BS3, gen 7, FAST XFI...can any of them be piggybacked to control the trans and gauges with the factory ecm?


David

 

I know the BS3 can, Im failry certain the XFI can as well. Im not sure about the gen 7 but I dont see why it wouldnt. Have you called any of them?

 

The FAST will piggyback with the stock PCM for the tranny.

-Chris

 

DO you have to run MAP, MAF, TPS etc parallel to both for the trans to shift properly, A 4L60E reads those tables to shift doesn't it?



David

 

Does not EFI live allow you to make changes to the transmission controls? It might be worth looking into. Plus the auto VE tables is a big plus.

 

AHHH SOOOO uh EFI Live a no workie on a 97 and older LT1 car Grasshoppa.



David

 

BS3 will lead you to the promise land little blade of grass.

 

Oh yee one of most knowledge, I have found a most elusive good deal on a DFI Gen 7.....see the for sale section grasshopa.


David

 

Dave,

Seriously ask Ed what system he prefers for your setup. He just had a surgery so it might take him some time to answer.

Bret

 

you want to keep your gauges and control the trans? you will have to keep the stock computer and the splice into the sensors you need for both,
this probly won't help you much b/c you will lose your gauges but i know people that have used a seperate trans controller

 

Sounds like too much brain damage for what I will gain, Bret cammed the car to peak(I hope) around 6800.....thought the Gen 7 was a good deal, had alot of good stuff to go along with it(dual sync dist, wires, pro key, 6 AL, coil, 95 LT1 harness spliced with the gen 7 harness etc) Guess I need to back off, I do want to run a 4L60E and keep my speedo and gauges.


David

 

one solution, kinda costly, is the White Racing PCB Interface... I know they make them for FAST ECUs, but I think they make them for Accel boxes as well.

I bought one for my car and have ditched the PCM completely. The interface plugs into the the ECU on one side and into the stock harness on the other side.

The PCB takes care of all stock gauges except the speedo. There's another box which plugs into the PCB to take care of the speedo -- You change gear ratios through dip switches inside the box. For transmission control, a standalone TCI box is used (I didn't buy that option since I have a 6 speed). The PCB also takes care of things like A/C compressor control based on the pressure sensors and A/C request just like the stock PCM.

It's a quick install with very little wiring. The only thing that wasn't plug-in on my setup was a wire that had to go into the cabin and switched to ground to put the car in reverse (6 speed reverse lockout solenoid activation). I bought a hurst ball-style shift **** with built-in button (momentary switch) and tapped into ground from the cigarette lighter. Push button and the gate opens, allowing you to put the car in reverse. Release the button and the solenoid locks reverse out.

It's a beautiful setup... Simplicity is the best feature. Plus, trash the stock PCM completely (opens up a good spot to mount the aftermarket ECU). The downside is that it is pricey. I paid almost $700 for the PCB plus $900 for a used FAST ECU, software, tuning cable, and WBO2 sensor and cable.

 

Whats the best way to get a better engine management? I've seen some pictures of differnet looking cam sensors and I think they were using a crank trigger also but I never could figure out what they were using or doing and how well that type of thing worked. I don't see it talked about a lot on the computer forum and it seems like not much is said about aftermarket stuff in general.
Can yall provide a little more info on what is done to convert? what needs to stay? I've played with the idea of running aftermarket for wideband and what "seems" like better tuning for cruise and wot. About the only thing I can gather is that its about 2grand for a setup and it seems like you still need to run the opti for a cam signal.

I've never really put much into finding an answer to this, (and its just to kill my curiosity on the subject) but what do the NHRA stock and superstock guys run for their LT-1 management? I imagine they are running some type of FAST or similar setup BUT do they still run the opti for a cam reference or are they just running a type of batch fire that doesn't need the cam sensor and only a trigger sensor?

 

most nhra stocks run a crank trigger..you still have to run the hi voltage part of the opti. Most people run the holley 950 and some are going to XFI if they can afford it. I have seen a few run DFI Its the tuners choice most of the time and all that I have seen run batch alpha-N injection

 

Maybe a solution is to change over to the OBDll 12200411 computer. EFI Live supports the 2000 and up L31 Vortec motor that uses the 411 computer. Here are a couple of links for you to browse. In the second link Craig Moates has done quite abit of work with the 12200411 setup.

http://www.thirdgen.org/techboard/tp...-opinions.html

http://www.thirdgen.org/techboard/tp...-opinions.html