Can you convert a set of originals to B1 MC's
I thought they were from the same castings.
What's entailed or is the valve angle the problem?

They start life as the same casting.. but when they make the
M/C head they move the valve over.. so the guide is moved over

No...

How much more power can you make with mcs over the originals ?

How much more power can you make with mcs over the originals ?

Per Koffel 70-80 HP

why not AL

You can do anything want with them if you are willing to spend enough money, but why would you? Why not just buy new castings or an MC setup?

You can but you will have to have custom guides with oversize od's made to move the guides over.

.... just buy the M/C heads...check into
the winter sales at Koefel(sp)... thats when I got mine
and had Modern CNC them

.... just buy the M/C heads...check into
the winter sales at Koefel(sp)... thats when I got mine
and had Modern CNC them
[/quote]

What kind of numbers were they before and after the Modern CNC program Mike?

What kind of numbers were they before and after the Modern CNC program Mike? [/quote]

I didnt flow them before... but it was something like
456 or 485 something after... I dont remember and I have
sold all that stuff

Wrong Mike, we flow tested your heads and they were 418 @.900 with a 2.400 valve and a 50 deg. seat, exhaust 313 @.900 with a 1.810 and a 45 deg. seat, this is how all the air flow wars start on web boards. Mike would you like a copy of your flow sheet ?

Dont need it.. as you know I sold all my B-1 and mega
block stuff... and your right.. this is how the wars
start... you have your numbers and Modern had theirs and
Koefels had theirs

And apparently you have yours also lol

And you have yours.... LOL.. I dont care to get into
the BS... you believe in your numbers.. others believe
in theirs.... so WHO is right

Your missing the point, people throw flow numbers out there and have nothing to back them up, we do and so do some others. If your not sure about something best not to make it up and mislead people. Its not a right or wrong thing also, flow benches differ, its a tool to learn with and make gains, that's all.

Like I said.. 456... but like I also said I forget
since I sold my b-1 stuff... I really dont listen to
you any more after you screwed me... so I wont respond
to you any more.. have a good night

Some "hostility" here ?

Really just 419 from a ported b1 mc ?
Seems low to me, but I guess I'd be more worried about how well the motor ran.....

419..... 480 something. it's all in perception. Kind of like the size of that "1 beer" you told the officer you had

This is why I give guys before and after flow numbers. If you go on Stan Weisses head flow website you may notice a pattern of high numbers. I know I have and ignore those posted

I use to flow my own stuff at work.. I'd just stay
around after work or do it at lunch time.. it was
in the head lab at Chrysler.. their numbers I could
go by since they werent trying to impress anyone..
they just got as good as they could with a certain
design and then it went on the dyno.. that is the one
thing that I miss after retiring... but thats all

PETE --- How much more power can you make with mcs over the originals ? I have the originals just wondering it is worth going to mcs. what is the most power you can make with b1 originals on a 540 ? thanks Ed

That's a tuff question and everything being the same (but why would you ) maybe 40 to 50 and that's maybe. Every engine we build is different and not to many what all they can get, some due but not many. Maybe give us a call and we can go over you combination .

A flow number is just a number and a higher one may or may not make the car actually go faster. We also don't race dynos and flow benches.

Several guys, some on this board even, spout some ridiculously high dyno numbers for their motors, but when the car runs, the numbers just aren't there.

I get calls every day about motor combos. Seems there are guys on every street corner with 434, inline valve head small Chevy's that make 900+ hp, according to them, or some dyno sheet they have in hand but I have been doing this stuff a LONG time and have YET to see one myself.

So when it comes to flowing your heads or dynoing your motor........find someone you trust to give you REAL numbers, be they good or bad and who is not interested in impressing the masses.

Local shop to me has a dyno he calls the "Humbler", because he is NOT an engine shop and has no affiliation to any. Just a dyno facility. He hurts LOTS of feelings...........LOL!!! But funny how the engines he pulls, the cars run where they should. What a novel idea.......LOL!!!