Author Topic: port example  (Read 2642 times)

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Offline Don R

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port example
« on: January 25, 2010, 11:05:25 pm »
It's not a sohc but I thought you guys would like to see the intake port in my race car.                    



Made by CFE,  called a BMF 385,  I can almost stick my hand in it.
« Last Edit: January 25, 2010, 11:10:35 pm by Don R »
No matter how many times you paint over a shadow, it's still there.
If you love it, set it free, if it stays it's probably one of my 750's.
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Offline nippon

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Re: port example
« Reply #1 on: January 26, 2010, 12:15:44 am »
Nice, is it CNC milled?

I've got some samples of my ported SOHC head here:

http://www.classiccyclecity.com/gallery/thumbnails.php?album=52&page=2

nippon

Offline Sam Green Racing

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Re: port example
« Reply #2 on: January 26, 2010, 12:48:59 am »
Hey Don, stop showing off with your 965bhp ;D ;D ;D ;D you must be one of the most powerfull members on here.

Sam. ;)
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Offline wannabridin

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Re: port example
« Reply #3 on: January 26, 2010, 05:24:06 am »
damn, that is PURDY!!!

i might start bracket racing a 900+ N/A hp drag car for a friend of mine.  7 sec 1/4 miles, small block, can't remember the other detials off the top of my head, but it's a monster.  super high quality vehicle there, but damn don, that sure is a badass head!!!  is it CNC, or was that by hand??
1976 CB750K, currently under construction:
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Offline 754

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Re: port example
« Reply #4 on: January 26, 2010, 08:38:31 am »
I'd say CNC cut as on the guide bump, then hand finished..

 give us a measurement..to get an idea of scale..
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Offline Don R

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Re: port example
« Reply #5 on: January 26, 2010, 12:56:58 pm »

  Sorry, it's the first time I have had it apart and had to show off.
  Yes that is cnc. Carl Foltz Engineering, probably close to old pro stock technology, 24.5 degree valve angle. You can't see it here but on the next port the head bolt is exposed where it passes through the port wall, however you can see the rocker stud protruding in on the upper left.
  A 7 second ride is a blast, if you get a chance try it. I tell people it's the most fun you can have with your clothes on. Like the fastest car you were ever in dumping the clutch but it pulls all the way to the finish line.
  Nippon, I see I've got some more porting to do on my 750 if I want them as nice as that , were they bead blasted after porting? they almost look cast inside. Very nice, thanks now I have something to refer to while doing mine.
No matter how many times you paint over a shadow, it's still there.
If you love it, set it free, if it stays it's probably one of my 750's.
 CEO at the no kill motorcycle shop.

Offline wannabridin

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Re: port example
« Reply #6 on: January 26, 2010, 01:41:30 pm »
i can't wait to take a 7 sec blast down the strip!  but oh MAN does my gf and mom not want me to!!

my gf went with me to her first 1/4 mile drag races a couple months ago, and the last guy of the evening slammed into the wall at about 195, had to cut the cage from around him and careflight him out, they thought he was dead...  but he started moving his fingers and toes shortly after, so he was ok.  so that def. scarred her about racing at all.... 
1976 CB750K, currently under construction:
http://forums.sohc4.net/index.php?topic=64468.0

-And if you don't do it this year, you'll be one year older when you do...

Offline Don R

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Re: port example
« Reply #7 on: January 26, 2010, 02:56:06 pm »
I always felt safer at the track than going to the track. On the way we pass several roadside memorials. We had two close calls since '89. One was a runaway car that ran into their trailer, we just happened to be behind the car when it lurched, the other was a fast dodge dart that, we found out later had crashed  on it's first pass three times.
 That's one bad small block running sevens, our 383 chevy made 684 hp and went a best of 8.03 at 165 mph. I sprayed it once with a 250 shot of nitrous and ran 7.85 at 170. A couple years lated the block split under the cam.
« Last Edit: January 26, 2010, 02:59:13 pm by Don R »
No matter how many times you paint over a shadow, it's still there.
If you love it, set it free, if it stays it's probably one of my 750's.
 CEO at the no kill motorcycle shop.

Offline Don R

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Re: port example
« Reply #8 on: January 26, 2010, 03:01:58 pm »
The clean port tells me the headers are really doing a good job, with all the overlap we run, a lot of engines are black inside the intake port due to reversion.
No matter how many times you paint over a shadow, it's still there.
If you love it, set it free, if it stays it's probably one of my 750's.
 CEO at the no kill motorcycle shop.