Pinto Car Club of America

The July issue of "Mustang Enthusiast" magazine has a nice article covering a build of a racing 2.3 engine.  It is a carbureted engine for mini-stock racing.  They milled for high compression, used 5.85" long rods, small crank journals, a 0.470" lift cam, and a very good build.  The head ports and valve size both look stock, but they did not say.  The intake is the oval port one (not EFI) with a 300cfm two barrel Holley.  The impressive (at least to me) is that they got 190 HP at 6,600 rpm and 173 ft.lb. at 4,800 rpm out of this.

Nice,Impressive #

Quote from: oldkayaker on May 17, 2008, 07:50:08 AM
The July issue of "Mustang Enthusiast" magazine has a nice article covering a build of a racing 2.3 engine.  It is a carbureted engine for mini-stock racing.  They milled for high compression, used 5.85" long rods, small crank journals, a 0.470" lift cam, and a very good build.  The head ports and valve size both look stock, but they did not say.  The intake is the oval port one (not EFI) with a 300cfm two barrel Holley.  The impressive (at least to me) is that they got 190 HP at 6,600 rpm and 173 ft.lb. at 4,800 rpm out of this.

When we  raced a ministock a lot  of guy's ran more carb than needed. Not surprised by the 300 cfm  but a little by the non efi manifold. How much did they mill off the head? quite a bit of power right there.

The article said they milled the block 0.030" to get a zero deck height.  The head looked like a open chamber one and was milled 0.130" to get a 36cc combustion chamber.  The article did mention they used race gas.  It had a 0.040" over bore and stock stroke, assuming a gasket thickness of 0.040", guessing 5cc for the valve relief cuts in the flat top pistons, the compression ratio is around 13:1, if my math is correct.

I am surprised they did not go for a roller  cam?