GT40X Ford Racing cylinder heads, 2nd cut, Fox body project

[@luckyPiston]

They're going on a mid size motor, you have them flowing better than a mildly reworked Chevy Vortec with decent swirl taboot , considering what they were , definitely a win !

[@servediocylinderheads]

@@luckyPiston Thanks

[@ericsmcmahan]

Good video. I didn't expect the short side velocities to pick up that much. Impressive

[@servediocylinderheads]

@@ericsmcmahan Thanks. Ssr goes into transistion at pretty low lift.

[@juhanahuovinen]

😀👍 -juhana

[@brokentoolgarage]

Getting there. I saw somewhere in an article they gained 100hp from heads and 1.7 rockers on a stock 5.0 over e7. I still have not found any flow data on an E6 head. Maybe I will be the first person to test them when I build my bench 😀

[@servediocylinderheads]

@@brokentoolgarage I did some e5 or e6 heads a while ago. Thanks

[@brokentoolgarage]

@@servediocylinderheads I think those were E5. E6 has the "swirl" closed chamber shrouded valve design. Most Ford people get a knee-jerk reaction when you say E6 lol

[@servediocylinderheads]

@@brokentoolgarage ok, those flow bad and have different length valves

[@brokentoolgarage]

@@servediocylinderheads I think you are right on the valves. My question is how bad - my guess is slightly worse than E7 bad due to valve shrouding

[@servediocylinderheads]

@@brokentoolgarage Yep

[@garykarenmcgruther6386]

Time to play with some Clay to make a vane on the floor near the short side on the intake port.

[@servediocylinderheads]

@@garykarenmcgruther6386 Not for this application! You are not wrong. The ssr could use help. Thanks

[@andrewburlock2653]

Hi Charlie. If you haven't done it already could you do a tutorial video on flow balls and what they are telling you. Thanks. Andrew

[@servediocylinderheads]

@@andrewburlock2653 I have done that. I am sure. Thanks

[@rolandotillit2867]

I'd say that intake is right on the edge, try to get more out of the exhaust, stick a high overlap cam that'll still pull vacuum and enjoy ~430hp at the crank.

[@servediocylinderheads]

@@rolandotillit2867 On the edge of what?

[@rolandotillit2867]

@@servediocylinderheads Of how much you can get out of it before you start hitting diminishing returns. I'm sure you can get more flow out of the intake, but I wonder if putting all that time would be worth it, when you can make bigger gains on the exhaust side for the same amount of time invested. If you can get 3-4 cfm extra on the intake side, is that better than getting 5-6 cfm extra on the exhaust side for same time invested? Ideally you want both, but if you had to choose.

[@servediocylinderheads]

@@rolandotillit2867 Interesting question. I would need to look at the ratio closer. Thanks

[@panthermadness4232]

Id still rather have your E7s for somethjng on the street..i cant see needing to use an extreme amount of lift to see the cfm gains. Maybe an average air flow comparison to say .500 lift between the two?

[@servediocylinderheads]

@@panthermadness4232 I would need to find an old E7 flow sheet! Thanks

[@gordonborsboom7460]

If you don't polish the short side radius, is fuel more likely to stick to the rougher floor versus a polished SSR? This is my assumption about your statement Please expand my knowledge! Also, do you flow Dychem only at max lift of the intended application?

[@servediocylinderheads]

@@gordonborsboom7460 athe rougher texture makes for a thicker boundry layer. As far as what the flow does different between polished and rough I can say I like what I see in chamber and cylinder with polished ssr

[@servediocylinderheads]

@gordonborsboom7460 Usually fuel puddles into drops or droplets better on a smooth surface. The ssr is challenged due to high airspeed drops would have a tough time on ssr. Thanks

[@gordonborsboom7460]

@@servediocylinderheads I appreciate the info. Thumbs up 👍