I have a quick questions for anyone that has been using Accel's Gen 7 DFI system. I'm currently running a 355 cid SuperRam injection with the stock ecm, MAF and custom chip. I'm getting sick of playing with the chip end of this cause no one can ever get it exactly where I need to be. I was thinking of burning my own and giving that a shot, but was wondering if it would just be worth it to go this route.

I'm going to be putting a turbo on it within the next year, so I figure this may be the way to go. Anyone have any input?

I'm trying to decide which way to go...should I just go with the 3 bar MAP setup from the get, so that when I put the turbo on I'm already that far ahead?

Also, anyone have any input on the Wide Band or (Linear with Accel) O2 option?


Thanks...

 

I really like my DFI, i know people will say that you can do all the same things with stock style ecm's, well you can, but there is a BIG learning curve on programming the stock ECM, and if you plan on running boost, you'll need a Sy/ty 749 ecm.

I like the simplicity of the DFI, the customer service is TOP NOTCH!!!!. The unit and WB 02 is definiately not cheap though, so far i have no problems with my ECM or WB02, except for the plug and play harness that i'm using (which had some serious wiring issues). some day i'll install the accell harness that came
with the DFI system.

later
larry

 

Although the DFIV-7 has enough resolution that you can use the 3bar from the beginnning , you really only want to run what you need.

Are you going to run over 14lbs? Is the combo going to be the same when you boost it? If you are then put it in now, if you are going to change the combo you might want to put the right one in now and then swap it out when you change the combo.

 

I was only planning on running about 10-12 PSI of boost, maybe up to 14 PSI max...Everything I have now, is pretty much what I'm going to stay with when the turbo's getting put on. I'm just trying to figure out the easiest way to do this the first time, rather than buying something for now, and then having to change it down the road.

Basically where I'm at now with the car is down to the tuning / chip burning headache to get past and I'm looking to do it the right way without spending more money than I need to.

Thanks Guys!

 

If your planning on running 14#'s or less than all you will need is a 2-bar MAP sensor,which will provide you with better resolution in your maps, it will be cheaper to run the stock ECM/Chip combo, just because most of the software is free, but you still have to buy, chips, prom erasers, burners, and a few other things, then you have to learn how to manipulate GM code to do what you need.

The DFI is much easier to understand, once the system is installed in the car, all you need is a laptop, communication cord and power key (needed for changing data). very easy to tune on the fly. and the new datalogging in the 4.0 version is a big improvement from its previous versions.

later
larry

 

O.K. That sounds like the ticket here. Now the Wide Band O2 option is something that can be added later if I decide on that right?

Basically for now, it would be the DFI for a 2 bar MAP sensor setup that would get me going pretty good?


Thanks!

 

Yes, you don't need the WB...but it is a very useful tool when tuning... you can get one of those innovative WB very cheap (around $350) compared to the accel unit. (around $1000). The Innovative will not connect to the Accel system, so you'll have to use them in parallel.

later
larry

 

Larry, thanks for the info! You helped me out a lot...

 

If you are going to purchase a wideband I would reccomend you spend the extra and get the accel one.
If you buy another brand you will have to make all of your changes in real time while trying to focus on gauges and driving.
With the WB integrated you can tune by yourself. You drive down the road/dyno and datalog the run, come back overlay the info make changes. This will get you better as you can think out your changes.
Bottom line is spend more money on the integrated WB but save a ton of time tuning, not to mention you will tune better as you can anylyze all of the info you log.

 

O.K. That's a real good point. I think I'll go with the Accel Wideband O2 when the turbo is put on. For now I'll just wait and get it running like it should have been all along with the 2 bar Accel DFI.

I'll be so glad when all this work and money finally pays off. I was so disgusted with my last track experience with the car not running right. My old 305 would have given me a hell of a run and this motor should be pushing at least double the hp that motor had...


Thanks again guys!


By the way, is their any place you would recommend going to for the DFI setup?

 

K&G Bromall PA, Talk to Lynn 610-359-1616