Square or spread bore
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Senior Member
Joined: Apr 2000
Posts: 788
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From: Wichita, KS
Car: 92' RS
Engine: LO3
Transmission: Probuilt 700R4
Axle/Gears: 3.70 9-bolt
Square or spread bore
Which design would be superior for TBI? If I remeber right, square bores are for high revving engines. Am I right?
Supreme Member
Joined: Jul 1999
Posts: 4,310
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spread bore seems wider which is probably better for the wide TBI. But.... my 7547 wieand is square bore and underneath the opeing it opens to be as wide as the TBI so when I put my TBI on it I will grind the overhanging ridge on the top of the intake and the sides should be the same width as the TBI
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roysatikas
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Sep 22, 2015 08:15 PM