WebMar 16, 2011 · Steam holes are recommended for all 400 block applications. Use a 400. gasket as a template and drill the three holes nearest the spark plug side of the head … WebFigure 1 - Steam Hole Locations (400 C.I.D. Engines ONLY) Drill three .125” holes in each head using 400 c.i.d. head gasket as a guide. DRILL ONLY THE THREE LOWER STEAM HOLES (closest to the spark plugs) as indicated. Drill straight into the head (90° from the deck) until the drill breaks through into the water jacket (about 9/16”).
Drilling steam holes in sbc 400 heads - YouTube
WebFeb 15, 2009 · 334 Posts. Discussion Starter · #1 · Feb 14, 2009. I have run a street strip small block 400 for 10 years natually aspirated and have always had steam holes in the heads. I am going to be adding a Procharger and about 8 pounds of boost so I went with a Fel Pro MLS gasket (part number 1144). Well AFTER I got 1 head on I noticed on the … WebOct 26, 2006 · Gokou. Steam holes are recommended for all 400 block applications (GM blocks only). Use a 400 Gasket as a template and drill the three holes, nearest the … data center internet providers
Drilling steam holes in block? Aftermarket heads?
WebAug 24, 2011 · C/T SBC Head Cooling Tricks. by SMITHBERGRACING » Tue Aug 23, 2011 10:41 am. I have a friend who races a dirt car and they are having issues keeping head gaskets in their motor. Motor is a Stock 400 block, .040 over, 14:1 compression, 32* timing, good tune on alcohol. Block and heads have both been surfaced and check straight but … WebApr 22, 2011 · The engineers at GM thought the steam holes were needed on Granny's 1975 Caprice Wagon with a SB-400 which had 8:1 compression. I contend, that once you add HP (which is the same as adding heat), the holes are even more needed. You could have steam pockets though your coolant gauge (temp) says everything is fine. WebAug 4, 2016 · With one using a 9/64-inch drill bit and drilling the intake side holes 30 degrees towards the exhaust side of the head, while … data center invest