The memcal mod is required so the injectors are triggered once every 4th distributor reference pulse (DRP). Without the memcal mod the injectors are trigger every DRP.

dave w

The Moates.net G1 memcal adapter board is usually required. The Moates.net Burn 2 will not program a factory original 27C512 memcal chip.

I STRONGLY RECOMMEND installing the Sense Resistor...

1227747 Wiring Schematics are here: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?304-1227747-ECM-Information-42

dave w

When the 16197427 PCM is configured for V8 MPFI the injectors are wired in parallel so that there are four injectors on each side of the engine. The 16197427 V8 MPFI system is wired exactly like the...

The '7427 can operate a per 1996 4L60E. The '7427 can also provide TCC for a 700R4.

dave w

It's a ton of work, but I would recommend the Cadillac 4.9 to 16197427 MPFI Conversion.

The timing tables from the 4.9 Cadillac will need to be interpolated into the 16197427. It's anybody's...

Using WBO2 with the '7747, usually requires using the AutoProm from Moates.net.

Using simulated NBO2 from a WBO2 has mixed reviews, sometimes the simulated NBO2 works fine.

The '7427 usually...

Maybe you made Fuel Table (VE Table) changes that helped improve the BLM's in the data log so the engine is running better?

dave w

I don't change injector bias. That doesn't mean changing injector bias is the wrong thing to do. If the "tune" responds positively to a change of the injector bias, that's a good clue that the...

I don't change the injector bias for factory stock injectors.

Correcting the VE Table is a good option to correct BLM's. Increasing the VE Table numbers will lower the BLM, meaning increasing the...

I don't have a good answer, maybe look at the Spark Parameters for a Large Cap HEI from a 1990 Corvette TPI :...

The attached $42 .xdl files are from reasonably good running engines.

dave w

To view parameter comments and tips, use the F10 key after opening a parameter. For example open Manual Transmission and press the F10 key.

See example below.

After setting manual transmission...

It's going to be VERY CHALLENGING setting up the $OD MPFI .bin for the 4.5 MPFI conversion. You will need to interpolate the 4.5 parameters into the $OD MPFI modified .bin file. Take is slow,...

https://ls1tech.com/forums/lt1-lt4-modifications/1298009-tunerpro-rt-v5-tutorial.html

dave w

Ok, first things first ... please post the .bin file you have modified for MPFI.

dave w

I once read a story where someone set out to cut a piece of wood. As the story goes ... the wood was measured with a micrometer, then marked with a piece of chalk and finally cut with a chain saw. ...

If you have excellent soldering skills and equipment, installing a 28 Pin DIP Socket into the Memcal is a low cost alternative to the Moates.net G1 adapter.

dave w

Attached is 16197427 MPFI Information.

Maybe converting the 2.8 TBI system to the 16197427 TBI is a GOOD first step?

My post for tuning the 16197427 with a Wide Band Oxygen Sensor (WBO2):...

I like the 16197427 for OBD1 MPFI. The 16197427 is well supported, affordable, and easily converted to MPFI. I would use the Ostrich 2.0 and Moates.net G1 Adapter.

dave w