[eschaider]

You are right about some of the Coyote engines not using premium SC internals.

Like Ford and because of Ford delivering some n/a vehicles that way, Roush has also embraced cost savers like powdered metal connecting rods on some of the engine offerings. Because of Ford's bean counters continuing efforts to manage high volume vehicle costs downward they have moved away from the Manley H-Beam rod and other components on selected engines.

When you look at the FRPP crate engine offerings you will find three out of the four Coyote offerings use Manley rods and one, the supercharged offering M6007-A50 SCA, uses all supercharged internals. That means 9.5:1 compression blower pistons for the supercharged engine and not the 11:1 pistons of the n/a engines like the OP currently has in his engine.

The other two Coyote offerings (M6007-A50 NAA and M6007-A50 XS) are both n/a packages and also use the higher quality internals including the Manley rods.

What you are doing to someone who didn't buy a Roush package with a warranty, is give him poor build guidance that will more likely than not result in broken pieces and expensive repairs. You bought a warrantied package through Roush. Should your's break you have the Roush warranty to protect you. Should his break he simply has nothing to protect him.

The OP has never run a blown gas engine in one of these cars and obviously has never built a blown gas engine or he would not be asking for help. When someone asks for help he should be steered into safe waters not out into the deep where he can hurt his engine and wallet.

Your arguments about Roush uses this or that are cute internet cheap shots designed to try to win an internet argument. More importantly however they are misleading information for someone who is a first time supercharged engine builder that is going to be standing all alone in terms of warranty protection when he finishes his build.

Because he is on his own, and we don't know what he will use for engine management among a myriad of other things, we collectively should be advising him in a fashion that minimizes the potential for engine and checkbook damage and maximizes the opportunity for a happy ending.

To do otherwise is at a minimum disingenuous and at its worst mean spirited.

To the OP, I stand by my earlier comments about building your engine correctly. Don't take shortcuts, they will hurt you on a supercharged engine especially one with a positive displacement blower. It will cost you a bit more to build the engine correctly but no where near as much as it will cost you if you break the engine you have. When supercharged engines die they are impressive. The angst you will experience just because internet guidance told you, you didn't need the 'good' parts is hard to communicate other than to say it is profound.


Ed