LT1 tuning help
 

I took delivery of Peter Oliviera's 94 Camaro stocker yesterday in Las Vegas. I will be racing it in the nationals this week. I need some tuning help with it. I know nothing about tuning a fuel injection system yet. I will learn it. It is the Holley Commander 950 system. It has a severe drivability problem between idle and 3000 rpm. I'm open to suggestions. Thanks for any help.

Re: LT1 tuning help
 

Darrel, you sound just like me when I bought my F.I. Stocker. I kept opening the hood looking for the q.j. carb. I still don't know much, but I assume when Peter last had the car it was fine. That would have been at Seattle which right now-6:00 CST at my house, is at 823 FT. Vegas right now is 3881. Just like when you go to Denver, it's too rich. It is still too rich above 3000 RPM, it just clears up to make it more drivable at higher rpm. Phone Peter, tell him you want to lean it 3 numbers or 5% from 4000 down to idle. If it still feels funny, go down 1 number at a time until it runs the way it should. Just think of 1 number on the Laptop (up or down) as 1 jet size in your carb. Let me know if I can help, or find you help. J.R. Haddad.

Re: LT1 tuning help
 

Thanks JR. Peter said he's never tuned the car and has never changed it and he doesn't know how. As I type this I'm setting in the car in the trailer and trying to get laptop to read the box. No luck yet.

Re: LT1 tuning help
 

Try changing the map sensor and coolant temp sensor. There are ways to check them but if you are unfamiliar with the software it might be faster to change them at least just to rule them out as the problem.

Re: LT1 tuning help
 

Got it to run thanks to Derek Hake! He found a tune to load. I loaded it and it runs great! Thanks Derek. I'm pretty excited about this fuel injection thing now but have a BUNCH to learn. Thanks everyone else for the suggestions.

Re: LT1 tuning help
 

The 950 is a pretty easy system to play with. I started with it and eventually moved into a FAST 2.0 this summer. Pay attention to your logs and what they are telling you.

I fought an idle to 3kish misfire all summer. Turned out to be my opti. I put one of the MSD billet jobs in there and no more issues. Something to keep in the back of your mind. I have found these are fun cars to drive and there are some really fast ones out there. Have fun with it and if you need help, let me know.

Re: LT1 tuning help
 

Thanks Jon, I just discovered what I think will make a huge difference. One of the 3/8'' vacuum lines was off of one of the PCV valves. It has a newer MSD Opti Sparks on it. I got a spare too. Optispark doesn't seem to be one of GM's better ideas.

Re: LT1 tuning help
 

I think an ex-FORD engineer designed the Optijunk system!

And for what it's worth, toss the Holley 950 and put a Holley HP setup in there.

Re: LT1 tuning help
 

I'd love to do that but that'll be a long time before I can do that probably. $1600 upgrade Holley said.

Re: LT1 tuning help
 

get in touch with ed wright .he is on here. that's his business

Re: LT1 tuning help
 

Darrel, you're doing great. Learn about the car and EFI in general with the system you just paid for. Once you've made the car as fast as it can go
with that system, and you're thinking about buying a new one, wait 30 more days and there will be a better one, etc. etc. You've done a great
job as a driver. Stick with your strengths and budget to upgrade in the
2018 season. J.R.

Re: LT1 tuning help
 

seems you got it working. congrats on the win

Re: LT1 tuning help
 

That is pretty close. Won't find a lot of horsepower either, but the potential to find more will be there. You can do individual fuel trim per cylinder, can also do sequential injection with some legal mods inside the Optispark. Will also let you change injector vs. intake valve timing........ Datalogging is built-in and is far better than most other EFI systems, only a Racepak would be better but is not needed.

Re: LT1 tuning help
 

FAST XFI has all that. I have worked a lot with both. Most of the fast Super Stock LT1s are using FAST.

Re: LT1 tuning help
 

I am very familiar with tuning the LT1. I have many programs as well
I will be in Vegas Tomorrow(Tuesday) for the makeup race and regular Div7 race.
I would be happy to help you with it.
Duane Dickens
949-466-2272
Just let me know

Re: LT1 tuning help
 

Thanks JR. Good advice. Now whether I'll use it remains to be seen but I'm very conservative and have a tough time spending money on something I don't have to have other than obviously buying a race car. ;)

Re: LT1 tuning help
 

Thanks Duane. Actually Derek Hake called me a few minutes ago and asked if I'd seen your post. I will find you. Where are you parked? We are up north across from the crappers. First stacker east of goodyear. Says GARMIN on the side of it. Thanks for the offer!

Re: LT1 tuning help
 

Pun intended? ;)

Re: LT1 tuning help
 

I wouldn't touch nothing!

Re: LT1 tuning help
 

No, didn't think about that. LOL
But, that is what most use.

Re: LT1 tuning help
 

Duane taught me a LOT in the last couple of days. I'm totally comfortable with the system and making changes now. I picked up about 9 hundredths this morning doing what he suggested. That is after the better DA. Thanks Duane!