I know what they're advertised to flow, but I wonder what they really flow.

That chamber looks nice. I don't know how well it works, but it does look nice.

These are still std port window, and are easily the cheapest way I can think of to get to 350cfm with that sized opening.

I have these same heads after dropping 3 valves I had to re do them valve guides, spring seats. they seem to be very good heads for my use other than the bigger intake boss

I guesstimated about .0055" per CC, so I cut them .055".
As it turned out, that was worth 12cc, so they ended up at 70cc's.

Did cutting them that much regain anything in lost quench pad due to the extensive CNC carving in the chamber?

If they stay together, those could be some pretty effective flat-tappet cam heads.

Tony, it took me a few years and numerous sets of stage 6 heads coming through my shop before I had a reasonable handle on the number of oddball things that could be wrong with those heads.
So now when a set of those shows up I know to look at all kinds of things that really have nothing to do with what would be considered part of a normal prep job on virtually any other type of head. But I know these issues exist, so I look for them before I start any of the regular seat and guide work.

I’ve never seen any issues with the shaft saddle diameter before either, but now that I’m aware that this is a potential problem with these heads....... I’ll be sure to look for it in the future.

Did the person that put the rockers on the heads use the cheap non tapered thin shaft shims? is it possible to have spread the saddles & not crack them? I think so.

(It would appear the post that I’m responding to here has been deleted.
Apparently the rocker shaft fit in the saddles is a bit loose, and the poster was unhappy that I didn’t catch that when prepping the heads........ (THAT IS THE WAY IT READ TO ME INITIALLT TOO.)


There isn’t really any excuse for not catching this issue,...(I DISAGREE...where does your responsibility end? are you expected to verify the headbolt locations too?...exhaust pattern? valve angle? (THE ENGINE BUILDER IS RESPONSIBLE IMO.)

To my recollection, I never had the rocker gear here that was going to be used on these heads to test fit any of it.


Another possible solution would be to contact Mike at B3RE to see about having some shaft relocation spacers made, with the lower arc of the spacer made to match your heads.
He’d likely instruct you that you need the spacers anyway, so it would just be a matter of whether he could match the arc of those saddles or not.

I’m not sure what you’re planning on to remedy it, but I think some spacers from B3RE might be the least hassle.

I DISAGREE...where does your responsibility end?

I have no idea who deleted that post.

Also, I have no problem admitting that I didn’t test fit the shafts onto the heads......... but I won’t let that slip by again.

Like I said previously, my only defense is I’ve never come across that particular problem before.

I’m not sure what you’re planning on to remedy it, but I think some spacers from B3RE might be the least hassle.

I'm thinking, mill the stands off and Max Wedge them.

Well in my experience peoples responsibility tends to end just before the point of having to pay to replace or repair something they screwed up. (It isn't a by mistake you found Dwayne... he doesn't have a reputation for making excuses for anything he fell short of doing. AND FWIW as pointed out here it's a 'cheap/undercutting' copycat of another head already manufactured. )
Don't take this the wrong way but there are people out in the world who echo what you have just said but it's a different story when their own stuff is involved. (Thank you ...I don't fall into that category)
The problem with what you said about responsibility is that it gives people the green light to put the absolute minimum effort into something and then use that excuse as a get out of jail free card when there is a problem.(I understand your point and it is AS BROAD as saying "fix anything that is wrong" especially when you didn't give him the indented rocker gear which AS THE BUILDER you'd catch this when you check geometry and fastener engagement and etc...AGAIN where does it end 'fix anything' seats LOOK to not have enough press and with that roller cam your running I took it upon myself to put copper seats in properly because I also think you'll need Ti valves. "So I fixed 2 issues at the same time" In one of your replies you even said " I AM THE RESPONSIBLE PARTY AS THE END BUILDER" how would you even charge for 'fix anything' NOONE would even want to pay for that especially on a unknown, AGAIN cheap copycat, head. That is really especially specific and has direct reasoning as to why fundamentally if you WERE disappointed, you'd been wrong IMO. )
Example:
Imaging you brought me a carb you had just purchased. You tell me to go through it and fix anything it needs. I give it a wash, check the jets , replace the power valve and gaskets. You stick it on your engine but it runs a little rough but not too bad. (OK so I got a carb from you put it on and it runs bad but I use it anyway?) You take it for a drive anyway but it starts to backfire up through the carb, as you try to get home it backfires so bad that the air filter catches fire and you get some heat blisters in the paint on your bonnet. After another inspection of the carb it's found that the emulsion tubes weren't machined correctly and that was the cause of the backfire and damage. So you come back to me as your bonnet sits there still smoking and ask me why I didn't see it or fix it especially when you told me to "fix anything".( well now Thumper and a lot of carb builders actually TEST the carb they go-thru or build)
I say to you that it's a major operation to get to those sealed in emulsion tubes, also I've never seen that problem before. I then shrug my shoulders and say "hey man... where dose my responsibility end?" and promptly show you the door.
I'm sure you'd be a very happy camper after that...
(I don't feel this is a representative comparison of the current situation. )

