3.4l computer question
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Junior Member
Joined: Jun 2000
Posts: 17
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From: Sharon, CT
3.4l computer question
If i swapped out my old 2.8l for a 3.4l would I need a new computer??? I have read that all I will need is a 3.4 flywheel.
Thanks,
Mike
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1986 Firebird
2.8l V6 MPFI
Cold Air Intake
K&N Filters
Next is a Warlock muffler
Thanks,
Mike
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1986 Firebird
2.8l V6 MPFI
Cold Air Intake
K&N Filters
Next is a Warlock muffler
2011 Norwood Gathering
ThirdGen Firebird Rep
ThirdGen Firebird Rep
Joined: Jun 2000
Posts: 3,435
Likes: 4
From: Sarasota FL
Car: 99 WS6 / 00 SS / 11 CTS-V / 13 300
Engine: LS1 / LS1 / LSA / 5.7 Hemi
Transmission: 4L60E / T-56 / 6L80E / W5A80
Axle/Gears: 3.23 / 3.42 Auburn / 3.23 / 2.62
You would need a new PROM. Because the PROM is what carries the fuel curve, you'd need a PROM designed to accomodate 3.4 litres, not just 2.8 litres. Hypertech or FastChip can make you a custom PROM, along with many others.
Also, you will need to change over to different injectors to accomodate the extra volume. Pods8 (where'd he go??
) did a 2.8 to 3.4 swap in an '88 2.8 Camaro, and he actually used Ford 5.0 19lb/hr injectors. These will work, or I believe later GM 3.4 injectors would work as well.
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Jason E
'89 Camaro RS 2.8
Medium Grey Metallic/AT/T-tops/all power
Hypertech chip/2 K&N filters/Modded air box
Eclipse CD/Eclipse 100x4 amp/Boston4x6 plates, 6x9 RX 3 ways/ALL Monster's goodies
Alpine Alarm w/ Keyless entry
IROC tailights/t-windows
Also, you will need to change over to different injectors to accomodate the extra volume. Pods8 (where'd he go??
) did a 2.8 to 3.4 swap in an '88 2.8 Camaro, and he actually used Ford 5.0 19lb/hr injectors. These will work, or I believe later GM 3.4 injectors would work as well.------------------
Jason E
'89 Camaro RS 2.8
Medium Grey Metallic/AT/T-tops/all power
Hypertech chip/2 K&N filters/Modded air box
Eclipse CD/Eclipse 100x4 amp/Boston4x6 plates, 6x9 RX 3 ways/ALL Monster's goodies
Alpine Alarm w/ Keyless entry
IROC tailights/t-windows
Senior Member
Joined: Jul 1999
Posts: 619
Likes: 0
From: Normal, IL
I'm gearing up for the 3.4 litre swap in the summer, and I"m using the 3.4 block and heads for extra displacement, and injectors for extra pressure. Other then that, I"m using the 2.8 MPFI manifolds, plenum, computer, harness, sensors, etc. for ease of installation. I'm just porting out the intake to get more air to feed the displacement. Just another option.
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Reno
'88 Firebird LB8
"Cerberus"
Now: rusting on a side street til I get out of college
Plans: BUILT 3.4 motor with B&M racing tranny, Hotchkis suspension all around, lowering 1", Accel ignition all around, Splitfire plugs, 88 front bumper, ASCD Ram Air I hood, 91 GTA spoiler, formula wheels, Firehawk tires, restored interior (first on list)
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Reno
'88 Firebird LB8
"Cerberus"
Now: rusting on a side street til I get out of college
Plans: BUILT 3.4 motor with B&M racing tranny, Hotchkis suspension all around, lowering 1", Accel ignition all around, Splitfire plugs, 88 front bumper, ASCD Ram Air I hood, 91 GTA spoiler, formula wheels, Firehawk tires, restored interior (first on list)
Supreme Member
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Are you sure he'd need a new prom? I mean it makes sense, definately, but I've never heard of anyone changing it. 
That could mean they're running lean, of course...
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
That could mean they're running lean, of course...------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
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