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LB9 heads

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Old Nov 28, 2007 | 04:34 PM
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camaro55427
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Car: 89 Iroc z
Engine: 350 carbed
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Axle/Gears: 3.73 10 bolt
LB9 heads
would LB9 heads b an upgrade for my lil LO3 or will they not work and waste my money?
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Old Nov 28, 2007 | 11:08 PM
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camaro55427
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Car: 89 Iroc z
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Re: LB9 heads
any body??
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Old Nov 28, 2007 | 11:31 PM
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Kevin91Z
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Re: LB9 heads
Yes they would work but they're not worth swapping unless you have the engine out of the car.
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Old Nov 29, 2007 | 12:18 PM
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Re: LB9 heads
why is that?
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Old Nov 29, 2007 | 09:26 PM
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Fast355
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Axle/Gears: 14 bolt with 3.07 gears
Re: LB9 heads
Originally Posted by camaro55427
why is that?
There is NO power to be gained from the switch. Often times, it will cost you HP to put the stock TPI heads on.
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Old Nov 29, 2007 | 10:28 PM
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Car: 89 Iroc z
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Re: LB9 heads
oh ok thanks
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Old Dec 3, 2007 | 07:25 PM
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Re: LB9 heads
The TPI and TBI heads are the same heads. You won't gain anything.
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Old Dec 3, 2007 | 07:29 PM
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: LB9 heads
Originally Posted by rs90 driver
The TPI and TBI heads are the same heads. You won't gain anything.
NO they are NOT, GET your facts straight before posting false information. THe TBIs used 187 heads with swirl vanes in the intake ports. The TPIs used 416s or 081s which lack the intake swirl vanes.
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Old Dec 4, 2007 | 07:53 AM
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Re: LB9 heads
Originally Posted by rs90 driver
The TPI and TBI heads are the same heads.
Not true. Different castings (with different casting #s), and used for different purposes.

You won't gain anything.
Probably true, stock versus stock.
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