« previous next »
Pages: 1 [2]   Go Down

Author Topic: JMR Honda cylinder head Stage 4+  (Read 8095 times)

0 Members and 1 Guest are viewing this topic.

Offline jweeks

  • Hot Shot
  • ***
  • Posts: 545
Re: MJR Honda cylinder head Stage 4+
« Reply #25 on: December 23, 2013, 05:59:04 pm »
reduce cross section area, potentially increasing velocity, and changes the flow path. At least that's what I've read... ::)
Logged

Offline afkrejci90

  • Enthusiast
  • **
  • Posts: 192
Re: MJR Honda cylinder head Stage 4+
« Reply #26 on: December 23, 2013, 06:33:54 pm »
Interesting, but couldn't the stuff break off after awhile from heat cycles and make it's way into the cylinder?

Sent from my Nexus 4 using Tapatalk

Logged
'78 CB750K http://forums.sohc4.net/index.php?topic=105327.0
'80 CB750C - Sold
'06 CBR600RR

Offline johno

  • Expert
  • ****
  • Posts: 1,314
Re: MJR Honda cylinder head Stage 4+
« Reply #27 on: December 23, 2013, 06:55:50 pm »
In the quest for speed ..........roll the dice ;) ;D
Logged
GRASSHOPPER SOHC HONDAS ARE THE MEANING OF LIFE.

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,541
  • Big ideas....
Re: MJR Honda cylinder head Stage 4+
« Reply #28 on: December 23, 2013, 09:06:39 pm »
Quote from: afkrejci90 on December 23, 2013, 06:33:54 pm
Interesting, but couldn't the stuff break off after awhile from heat cycles and make it's way into the cylinder?

Sent from my Nexus 4 using Tapatalk
What you can't really see are the screws in the port floor to hold the epoxy in place....that is why that fin area is cut away in pic#2. But....eventually it can chip away . Keep in mind it is a singular purpose built head. Those low lift #'s are key.....remember a cam will only hold a valve open at peak lift for a millisecond BUT it will will flow twice at low lift #'s as the valve has to open AND close. That's the important part.  ;)
« Last Edit: December 23, 2013, 09:11:12 pm by MRieck »
Logged
Owner of the "Million Dollar CB"

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: JMR Honda cylinder head Stage 4+
« Reply #29 on: December 24, 2013, 06:28:49 am »
Hey guys, who's this MJR head guy we're all talking about, did you not spot it Mike ?  ;D

Sam. ;)
Logged
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,541
  • Big ideas....
Re: JMR Honda cylinder head Stage 4+
« Reply #30 on: December 24, 2013, 10:35:00 am »
I figured it would get fixed eventually and I was right. ;D ;D
Logged
Owner of the "Million Dollar CB"

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: JMR Honda cylinder head Stage 4+
« Reply #31 on: December 24, 2013, 11:17:17 am »
I'm not doing the other 27 though.  ;D ;D ;D ;D ;D ;D ;D ;D

Logged
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Leino

  • Not much of an
  • Expert
  • ****
  • Posts: 1,244
  • in drag racing since 2005
Re: JMR Honda cylinder head Stage 4+
« Reply #32 on: December 24, 2013, 02:02:59 pm »
I didn't want to get there either, I'm happy with two JMR-Suzuki's, one of them holds the quickest time and fastest terminal speed in juniordragbike in Finland and the other just kicks ass and both of them are 31 years old ;)
No Haya-crap when it comes to my team.
Logged

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: JMR Honda cylinder head Stage 4+
« Reply #33 on: December 24, 2013, 02:39:53 pm »
Even 37 year old JMR Hondamatics don't take no Haya crap.  ;D ;D ;D ;D ;D ;D ;D

http://youtu.be/NxpCWkkO7wE

Sam. ;) ;D
Logged
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline johno

  • Expert
  • ****
  • Posts: 1,314
Re: JMR Honda cylinder head Stage 4+
« Reply #34 on: December 28, 2013, 12:39:44 pm »
Sam love watching that clip, Billy your awesome ;D ....I just noticed your left leg twitching and jumping around on the start line, , is that you thinking about which leg to kick his butt. ;)
Logged
GRASSHOPPER SOHC HONDAS ARE THE MEANING OF LIFE.

