super stock open June 22, 2009 11:04AM
What the difference between the SSO (super stock open) class and the HSS (heavy superstock) class on the NTPA circuit
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Re: super stock open June 23, 2009 02:48AM
SSO is 650 CID, overhead cams, hemi heads, & intercoolers are legal. As I recall HSS limits the alkys to 505 CID & no OHC. I don't know about the hemi heads & intercooler. Basically HSS is designed for the smokers to be competitive while they can't keep up in SSO at this time.
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Re: super stock open June 23, 2009 03:10AM
HSS is 650 CI, no overhead cam , no hemi head, valves must be parallel to each other and with in 15 degrees of the cylinder. no intercoolers
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