i'm having a hard time getting my custom drivetrain programmed using my stock computer. i'm learning as much as i can but its rather slow this way. i would like to use the stock speed density ecm using my 730 that came from the factory since it seems to be programable yet i can't find a shop in michigan that knows how to deal with it. i have all the equipment necessary and have even gotten the car very close but dialing it in i just don't know enough.

tpis burnt down my last motor with their terrible programming and LPE in indiana is the only other major named shop i can think of that might know how to work with the stock setup.

all the shops in michigan are telling me i have to switch to DFI...yet i don't have anything like forced induction or otherwise that would really benefit from it.

any suggestions on what i should do, i think the shops in michigan just want the money to change to dfi on top of programming....

 

My vote is to stay with 7730. I've seen too many people try to use DFI on a street car where it wasn't nessary and they spend the whole time trying to tune it

What does the car have done to it?

 

What has been done to your engine that needs custom programming?

 

what would you like to know that would require knowledge on the programming??


for starters its a 388 ci sbc.
10.8 to 1 compression
gm fastburn cylinder heads that have been reworked as much as possible
it has a comp cam hydra roller with a duration @ .050 230/236 but the valve lift is .622/.570 and lobe separation is 111.0
running a gm 4340 steel crank
crower stroker rods
diamond forged pistons
miniram III that has been ported and modified to the hill
30lb svo injectors

and many many other little things......

full 4" exhaust with custom lt headers
custom built 700-r with a 3200 stall vigilante
3.73 rear

that's about all for now, but enough that would require a chip i think or no?

 

thats not a bad setup, definately doesn't warrent DFI just a good chip.

 

That .bin I sent you should get you close, stay with the 730.

 

The 730 should have absolutely no problem with your setup. Go on thirdgen.org and post for tuners in MI. There's got to be someone or better yet, read up and DIY. As long as your block learns are "in range" it should be safe to drive around ,just don't go WOT until you've been to the dyno w/ a wideband.

Steve

 

block learns are in the range but the tunning isn't where it should be. michigan is lacking in the tunner department both commercially and locally with just persons.

i've been learning as much as i can but work delays that, we all know how that is.....diy over at thirdgen has been somewhat helpful but there is only so much people can do without the car in sight.

i'll keep at it, i just wanted an opinion as i believe the same as those of you who say the stock setup should work. no reason i should have to fork over another 900 to start all over again with a new set of problems when it's running.

 

When you say "tuning isn't what it should be" what do you mean?

Are you having driveability problem - stumble or bog? , poor idle quality, cam surge, rich smell in the exhaust, Tip in problems, WOT not making power, etc.

Steve

 

I was wondering if you could adapt the 7730 pcm to a 94 LT1 and have boost functions and the such....

Possible?

 

Howell engine development in Marine City has been tuning that ECM for a long time now. Thats where I went in 1996 and paid a 4 hour cosulting fee with Bill Howell Sr. and he sat me down on a tabletop ecm lab. He walked me tru every field on the obd1 LT1 ecm with quite a bit of detail using the tts master tune software and I walked out with a very good tune for the "second stage" era of my car. I also walked out with print screens of all the tables settings for refferance.
Bill's son last I knew was running the shop since his dad retired, but matt was right along his dad for years!!!!!!!!!


I'd use Howell myself if I was doing a 730 project myself http://www.howell-efi.com/

 

steve i'm saying that you can just tell something is off. there are areas that need to be worked on as a few tip in spots on the fuel map as well as some other areas. starting is a bit rough but it's getting there and at times it will act rich as it spits fuel out the exhaust on occasion so it needs some work indeed.

hotrod, as soon as i get the car back i plan to check them out...thank you for that reference!

 

Highlander,

You would have to ditch the optispark and run a TPI style distributor. Then rewire for a 730 and run SyTy $58 code to manage boost. You would loose EGR function doing this. Oh yea, there would probably be Tach and speedo problems as well. If your running a 4l60E tranny you'd need a trans controller as well.
This is just off the top of my head, there's probably more issues.


Steve

 

Damn this gets tougher every day...

I have an m6. but I do not want to go with a distributor.

So there are some compromises I dont want to make...

 

Highlander,

Looking at your sig, your probably maxing out your MAF already so you're probably running some crazy numbers in your PE table just to keep fueling that thing after the MAF pegs. If this is the case, and your not satisfied with your tune ,your probably looking at DFI time.

Steve