What was the pinch Sq/inches before and after port work ?
@servediocylinderheadsКүн бұрын
@@paulthompson1654 I have one stock port left to get stock flows and dykem info. I will measure it. Thanks
@jeremymartin7474Күн бұрын
Andy calling that a “Moon Rock” might have been the funniest thing I’ve heard a guy say in awhile
@servediocylinderheadsКүн бұрын
@@jeremymartin7474 We had a good time. Thanks
@approachingtarget.4503Күн бұрын
That tolerance is more than acceptable. Heat expansion will add up to well over that. With extreme conditions, coil bind gets within .050. That is about the minimum once you add in heat expansion. With room to play. I bet when you examine your pushrod length and it will have greater variation than that.
@juhanahuovinen2 күн бұрын
Hello, would you try polishing the intake ssr to fix the noise? Thanks for sharing, -juhana
@servediocylinderheads2 күн бұрын
@@juhanahuovinen You bet!
@clarkmcmahan15952 күн бұрын
Sir I think that's a REV brand valve .descent valves ..should do just fine
@servediocylinderheads2 күн бұрын
@@clarkmcmahan1595 Ok, I feel better . Thanks!
@brokentoolgarage2 күн бұрын
Nice! Strobe can be from an a/c light (60 hz) and recording at 60 frames a second
@jamesholmes39552 күн бұрын
Charles....thank you for sharing. It takes time to do these videos and we appreciate you.
@servediocylinderheads2 күн бұрын
@@jamesholmes3955 Thanks!
@curtthompson27873 күн бұрын
Soooo.... are these the Promaxx Maxx? They have different heads, not just 1.
@servediocylinderheads2 күн бұрын
@@curtthompson2787 I have no idea. Thanks
@Inthefoxhole3 күн бұрын
041 x heads fixed and modified.Better than any gm stock head modified.
@servediocylinderheads3 күн бұрын
@@Inthefoxhole Thanks!
@DusterCI4 күн бұрын
Hello this is the Magnum template guy, I got a set of the EQ heads and doing a little porting, mainly cleanup of the casting which has a lot to be desired compaired to my cracked Magnums. The question is did the EQ valves have the anti-reversion lip? Mine do but the Magnum valves don't, either intake or exhaust. So should I use the Magnum valves or just back cut or texture the EQs for better low lift flow. This is for my 73 Duster that is a cruiser not racing. Will be going with a low lift cam .450?? and just want low end torque. Really enjoy your videos.
@servediocylinderheads4 күн бұрын
@DusterCI I didn't get EQ valves. If the magnums are in good shape, give the intakes a back cut and some texture. Be sure the 45's get a cut.
@DusterCI4 күн бұрын
@@servediocylinderheads Back cut and texture it is and if I screw up still have the Magnums.
@servediocylinderheads4 күн бұрын
@@DusterCI No back cut on exhaust!
@DusterCI4 күн бұрын
@@servediocylinderheads Got it, Thanks
@kenwilliams7014 күн бұрын
You have done some very good videos on head porting and it is going to be interesting how these heads turn out. Have ever thought about doing a short video on the use of flowballs? Such as showing what happens when they are used and what should be done after seeing the results.
@servediocylinderheads4 күн бұрын
@@kenwilliams701 I thought I did that already. Thanks
@kenwilliams7014 күн бұрын
@@servediocylinderheads I did search for flowball in the search option and did not see anything. I seen one on pitot tube that was very good. Is the flowball use possibly buried in a video that is named for something else. Thanks for the great work and videos.
@servediocylinderheads4 күн бұрын
@@kenwilliams701 I could do one. I may need reminding. Thanks
@kenwilliams7014 күн бұрын
@@servediocylinderheadsThanks That would be great. I built an eight motor PTS flow bench many years ago for some racing I was doing then but never really scienced out how to do the porting correctly. Put it in the corner when I was done racing and have not done much with it. I have a 2001 S10 Blazer now and want to get more power out of the 4.3 so decided to port a set of heads. Now that I'm older, want to do it right and understand what is going on in the port.
@servediocylinderheads4 күн бұрын
@@kenwilliams701 Excellent!
@robertwest30934 күн бұрын
Promaxx is one of the best deals on heads out there.
