How far in the hole 318 pistons
How about searching out an '89 - '91 roller 318, or the earlier '86 - '88 roller 318?
The generation of 318 Roller Cam engines all came with the flat top pistons .040 ths down in the hole at 9.2:1 c.r. stock without even having to touch them.
With the factory 302 Closed Chamber heads with the large push rod holes, because the roller lifters sit higher and the pushrods need more room to swing in the heads.
Thin Mr. Gasket 1121 head gaskets at .028 ths compressed are available also.
Here is an '89 date coded 318 roller short block.
302 closed chamber heads.
Want a long snout roller cam (or the cam snout adapter). I currently have an '89 Truck with the roller 318 that came with the factory long snout roller cam, fuel pump eccentric and proper timing chain cover to mount the mechanical fuel pump to.
Got lucky on this one, as it had a fuel pump block off plate on the timing cover with all the good parts inside.
Surprisingly the factory roller cam performs quite well with the added 4 barrel carburetor, giving the engine the fuel it needs to perform. Factory valve train with the stock factory valve springs made for the roller cam allows higher rpm without the valve float.
If you go with a high lift roller cam, then you are going to have to re-engineer the valve train and springs.
Up to you... this has successfully worked for me. I am not a racer, but do enjoy a good running street driven vehicle with the added performance of the 4 barrel and the secondaries.
Good Luck with your projects.
☆☆☆☆☆
How about searching out an '89 - '91 roller 318, or the earlier '86 - '88 roller 318?
The generation of 318 Roller Cam engines all came with the flat top pistons .040 ths down in the hole at 9.2:1 c.r. stock without even having to touch them.
With the factory 302 Closed Chamber heads with the large push rod holes, because the roller lifters sit higher and the pushrods need more room to swing in the heads.
Thin Mr. Gasket 1121 head gaskets at .028 ths compressed are available also.
Here is an '89 date coded 318 roller short block.
302 closed chamber heads.
Want a long snout roller cam (or the cam snout adapter). I currently have an '89 Truck with the roller 318 that came with the factory long snout roller cam, fuel pump eccentric and proper timing chain cover to mount the mechanical fuel pump to.
Got lucky on this one, as it had a fuel pump block off plate on the timing cover with all the good parts inside.
Surprisingly the factory roller cam performs quite well with the added 4 barrel carburetor, giving the engine the fuel it needs to perform. Factory valve train with the stock factory valve springs made for the roller cam allows higher rpm without the valve float.
If you go with a high lift roller cam, then you are going to have to re-engineer the valve train and springs.
Up to you... this has successfully worked for me. I am not a racer, but do enjoy a good running street driven vehicle with the added performance of the 4 barrel and the secondaries.
Good Luck with your projects.
☆☆☆☆☆