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Head Ports Size

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Old Oct 24, 2007 | 11:31 AM
  #1  
mlaudon's Avatar
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From: Wisconsin/Ft. Atkinson
Car: 89 Camaro Rs
Engine: 355 build up
Transmission: TH350
Axle/Gears: 2.73
Head Ports Size

Well im building my engine and i almost have enough money for some aluminum heads. But i dont know what size to go with? i know the valves are going to be 2.02"/1.60". With a 64cc Combustion Chambers. So should i put some 190cc intake or some 210cc intake on.

The engine is a 350 .o30 over 355 10.1 comp w/ 64cc heads.
Stock rods.
Stock crank.
Cam is a 480/480 lift.Hydraulic Lifters
Heads are going to have 1.6 roller rockers.
Dont know about intake yet.
th350 with a 3300 stall. auto
Tell me what you think of the set up?
Thanks
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Old Oct 24, 2007 | 11:48 AM
  #2  
1989GTATransAm's Avatar
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: Head Ports Size

Cam is to small on the lift. For the heads 180, 190, 195 or 200cc intake runners will do the trick. I would not go over 200cc on a built 355.
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Old Oct 24, 2007 | 02:11 PM
  #3  
mlaudon's Avatar
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From: Wisconsin/Ft. Atkinson
Car: 89 Camaro Rs
Engine: 355 build up
Transmission: TH350
Axle/Gears: 2.73
Re: Head Ports Size

what size cam should i use then cuz with the i mesed up the cam is a 512/512 lift
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Old Oct 24, 2007 | 02:33 PM
  #4  
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Re: Head Ports Size

Looks like the cam is the same (the old 280 Magnum it looks like); you just have 1.6 rockers.

Try to get chambers smaller than 64cc, if you don't have pinging problems now. With aluminum heads you need close to a full point higher CR to get the same cyl pressure (power output) as iron heads.
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Old Oct 24, 2007 | 02:47 PM
  #5  
mlaudon's Avatar
Thread Starter
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Joined: May 2006
Posts: 74
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From: Wisconsin/Ft. Atkinson
Car: 89 Camaro Rs
Engine: 355 build up
Transmission: TH350
Axle/Gears: 2.73
Re: Head Ports Size

So your saying if i want 10.1 CR i would have to go with a 62cc or a 60cc to get 10.1 CR. Im just dont know what size heads i should go with to gewt some good hp.
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Old Oct 29, 2007 | 09:07 PM
  #6  
Travis&camaro's Avatar
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From: Green and gold land
Car: 1984 Camaro
Engine: BIG BAD 360!!!!
Transmission: th350 shift kit 3600 stall
Axle/Gears: 3:73 posi
Re: Head Ports Size

Nice set up.. But I would go with 4valve after market aluminum heads if you can get the money. It would make a sweet *** engine.
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Old Oct 29, 2007 | 09:24 PM
  #7  
327???'s Avatar
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Posts: 622
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From: Rochester, NY
Car: '82 Sport Coupe/'89 bird/'77 280z
Engine: 355/2.8/L28E(t)
Transmission: TH350/T5/4 spd
Axle/Gears: 3.73/3.42/3.54
Re: Head Ports Size

I think a 195cc intake runner is perfect for a street/strip 350. My preferance would be Trickflow or AFR.

Originally Posted by Travis&camaro
Nice set up.. But I would go with 4valve after market aluminum heads if you can get the money. It would make a sweet *** engine.
Bad idea. It's seriously NOT worth the hassle, not to mention the MASSIVE price of a set of such heads.
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