@Nitrousedstang Not as much as you may think. If it is fed with a dual plane each port with flow a different amount anyway. I try to get my ports as close as I can That is a ton of extra work for probably not much gain if any. Thanks
This is a very detailed review that has more info than I would have guessed. Thank you for all your work Charlie! I look forward to seeing what this does on the engine dyno next!
Hi Charlie i have 2 question Is the big valve always better than small valve and is the air speed important in the intake manifold runner like head port? Thanks
Plenum was sacrificed for OEM hood clearance, IIRC. I could see SOME gain there with height, but that TPI turn is brutal. Hats off to you for making the heavy sacrifices
If hypothetically speaking the top of the intake was cut off and the roof was raised .500 would that gain any advantage on over all flow for the intake ?
If it helps, I’ve taken’140 off J heads and used them, 318 is pretty much the same. Why not 0 deck the block? I’ve done that, with those J heads,used a’557 lift cam, no problem.
Stones are great. Even better if you use the Warren and Brown tools which have the appropriate size pilot as part of the stone carrier. The pilot rotates in the valve guide. Because this is very accurate representation of the valve, you can even do a final face of the stone in the valve refacer so it is the exact angle the valves were faced to, it does a more accurate job than the fixed pilot design. So accurate no lapping is ever necessary.
@@servediocylinderheads No problem. I've used the pilot fixed in the valve guide style all thought out my apprenticeship. Seemed to score all the head jobs and that was a couple times a week (large fleet maintenance). Always lapped them in. It was trade school who had the pilot fixed in the stone carrier style (W&B). They are definitely superior. No lapping necessary. Still available, but not cheap. W&B stuff is top notch.
Charles...off topic, but can you get your hands on some VW cam followers. Even junk ones. 1.18" body diameter. Mushroom lifers. How much material needs to be removed from the mushroom to fit in the lifter bore centers of the 318? Obviously, the lifter bores would need to be opened to fit.
Your work on the Mopar heads was invaluable to a novice like me, really helped clear some points about factory engine head combinations. I'm sure many Mopar garage mechanics appreciate the effort. I have 318 and 273 engines I will be duplicating the head work and single plane intake work that you accomplished in the videos. They will be street engines, 9:1 compression with mild street cams.
I haven’t heard anything as far as updates on the mission impossible…the last I knew Andy and David were going to move forward with it after you delivered everything to David’s. I really hope they plan to follow through with the project.. and after all that work I know you have to be frustrated with that situation Charlie! Technically you surpassed the expectations from what the IOP, flow bench, and well educated hypotheses show-proves that your skillset made this thing a winner…that should give you “some” vindication but for them to shelve this project being only short of confirming the actual results is unacceptable! I can’t think of a more disrespectful way to say thanks to all the people who contributed -especially to you brother! Hopefully that bad outcome is one that would never cross their minds and they have just gotten behind 😏. If only the effort to one up Wiengartner was focused on getting this done…
My brain program wasn't too far off, I remember saying over 600 with EFI, just under 600 with a carb. The computer seems to agree with my nerdification.
Those Promaxx heads are solid heads for the money. There's a guy named tony used to youtube by the name of headbytes porting out of Tennessee. I believe he was one of the guys in development of the Promax heads
@servediocylinderheads hmm it's been a long time since iv watched it. I do remember him at the factory and them scanning and copying his .200 and .300 raised runner ports
Charlie did amazing work and all he could on the mission 318 portion of the project, so thanks for that. I was waiting to finish up my parts soup recipe until after the final Dyno results were in for mission… but if it takes another year, I will just have to risk some mistakes and soldier on.