@mikegillam10004 күн бұрын
Sadly their prices have gone up in the past few years, but they are still very solid bang for your buck
@brokejoebuilds51655 күн бұрын
Copy of the brodix ik200
@servediocylinderheads5 күн бұрын
@@brokejoebuilds5165 I think you are right. Thanks
@patrickwendling67595 күн бұрын
CHINA . Why are AMERICANS Supporting China who steal & copies our technology then under sells USA killing our economy.. BUY AMERICAN.. USA 🇺🇸
@itseithergonnaworkoritaint78525 күн бұрын
Can't wait to see how much more gooder you make them.😎👍
@servediocylinderheads5 күн бұрын
@@itseithergonnaworkoritaint7852 Funny!
@Comet-hn3gm5 күн бұрын
I have sold those with the black coating. For someone that want's that look they are great. I have sold a few sets of these. They work really well with blending the top cut into the chamber, and yes the short side has a decent shape, but can be improved. On the exhaust I cut a 75° and fix the short side as all of them have not been near as good as they should have been. Also I open the pinch at the top [trapezoidal] as per D.V. I have put them on a couple of 383 with 11to1 with 238 @.050 Hydraulic roller camshaft and they perform quite well. 600 hp. ? I have my doubts.
@servediocylinderheads5 күн бұрын
@@Comet-hn3gm 600 is pushing it no doubt. Thanks
@mikkokuorttinen31135 күн бұрын
Thank you Charles for the review! Would you happen to have any changes to review & flow the GM's factory 113 aluminum heads? I've got 2 pairs of them and would like to know what's restricting them besides the obvious stock valves
@servediocylinderheads5 күн бұрын
@@mikkokuorttinen3113 I have a set. 2.0"/1.55" valves and lots of porting. 265cfm.
@williamherring54415 күн бұрын
Is pretty fast? Wouldn’t that make it “pretty fast”?
@approachingtarget.45035 күн бұрын
BRODIX Racerite.
@servediocylinderheads5 күн бұрын
@@approachingtarget.4503 Is that what was copied? I thought it was the iron killer. Thanks
@mikegillam10004 күн бұрын
Eric Weingartner did a side by side comparison of the Promaxx Maxx series 200cc head and the Brodix IK 200. The Promaxx sure seemed like a copy of the IK design, but oddly enough it seemed like a higher quality casting with some some more attention paid to bowl blending
@servediocylinderheads4 күн бұрын
@@mikegillam1000 Good info. Thanks
@4speed3pedals5 күн бұрын
Charlie, have you any experience with the Ebay heads sold by Deep Motors? They appear to be very nice castings with a good finish. They are some of the least priced heads I could find.
@servediocylinderheads5 күн бұрын
@@4speed3pedals No. Sorry
@ericuncapher99225 күн бұрын
I just bought a pair. Mine does not have that black coating. And the edge isn't sharp. You sure thats a ProMaxx head?
@servediocylinderheads5 күн бұрын
@@ericuncapher9922 It is. It is the marine model.
@ericuncapher99225 күн бұрын
@@servediocylinderheads Gotcha..Thanks for the information!
@brokentoolgarage5 күн бұрын
Nice! I have been eying Promaxx Mopar heads
@No1414body5 күн бұрын
580hp potential out of the box on the intake, needs work on the exhaust though
@servediocylinderheads5 күн бұрын
@@No1414body Better than I expected. Thanks
@luckyPiston5 күн бұрын
The Wallace racing calculator says : for Typ. Race Eng ... The HP for your Cylinder Head Flow of 265 is 545 with a RPM Range of 5,271 to 6,771 for your engine size of 408 CID And for Superstock Eng ... The HP for your Cylinder Head Flow of 265 is 604 with a RPM Range of 5,271 to 6,771 for your engine size of 408 CID At the Superstock level adding 15 cfm nicely gets a good bump in power and potential RPM ... The HP for your Cylinder Head Flow of 280 is 638 with a RPM Range of 5,654 to 7,154 for your engine size of 408 CID
@servediocylinderheads5 күн бұрын
@@luckyPiston Good info. Thanks
@therocket280z75 күн бұрын
You should also cut the plenum divider down about 3/8in. It greatly improves fuel distribution, and because of that is worth around 8hp.
@servediocylinderheads5 күн бұрын
@@therocket280z7 That is not how I do it. I have a sleeper performer rpm video somewhere that shows how I do it. Thanks
@therocket280z75 күн бұрын
@@servediocylinderheads Lol, well, enjoy your own video, because I'm not going looking for it when I know, as does the industry, that it works...
