Which is better for a fr30 cam ,10.5 to 1 45.7 inlet valve with std ex valve with twin 40,s
Ashley 2in with 1inch 1/2 primarys OR
Ashley 2in 1/4 with 1inch and 3/4 primarys
Cannot find a 1in and 5/8 as suggested by RWD thread
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Which is better for a fr30 cam ,10.5 to 1 45.7 inlet valve with std ex valve with twin 40,s
Ashley 2in with 1inch 1/2 primarys OR
Ashley 2in 1/4 with 1inch and 3/4 primarys
Cannot find a 1in and 5/8 as suggested by RWD thread
I’d say stick with Ashley 2” inch
the smaller bore ashley stuff will do just fine :)
The small tube (complete welded, not slip in) manifold is far the best for lower power engines. It will give more torque. Even on engine round 170 Bhp, they are still competitive against the larger bore because of the extra torque at lower RPM. Despite it does start to choke the power at this point but don't expect more than 2 or 3 Bhp gain by using big bore at this level.