You missed the point. I created that hypothetical situation to simply show the ambiguity of your argument. (And I responded to show the ambiguity of your 'fix everything' direction.) I'm not sure why you would comment it out, it's a story not a questionnaire..

Anyway, You can disagree if you like. But I think (you're allowed to speculate, but when you post it publically, you insinuate things/ unprofessional) your letting your personal friendship, feelings or whatever cloud your judgement. ("Cloud"in your opinion.) He's your friend and you feel the need to back him up...I get it. (Then you don't know me....if my 'friend' is wrong I won't argue against "truth" (I'm not defending HIM solely, it's anyone who deals with customers with your particular mindset to see in advance what they are taking on so in the future they can decide if it's worth their time.) what I feel is
Dwayne's a professional, he knows what he's capable of catching and what he's not capable of. He also knows the standard of workmanship and professionalism that he holds himself to. (This is classic patronizing...'you can do it')
I'm a professional as well, I do my best to hold myself to a high standard of workmanship and I'm the first to kick myself in the ass if I feel I'm not meeting those standards. (sincerely, that is respectable) I also expect the same high standards from those I engage to do work for me. (If his work doesn't meet your standards, I'd be happy to disappoint you)
Now if you think that I'm being too high in my expectations (no just TOO VAGUE), then I guess that's your problem because you don't have to carry the responsibilities that I do (lol really?) and you don't have to solve the problems that I have to deal with. (I guess not)
Walk a mile in my shoes, then you might be able to offer some worthwhile opinions. (I'm sorry the road is so rough for you)
The last thing I will say on the subject is this. You asked where the responsibility should end for inspecting a set of heads. This is basically what I do with brand new untested heads:

Visual inspection for flaws, shipping damage, etc.
Check finish of machined surface's and straightness.
Check all the machined holes and threaded holes.
Put on a head gasket, intake and exhaust gaskets to check chamber sealing and alignment of stud holes, ports etc.
Straight edge along the valves to check alignment and heights.
Drop in a rocker shaft to check fit, height of pedestal stands and alignment with valves. (how's he gonna do that with no valvetrain provided?) (besides ONE PART of "alignment" is 'geometry' and that is the BUILDERS responsibility
Check spring bases in head.
Guide clearance.
Seat inspection. (Now I'm not reciprocating being factious here, ALL what does this entail???...this can help ANYONE ELSE who is still reading.)
I may do other checks (? what are the other checks? ...list them, easy enough) if they have been CNC'd of are known to have common quality issues.(vague again...honestly I have NO IDEA the VERBAL? direction you gave him but it is just too vague to expect anyone to catch ALL the issues that could be with AGAIN a CHEAP COPYCAT of a produced head ESPECIALLY with vague direction)
If in doubt...call the customer....
You can get a pretty good idea if the heads are usable after this. You don't need to go crazy and put them through an MRI
It does not take long to do all this. It's not hard to do and I don't think it is beyond the ability of anyone who works on cylinder heads and has a high professional standard.
This is all done before any machine work is carried out, because if anything is wrong then the heads can be exchanged under warranty. Once they get cut you can't send them back.
It's also really important that this stuff is right if you are then going to send parts interstate or in this case overseas.
(OK now we are all learning something new...I recommend you add pressure test and dyno/integrity check before shipping an engine you build because that oversea's customer will be upset and hold you responsible for poor/thin castings. Even though this is not the nicest exchange between us, I feel there is something that could be learned here in practices and responsibilities