12200411 PCM swap for 1996 to 2000 GMT400 trucks

[ol blue]

Anywhere to get the pin out data from anymore? I looked into this years ago and never heard back.

 

[Scottm]

two threads down

0411 Pinout Contact for Lextech

Lextech never checks in here anymore, however he can still be reached by his email for anyone needed the pinouts for an 0411 swap. As of 2023 he is still charging $20, and responds quickly via email. [email protected] Maybe a mod can sticky this? Or update the original 0411 swap post...

www.gmt400.com

 

[pl813239]

Attached is a 5.7L/4L60E 0411 HPT file with the GMT400 MAF curve and GM MPFI upgrade injector data. Also has a fairly hot high octane spark timing map. It might have knock retard on 87, it is what I ran the Express van on 91 with a 170F thermostat with. Total timing at WOT in the van was 29-31*.

So the maf table found on this file would work with a stock gmt400 air box? I ask because am slowly adjusting my 411 and this would be a huge help to get it dialed in.

 

[Supercharged111]

Attached is a 5.7L/4L60E 0411 HPT file with the GMT400 MAF curve and GM MPFI upgrade injector data. Also has a fairly hot high octane spark timing map. It might have knock retard on 87, it is what I ran the Express van on 91 with a 170F thermostat with. Total timing at WOT in the van was 29-31*.

I forgot to ask if this is a table you created by tuning a 411 on a truck or did you nerd out and extrapolate a blackbox MAF table into 411 format?

Also, I found this interesting.

You must be registered for see images attach

This histogram is from V7.5, I have a log of hp/tq (calculated) from V8 somewhere that has me around 360hp crank. I thought that was optimistic given my altitude, but 305x1.2=366 so maybe not. Now to see if I can dig up a MI datalog where I was in the upper 130kpa range.

 

[L31MaxExpress]

So the maf table found on this file would work with a stock gmt400 air box? I ask because am slowly adjusting my 411 and this would be a huge help to get it dialed in.

Should work well, it is an extraction from a black box GMT400 tune, converted to the 0411 data points.

 

[L31MaxExpress]

I forgot to ask if this is a table you created by tuning a 411 on a truck or did you nerd out and extrapolate a blackbox MAF table into 411 format?

Also, I found this interesting.

You must be registered for see images attach

This histogram is from V7.5, I have a log of hp/tq (calculated) from V8 somewhere that has me around 360hp crank. I thought that was optimistic given my altitude, but 305x1.2=366 so maybe not. Now to see if I can dig up a MI datalog where I was in the upper 130kpa range.

I nerded out. Given my 97 made 257 whp and 310 wtq on 91 octane and 272 whp and 330 wtq on E85 without the help of a Whipple, the 360 hp does not surprise me. I was in the 280 gm/sec range, same cam, 1.6 rockers and intake manifold you are running with the BBK 80mm on it. What kind of MAP are you seeing up there? I think mine was around 95-96 KPA with the 4" air duct setup I was running and the K&N drop in filter in the newer 01-02 Express air box.

 

[Supercharged111]

I nerded out. Given my 97 made 257 whp and 310 wtq on 91 octane and 272 whp and 330 wtq on E85 without the help of a Whipple, the 360 hp does not surprise me. I was in the 280 gm/sec range, same cam, 1.6 rockers and intake manifold you are running with the BBK 80mm on it. What kind of MAP are you seeing up there? I think mine was around 95-96 KPA with the 4" air duct setup I was running and the K&N drop in filter in the newer 01-02 Express air box.

NA we see about 79kpa at my house.

 

[L31MaxExpress]

So the maf table found on this file would work with a stock gmt400 air box? I ask because am slowly adjusting my 411 and this would be a huge help to get it dialed in.

Also worth mentioning, the injector data in that file is also an extraction from a 2008 Express 4.3L that had the newer MPFI upgrade injectors from the factory.

 

[L31MaxExpress]

NA we see about 79kpa at my house.

What are you seeing with the Whipple though? Does it even hit 100 kpa? My baro reading is 98-101 on most days here. The 383 will pull down to 90 KPA and even 88 KPA on some days. The 350 was a bit better only pulling down to 95-96 kpa. The intake is the same, but the 383 is pulling a lot more air through it.

 

[Supercharged111]

What are you seeing with the Whipple though? Does it even hit 100 kpa? My baro reading is 98-101 on most days here. The 383 will pull down to 90 KPA and even 88 KPA on some days. The 350 was a bit better only pulling down to 95-96 kpa. The intake is the same, but the 383 is pulling a lot more air through it.

I see now that I chopped the whole right column off of my image. In the past I'd usually hit 110kpa, but on that day I saw 116.