Hello everybody!
My 350 Chevy SB just quit on me: valve stem seals leaking, burnt valves and by the looks of it, eaten valve guides and damaged valve stems.
I am currently thinking to go from a "mild performance" crate engine (that's what it is/was) up to something a little more peppered. nothing fancy, just a little more efficiency for the size.
The general idea is to go with new cylinder heads with smaller combustion chambers (660 to 64cc) and a roller cam that can make the most out of the cylinder heads. The current intake is an Edelbrock Performer EPS and on top sits an Edelbrock 650 AVS2 carb. I would love to keep them, at least the carb.
Here's the camshaft / cylinder head specs as of now:
- Hydraulic flat tappet
- Lift is .450 intake / .460 exhaust.
- Duration at @.050 is 222 degrees intake/exhaust.
- Rocker arm ratio 1,5:1
- Cylinder head type: cast iron 76cc chambers
- Valve size: 1,94 intake / 1,5 exhaust
- Compression: 8,5:1
- cast aluminium pistons (flat)
I would love to get compression up to 9,5:1 at least or even 10:1, but I wonder if this can be achived by just going down from 76cc to 64cc combustion chambers.
For the cam, I want to go with a roller cam that gives good low to mid rpm range torque. The car should be able to pull away fast, but I don't want a street dragster or a street racer that needs high RPM to achieve this.
Anyone got some good leads for me to choose the right parts? Google hasn't been much of help, since many articles are seemingly contradicting themselves. Or I am too stupid to make sense out of it... Either way, any help to get me on track is most welcome!
My 350 Chevy SB just quit on me: valve stem seals leaking, burnt valves and by the looks of it, eaten valve guides and damaged valve stems.
I am currently thinking to go from a "mild performance" crate engine (that's what it is/was) up to something a little more peppered. nothing fancy, just a little more efficiency for the size.
The general idea is to go with new cylinder heads with smaller combustion chambers (660 to 64cc) and a roller cam that can make the most out of the cylinder heads. The current intake is an Edelbrock Performer EPS and on top sits an Edelbrock 650 AVS2 carb. I would love to keep them, at least the carb.
Here's the camshaft / cylinder head specs as of now:
- Hydraulic flat tappet
- Lift is .450 intake / .460 exhaust.
- Duration at @.050 is 222 degrees intake/exhaust.
- Rocker arm ratio 1,5:1
- Cylinder head type: cast iron 76cc chambers
- Valve size: 1,94 intake / 1,5 exhaust
- Compression: 8,5:1
- cast aluminium pistons (flat)
I would love to get compression up to 9,5:1 at least or even 10:1, but I wonder if this can be achived by just going down from 76cc to 64cc combustion chambers.
For the cam, I want to go with a roller cam that gives good low to mid rpm range torque. The car should be able to pull away fast, but I don't want a street dragster or a street racer that needs high RPM to achieve this.
Anyone got some good leads for me to choose the right parts? Google hasn't been much of help, since many articles are seemingly contradicting themselves. Or I am too stupid to make sense out of it... Either way, any help to get me on track is most welcome!