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91 Firebird with 305 THI?

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Old Dec 6, 2013 | 03:08 PM
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Myfirstconvert's Avatar
Myfirstconvert
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From: East Coast
Car: 1991 Pontiac Firebird
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
91 Firebird with 305 THI?
I was wondering what I can expect from a pro charger install? Like horsepower, do I have to change any internals? Any info will help. I was looking to rebuild one for cheap if I can do that.

Any info will be greatly appreciated!!!

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Last edited by Myfirstconvert; Dec 6, 2013 at 03:11 PM.
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Old Dec 6, 2013 | 04:30 PM
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Formula 305's Avatar
Formula 305
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From: Saratoga Area, New York
Car: 1990 Formula Firebird
Engine: 305 TBI (LO3)
Transmission: WC T-5 out of an 88 T/A
Axle/Gears: 10 bolt, 3.42 & Torsen Posi
Re: 91 Firebird with 305 THI?
How much power you will get and how many supporting upgrades you'll need all depend on how much boost you run and how big of a pro-charger you bolt on.
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Old Dec 7, 2013 | 12:00 AM
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Re: 91 Firebird with 305 THI?
Contact ProCharger and ASK THEM??? Wouldn't they be the experts?

http://www.procharger.com/
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Old Dec 8, 2013 | 05:19 PM
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thomas1976
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: 91 Firebird with 305 THI?
Originally Posted by Myfirstconvert
I was wondering what I can expect from a pro charger install? Like horsepower, do I have to change any internals? Any info will help. I was looking to rebuild one for cheap if I can do that.

Any info will be greatly appreciated!!!
They advertise around 60%, that equals around 270hp on the L03, which sounds wery optimistic to me.

I would opt for DIY 350 or up, with TBI, will easy get 1hp/ci.
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Old Dec 9, 2013 | 05:43 PM
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Myfirstconvert
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Junior Member
 
Joined: Oct 2012
Posts: 93
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From: East Coast
Car: 1991 Pontiac Firebird
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: 91 Firebird with 305 THI?
Originally Posted by thomas1976
They advertise around 60%, that equals around 270hp on the L03, which sounds very optimistic to me.

I would opt for DIY 350 or up, with TBI, will easy get 1hp/ci.
Just want the most horse power without doing a motor swap.

Thanks
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