WebJun 23, 2007 · They took the 290HP crate and put a set of the GM Fastburn heads on it, an Eddy Performer RPM, swapped to a Comp 270H cam, and some 1.6 roller-tipped … WebThe GMPP head (PN 12363400) with 300-cc rectangular intake ports (left) performs very similarly to the oval port head (PN 12363392) with 290-cc intake ports (right), if both have the same compression ratios. The oval port head has 110-cc chambers, and the rectangular port head comes with 118-cc chambers. Open or Closed Combustion Chambers
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WebChevrolet Performance’s Fast-Burn 23-degree cylinder heads deliver maximum performance for Small-Block engines. An aluminum head casting – distinguished by … WebThe heads have 1.94" intake valves and 1.50" exhaust valves with pressed-in 3/8" studs and 76 cc combustion chambers. The water passages are the same as the original 1955 small block Chevy design. These cylinder heads have a twelve (12) bolt intake manifold mounting pattern, six (6) bolts per cylinder head. Oil Pan / Filter / Adapter / Dipstick: domovinski rat pjesme
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WebNov 2, 2010 · Around 10: 1 compression (forged piston/head combo) TRW L2349F pistons. Ported/polished GM 049 oval port heads milled 116 CC. 2.19/1.88 SS valves 3 angle valve job titanium retainers. Com Cams XE274H cam … WebJan 26, 2007 · 13,328 Posts. #5 · Jan 25, 2007. 781 heads are 120 to 122 cc chambers, the 290 are 107 to 110 chambers. 350 hp 396 will not be able to tell the diff. you will loose about 2 points on compression with the 781 head, however you will be less prone to detention with the 781, with the 290 head will make around 10.25 comp with steel shim gaskets ... WebNov 30, 2010 · I have flowed plenty of factory big block chevy heads, so here it goes. 290 & 049 heads have oval ports. 290s are closed chamber, 049s open chamber. They both … domovinskog