to be reliable, and tommorow, a hour of datalogging should help me dial in crusing AFRs and smoothness on more of a spring like day with temps higher.

[JeepsAndGuns]

Remember this...

[fasteddi]

I hope he didnt think I was gonna blow my engine apart........ And just when I stoped having dreams about spark knock

[EagleMark]

Just a scare tactic so your careful! Besides you don't have forged pistons so yours wouldn't blow off the top end, it would be the bottom first... You have a good knock sensor and knock retard data, like my LT1 it will report how much timing taken out not just knock counts, but how much knock.

So many people want to add MORE SPARK for MORE POWER! I'd rather be all safe power...

[fasteddi]

I agree. Id dont wana push that bottom end with spark too much. I love my lil V6 too much to. Dont wana gernade the pistons!

[fasteddi]

I Have a few questions about AFR tuning in part throttle.. I know how to get the new number for the VE table on Excel but is the rounding for map(kpa) and such the same for when its past 100Kpa?? The car ran fine on a 50 mile trip this morning, just a little rich at crusing.. 14.5 average AFR. But thats to be exspected as it was 50-60 degrees out on the trip. Thats very warm considering im in ohio.

I also got the WOT down well, that fuel cut was the problem for sure! Opps on my part. But I attatched a log and figured it shows the AFR and timing. My timing seems high on 10Psi of boost(18*) but it never knocked so thats what im looking for I guess.

Thanks for the tips on part throttle VE changes. Also Im thinking that since my timing is so much lower in the unboosted cells compared to what the car had before the turbo that if i just bump up the timing a tad the AFR will lean out a bit. Whats good for MPG about 15-15.5 Afr??

On rows 19-97 is the 0-80Mph area..in 11.36 seconds. Not bad I think for a horrible start and a very slow spool up as Ive been messing with the wastgate duty cycle and just can get it to where I want it. Its only at about 9.5Psi. eaglemark scared me with those videos of heads and intakes blowing off

[dave w]

The rounding is the same for Kpa's above 100.

dave w

[fasteddi]

Thanks dave!

[EagleMark]

Its only at about 9.5Psi. eaglemark scared me with those videos of heads and intakes blowing off

Good!

Timing should drop during boost, but should be about the same as you were before boost. You'll have to get advice as to how to tune that transition from someone with experiance with boost. Somewhere there has got to be a way to get timing going down during boost, also have to take in account where PE is coming in because it usually adds timing as well as fuel or changes AFR during PE. So i guess you'd have to know if PE comes on from a TPS% or MAP.

No knock counts or with yours you know amount of knock retard and it was working well.