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Jeff Chambers · 07-03-2003, 07:31 AM

No problems with a siamese bore block on the street. Cooling won't be an issue at all, as a matter of fact I'd expect the bores to stay even truer than a non-siamese since the bore walls are thicker and more stable.

With the Sportsman blocks, I think its probably more the RPM than the HP level. I saw three of the blocks crack the #2 main web last season on an SCCA A-sedan motor. This motor was only about 425hp but sees pretty continuous 6200-6500 operation on the road course. It is a nuetral balanced engine with Eagle crank.

07-03-2003, 07:31 AM	#14
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	No problems with a siamese bore block on the street. Cooling won't be an issue at all, as a matter of fact I'd expect the bores to stay even truer than a non-siamese since the bore walls are thicker and more stable. With the Sportsman blocks, I think its probably more the RPM than the HP level. I saw three of the blocks crack the #2 main web last season on an SCCA A-sedan motor. This motor was only about 425hp but sees pretty continuous 6200-6500 operation on the road course. It is a nuetral balanced engine with Eagle crank. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"