you can send to me if you still need help, dookie454 --> at --> gmail

 

Gary, just curious why you still use the MAF with the big blower since surely your maxing it out? Pure SD mode is working really good for allot of people.. well those of us that put tweak it enough that is

 

Pure SD here, open loop aswell. Lovin it Especially if you have a boost controller. I blew the charge pipe off one night now if i were running a maf it would have left me stranded on the highway.

Cheers to the op and everyone who is making this write up worth while.

I nominate this thread as a sticky

 

If my datamaster logs are not showing the BPW mS to be less than 2.0 does this mean my min PW settings are ok though?

 

I agree. This thread covers some of the most important issues with boosted LT1s.

I'm going to talk with my builder more today to get some clarification as to what they are having a problem with regarding my tune.

 

Yes you are right, if your BPW is not falling below 1.4ms then there's no reason to lower it (assuming 1.4ms is where the minimum is set).

 

I sent you an email with a bin file since I dont have any way to check the BPW with my LT1 edit. If you have a second take a look at it.

 

I think I just sent it back to you? pulsewidth was at 1.404 I changed it to 1.1 and the BARO RESET was allready at 500rpm.

 

I bought the car running MAF on OL with RPM enrichment. It didnt work for **** and i have it converted to 2-bar now. Ive ran all my vehicles SD as soon as i could afford it (02WS6, 04 GTO, 76mm LS2 etc.) Its just a bit harder to do this with the old software. HPTuners made the 2-bar setup so easy its sickening, its taking some time for me to learn all this tunercats stuff. Im not going to mess with it anymore this year but i do have it running pretty decent, cold starts and idle arent very good yet, and it surges while coasting in N. There is a dead spot when smacking the throttle sometimes too, but the driveability is so much better. Highway cruising is dramatically improved, and i picked up around 3mpg. Im going to have it fully tuned in the spring after some street tuning with a new wideband and some updates over the winter to get the boost up to about 18#, looking to make closer to 650whp.
Gary

 

sorry this made me smile.

 

Lower Injector constant some more to fix dead spot when you smack it to floor. I smack mine all the time just to feel the crispiness.

My warm starts are getting better but not as good as cold starts.. my cold starts are scary strong and fast.. probably lights up in 1/10th of a second cold (instant I hit the key). Im thinking cold cranking is richer than needs to be but it's not causing a problem at all.

 

So i finally got around to installing my converter/tranny. Now the car surges when deccel. And when sitting at a light sometimes.

Should i be looking at iat steps? or min pw?

 

Have you altered closed throttle spark advance or decel fuel tables?

 

No i have not. How should i change them?



Edit:
Are these the tables i should be adjusting?

closed tps spark advance vs rpm
ve vs rpm vs map
ve vs rpm vs map ext
dfco enable %tps vs rpm
dfco exist spark blending vs tps
throttle follower iac offset vs mph

 

Looks like them to me, however check a log and see if your injectors are turning off causing the surge... I had that problem and it was DFCO MAP settings, then I messed with the Min Pulswidth setting (put too low) and the problem returned. Now I have those two items just right (min pulswidth at 1.1) and no more problems.