[vinniekq2]

quality is one part,air flow is the other.
when you build an engine you plan the power from what the heads can flow and match the rest of the parts

[Choctaw Bob]

Originally Posted by ChevroletSS

Gotta question for ya guys... I was looking to get the AFR 195cc street heads but seen that jegs and edelbrock have their own 195cc heads with 64 cc at a lower price. The way I see it if they all have the same specs will they all give me the same results. If I can get a pair a little cheaper I will as long as I get the same result but not sacrificing quality taking in consideration that jegs and edelbrock are good brand names and have a good reputation.

Thanks guys for the help..

195 cc is how much volume the intake port will hold. This is a common way to base line compare the heads so you can size them for the intended use. Between two different brands of 195 heads they can be completely different in port shape and air flow volume at each RPM range with comparable conditions. I wouldn't buy heads on port volume alone. You should know flow rates and compare dyno runs with other components similar to what you intend to run and suiting your intended purpose.
It's pretty easy to buy cheap and in the process throw your money away. I know, I've done it enough

[Landshark928]

Originally Posted by ChevroletSS

Gotta question for ya guys... I was looking to get the AFR 195cc street heads but seen that jegs and edelbrock have their own 195cc heads with 64 cc at a lower price. The way I see it if they all have the same specs will they all give me the same results. If I can get a pair a little cheaper I will as long as I get the same result but not sacrificing quality taking in consideration that jegs and edelbrock are good brand names and have a good reputation.

Thanks guys for the help..

They are far from having the same specs. Summit heads are solid for the money. What are your HP goals? What cam do you have? The AFRs have more peak and mid flow than either the Jegs or Summit heads.

[ChevroletSS]

hey guys gotta piston ring question. Im trying to figure out if my gap is correct. The paper that came with my rings says that when the rings are compressed in the grooves that they should not stick outside of the grooves. Is this all I need to look for or go by or whats the process I need to do.

[1Gary]

Summit or Jegs doesn't make heads-they are from a jobber.Go figure huh.

[bygddy]

Originally Posted by 1Gary

Summit or Jegs doesn't make heads-they are from a jobber.Go figure huh.

Summit heads = brodix IK180's or IK200's
Jegs heads = Pro-filer
Had my hands on both kinds and bought Pro-Filer for my own.
Nice pieces either way.

[ChevroletSS]

Im need some help getting an idea what my CR is. Every calculator I use keeps giving me 1.39:1 and I dont know what Im doing wrong.

Bore: 4.030
Stroke: 3.75
Chamber cc: 64
Gasket Thickness: .045
Head Gasket Bore: 4.060
Piston to deck height: 9.025
Piston volume:-12cc

I DONT HAVE A HEAD GASKET YET I HAVE BEEN TRYING OUT DIFFERENT NUMBERS TO SEE WHAT WORKS BEST. i ALSO AM GUESSING ON THE GASKET BORE

[0trbo4myCHEVUICK]

Originally Posted by ChevroletSS

Im need some help getting an idea what my CR is. Every calculator I use keeps giving me 1.39:1 and I dont know what Im doing wrong.

Bore: 4.030
Stroke: 3.75
Chamber cc: 64
Gasket Thickness: .045
Head Gasket Bore: 4.060
Piston to deck height: 9.025
Piston volume:-12cc

I DONT HAVE A HEAD GASKET YET I HAVE BEEN TRYING OUT DIFFERENT NUMBERS TO SEE WHAT WORKS BEST. i ALSO AM GUESSING ON THE GASKET BORE

Your piston to deck height is not 9.025
More like .025 depending on piston compression height and block deck height.
And chances are your running a DISH piston not a dome top, so you would need to enter +12cc for piston volume.

You need to measure piston to deck with a straight edge and feeler gauges at least, if you don't have proper tools.

[bygddy]

Undecked stock block, comp is 9.85 using 0.041 gasket.

[ChevroletSS]

Ya I messed up the deck height according to my dial indicator is .021 but Im guessing that might be around that. and they are dished with a stock deck height. 9.8 would be nice but might want to go lower for pump gas.

Thanks guys for the help I knew I F ed up somewhere.