Edelbrock C26 or tunnel ram??

[raj4851]

I'm upgrading my cam choice in my 355. I have flat tops, double hump heads, stock crank & rods. I intend to get a Crane110921 cam and go back with two fours, AFBs. I had the carbs on an Edelbrock C26 but I also have a Weiand tunnel ram that I'm itching to try. This is in a '39 Ford street rod with a Super T10 and 4.10s. It's for street use and "fun". What do you think? Thanks in advance, Rod

 

[Indycars]

Just posting some reference info. The only difference in the two CR calculation are the valve relief size of 5cc and 10cc.

 

[grumpyvette]

the chart posted above makes me think youll be just fine with that cam/combo, Ive used that cam in several old school engine builds and it makes really good hp in the 3500rpm-6700rpm power band in most cars, if the heads breath fairly well, its got a fairly tight LSA so its going to lope noticeably and not run great at idle, but youll see it kicks in rather well once it gets above about 3500rpm where its designed to run and that over lap starts helping the smaller ports to breath, if you find the engine gets into detonation easily retard the cam 4-to-6 degrees it will move the whole power curve up only about 200 rpm but reduce effective cylinder compression by holding the intake valve open a bit longer


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