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62 327 DIFFERENCE BETWEEN 250 & 300 HP-What modern fuel to use?
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garygbnj
I love my Chevy Chevette!
| Posts: 1
| Joined: 10/12
Posted: 10/06/12
04:39 AM
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Besides the double hump heads are there any other differences between the 2 engines?
They are both 10.5 to 1 compression. What modern fuel will they run on? Do the valve seats have to be redone for survivability?
The corvette 327 is 11:1- what modern fuel do they run on?
thanks
gary
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/06/12
06:57 AM
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It has a little more camshaft... Believe eit or not that is it...
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/06/12
07:05 AM
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garygbNJ welcome to Super Chevy.
Is there a reason you need to have the engine specs? If so I'll dig them up for you.
Does the NJ in your name garygbHJ mean New Jersey. If so there are a couple guys on the Super Chevy site from there...
Bob
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/06/12
04:11 PM
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"1962 Technical Specs for Chevrolet Engines"
HP DISP Comp/Ratio Carb R/Ratio Cam/Type Head/CC
250 327 10:50 Carter/AFB 1.5 Hyd 62.20cc
300 327 10:50 Carter/AFB 1.5 Hyd 62.20cc
300 327 10:50 Carter/AFB 1.5 Mech 62.20cc
340 327 11:25 Carter/AFB 1.5 Mech 62.20cc
Bob
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/06/12
05:00 PM
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"1964 Technical Specs for Chevrolet Engines"
HP Disp Deck Valve Size Cam Lift Head Casting #'s
365 327 .014 1.725/1.505 .399/,399 876,520,842
375 327 .014 1.945/1.505 .399/.399 041,186,291,461,462,492
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/06/12
05:21 PM
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"1964 Technical Specs for Chevrolet Engines"
HP Disp Comp/Ratio Carb Manifold Cam/Type R/Ratio Head/Vol
365 327 11:0 Carter/AFB 3844461 Hydraulic 1.5 58.68
375 327 11:0 Fuel Injected 3826810 Mechanical 1.5 58.68
300 327 10:5 Carter/AFB 3799349 Hydraulic 1.5 57:50
250 327 10:5 Carter/WCFB 3844457 Hydraulic 1.5 54.90
Bob
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/07/12
12:42 AM
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Just some FYI for CHP guys:
I finally found my Chevy and Ford specs. Depending on your application I can get you CarburetorNumbers intake manifold numbers etc. All I can say is no I don'thave the number.
Bob
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redneckjoe69
Everything in my driveway’s a Chevy
| Posts: 604
| Joined: 02/10
Posted: 10/07/12
04:34 PM
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i would say yes, you need hardened exhaust seats for todays unleaded gas. 11.1 is about the max compression for todays gas, if you have aluminum heads. cast iron,...10.1 max.
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pepsi1
Big Block power for the win
| Posts: 899
| Joined: 03/11
Posted: 10/07/12
07:50 PM
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+1 Joe:
I would do both intake and exhaust valve seats. With the heavy valve spring loads it will really raise hell with the valve seats. Plus the heat of the combustion temps.
Bob
Did you see any of the Dega 500?..
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redneckjoe69
Everything in my driveway’s a Chevy
| Posts: 604
| Joined: 02/10
Posted: 10/08/12
06:36 AM
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yes, it was an awesome race i thought. looks like only the top 3 are gonna have a shot at the title.
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