@servediocylinderheads5 күн бұрын
@@therocket280z7 There is a better way than dropping the whole divider down...
@therocket280z75 күн бұрын
@@servediocylinderheads Great!
@therocket280z74 күн бұрын
@@servediocylinderheads Send me a link to the video...
@ThisFyneOleTruck5 күн бұрын
I'm lightly porting my Brodix heads right now, the fit n finish is Aweful, the flashing is terrible, chunks started breaking off when I started grinding, bolt on my ass. 3 valves didn't wanna come out, seals not all installed, plugs don't thread all the way in....
@servediocylinderheads5 күн бұрын
@@ThisFyneOleTruck They always need work!
@robertwest30934 күн бұрын
Yeah, and Brodix is one of the higher priced options.
@roberthollinshead23255 күн бұрын
Why not meaure all the valves and move them around if there's different stem heghts for a more even install height. The last set of Elgin valves i used all measured exactly the same length. When doing the valve job with stones i usually do an end chamber first. Then do the other end chamber next till its the same depth. I load a valve in each. If i place a machinist straight edge from valve tip to valve tip it shows me how deep to make the middle chamber seats so all the valve heights are exactly the same. It takes some time pulling pilots and checking but very accurate.
@servediocylinderheads5 күн бұрын
@@roberthollinshead2325 Thanks!
@westing1236 күн бұрын
Can this be applied to the dividers in an intake manifold for a straight six?
@servediocylinderheads6 күн бұрын
@@westing123 I don't see why not.
@westing1236 күн бұрын
@@servediocylinderheads Thanks for taking the time to answer my question. I`ll let you know how it goes
@ArvineHarry7 күн бұрын
Hi, gr8 video, now i want that tool😂😂😂, just a thought, if you have the time, what about trying each valve in one seat installed to see if there are manufacturing differences, if there are, installing - removing- checking this measurement for each valve individually in each seat could result in closer numbers in this measurement....on another note, hand grinding valves to mate to seats- it can be measured how much grinding results in how much this measurement reduces....
@servediocylinderheads7 күн бұрын
@@ArvineHarry You make a good point. Thanks
@arturozarate17527 күн бұрын
Use the valve for that specific hole. Lapping with fine compound might give a thou.
@blkcoupequattro7 күн бұрын
I would cc the cambers when done that small amount will be hardly noticeable, main thing is your spring seat pressures are even, and your not throwing your rocker arm geometry off .....
@mikkokuorttinen31137 күн бұрын
Welcome back Charles!! My sbc has got cylinder pressure of about 115psi on most of the cylinders except on the 6th cylinder which has got 85psi. I enjoy driving and wouldn't perhaps even notice if yet another cylinder would drop to 85
@servediocylinderheads7 күн бұрын
@@mikkokuorttinen3113 That is pretty low. Not very efficient. Glad you still enjoy it.
@bcbloc027 күн бұрын
I set spring pressure up +-.010 Mainly because that is my thinnest shim. If you actually test every spring in a set and profile their spring rates you will find they slightly vary too. Spending a bunch of time for perfection rarely returns a noticeable difference. If it’s good it’s good.😊
@servediocylinderheads7 күн бұрын
@@bcbloc02 Excellent. Thanks
@paultucker20277 күн бұрын
Surely its down to the spring rate... X thou x Y Ilb/inch. I.e. What's the variation in seat pressure?
@servediocylinderheads7 күн бұрын
@@paultucker2027 I will not be setting up the springs on these. Thanks
@theshed88027 күн бұрын
Just remember Charlie that the only number that is relevant is the number that relates to the actual valve that will be in that hole. Without knowing the manufacturing tolerance on the valves, you might be doing a lot of work for nothing. I'd suggest that you measure every valve in the same hole to verify the assembled height of each valve. They 'should' be extremely close, but are they?
@servediocylinderheads7 күн бұрын
@@theshed8802 You make a good point. Thanks
@DusterCI7 күн бұрын
Check out Powell Cams video on Camshaft 101 Ep#5. He talks about using the valve spring height mic and easy to make mistakes. P.S Ended up getting a set of EQ-CH318BA heads for my 5.9 Magnum rebuild and now trying to pick the right cam for it before head back to FL for the winter.
@servediocylinderheads7 күн бұрын
@@DusterCI Sweet
@jackbooten26817 күн бұрын
Like to see a dyno or an ET of some of your work.
