Head chamber cc's
04-21-2010, 05:53 PM
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Car: 90 camaro rs
Engine: 409 sbc
Transmission: th350
Head chamber cc's
i am swaping my 88 firebird formula 305 tbi with a 88 chevy truck 350 tbi and i was wondering if any one could tell me what cc the heads are on both of these motors please and thank you
04-21-2010, 05:59 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
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Moved this to its own thread, and out of the Engine Swap forum, because it didn't belong where you posted it.
Approximately 58cc and 64cc, respectively. Actual results may vary.
Approximately 58cc and 64cc, respectively. Actual results may vary.
04-21-2010, 07:01 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: Head chamber cc's
i thought the L05 heads were 68cc.
04-21-2010, 07:06 PM
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Re: Head chamber cc's
New, stock, the LO5 heads are about 65 cc, while your '88 LO3 is closer to 55 cc.
04-21-2010, 07:09 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: Head chamber cc's
well that would explain my pre ignition problem with my s10.
04-21-2010, 07:20 PM
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Re: Head chamber cc's
Have you tried any de-carbonizing? Seafoam, or ATF? Also try filing the sharp edges off your spark plugs.
04-21-2010, 07:34 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: Head chamber cc's
i haven't tried that. its done it since i built the engine 2 years ago. i figured the compression with 68cc heads to be 9.0:1. i runs well on 89 or higher octane. i'm using rapidfire plugs.
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04-21-2010, 07:45 PM
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Car: 90 camaro rs
Engine: 409 sbc
Transmission: th350
Re: Head chamber cc's
thanks guys and sorry about posting in the wrong spot im still new to this site and just figured out how to do my own posting a couple days ago
so just wondering would you go with the heads on the 350 or swap my ones off the 305 to the 350 im working with a tight budget and im not really looking to make a 4 or 5 hundred hp car but would still like a little more power then just a stock motor
thaks for any help you could offer me.
so just wondering would you go with the heads on the 350 or swap my ones off the 305 to the 350 im working with a tight budget and im not really looking to make a 4 or 5 hundred hp car but would still like a little more power then just a stock motor
thaks for any help you could offer me.
04-21-2010, 07:47 PM
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Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: Head chamber cc's
i would use the 350 heads. compression would be to high with the 305 heads.
04-21-2010, 07:53 PM
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Car: 90 camaro rs
Engine: 409 sbc
Transmission: th350
Re: Head chamber cc's
thanks thats what i was thinking but im no mecanic im more what you would call a parts replacer lol but im learning one step at a time.
04-21-2010, 09:18 PM
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Re: Head chamber cc's
So you're at 9.3:1. That's not gonna cause preignition by itself. Not even with a stock LO3 cam.
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