I see you port single plane intakes for drag racing. Would a street duel plane intake benefit from porting? Would it improve acceleration from light to light street racing?
Except somebody was running a carb spacer in the first place, i doubt much. Unless... the cam wanted to be at home in a higher rpm range anyway. Adding plenum volume dampens pulse flow/signal anomalies [alongside reduced velocity before the turn], which is what forces powerband range up. On an engine that copes with a fair amount of reversion the extra volume can be a good thing - or not. This is a serious manifold - something destined for 7k+ rpm I would think. What I missed is how big a motor he typically finds this manifold gets put on? I can't imagine anything smaller than 418, but... many out there more clever than me.
I've been looking for a company to do some work on my intake manifold such as raising the port roof and mild porting . All I find is wilson manifold In Florida. Anyone else out there ??
The burr finish saga. I grant that it may help keep suspended better in some applications, but it may just be that the ducting in those applications may be too large and/or improperly tapered. The test someone should do is to dyno using burr and smooth finishes and alter fuels. Use propane(C3H8) or methane (CH4). If there are no changes from using gaseous fuel, but changes using liquid fuel, then search for the mechanism. Performing experiments accurate enough to separate signal from noise isn't easy, but it should be done.
Saw on the tube a video with good headporter testing a 60 grit to burr finish on a BBC. The burr finish had 20 hp more. ( dont recall everywhere or specific rpm). Then he yook the heads and changed back from burr to grit 60... He lost the 20 hp. Then got the heads of again and he used a longer aluminium burr which he bent a bit on purpose to create an even rougher burr finish. That picked up 25 hp. 5 hp more then the normal burr finish. So he stated clearly that shape of ports was more important then a mirror like finish on a BBC. As professional head porter I have seen everything in between working best: mirror like finish on sbc to ultra rough on BBC all back to back tested. But also in compact sport cars where grit 60 produced 5 hp more then the requested grit 120 by customer ( for the nice looks..) to also mirror finish of motorbike ports.. Generally the lower the velocity in the intake port....the rougher the finish... But exceptions ...I have seen a lot......
Your obviously a man who takes pride in his craftsmanship. Finishes on intake manifolds and intake ports of heads has been a topic of conversation for many years. I agree it’s hard to find someone who has dedicated the time and resources to test his finished products using a logical fair process. There’s just so many variables to consider. Richard holdener on you tube does a lot with the LS turbo applications. Thanks for sharing you information.
Is there a list somewhere showing how to figure out your areas for intakes and cylinder heads needed for a given combination? I know there's some you have to pay for but hard to justify when you build one engine ever few years
Why does Edelbrock/BMP cast their Dominator manifolds that way? (with the cloverleaf flange) First thing I did to my 2970 Edelbrock was bolt it to the Bridgeport and mill the flange out similar to yours.
Eric I would like to see a comparison between the burr, smooth and the golf ball or crater surface bottom and see the performance differents. Great videos Eric and thanks for passing on your help and knowledge.
5HP is 5HP!! Lol. Just found your channel, I’m enjoying your content. I’m gonna be porting the outside of the intake for better flow/looks, looking for some big power gains.
Loads of useful knowledge here, from a professional at that !! Not some slob in his shed with a Harbor freight angle grinder. You're willingness to share your info is much appreciated Eric. Thank you !
The debate over surface finish rages on. Personally, I prefer the rougher finish....but I can see it being a crutch as well. By polishing the sides and roof, increasing the boundary layer, you're in effect making the runner "Act" smaller. So if the runner is in fact too big for that particular application, then the smoother finish might pick it up. Everything is application specific.....everything... And like everything else, everyone has their own opinions. Darin Morgan has done a couple podcasts on the subject as well. Lots of good info out there, you just gotta know where to look!! On another note....There's a shit ton of wanna-be professional porters on youtube that are complete idiots. You can still sometimes learn from their technique or tools used but that's about it. Eric......Thanks for doing the videos!!! A little more info on the area's you're targeting (sizing) and why would be cool....but beggars can't be choosers.
I keep watching your videos after they popped up on my feed about a month ago feel like i should send my top end to you next year for porting on my 2bbl e-mod engine 400sbc 327 crank 4.130 bore custom domes world iron heads and dart-wilson air gap intake keep up the videos!
I see you port single plane intakes for drag racing. Would a street duel plane intake benefit from porting? Would it improve acceleration from light to light street racing?
I've also have heard that a smooth finish will make fuel puddle. So rough bottom makes sense.
Hey man I enjoy your videos and there's an audience for what you do! Keep posting!
End all the controversy; get the port shapes and volumes where you want them and finish it with Extrude-hone. Best of all worlds?
For an extra 5 horses under my hood, I add [brand name] racing shop stickers to the body.
Lol, she's ported and I dun it myself, lol. Ok skippy. Great work and video!
Material removed is same, but finishes are different. Why not use a soft media blast to change finish?
I've learned that the bur finish is all you need. I don't do much sanding anymore. Waste of time unless you're into looks. I'm not.
How much do you sale the small block Chevy intakes for
Forget texture finish, I wanna know how much flow you gained opening up the plenum that much...
Except somebody was running a carb spacer in the first place, i doubt much. Unless... the cam wanted to be at home in a higher rpm range anyway. Adding plenum volume dampens pulse flow/signal anomalies [alongside reduced velocity before the turn], which is what forces powerband range up. On an engine that copes with a fair amount of reversion the extra volume can be a good thing - or not. This is a serious manifold - something destined for 7k+ rpm I would think. What I missed is how big a motor he typically finds this manifold gets put on? I can't imagine anything smaller than 418, but... many out there more clever than me.