Offline Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,724
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: JMR Honda cylinder head Stage 4+
« Reply #35 on: December 28, 2013, 01:05:49 pm »
No, I tripped second light before  he lit his first one. Can only trip one, then he trips one, then either can trip second light Called courtesy staging? So I had to take bike out of gear, roll back, then wait for him ,then go forward to trip second light. Think it messed him up, he thought he was going pick on us......wrong day for him to be asleep on the line! ;D Bill
Logged
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: JMR Honda cylinder head Stage 4+
« Reply #36 on: December 28, 2013, 05:21:27 pm »
It don't matter if you have got 500 + wins when you're up against a Hondamatic, there's only one way and that's OUT.  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D
Logged
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,724
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: JMR Honda cylinder head Stage 4+
« Reply #37 on: January 03, 2014, 02:35:45 pm »
That's right! Now get OUT of England and over here! I needs ya! BabyFace too! Sam, 3 of the 4 races in Ga! Get your azz over here by March 1st. This is the year! C'mon man! Your fan base awaits you. You better......I'll tell how you lost rd 3!, ;D Bill
Besides I got a head coming flowed 79 CFM @ .400!lift!! Now come HELP, you can play bingo in your 70's! ;) ;D
« Last Edit: January 03, 2014, 02:38:25 pm by Bill/BentON Racing »
Logged
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,890
  • Bought her new 4/75
Re: JMR Honda cylinder head Stage 4+
« Reply #38 on: January 03, 2014, 06:40:08 pm »
Yeah Sam! No bingo for another year  ;) You may as well move while yer at it......
Logged
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Roach Carver

  • Really Old Timer ...
  • *******
  • Posts: 6,725
Re: JMR Honda cylinder head Stage 4+
« Reply #39 on: January 03, 2014, 06:56:10 pm »
That is incredible work. Do it yourself head work sees like fun, but now seems more like a waste of time.
Logged

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,069
  • CB750F Dragbike
Re: JMR Honda cylinder head Stage 4+
« Reply #40 on: January 03, 2014, 08:05:49 pm »
Quote from: Bill/BentON Racing on January 03, 2014, 02:35:45 pm
That's right! Now get OUT of England and over here! I needs ya! BabyFace too! Sam, 3 of the 4 races in Ga! Get your azz over here by March 1st. This is the year! C'mon man! Your fan base awaits you. You better......I'll tell how you lost rd 3!, ;D Bill
Besides I got a head coming flowed 79 CFM @ .400!lift!! Now come HELP, you can play bingo in your 70's! ;) ;D

Does that mean all of us can blackmail Sam about the 3rd round??? We got to keep the band together this time fellas and hopefully Jerry will be the 4th Beetle. Lol
Logged

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,890
  • Bought her new 4/75
Re: JMR Honda cylinder head Stage 4+
« Reply #41 on: January 04, 2014, 11:36:03 am »
Oh thanks a lot Frank. Guess that means I'm Ringo  ;) You don't want to hear me sing either!
Logged
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Bill/BentON Racing

  • Really Old Timer ...
  • *******
  • Posts: 6,724
  • Ex Honda Service Manager, Cert. Honda Tech - Racer
    • BentON Racing
Re: JMR Honda cylinder head Stage 4+
« Reply #42 on: January 04, 2014, 03:42:15 pm »
I figured you were Ringo.Me, I'll go for George, leaves Sam and Frank for Paul and John ;D works for me.....but more a  Stones fan! Bill
Logged
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline johno

  • Expert
  • ****
  • Posts: 1,314
Re: JMR Honda cylinder head Stage 4+
« Reply #43 on: January 04, 2014, 04:43:18 pm »
Bill,
I thought you were a jimi hendrix boy, purple haze an all that ;D
johno
Logged
GRASSHOPPER SOHC HONDAS ARE THE MEANING OF LIFE.

Offline dragracer

  • Really Old Timer ...
  • *******
  • Posts: 5,069
  • CB750F Dragbike
Re: JMR Honda cylinder head Stage 4+
« Reply #44 on: January 04, 2014, 06:29:47 pm »
Bill, does that make Gladys, Yoko Ono?? I don't think she speaks Japanese. Lol
Logged
Pages: 1 [2]   Go Up
« previous next »