Here’s an idea for the next 1-2 video’s…. How to select the correct spring weight/length/height for selected rpm (from street to 9000rpm screamers). Perhaps even explaining the pro’s/con’s of different seat angles on valve float?
Ferrea valves are great. Run them in an engine from 2003 to 2015 with no problems. Just changed the springs when the pressures dropped below 230lbs from 255lbs on the seat. Got over 100 passes a year on the springs. The exhaust springs were the ones to loose pressure. Run isky tool room springs on the Brodix bb3 plus heads.
Im not all the way caught up on your videos, but can you explain the bowl to throat to valve percentage and what all it exactly means for proper flow/mixture?
How much bigger should the bowl be compared to the throat ? Should the back wall also be bigger than the throat ? Also , a up close look when your explaining the throat measurement would be a lil better but still u did an awesome job at explaining . Ty Eric .
Ferrea valves are the best. Run them on my 555 from 2003 to 2015. Replaced the valve springs when the seat pressure dropped below 230 on the seat from 255lbs with alittle over 100 passes per year with no valve failures on brodix bb3 plus heads.
My son bought a John Deere 3010 tractor that was just rebuilt but it had spun a rod bearing. We pulled the head and it had all new seats but they had installed the intake valves in the exhaust holes and the exhaust in the intkae holes. The one valve was sitting about 3/16 lower than the other. We also found out why it had spun a rod bearing. They had put a shim behind the main bearing evidently to tighten it up but it covered over the oil hole. lol
@@WeingartnerRacing I have been watching your videos since I am about to port a head for a 4010 tractor that we are going to pull. Its nothing too serious but The original engine was 404 cu. in but I bored it and installed larger sleeves and it has a stroked crank so the cu. in is now 531 . It is diesel and will only turn about 3200 rpm. I installed larger seats and am putting in larger valves. The ports are roughly only about 1 1/2" round ports and I dont want to make them too big and kill the torque. You seem to recommend about 90 percent on the throat size but should it be less for an engine that only turns 3200 rpm. Here is a video of it pulling with the stock valves but after it was bored and stroked. As you can see it needs more air. It didnt run too bad but could be better. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qoKoMCnk5jU.html
So I watched your other video last week on what not to do on porting a head and what happens when you oversize the throat. Is there a set ratio or distance that the throat should be into the chamber from the valve seat? Should it be just below the second back cut? If you could shed some light on that, that would be great.
Just found your channel, looks great so far! I have a home-made Vizard style flowbench, it's basic but gets me by. Thanks for sharing your experience mate. 👍
@@440cubicinch Its basically a shop vac and a manometer hooked to a hollowed out soark plug. It can even be calibrated for CFM but gives you good comparitive results as-is.
@@440cubicinch Check out Made By Nobody Famous here on RU-vid, he has a nice one he made himself, more complex than mine though. TheNewBH explained how mine is set up, its not perfect but it's better than nothing. Mine is analogue and version 1.0 of many revisions to come 🙂.
Thanks for making this video it would have taken time to set up . It's always interesting to see the thought process going into why you do what you do. It would be great if you can explore the relationship between cubic inches, port volume , compression ,camshaft design and engine use, in future videos. I think you would have some interesting theories.
Sweet video man, all the knowledge! I’m definitely a fan of lighter valves, from rpm potential, or like in the case of a stock ls, you can make a lighter valve perform good with less spring to make everything last longer
Hey Eric can you do a video on rolling valve angles and what it actually means. I know someone that has a killer set of 23 degree heads but the valves are rolled to 21degrees heads are brodix not sure on the model but they flow over 380 cfm. On a 434 sbc it made 890hp from a single carb. Engine was built by extreme racing engines in NY about 10 years ago. Be interested to see if you do any of that kind of stuff. Thanks
Hey man I got a set of alum patriot freedom 202 sbc heads really cheap r they worth putting money in them port and polish them and better values in them maybe for a little nos wanting to make power out of my little small block
Hi Eric, from what your saying a 100% ratio would be bad when measuring the throat/valve head for obvious reasons, what would say would be an ideal percentage for maximum flow through the throat without losing too much material (throat/valve seat mating surface area)...I know if you shave too much you have a possible chance of the valve seat coming loose. Thanks Eric
I know you are busy, but was wondering if you’d be willing to answer a quick question I’m building a turbo 5.3 with 243’s that I’m porting myself looking at 850 whp and realistically I’ll probably turn it up a bit more. What valve package would you recommend ( hydraulic roller 7k+ peak with a 8k shift point) mostly race but may take on a drag & drive. Thanks for any advice
On coated titanium valves can they be cut? If cut doesn’t it remove the coating? Also how do you lap a coated titanium valve to the head? Does lapping remove the coating? How do you insure a good seal on a coated titanium valve if you can’t lap it? Reason I am asking is because I have a set of used brodix heads with titanium valves and want to put them back in service. Thanks for taking the time to show and explain all of this, it really helps, especially when trying to select the correct components for an engine.
