Hooked up my laptop and made a few runs.
I never reeved abow 3000rpm.
This is my first scan.

Cars is:

corvette 1991 6spd
lt4 hotcam
1,6rr
headers
LPE 114 heads.

How does it look...?

Download it here..


http://stalblom.datakultur.com/webpage/DD.uni

 

is it so bad

 

Well, you're not getting much response here so. . .

It's pretty bad. 180+ knock counts in 5.5 minutes of pretty mild driving. Your BLM's are way rich. Watch the Histogram under the View menu. You don't seem to use as many BLM cells as you should have for light throttle driving with some mild throttle once in a while.

Your temps look ok since it did get up to 177 or so at the end. I try for 177-184 where things seem to run more consistent.

Are you sure you base timing is correct? 6° ATDC? It seems you get more spark knock at light throttle when the timing maps are somewhat heavy than you do at full throttle where the maps take some of the excess timing out.

VEMaster will get your BLM's in pretty good shape after about 8 - 10 runs, up to about 3000 RPM's, where it quits being as much help.

You injector constant went to 11.02 at one point about 3k, 100% throttle but the O2 was still low. Seems weird to me.

Spark advance at this point was only 22.9. For that cam and heads seems like you'd want to spark advance coming in sooner, BUT with your spark knock I'd be worried. (Actually, that takes me back to wondering if your timing is set correctly for the PROM you are running.) Which PROM are you using? Injector size? Any more info?

I'm not a pro at this, my trucks not a thirdgen (which leaves me out of a lot of the discussions here), nor TPI, (although at one time is was thirdgen electronics, L98 engine and MAF TPI,) but I've been tuning a 730SD ECM in it with a Holley Stealth Ram for a while now. Plus I've tuned a couple of MAF cars a one other SD setup.

I'm sure a couple of the master tuners on here could spot a few other things and probably have some suggestions on how to correct them but. . . in this order I'd:

Get the timing verified/corrected
Check for false knock such as rattling, noisy tranny, exhaust, etc.
Work on the BLM's for part throttle especially
Then, tune for preformance by checking plugs, scans and performance.

 

thanks alot for your answer!!

I made a new scan today. I got a probleme with the fuel meter that showed halv tank, but I whas running on fumes on that scan. So the car almost died every time i put my foot on the gas.

This is my latest scan. To bad the laptop died after 2 minuts hehe

This is just after I refueld. The car where already hot due to my driving to the gas station.
Not so many knocks this time. I run 8 degrees of timing with the stock chip. Injectors are stock ones for my corvette.

http://vetteforum.org/webpage/after.uni


Thank you again for your feedback