few pointers on the 302 high swirl head. also apply to the last production standard head the 714. although I plan to do a different video once I finish those
Пікірлер: 38
@rayowens4355 Жыл бұрын
Looks pretty good. I am working on a set of magnum heads. I was shocked at the giant guide bosses. They were the first thing I worked on. They look like they were designed by a Ford spy trying to sabotage the competition!
@Doctor_Fromm8 ай бұрын
Свечи надо тоже правильно ставить в 8-клапанном моторе. Стоят все по разному. Открытым пространством к впускному клапану - дает больше крутящего момента на низах. К выпускному - на верхах. Открытым пространством вниз - самое неудачное положение. Пламя распространяется где-то с угла и не успевает разгореться по максимуму в нужный момент. Поэтомум либо открытым пространством наверх или боковое расположение. Его можно регулировать толщиной шайбы, если у купленного комплекта свечей лучшее положение не удается найти у всех цилиндров.
@rogerdodger68882 жыл бұрын
I have a set of 302 I just cleaned up the stock casting. I also cleaned up casting flash in the shrouding around the valves, I see now I should angle them back thank you. suscribed to see future progress.
@black_sheep_fab94112 жыл бұрын
Thanks for the subscription!
@WrecklessEnterainment7 ай бұрын
It’s funny I was like totally clueless and home ported a set of heads for my 318. They were closed chamber 273 heads and I cut the chamber to unshroud the valves, cut down the valve guide, gasket matched to a 340 gasket and put 1.88/1.6 valves in it. So basically everything you recommended lol
@BobF315 Жыл бұрын
I’ve been working on some 302’s. Sleeved and looking to run 8mm magnum valves. 1.92/1.625 Even if it doesn’t need a 1.92 that will give me more curtain at any given lift.
@black_sheep_fab9411 Жыл бұрын
Sounds like a solid setup. The bigger valve should help at lower lifts to some extent regardless.
@chrisgriffin33742 жыл бұрын
Some things are not obvious out the gate....seems like you're on the right track now...because you proved it on a bench.. subbed🤘
@black_sheep_fab94112 жыл бұрын
Thanks!
@juanmangerita7 ай бұрын
Great video! How did the 714 heads turn out ?
@black_sheep_fab94117 ай бұрын
They turned out great. Most of this series is on the 714 but applies to the 302 as well. The 714 was I think the last version of the 302
@juanmangerita7 ай бұрын
Cool thanks @@black_sheep_fab9411
@regalelectrical46342 жыл бұрын
My 302 heads 2 inch inlet , 1.55 exhaust
@archivegarage7638 Жыл бұрын
Thanks for the tips! 3:55 valve shrouding is worse than a GM Vortec but those are also shrouded, I deshrouded the same as you on my 906 Vortec
@firstrespondergarage Жыл бұрын
🚒👍
@terrygrover64402 жыл бұрын
Another good job and you are right what you are saying but did you try back cutting the valves anyway even though that wasn't the problem ? 👍👍
@black_sheep_fab94112 жыл бұрын
Ya I back cut everything.
@terrygrover64402 жыл бұрын
@@black_sheep_fab9411 oh ok back cutting didn't help it at all then , if you don't mind me asking what did you put on it a 30 degree cut ?
@black_sheep_fab94112 жыл бұрын
Ya I believe so.
@terrygrover64402 жыл бұрын
@@black_sheep_fab9411 thanks I was just curious keep up the good work👍
@black_sheep_fab94112 жыл бұрын
No problem man. Anytime.
@Pneumamechanical Жыл бұрын
Nice work! I'm reading forum posts saying early casting 318 blocks, or later casting truck blocks that are said to have thicker walls can be bored to 340 bore, 4.04" do you know if this is true? have you done it? I'd love to build a budget 340
@black_sheep_fab9411 Жыл бұрын
I've heard this before but when actually looking into it I've never found anyone who has actually done it. Only real way to know would be to sonic test one. But I wouldn't bet my house on it
@Pneumamechanical Жыл бұрын
@@black_sheep_fab9411 Thanks, I read a bunch of comments of forums, some guys say they take the bore no problem, others say there's no way. One posted the machine shop that supposedly was building these things all the time, I messaged the shop and they said no 318 can be taken to a 4.04" bore. Thinking about it, I guess a custom crank with 360 mains and 3.31" stroke in a 360 block would be the way to go since the 360 can handle the .40" bore no problem. I'd love to build a cheap 340, but not so sure it can be done
@williamarnett90642 жыл бұрын
Im porting 675’s for my 390 build. Any idea what kind of flow numbers are possible?
@black_sheep_fab94112 жыл бұрын
I haven't messed with any of those. I would think they would be in the ball park of these though. I think 200 plus would be realistic without getting too crazy. But I can't say for sure.
@dwb44622 жыл бұрын
390 cu I would depart from 318 heads and get a set of 360 heads and port those with the stock 1.88" intake or move up to 2.02 valves,,exhaust is already 1.60". If you ran across some 308 heads even better exhaust port. Your gonna want at least 250 cfm on the intake and smog 360 will do that easy
@markgeletzke63282 жыл бұрын
What percentage of your valves are your throats.. There's a reason why bigger valves didn't show improvement, if the throats are stock and you added bigger valves There's a restriction..
@black_sheep_fab94112 жыл бұрын
88 percent. I corrected the throat after installing the valves and had very little gain. The restriction was farther back around the short turn/bowl/guide so the valve didn't do much until I opened it up further upstream.
@dannyskaggs65872 жыл бұрын
Your shop is full of toys
@black_sheep_fab94112 жыл бұрын
1 or 2 lol
@dannyskaggs65872 жыл бұрын
😂 lol
@dannyskaggs65872 жыл бұрын
My old shop look just like that my little girl's at toys everywhere
@dannyskaggs65872 жыл бұрын
Had toys everywhere
@black_sheep_fab94112 жыл бұрын
Whatever keeps em happy! Let's daddy get shit done. Lol
@chrisstavro4698Ай бұрын
This is where the flow bench lies to you. Unshrouding that intake does nothing good for you. With that low flow gasket matching and widening the pinch point are counterproductive as well. Pitot tubes show you where material can come out.
@black_sheep_fab9411Ай бұрын
@chrisstavro4698 please explain how deshrouding and increasing flow is counter productive? You belive a turbulent port that flows 30 cfm less would produce more horsepower than this?
@chrisstavro4698Ай бұрын
@@black_sheep_fab9411 Getting rid of turbulence inside a port is a good thing. That wall that "hurts" low lift flow is there to increase swirl, which helps combustion, response, and fuel economy. That stuff doesn't show up on a dyno, but it's very obvious as soon as you start driving. If you can produce positive swirl at all lifts without it, go ahead and remove it. For the sake of argument, 20 cfm with the wall will make more power everywhere than 30 cfm without the wall.