First off Happy Fathers Day!!! Awesome Video. Thank you for posting this. Curious, Is there supposed to be a percentage % difference from the bowl to the throat diameter for good flow or just make the Bowl bigger than the throat??
Don't you need special valve guide material with titanium valves? I know it used to be bearing bronze but I'm sure things have progressed in the last 20 years or so and a more 'exotic' material is now used?
nice video! My heads seem to have 92.6-93 percent throats right out of the box... How common is that? I dont have access to a flow bench but from the sounds of things they probably wont flow well. They are 2014 procomp/speedmaster BBC oval ports
When I looked up this video that's exactly what I typed in that I was looking for is how to know which valve you need for like in this case I got a Chevy 350 bent valve exhaust valve and on order a new one just a OEM you know but I wanted to know if there was some kind of code on the block or maybe a code on the valve that just tells this is the valve that go in here you know OEM vows and I seem to cannot find that information at all of how you would just or a company might just punch in the numbers and say yeah that that cylinder I mean not cylinder but that head takes this type valve OEM valve you know from Chevy but it seems that there is none of that out there that I can find so far unless you know I'd appreciate it greatly if you can tell me that other than that I guess you just measure the valves to order the right one from what I'm finding out as of right now with about an hour's in on research I might find out more later or maybe you have a tip tech tip as they call it for me and I would greatly appreciate it thanks so much love to be it hope to hear from you
Nobody I know uses 30degree seats because they are not good for performance. Although on guy that is the “guru” swore by them. Most use 45degree. The advantage of 50degree seats usually show up above .600 lift but it does make the curtain area smaller.
@@WeingartnerRacing I run 30 on the intake but all I do are flatheads, where all the rules go out the window because were skating air off one side of the seat. I suspect some stock class heads with very low lift limits might run close to 30 degrees but I cant say for sure.
Hi man! I am from to Argentina and here there are many awesome race car and a lot of good manufacturer of engines and parts.. in my opinion in Argentina there are the best 6 inline N/A of the world, for example its comon see, olds six inline chevy 230 and 250 which can turn near 10.000rpm with only one carburator weber IDA.. regards from argentina your videos are very interesant
Thanks for the great videos have a question for you I have a set of 14 degree Big Chief that I had cnc'd about 15 years ago I bought all brand new titanium valves xceldyne intakes that were DLC coated on the heads the exhaust I had made up when I worked at r o u s h Industries when I work there they are not coated yet I'm sure you could send them out someplace and have them coated like my intakes were when I bought them naturally intakes 2.4 the exhaust 1/9 receipts when I bought the heads brand new they were unported just was seats and guides in them and left a ductile iron seats in them is that going to be a problem in a boosted engine not to going not going to go crazy on the Boost only maybe 20 25 psi Max going to do a pump gas race gas so I can drive it on the street a tad bit that is a gen3 4 four-link chromoly roll cage was originally build up for nmca Nostalgia Pro Street but now I want to put a pair of turbos being not I'm not going to go crazy on the Boost what's your oil make plenty of HP what is your take on using titanium valves what the iron ductile seats or whatever they're made of that come from the factory with them they are not the copper billennium they still need some blend work and assembled I have all the brand new parts pack 1358 Springs pack retainers pack tax spring locators VTO seals they still have the factory sealing surface on them they will need a skim cut what is your take on using the titanium valves with those seats in them for what I am doing I will not be turning this thing I'm a higher than 75 probably more like in a lower sevens Max thanks Jim Bowman 734 7722 886
James Bowman here again the valves are beadlock and I have the beadlock titanium keepers in the springs I just bought last year valve job is 50° on both intake and exhaust just to add some extra info one head is still have some burn marks in it need some blend work the rest of everything is been cnc'd intakes bowls thanks Jim when you get a chance if you could get back to me at 734-772-2886 if you're interested or could give me import on the seats that are in the heads with titanium valves they are the older Square port 14 degree olds last three digits 816 but our brand new
I don’t know if they last longer than steel because usually something else breaks before the valve. The coating is on the stem too which is actually slicker and easier on the guides.
