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CVO Technical => Milwaukee-Eight => Topic started by: MCE on September 29, 2018, 07:43:35 PM

Title: M8 Heads kick ass
Post by: MCE on September 29, 2018, 07:43:35 PM: I'm playing with some M8 take-offs while I'm here at Reher Morrison's shop.

I gotta say. I'm very impressed with what these are capable of. They have ALLOT of potential, ALLOT!!!
In stock form, they flow more than enough for the relatively small displacement motors they come on.

But for larger motors, these things have some enormous potential. I got the Intake port well into the 350s
without touching the valves or seats, (that's tomorrow's lesson).

I put a chart on my FaceBook page, (MCE Performance) of the initial go at the intake port. No seat work was
done up to this point. I expect some even better results after I fix Harley's chitty valve job. LOL

Keep your dick in a vice!
-MC

Here's a link to the preliminary flow results (in case you don't have FB)
https://ibb.co/bQev9K
Title: Re: These M8 Heads kick ass
Post by: MCE on September 30, 2018, 05:36:29 PM: Final M8 Intake port 375 CFM. Stock valves.

Dark green - stock
Red & Lime - some port work
Black - Valve job and a little more work on the port.

https://ibb.co/narsRz

The port's cross sectional area was NOT increased at all. The velocity is maintained but it was more
balanced (top to bottom) afterward.

I'm very optimistic about the potential HP of these. The only cause for concern is weather the rest of
the motor can hold up to the RPM they're capable of producing. Only time will tell.

The chart in the next post below by "Unbalanced" shows the before, during and after results of my tests.

Thank-you Unbalanced for getting it posted.
Title: Re: These M8 Heads kick ass
Post by: Unbalanced on September 30, 2018, 08:26:17 PM: (https://uploads.tapatalk-cdn.com/20181001/ffee5c55a23e51d856f134dbcee25621.png)
Title: Re: These M8 Heads kick ass
Post by: OBB on September 30, 2018, 08:26:27 PM: Quote from: MCE Performance on September 30, 2018, 05:36:29 PM

(I can't get a picture to post on this POS)

operator error... :P
Title: Re: These M8 Heads kick ass
Post by: MCE on September 30, 2018, 09:50:57 PM: Thanks gents!!!!

I always have hit&miss luck with pictures. (I can put them up on my website easier than
getting them to show up here) What'd I do wrong?
Title: Re: These M8 Heads kick ass
Post by: Unbalanced on October 01, 2018, 08:31:09 AM: Matt,

Without knowing what you tried or the message you received after trying it’s impossible to tell you what you did wrong. You might try linking pictures from your website vs sizing pictures to work here. My guess would be your pictures are too large to be posted and need to be sized to fit the sites requirements.
Title: Re: These M8 Heads kick ass
Post by: MCE on October 01, 2018, 09:38:58 AM: :oops: That didn't occur to me. But yeah, makes sense. thanks

PS: I didn't get any error messages. It just didn't show up. Blank post
is what I ended up with.
Title: Re: These M8 Heads kick ass
Post by: Unbalanced on October 01, 2018, 03:48:48 PM: Matt try and upload the picture again but before you click to post take a look by the attach file area and see if you see a message there like file too large
Title: Re: M8 Heads kick ass
Post by: Bumpandrun on October 05, 2018, 08:18:05 AM: Thanks Matt for posting....wondered how these do on a bench.
Title: Re: M8 Heads kick ass 379 CFM
Post by: MCE on October 20, 2018, 11:11:12 PM: Quote from: Bumpandrun on October 05, 2018, 08:18:05 AM
Thanks Matt for posting....wondered how these do on a bench.

Here's a vid of me testing one of these M8 heads. (This one did 379 with stock valves!)
My first YouTube video. It's only 50 seconds but ya gotta start somewhere. lol

https://www.youtube.com/watch?v=jbMHz1DYAKY
Title: Re: M8 Heads kick ass
Post by: yobtaf103 on October 23, 2018, 02:20:15 PM: Whats going on with the exh port research, thought that was deemed overly restrictive ?
Title: Re: M8 Heads kick ass
Post by: MCE on October 24, 2018, 01:14:15 PM: Quote from: yobtaf103 on October 23, 2018, 02:20:15 PM
Whats going on with the exh port research, thought that was deemed overly restrictive ?

I don't think it is. But I haven't gotten to that part yet. We'll see...
Title: Re: M8 Heads kick ass
Post by: MCE on October 24, 2018, 01:34:30 PM: Flow benches are practically useless when it comes to designing EX ports.
They will flat out lie to you, and you'll end up making changes that will destroy
power.

I don't concentrate on CFM numbers when it comes to an EX port.
Velocity and efficiency is what I look for. Those percentage "rules" you hear
bandied about are a bunch of hogwash.

Case in point: We worked on a set of V8 heads recently. We added a larger EX valve
(which picked up the flow considerably) and the engine lost 60hp on the dyno. (That
was the only change). You cannot simulate the pressures and temperature of EX gases
on a flowbench.
Title: Re: M8 Heads kick ass
Post by: goop on October 26, 2018, 01:33:34 AM: have you flow tested a set of screamin eagle ported and polished m8 heads yet.
Title: Re: M8 Heads kick ass
Post by: MCE on October 26, 2018, 09:07:26 AM: Quote from: goop on October 26, 2018, 01:33:34 AM
have you flow tested a set of screamin eagle ported and polished m8 heads yet.

No, (I have not gotten my hands on them up to this point). I would welcome the opportunity
however.
Title: Re: M8 Heads kick ass
Post by: MCE on October 28, 2018, 10:10:58 AM: Quote from: goop on October 26, 2018, 01:33:34 AM
have you flow tested a set of screamin eagle ported and polished m8 heads yet.

Goop, FYI; if you run across anyone that 'polishes' their ports, don't walk away. RUN!

Polishing a port serves absolutely no purpose (other than it looks cool). It's counter productive
to making power besides being a huge waste of time. ;)