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[cobrasc1966]

NAF 427 replica that I've owned since I built it in 1986. 429 CJ with a Toploader. Lunati Voodoo cam, Offy intake, 780 Holley, Accel / MSD ignition, Flowkooler water pump, Cloyes double roller timing chain. 9" Ford 4 link rear with 3.50 Detroit Locker.

[raybones]

I recently bought Superformance SP02290, she was built around 2005/2006 and has a 460 block. I've been told it is a 545 stroker, but I do not have any paperwork to verify that.

It has aluminum Super Cobra Jet heads, a Ford M-9424-429 single plane intake manifold, and a 770 CFM Street Avenger Carburetor. I've also been told it has a solid lifter camshaft, but do not know that for sure.

It also has a 12" oval air filter. That seem VERY small for this size engine. What are you folks running?



Ray

[Unique427]

Congratulations on your purchase.

Based on the usual 12" x 8" oval pattern,
it's sufficient if the filter is at least 2-1/2" tall.

For a 2-1/2" tall oval described above, the power penalty is
about 2HP from that engine at 4000 RPM and 5HP at redline.

770CFM carb seems kind of small for a 545 but I'm sure
it's fine for street and if you're not going to hammer the throttle
past 5000 RPM. Someone smarter then me will come along to advise.

[Gaz64]

Lovely car Ray.

A 770 is only good for about 5000, so depends on the camshaft and the rest of the engine combo as to how hard the engine can spin.

Perhaps you post a video of the engine idling, and/or under load from 2000 up?

With the restricted air cleaner size, you need the best/less restrictive filter media.

Once you are used to the power, a larger carburetor might be in your future.

Gary