Quadrajet ECU upgrade worth it?
Thread Starter
Joined: Oct 2009
Posts: 215
Likes: 12
From: Central Ks
Car: 1985 Pontiac Firebird S/E
Engine: 350, .5 lift cam, Holly 650
Transmission: Monster Transmission 700R4-2K stall
Axle/Gears: 4th gen 10 bolt, 3.42
Quadrajet ECU upgrade worth it?
I have seen places where you can get a new chip to replace the factory one in the ecu on cars with quadrajet carbs.
Can this even be worth $165 or is it a waste of time and money? I have put in a crate motor and cam and all sort of other goodies (nothing drastic of course) but the only wired components on the engine are : Mixture control solenoid, tps, choke heater, knock sensor, oxygen sensor (not ever sure if it works, I have to check it) and the HEI distributer (stock).
Can this even be worth $165 or is it a waste of time and money? I have put in a crate motor and cam and all sort of other goodies (nothing drastic of course) but the only wired components on the engine are : Mixture control solenoid, tps, choke heater, knock sensor, oxygen sensor (not ever sure if it works, I have to check it) and the HEI distributer (stock).
TGO Supporter
Joined: Jul 1999
Posts: 3,838
Likes: 4
From: Another world, some other time
Car: 86 LG4 & 92 TBI Firebird
Engine: The Mighty 305!
Transmission: 700R4
Axle/Gears: 3.42
Re: Quadrajet ECU upgrade worth it?
I have a chip. It bumps up the timing and delays the TC lockup a few mph. I would just adjust your base timing and forget the chip. WOT is adjusted by the secondary hanger and rods.
Last edited by Justins86bird; Mar 28, 2015 at 11:49 PM. Reason: misspellings
Joined: Dec 2005
Posts: 4,796
Likes: 16
From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: Quadrajet ECU upgrade worth it?
I have a 320hp 355 in my 84 T/A with the Factory 305 ECm running my Qjet. The Carb was rebuilt by cliff ruggles but otherwise is stock. the ECM runs it just fine.
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