yellow73bb

I suspect that this has been answered before, but I can't find it anywhere.

I put a 700R4 (updated for the power/torque) into my car behind my 454. I have a 1227747 installed. I have a couple questions:

Did GM ever put 1227747 into a truck with a 7.4L and a 700R4? Or just the T400?

Which is the best bin file to use with my combination?

Thanks for the help.

John.

TheGreatJ

Since the 350TBI pickups used the '7747 and the automatics were all 700-R4's, it may be easier to take a 350 .bin and modify it for the larger displacement than to try to find a .bin that may or may not exist.

Just MHO.

c4boom

what did the 454 ss trucks use

yellow73bb

A little internet research indicates that the 454SS trucks had a TH400(E) the first year and then the 4L80E after that. I have not been able to find any information yet on what the difference is between a TH400 and a TH400E.

Did the 454SS have the 1227747?

Low C1500

Why do you need this bin any way, and yes I believe the 454ss had a 700r4.

Good luck finding a bin though!

yellow73bb

I want the ecm to control the lockup in the 700R4. If all the 1227747 based 454s drove TH400 transmissions, then can I still control the lockup torque converter on a 700R4 with the bin?

TheGreatJ

All 7.4's from '87-'89 had the '7747. Starting in '90 they got the '8747, as well as the '7470 and '7060 from '91-'93.


Seriously though, if you have a chip burner, just use a TBI350 vin K '7747 .bin and import the calibrations (except for the tranny stuff) from your current .bin.

yellow73bb

I guess I could, but my current bin is for a standard (4-speed). Isn't the spark table different in the auto?

JPrevost

Yes the spark tables are different but that's not an end all. It'll be closer than starting from stock. Take a look at the differences that GM made between equal drivetrains except trans. You'll find a good start that way. What kind of work have you done to the 454?
I'll search my bin library and see if I can find a 7747 454 manual calibration. But if not, I'll do a quick compare to see the GM did universally.

Grumpy

The truck calibrations are so miserable, that I'd suggest using a 350 auto .bin, and then look at the BPC, VEI+II tables, and main sprk from a 454, and import them into the 350 .bin. Then tune as necessary.

Be sure to run a search for 454, and 747 here, and catch up on all the patches, and details about that engine/trans..

yellow73bb

Thanks for the help. I've been tuning for a couple of years (off and on) with a 454 manual bin. I'll start with a 350 auto bin.

It'll be a few days yet till I get my exhaust back on my car, and then I'm taking a vacation for a week, and then I hope to get to work on tuning again.

John.

yellow73bb

So much for taking a few days -- the side pipes arrived today, they are on, and they sound SWEEEEET!

Is any of the 350 auto bins better than the others?

Thanks,

John.

TrevorH454

All 1990 454SS's had the 8747 with TH400, the 91-93s had the 7060 with 4L80E. My 1990 had a 700R4 that I put in, until I killed it - went back to the TH400, one day will do the 4L80E. My 1990 also has a 7060, but I put that in too.