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Old 07-18-2022, 01:10 PM
sierrablue's Avatar
sierrablue sierrablue is offline
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Join Date: Jan 24, 2022
Location: Northern MN
Posts: 211
I'm curious about this too, as I know the GM TBI will be cheaper to do, but it's also more of a pain to tune. I'm sure somebody makes a program so you can use a modern computer for tuning it, right? The computer we used on the '88 TBI finally gave up the ghost and I'm not sure what to use instead. What're you using as a chip to start with? And I'm guessing you plan to tune it after that?

Is your plan still to use the 454 adapter to the 4-barrel manifold? I know the 2- and 4- barrels are both dual plane for these unless you get the Stage 3 intake from T/A, but the TBI can still theoretically take advantage of the dual-plane setup. And I know the 4-barrel manifold on the Buicks is just a much better design than the 2; the 2 is a weird shape and the Quadrajet isn't the only reason the 4-barrel makes so much more power/gets better mileage...

Thanks for the info Herk.
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Current Rig:
'71 Wagoneer (DD)
B350/TH400/D20
open knuckle D44 front (disc brakes)
6-lug conversion rear
http://www.ifsja.org/forums/vb/showt...79#post1734879

Previous Rig:
Tan '88 Grand Wagoneer
.030 over 401, TBI, headers
3" exhaust
31x10.5s
2" rear lift blocks
custom headliner
http://www.ifsja.org/forums/vb/showt...77#post1734777

"The engineering side of me says that it's more than strong enough. The redneck side of me says that it's going to fall apart and I need to beef it up."--somebody I know
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