42 cfm gain @ .500. That's very good! Mild street engines are typically around .500 lift. Those heads would make a fantastic, little street engine! Probably, hurt some feelings!😃
Good numbers. The J heads can achieve 270. The z can get up to 290. The exhaust flow is your limitation on ultimate power output. 2.4 hp/cfm is good. But with the exhaust power output would be limited to 2.0-2.2hp/exhaust cfm. The j head flowing 270....max effort with 12.5:1 compression and tunnel ram can make 550hp. The exhaust holds it back. Lots more flow available on the z heads Charles. Can you get 290?
No, this is as far as these heads go. Now if someone bought them from Rob and wanted me to do them up that would be cool. They need guides. Good info and thanks Tom.
2:00 Its not 'chunky' but it looks like the air is fanning out more, which, if one is looking at fuel mixing and vaporization, this seems like its capable of breaking up droplets better.
Great work on the cast iron, and 250 cfm can support 500 + HP. Do you have any videos on sbc swirl port head porting? Would be cool to increase the flow on those while maintaining the swirl. 220 cfm out of a set of the above would be great for a 425 HP stump puller! Perhaps a sbc 400 block with a sbc 307/327 crank to get just over 350 cubes. Short strokes like smaller cc runners, helps to fill the cylinder more efficiently. Cool videos.
Headbytes made a video about porting the 193 swirl head. However, many people said he committed fraud. I used to have a 1990 Chevy Silverado, and sometimes I think about TBI engine tricks. I wondered what a 383 stroker and roller cam could do.
With and average 285 cam 240@fifty 10:1 cr 1.8-1.9 hp per cfm which seems an average 1.15-1.3+ lbs-ft per cid type build gets, so like 450-480 hp, A more max effort guessing 2-2.3+ hp per cfm.
Eric Weingartner has a program where you send him a head and he flows it and critiques it. I am not doing that at this point. I would do it for local guys. Thanks
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
This was not a waste of time, all the information is very valuable , thanks very much Charlie.
You are welcome.
Your work is EXCELLENT!
NEVER a waste!
If I had heads I needed porting, I would gladly send them to you!
Thanks Hunny Bunny! Wiffy would like that.
Thanks for all the sb Mopar content! Can't wait to see what Rob does with some of this stuff.
Chryslerfile from Australia watching :) loving all the LA motor content!
Glad you like it.
Last video I predicted 245-250 with no epoxy! You got the most that you could get for the least labor. Great job!
Quick and painfull!
@@servediocylinderheadsno pain no gain! 😂😂
@@Patrick-xd8jv It hurts!!!
Definitely not a waste, cheapest horsepower on the market, I would be interested to see what the numbers with the guides cut down are
Nice work! If I could have gotten my J casting heads to do this, I probably would have kept them instead of going with W2’s
Thanks, these will move some air with some development work. But that isn't happening on this pair. Rob may sell these.
Starting to look like a Stradivarius instead of a fiddle . You're an Artist Man; r should I say Artisan ! Ciao Baby 😎
He was Italian you know... thanks! Iron sculpturing?
@@servediocylinderheads All the best stuff is .
@@Jim-ic2of RUclips some Ferrari engineering videos. They are nuts. I like it.
@@servediocylinderheads I still dig Pantera !
@@Jim-ic2ofCowboys from hell
42 cfm gain @ .500. That's very good! Mild street engines are typically around .500 lift. Those heads would make a fantastic, little street engine! Probably, hurt some feelings!😃
That is the plan. Thanks
Shows if you know what you are doing you can get some fast big gains!
I am sure someone who knows could!
Good numbers. The J heads can achieve 270. The z can get up to 290. The exhaust flow is your limitation on ultimate power output. 2.4 hp/cfm is good. But with the exhaust power output would be limited to 2.0-2.2hp/exhaust cfm. The j head flowing 270....max effort with 12.5:1 compression and tunnel ram can make 550hp. The exhaust holds it back.
Lots more flow available on the z heads Charles. Can you get 290?
No, this is as far as these heads go. Now if someone bought them from Rob and wanted me to do them up that would be cool. They need guides. Good info and thanks Tom.
Wow! Very nice!
Thanks!
2:00 Its not 'chunky' but it looks like the air is fanning out more, which, if one is looking at fuel mixing and vaporization, this seems like its capable of breaking up droplets better.
I think you are right. Thanks
Great work on the cast iron, and 250 cfm can support 500 + HP. Do you have any videos on sbc swirl port head porting? Would be cool to increase the flow on those while maintaining the swirl.
220 cfm out of a set of the above would be great for a 425 HP stump puller! Perhaps a sbc 400 block with a sbc 307/327 crank to get just over 350 cubes. Short strokes like smaller cc runners, helps to fill the cylinder more efficiently.
Cool videos.
I have a few swirlies coming. Stay tuned.
@@servediocylinderheads
Sweet, can't find that info anywhere else, thanks.👍 Second thumbs up.
@@itseithergonnaworkoritaint7852 I will change the idea that swirlies are boat anchors!
Headbytes made a video about porting the 193 swirl head. However, many people said he committed fraud. I used to have a 1990 Chevy Silverado, and sometimes I think about TBI engine tricks. I wondered what a 383 stroker and roller cam could do.
@@skylinefever I remember that. If you read the comments I was telling him what to do on those heads! I worked them in the 80's!
With and average 285 cam 240@fifty 10:1 cr 1.8-1.9 hp per cfm which seems an average 1.15-1.3+ lbs-ft per cid type build gets, so like 450-480 hp, A more max effort guessing 2-2.3+ hp per cfm.
Thanks!
250 @ .500 is nice! I always heard that if you double the intake cfm, that number is a reachable hp target. Probably more?
If you do it right? Yes.
I think that would make about a 535i horsepower 340 maybe add some stroke and a really good camshaft
Not bad at all.
👍💪
I think you should give it more cutting and compare the brodix head
Which Brodix?
@@servediocylinderheads b1ba mc
@@servediocylinderheads then there's Shannon spec ones
I realize you're a busy man, but do you flow heads that are sent to you? I have a set of 318 heads I would like to know how well I did.
Eric Weingartner has a program where you send him a head and he flows it and critiques it. I am not doing that at this point. I would do it for local guys. Thanks
@@servediocylinderheads Okay, thanks for the reply! I'll check out Eric.
@@Tshade67 If you are local I will take care of you. No problem.
@@servediocylinderheads Unfortunately I'm in Missouri. Thank you though.
Keep up the great work!
What are your thoughts on a back cut on the exhaust valve with anti reversion headers?
I don't use a backcut on exhaust valves for just that reason.
You meant X head?
Z head
X head
@@MP-pz9oe z head
@@servediocylinderheads The Y head surpasses them all, but VERY rare…
I Rekon i could get you 500 horses with your 1 hour quick port Z heads on a 318 or 360 based motor. No Port Filler though
Not bad for a true streeter.