Thread: 454 build - what intake and cam ?

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I have read that you can improve flow by 30 cfm by using the larger valves and blending them in with a little pocket work, so yeah, if you have the shekels to spare, I would definitely go 2.19"/1.88".
http://www.summitracing.com/parts/mil-45625-8/overview/
http://www.summitracing.com/parts/mi...make/chevrolet

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Originally Posted by techinspector1

I would definitely go 2.19"/1.88".
http://www.summitracing.com/parts/mil-45625-8/overview/
http://www.summitracing.com/parts/mi...make/chevrolet.

Ok so I have finally got most of the new parts needed to get on with building this engine (courier company in USA lost one package containing $1500 worth of parts and refuse to pay)

Im using the valves recommended above, this cam which was recommended 271-139761 | JEGS High Performance

and that cam requires these springs Crane Cams 99896-16 | Buy Crane Cams Dual Valve Springs at JEGS

What should the valve installed height be with this combination of parts ?

Originally Posted by ceejay

What should the valve installed height be with this combination of parts ?

Crane says 1.900". A trial assembly without springs will tell you where you are, then you can use offset keepers, spring seat shims or whatever you need to set the installed height to 1.900". You don't need any fancy tools to find the installed height, just a 6" machinist's scale held onto the spring seat and measured to the bottom of the retainer. It won't matter a hoot if the scale isn't exactly straight up and down. This first offering on Amazon will work great.....
https://www.amazon.com/s/?ie=UTF8&ke...l_71x2amhyg0_b
1 29/32 nds = 1.90625".....close enough.

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