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#1
11-05-2008, 04:02 AM
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Speed Pro Piston ID
I have 2 sets of Speed Pro pistons that I am having a hard time IDing. The part numbers are 7070P 030 and 7063P 030. Both look to be SBC. I have tryed Google, etc. but have had no luck. Does anyone have an old Speed Pro catalog they can check out for me?
Thanks, Jason  
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#2
11-05-2008, 04:14 AM
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Re: Speed Pro Piston ID
  
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#3
11-05-2008, 08:02 AM
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Re: Speed Pro Piston ID
7070P is for a 350 with 11.1:1 comp. ratio
7063P is for a small block 400 with 9.7:1 comp. ratio
__________________
1970 Chevelle SS396 L78 4spd 410 posi astro blue
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#4
11-05-2008, 11:05 AM
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Re: Speed Pro Piston ID
Awesome, thanks for the info. Do you know what CC chambers those ratios refer to?
Thanks, Jason
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#5
11-06-2008, 05:03 AM
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Re: Speed Pro Piston ID
7070P- 64cc=11.0 68cc=10.4 76cc=9.75 all with .025 deck clearance and .021 compressed gasket. 7063P 64cc 68cc 76cc std 10.95 10.5 9.7 .030 11.1 10.65 9.8 .060 11.25 10.8 9.9 all with .025 deck clearance and .039 compressed gasket
__________________
1970 Chevelle SS396 L78 4spd 410 posi astro blue
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#6
11-06-2008, 05:09 AM
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Re: Speed Pro Piston ID
Dave,
You are the best! Thank you very much. Jason
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