@@flinch622
Yeah I assumed it’s for a high RPM max effort type engine too, that cavern isn’t gonna do much at low speed...
Picked up - - HOW MUCH!!!!! ?
Do you port and polish the intake runners. And what are the benefits of port and polish. Do you polish the runners??
Yes. The power gain depends on combination
ERIC! That manifold with a SNIPER STEALTH 4500!!! BET!
I would go with the burr finish
I love that BILL MITCHELL states, "There is no extra plenum work required on this intake."
I've been looking for a company to do some work on my intake manifold such as raising the port roof and mild porting . All I find is wilson manifold
In Florida. Anyone else out there ??
Yes me.
@@WeingartnerRacing I'll be in Contact with you later tonight. Thanks
The burr finish saga. I grant that it may help keep suspended better in some applications, but it may just be that the ducting in those applications may be too large and/or improperly tapered.
The test someone should do is to dyno using burr and smooth finishes and alter fuels. Use propane(C3H8) or methane (CH4). If there are no changes from using gaseous fuel, but changes using liquid fuel, then search for the mechanism. Performing experiments accurate enough to separate signal from noise isn't easy, but it should be done.
Saw on the tube a video with good headporter testing a 60 grit to burr finish on a BBC. The burr finish had 20 hp more. ( dont recall everywhere or specific rpm). Then he yook the heads and changed back from burr to grit 60... He lost the 20 hp. Then got the heads of again and he used a longer aluminium burr which he bent a bit on purpose to create an even rougher burr finish. That picked up 25 hp. 5 hp more then the normal burr finish. So he stated clearly that shape of ports was more important then a mirror like finish on a BBC.
As professional head porter I have seen everything in between working best: mirror like finish on sbc to ultra rough on BBC all back to back tested. But also in compact sport cars where grit 60 produced 5 hp more then the requested grit 120 by customer ( for the nice looks..) to also mirror finish of motorbike ports..
Generally the lower the velocity in the intake port....the rougher the finish... But exceptions ...I have seen a lot......
Btw, really great work, as usual! Lots of material removed and great radiused runner entries! Lots of work there.....👍👍
I'm porting for Percision Engine Service in Middletown NY. For 35 years!! Love it!
You do very nice work
What do you typically charge to do this level of porting?
Your obviously a man who takes pride in his craftsmanship. Finishes on intake manifolds and intake ports of heads has been a topic of conversation for many years. I agree it’s hard to find someone who has dedicated the time and resources to test his finished products using a logical fair process. There’s just so many variables to consider. Richard holdener on you tube does a lot with the LS turbo applications. Thanks for sharing you information.
LOL please stop making them feel bad
Have you given any thought to swirling the air flow into the intake bowl. Thx
Is there a list somewhere showing how to figure out your areas for intakes and cylinder heads needed for a given combination? I know there's some you have to pay for but hard to justify when you build one engine ever few years
Just the program you pay for.
Thanks for video!
Have you checked the Motown 4500 intake from World Products ?
Yes they are the same as the bmp. They just changed their name.
@@WeingartnerRacing Thanks for the reply , I thought that looked like the same intake .
Thank you for being honest about porting vs polishing.. porting makes power, polishing makes money!
Why does Edelbrock/BMP cast their Dominator manifolds that way? (with the cloverleaf flange)
First thing I did to my 2970 Edelbrock was bolt it to the Bridgeport and mill the flange out similar to yours.
Do you work with bbf/sbf?
Sbf all the time. Bbf not as much because there are less out there. Personally I like the sbf heads best of all families.
Eric I would like to see a comparison between the burr, smooth and the golf ball or crater surface bottom and see the performance differents. Great videos Eric and thanks for passing on your help and knowledge.
5HP is 5HP!! Lol. Just found your channel, I’m enjoying your content. I’m gonna be porting the outside of the intake for better flow/looks, looking for some big power gains.
why would you port eh outside of an intake?? this makes no sense
Eric, how is the dimpled finish done? Do you offer that? Is there a horsepower gain?
Loads of useful knowledge here, from a professional at that !! Not some slob in his shed with a Harbor freight angle grinder. You're willingness to share your info is much appreciated Eric. Thank you !
The debate over surface finish rages on. Personally, I prefer the rougher finish....but I can see it being a crutch as well. By polishing the sides and roof, increasing the boundary layer, you're in effect making the runner "Act" smaller. So if the runner is in fact too big for that particular application, then the smoother finish might pick it up.
Everything is application specific.....everything...
And like everything else, everyone has their own opinions. Darin Morgan has done a couple podcasts on the subject as well. Lots of good info out there, you just gotta know where to look!!
On another note....There's a shit ton of wanna-be professional porters on youtube that are complete idiots. You can still sometimes learn from their technique or tools used but that's about it.
Eric......Thanks for doing the videos!!! A little more info on the area's you're targeting (sizing) and why would be cool....but beggars can't be choosers.
Amen brother! So much mixed info you want a smooth bottom no you want a rough bottom or this or that etc..
some good info here thanks for sharing !
I keep watching your videos after they popped up on my feed about a month ago feel like i should send my top end to you next year for porting on my 2bbl e-mod engine 400sbc 327 crank 4.130 bore custom domes world iron heads and dart-wilson air gap intake keep up the videos!
Enjoyed the content Eric..
Well said Eric, drop the mic...lol
Nice job Eric!