[jim_howard_pdx]

Sorry to disagree with everyone on this post....

I do not do this to be a pain in the a s s.

If you want maximum horsepower and torque, you need equal power produced on each cylinder, or at least as even as you can make it.

FORD EFI s u c k s. Sorry but it is true. In fact ford small block head configurations are back a s s w a r d to the way they should be designed.

Ford uses stupid cylinder head configuations that chevy and chrysler have figured out back in the 1950's. If you use an x intake configuration you get more even power produced at each cylinder and that builds the best power.

On Fords, we suffer in that the corners are way longer runs than the center 4 cylinders. Now on that FORD EFI intake, you have air that almost reaches the speed of sound trying to make bends, cuts, and dodges to reach all 8 runners. That is why cylinder one rarely gets enough air at high rpm. So that cylinder runs rich. Too much fuel, not enough air.

To fix this, there is nothing more effective than to "extrude hone" both the upper and lower intakes. Have them port these to the maximum they can go.

The Edelbrock Victor and the Trick Flow intakes do a much better job of feeding that number one cylinder with air, and in setting your torque curve higher to build more horsepower at upper rpms.

All the ford and cobra intakes are tuned WAY LOW for maximum power production. But hese pieces will be greatly improved by extrude honing as well.

Extrude honing is like a super polish job. It takes a goopy mess of carbide clumps and drags them through the ports. This scrapes them from the inside out, and smooths the contours that provides for optimum air flow at high rpm.

Extrude honing does a better job than hand porting or hand porting plus cnc work.

When running a carb, I like to port the unit, then shot peen the unit to establish the "casting" finish that keeps fuel from "sheeting" on the metal. At high rpms these sheets break free and cause all kinds of bad rich/lean cylinder problems that rob the engine of torque.

Hope my long explanation makes sense. Extrude honing works for two reasons. One, it cuts or hones in a way that mimmicks how the air needs to flow as it approaches the speed of sound. Second, it ports smoothly and effectively areas that hand porting and cnc do a poor job cutting.

Extrude hone, and keep the surface brightly POLISHED! You will be very pleased with the results.