Search Results for ‘compression’

I've always heard that the max variation between cylinders should be 15%. I've got a '54 MG with three cylinders at 150 and one at 125 that pumps up to 145 with oil. I'm guessing a broken or worn ring. This engine makes a whopping 57 hp and it's driven slow and easy and not very often -...

I'm building a 327 and have some good forged 350 Pistons with about a .125 dome. I'm using a 5.7 rod and know the piston will be in the hole but was hoping the dome will make up for it. The heads are 66cc chamber and have been milled a bit but don't know how much for sure. The block has been...

I'm building up the 350 in my truck, and I'll list the specs below, but the real question is: can I run 9.23:1 compression on 87 octane unleaded with .040" quench distance without detonating? P.S. I will not change my heads to vortec, don't try to convince me, and my cam choice is staying too...

Hey guys! For better or worse I'm moving from my 400sbc to a gen V 454 I plan to stoke to a 489(or there abouts). with my 400 I could afford aluminum heads off the back so I ran 9.3:1 compression with 10 pounds of boost on a intercooled centrifugal no problem. I don't have the casting...

I recently bought a spare 400 engine for my 71 Grand Prix, an L78 with the 6X 8 heads which have large D shaped combustion chambers. It has 7.7 CR, Jimmy Carter era low compression, and I want to bump it up to the low 9's and put a medium cam in it for some perfomance. I wonder if this is a...

I have a 350 sbc in a 1979 camaro with a close ratio 4 speed manual with 308 posi. The engine not quite sure on the cam size but it has 882 heads, performer intake, 1" carb spacer and i have either a holley 600 or carter AFB, long tube headers with true duals only 2.25" exhaust. My question is...

Pulling an engine out of an salvage yard (Big Block Chevy) I understand how to do the test. assuming the engine is warm/hot But What are numbers i should look out for? What is considered red flag and what is not? What is are good numbers? and if the cylinder(s) has low numbers does that...