My New GM Goodwrench Crate Enine

[1-ton]

Years back when i bought a crate for the ex wifes 90 V2500 burb it was a 4 bolt as well. For warranty purposes i had to buy that engine and not the 1/2 ton 2 bolt main.
I am pretty sure Moates has the usb tune as you drive option. I bought some of his stuff a couple years back but never used it as i decided to go LSx. Very happy with my LSx swap.

The last available GM Goodwrench, 4-bolt main, 5.7, TBI, swirl port engine was dicontinued in January of last year. There are a few still left sitting around in warehouses, but when thier gone...that is it. This previously mentioned 4-bolt main, 8.75:1 compression , TBI engine was not the correct engine for my 1991 V3500 anyway. These where for 1987 to 1990 1-tons with a non-overdrive Turbo-400 trans. Starting 1991 the 4-bolt main, swirl port 5.7 TBI engine was a 9.25: 1 compression engine with a little smaller cam. This engine was available from 1991 to 1995. I belive the compression increase was due to the new 4L80E overdrive trans, which first became available 1991. This previously mentioned 4-bolt main engine was discontinued in 2007. The 2-bolt TBI engine I bought was for 1/2 to 3/4 ton vehicles with a 700R overdrive trans, which is why it has the same exact compression ratio and cam in it as my trucks original 4-bolt main engine did. This TBI engine was much more widely available from 1987 to 1995. This is why Chevy still makes it available.

the Moates company enhanced tuning set up is a more user freindly mask or VE/spark curve table, which is much easier to understand for the average user than the factory GM ECM table is. The dynamicEFI set up is an even more user friendly Windows based grapical interface, which is basicly just a piont-and-click type deal. The problem is that both these set ups are for ECM's with no electronic trans control, which my 1991 V3500 ECM/PCM has.

 

[sreidmx]

The megasquirt can do trans control also..

 

[1-ton]

The megasquirt can do trans control also..

I went to DIYefi web site, and read up on a lot of info about the Megasquirt and Microsquirt system. They do look like great systems, the one draw back is that they cannot do trans control and engine control at the same time...its one or the other, but not both. If I had a lot of money to spend on the Megasquirt (MSx2) for engine control, and the Microsquirt for trans contrl, plus all the harnsses, it would be awsome. But, once you include the wiring harnesses into thier system, the Mega/Micro Squirt system becomes quite pricey.

 

[sreidmx]

You add on additional boards but your right it adds up.

 

[prolinews]

With that mild of a cam I would imagine the factory ecu would run fairly decent even without a tune.

 

[1-ton]

With that mild of a cam I would imagine the factory ecu would run fairly decent even without a tune.

You are correct, which is why I am going to concentrate on getting the engine in, running, and getting all the minor bugs worked out before I decide on how to aproach the custom ECM tune.