My 454 Rebuild

[Spareparts]

Yes i know they are not beehive. They are stock 24 year old 140K springs

 

[Supercharged111]

Yes i know they are not beehive. They are stock 24 year old 140K springs

My stock springs were beehives. I don't think those are stock springs, especially when you see they don't fit the retainer properly.

 

[Spareparts]

My stock springs were beehives. I don't think those are stock springs, especially when you see they don't fit the retainer properly.

Actually now that i think about it these heads are off a core engine i bought. At some point the heads had been rebuilt. They were pretty clean and had heat tabs on them.
Only way i know of to get heat tabs is when they get rebuilt. Probably some auto part store specials.

 

[454cid]

Random pics

Did you do the painting or the shop? I wonder why the machined flat areas on the front of the block were masked. Were the valve covers in rough shape? I often see picture of them quite corroded, with missing paint, but mine didn't do that.

 

[Spareparts]

Did you do the painting or the shop? I wonder why the machined flat areas on the front of the block were masked. Were the valve covers in rough shape? I often see picture of them quite corroded, with missing paint, but mine didn't do that.

I painted it and i don't really know why i masked off the machine parts where the brackets rest other than i was masking for the timing cover/water pump and got carried away.
Valve covers were horrible with flaking a corrosion. Better now but still no great.

 

[Spareparts]

So it looks like this is the stuff i need for a Valve spring upgrade. Valve spring locators will be X16

COMP Cams 26120-16 COMP Cams Valve Springs | Summit Racing

Free Shipping - COMP Cams Valve Springs with qualifying orders of $109. Shop Valve Springs at Summit Racing.

www.summitracing.com

COMP Cams 4698-8 COMP Cams Valve Spring Locators | Summit Racing

Free Shipping - COMP Cams Valve Spring Locators with qualifying orders of $109. Shop Valve Spring Locators at Summit Racing.

www.summitracing.com

COMP Cams 795-16 COMP Cams Steel Valve Spring Retainers | Summit Racing

Free Shipping - COMP Cams Steel Valve Spring Retainers with qualifying orders of $109. Shop Valve Spring Retainers at Summit Racing.

www.summitracing.com

Anyone have any advice?

 

[Spareparts]

I think here is the cam i am going to go with. Computer friendly and slightly better than stock.

Chevrolet Performance 12552296: Hydraulic Roller Camshaft Big Block Chevy - JEGS

Get the Best Performance with Chevrolet Performance Hydraulic Roller Camshaft Big Block Chevy 12552296 parts at JEGS. Shop Now at the Guaranteed Lowest Price!

www.jegs.com

 

[Supercharged111]

I think here is the cam i am going to go with. Computer friendly and slightly better than stock.

Chevrolet Performance 12552296: Hydraulic Roller Camshaft Big Block Chevy - JEGS

Get the Best Performance with Chevrolet Performance Hydraulic Roller Camshaft Big Block Chevy 12552296 parts at JEGS. Shop Now at the Guaranteed Lowest Price!

www.jegs.com

That's not bigger than stock, but it does have a tighter pattern.

 

[Spareparts]

Yeah, nothing special but it is slightly better than stock + it is GM and i would trust it with the higher valve spring pressure of the new springs over the Engine Tech cam.
As near as i can tell and that is not much. MY
DCR will be close to 8.06
Static compression will be 8.73
Cranking compression will be 193.29.
This assumes i have the numbers right in the first place
Cam # 12552296 measured
@ 0.050
ID 206
ED 211
LSA 118
ICL 115.5

IVO -12.5 BTDC (- indicates ATDC)
IVC 38.5 ABDC
EVO 46 BBDC
EVC -15 ATDC (- indicates BTDC)
ECL 120.5
Overlap -27.5

Also, if you look at post #77 you can see the effn valve spring is upside down. I found 6 all together and this was from a supposedly reputable machine shop!.

 

[Supercharged111]

So they are stock springs after all, I see his neighbor fits the retainer properly.