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Topic Review (Newest First)
05-23-2013 08:56 PM
ChevroletSS Hey guys I'm looking for a timing chain cover that will work with a roller cam/ double roller timing chain on a 94 roller block. I don't want any plastic covers. Any help please
05-02-2013 02:56 PM
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.
04-28-2013 03:52 PM
bygddy Undecked stock block, comp is 9.85 using 0.041 gasket.
04-28-2013 02:52 PM
0trbo4myCHEVUICK
Quote:
Originally Posted by ChevroletSS View Post
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.
04-28-2013 01:16 PM
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
04-28-2013 08:23 AM
bygddy
Quote:
Originally Posted by 1Gary View Post
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.
04-28-2013 04:49 AM
1Gary Summit or Jegs doesn't make heads-they are from a jobber.Go figure huh.
04-27-2013 08:37 PM
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.
02-20-2013 11:36 PM
Landshark928
Quote:
Originally Posted by ChevroletSS View Post
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.
02-20-2013 10:55 PM
Choctaw Bob
Quote:
Originally Posted by ChevroletSS View Post
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
02-20-2013 10:27 PM
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
02-20-2013 08:25 PM
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..
02-17-2013 09:18 PM
vinniekq2
oil pressure at idle,,,

Quote:
Originally Posted by barry425 View Post
Small Block Chevys seem to run okay as long as they have 40 psi at hot idle. I had a machinist make a mistake on a crank once, and the hot idle was only 25. It went downhill little by little, and by the end of the month only had 10 psi at hot idle. I gave the machinist Hell over that and also gave him some not-so-good PR. Some speed shops took my word for it and took their business elsewhere after that.
.
Small Block Mopars like higher oil pressure, such as 60-80 psi at hot idle. It is because of the way the oil passages route inside the block. There is a fix that involves putting an oil bypass line in the valley, but I don't like doing that. If anything breaks, you can't see it until the engine goes south on you. I still remember the external copper top end oil line on the old "Y" block Fords that would work harden and break. Oil went everywhere. What a Mickey-Mouse outfit that was. "Have you driven a Ford lately?" lol
how is that possible? I would think that on a test fit that the crank was measured? The mistake on the crank ,,,how did that get missed by the guy assembling?
02-16-2013 12:05 PM
barry425 Small Block Chevys seem to run okay as long as they have 40 psi at hot idle. I had a machinist make a mistake on a crank once, and the hot idle was only 25. It went downhill little by little, and by the end of the month only had 10 psi at hot idle. I gave the machinist Hell over that and also gave him some not-so-good PR. Some speed shops took my word for it and took their business elsewhere after that.
.
Small Block Mopars like higher oil pressure, such as 60-80 psi at hot idle. It is because of the way the oil passages route inside the block. There is a fix that involves putting an oil bypass line in the valley, but I don't like doing that. If anything breaks, you can't see it until the engine goes south on you. I still remember the external copper top end oil line on the old "Y" block Fords that would work harden and break. Oil went everywhere. What a Mickey-Mouse outfit that was. "Have you driven a Ford lately?" lol
02-16-2013 11:54 AM
ap72
Quote:
Originally Posted by barry425 View Post
As far as oil pumps go, I always take them apart before brazing the pickup to the pump. Also, I take the spring out and replace it with the Corvette spring. I get 60 psi at hot idle and no fluctuation (because of the big block pump having more flutes on the gears). The big block pump also is equal to the small block high volume pump.
As far as bearings, I use Clevite 77 on a hardened, stock (not reground), or nitrided crank. I use aluminum bearings on a crank that has been ground and not re-hardened or nitrided.
Glad to see someone besides me likes to have decent hot idle oil pressure. I've been getting getting burned at the stake for using HV oil pumps, but it really makes a difference in bearing wear, especially when you'll be running it at low rpm (like a street car).

I also use King bearings exclusively now, nothing against Clevite, I just think King is better.
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