Anybody have any experiance at all with these guys? Looks perfect for what I need and cheap.

 

That would be RBob. I have one and it runs great after tuning. Even though they were meant for TBI applications, he now has a modification so that they will run MPFI applications. I am thinking of digging back out my Edelbrock TBI-MPFI setup out of the garage and seeing where I can get with it. I installed it on a 350 that I built and tried to tune the prom chips with it installed, but it ran like junk on the stock 1227747 ECM code. With the EBL, I think that I can get it dialed in much better.

 

Although I don't do the tuning part myself- I too started out with the piece of ****e Edelbrock programing that Westers improved muchly but still isn't running to my satisfaction. Was thinking of a Megasquirt or something that will run a wb O2 but ALSO run the EGR valve (which is soon to be programmed into the EBL I was told). I was under the impression that alot of the problems with the 7747 stemmed from the fact that it fires the injectors twice per rev instead of once like the TPI ecu's, which the EBL 7747 still does.

 

Give me an email at davefarr@telus.net

 

The main problem is lack of resolution in the stock code. The VE tables only run up to 3,200 or so and then it is a simple adder table. Same with the spark. Much of the stock code is all about keeping the emissions low. RBob claims to have a MPFI setup running well with his EBL. The EGR valve was not a big deal for me. I simply used the shift light output to ground the solenoid once the engine was above idle (set for 1,000 rpm). I then hooked the valve to ported vacuum through the solenoid and away I went. After VE learning it runs great.

Here is the dyno smog sheet from my G20s small cammed (ramjet roller at the time) 350 TBI.

 

So the EGR doesn't have any modulation, it's either on or off- how does this affect overall driveability?

 

Looks like you are running a vortec computer as well- how many systems are you running? Which one do you like the best?

 

1995 4.3 CPI setup with stock PCM (1988 S10 Blazer)
1994 3.4 w/ MPFI and 749 ECM, turbo'd (1987 GMC Jimmy)
1983 G20 with 350 TBI (EBL was 7747)
1994 G20 with 305 TPI run by Vortec PCM (Stock $0D code TBI PCM prior)
1997 G1500 with 365 Vortec run by Vortec PCM (was a 350, but bored .030 and crank off-set ground)

The EBL is by far the most easily setup of them. The advantage of the vortec computer is sequential injection, electronic shift transmission controls, and a much faster processor.

Stock EGR is essentially fully on or off, unless it has an EVRV type one (solenoid with 5 wires and heat sink).