@servediocylinderheads7 күн бұрын
D.V. and I did some dyno work. Thanks
@jackbooten26817 күн бұрын
@@servediocylinderheads Thanks
@bcbloc0210 күн бұрын
Doing those cross sections is really interesting.
@servediocylinderheads10 күн бұрын
@@bcbloc02 Thanks
@gdelfs694210 күн бұрын
Learning a lot from you guys! Thank you so much
@servediocylinderheads10 күн бұрын
@@gdelfs6942 Thanks!
@bcbloc0211 күн бұрын
Very Interesting! I can't wait to get to do some playing on my flow bench I picked up and start learning.
@servediocylinderheads11 күн бұрын
@@bcbloc02 Sweet!
@robertwest309311 күн бұрын
CNC Hands Servedio 😅 I tell everyone that your hand porting looks better than anything that comes off of a CNC milling machine.
@servediocylinderheads11 күн бұрын
@@robertwest3093 Haha, funny!
@stevecowan136212 күн бұрын
I did this same test a few years ago. I used a bore sleeve off the head deck and used exhaust pitot tube to measure velocity around the circumference of the intake valve. Because of the 23 degree valve angle and chamber design you can not get consistent velocity around the valve. When you used the long wand it shows atmospheric pressure smacking the string, this is why it was bouncing around. Checking cfm this way is a waste of time in my opinion. The cylinder head sits on a cylinder bore. If you go crazy and enshrouded the chamber to much you will kill the head.
@servediocylinderheads12 күн бұрын
@@stevecowan1362 I agree. Thanks
@axlegrind421213 күн бұрын
looks like the air/fuel mix, like the dykem, is slamming into the straight up and down wall of the long (missing) radius. what good is an atomized a/f mix after it slams into the wall and breaks up? the long radius is just that. a radius, not a straight wall. an hour glass shape is much more efficient.
@servediocylinderheads13 күн бұрын
@@axlegrind4212 Easy on an 18 degree head?
@axlegrind421212 күн бұрын
@@servediocylinderheads i understand you're just doing a "clean up" but there is enough material in that straight wall to put in a long radius. the dykem doesn't lie. the air/fuel is going to slam and separate when it hits that straight wall.
@servediocylinderheads12 күн бұрын
@@axlegrind4212 I think you need to watch the rest of the series. A bit more than a clean up. Thanks
@ThomasELeClair13 күн бұрын
,,,,,,,,,,,,,,,,high school,,,,,wow,,,,you started young,,,,,,,Wish that I had,,,,,,,,,I started doin my own heads in the 1980's , with my harleys.......got all the sioux stuff you showed,,,,,,good to have kwik way stuff,,,,black and decker too..................stones require lots of hours to perfect a valve job.........I can take my heads to my big guys machine shop,,,,and with his Serdi setup,,,,he'll cut the three angles with one pass......but you know all that..............thanks....
@mattmullins797613 күн бұрын
How much would it cost to get a set like these done?? Never been ported??
Hey Charles, I'd like to have you port my edelbrock tpi intake base- it's the same as a tpis big mouth base. Is this something we can make happen? Thanks
It seems like the only good option is to create valve size stagger and optimize each port for the valve being served….. what I don’t think makes sense with the poly quad is replacing all four valves. I think replacing one intake with larger should serve the goal.
@servediocylinderheads16 күн бұрын
@@shane-222 Thanks
@user-zu2ed6ye5w16 күн бұрын
As DV says, flow is not everything, its flow velocity, flow density, and discharge coeficiant, so, before you brag and have to eat humble pie, make sure you understand a lot more than you do know!! I will laugh my butt off if you lose! I dislike braggers like you, my brother in law was one. I dont regret him being gone !
@servediocylinderheads16 күн бұрын
@@user-zu2ed6ye5w I would need to rewatch this video and see if I was bragging. I do know a 492 chevy head that flows 275 cfm is quite good. Thanks
@rolandotillit286716 күн бұрын
11cfm difference is fantastic, that's like a 2% difference worst case scenario. Would you bat an eye if you saw a 2% difference in compression across an engine? 2% variance in leak down? I wouldn't. Keep up the good work sir.
@servediocylinderheads16 күн бұрын
@@rolandotillit2867 Thanks!
@patrickwendling675916 күн бұрын
its flowing in reverse and not hooked up to a head which i would like to see.
@servediocylinderheads16 күн бұрын
@@patrickwendling6759 It is not flowing in reverse. The bench is on exhaust.