Fiero 1227730 ECM conversion

[GTRS Fiero]

Do you have any of the necessary parts?  ECU, memcal, pigtails, mounting bracket, etc?  Will you be changing to DIS?  Is your Fiero a manual or automatic?  You may add a crank position sensor.

[Fierofool]

To go to a 7730, you would need to go to the digital EGR and use the crankshaft sensor that's in the 3.4 block.  The 7730 won't run the electro/pneumatic EGR solenoid of the 2.8.  A knock sensor would also be required.  DIS coilpack and module would be needed, too. 

[GTRS Fiero]

To go to a 7730, you would need to go to the digital EGR and use the crankshaft sensor that's in the 3.4 block.  The 7730 won't run the electro/pneumatic EGR solenoid of the 2.8.  A knock sensor would also be required.  DIS coilpack and module would be needed, too.

There are different code masks available for the 7730.  Depending on which code mask you use, you can use the stock EGR and HEI ignition.  The knock sensor can be used or not, depending on whether or not that feature is enabled.

All you really need is the computer, mounting bracket, pigtail, and memcal, plus a bunch of time changing out the wiring and doing the programming.  There are a few additional wires in the 7730.  The 7730 also has the ability to eliminate some sensors, like the cold start and fan switch.

[pgackerman]

f85gtron is now in the Orlando area.

Know that's the same state as you, but not sure Orlando is closer than Augusta.

[Fierofool]

This is the code mask.  It doesn't give any details as to what EGR is used but it's the $88 Code Mask for a 2.8.  There's a pinout included for a knock sensor and an ECM disconnect terminal for manually timing the engine with a distributor. 
http://www.gmtuners.com/files/Fiero_2.8_to_7730_$88_distributor.pdf

I thought I had read an article by Ryan, centered around the development of the Digital EGR Adapter Plate, that it was developled because the 7730 wouldn't operate the stock EGR solenoid.  I can't find that article.  Since his pinout for a stock 2.8 with distributor doesn't specify digital, I concede. 

It is known, based upon Ryan's development, that the DIS and digital EGR coupled with the 7730 greatly improves the performance and drivability of the engine. 

[GTRS Fiero]

http://www.gmtuners.com/files/Fiero_2.8_to_7730_$88_distributor.pdf

Fixed your link.

[GTRS Fiero]

$8F code mask is for DIS with a turbo

$58 & $59 work for dizzy or DIS setips

$88, $A1 for DIS setups

It seems that there were some $AF or $8A, or some such, that I had considered.

[GTRS Fiero]

Forgot to mention that you'll probably have to change the spark plugs, depending on what you are using now.

[Lurate]

I purchased the Digital EGR delete kit. Orlando is a long trek but worth it to get the job done well. Hopefully he'll be interested and have time

[Fierofool]

If you want to contact Ron, search f85gtron on here, click on his username and you can secure his email address.  It's best you do that on your own as opposed to us giving it to you. 

[pgackerman]

Does the timing change when a 7730 is installed? 

IOW, is it still at 10 degrees?

Do the degrees change if you have a 7730 and 1.6 Rockers?

[GTRS Fiero]

Um, don't you have a 7730?

The timing should be set from the crank position sensor.  It isn't static.

[Fierofool]

I think I read that you can program a change of timing into the 7730. 

[GTRS Fiero]

Yes.  Specific timing tables.

If you use a knock sensor, the timing is constantly variable.

This is a simplification, but the '7730 uses electro-mechanical timing with DIS and without the knock sensor, or variable electronic timing with the knock sensor.

[pgackerman]

So there's no ballpark area around 10 degrees the timing should be set to?

It's not like we can remove the lockdown bolt and expect the new ECM to handle that much timing variation.