has anyone used the edelbrock performer rpm proflow injection before? it looks trick i like the fact that its multipoint and looks easy to adjust. but i would like to get some user input before i shell out $2g's trying to make my car run good.

I've dealt with it once. It is a decent system but is a pretty old design as far as computer management goes. It is fairly simple but if you alter the basic parameters too much you have to have Edelbrock reprogram it to get you close again.

If I were looking nowadays I would look at the Holley system for a basic system. You can go from there and spend lots of bucks and get alot more complicated.

I have run the system on four different engines. All have run excellent. The computer chip is selected based on camshaft duration at .050. Quite a bit of adjustment in the base program to dial around trouble areas. Units are also very reliable. The tuning manual is also very, very good. Install instructions are also very complete. Tech support is good although general public wait times can be somewhat long sometimes.

It's a pretty easy way to get into the EFI deal especially if you don't want to deal with a laptop. Technology of the computer is basically similar to a 93 GM application. Pretty adequate in the real world in my opinion.

It seems they use pretty good parts. I might think it would be ok more mild-med builds. If you want to get wild, maybe swap to a FAST box or something.

what about the holley commander 950 mpfi is that a better choice. it looks more involved to tune it but mabie that will pay off in the end.

Im a little biased but if you can swing it Id get something that supports a wideband o2 sensor without add on boxs. like the FAST xfi and classic ecu's will.

Doug

The 950 is a pretty large step up in features and tuning ability. By tuning ability I mean you have total control and responsibility of tuning in the fuel curves, accel enrichment, cold start and so forth. It has data logging, wide band fueling option. You'll have full access to the fueling and spark maps.

If you are simply looking to upgrade a fairly mild or typical high performance street motor to EFI AND you don't want to mess with a laptop the Edelbrock system is very, very nice for the first time user. It's nice for the first time user because many of the tuning details are already flushed out and preprogramed into the chip. Things like cold start, after start, accel enrichment. As long as the chip you spec is close to the camshaft spec these will be taken care of, and are some of the hardest tuning maps to get right.

The 950 has a CLEAR advantage in being able to tune ANY engine no matter the camshaft size, cubic inch, induction method or ignition type. The abilty to tune off the wideband O2 option is also a HUGE benefit.

From a operation standpoint of an engine, if I tuned up two engines for you that were typical say 383 400 to 450 HP and one had a Holley and the other an Edelbrock you would not be able to tell the difference. They would both run excellent. What I could tell you though is with the 950 and the wideband I could tune your cruising and part throttle conditions more precise to give you better fuel mileage.

I'd suggest the 950 over the Edelbrock if you are looking to run nitrous some day, the engine you have may need special tuning parameters, like knock sensitive due to compression, the engine is the first stage of development and you are looking to upgrade components in the future, I'd also suggest the 950 if you are really looking to "get into the nuts and bolts of tuning".