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Author Topic: 445 mud motor build  (Read 26840 times)

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KMcCullah

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Re: 445 mud motor build
« Reply #30 on: April 03, 2013, 05:18:07 PM »
I finally mocked everything together with clay strips on the pistons and the old head gaskets. My exhaust valves have .225 clearance and intakes have .165 clearance approx. The heads are being milled as I type. Going to shave .060 off. This will leave my static CR at 10.76 and DCR at 7.5. I could get the DCR up to 8.11 with Oregon cams grind #175 but it would be even worse to drive on the street, and I don't think I have enough static compression to make it worth while anyhow.
Here's a FYI also... I got a little screwed by using numbers off of Summit's web site. The head gaskets I picked up were advertised as having a 4.23 bore but they actually measured 4.39.
http://www.summitracing.com/parts/fms-m-6051-a427/overview/make/ford
What I learned was, physically measure everything before making decisions.
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Kevin McCullah

KMcCullah

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Re: 445 mud motor build
« Reply #31 on: April 09, 2013, 08:01:51 PM »
After a bunch of cussin' and discussin', the heads are finally on. Ended up milling .040 to get my cc's from around 80ish to 72ish. I was figuring on having to mill more. I guess the C4 combustion chamber is a bit shallow. And of course, milled the same amount off the intake side.

The headers went on great. Sort of tricky to hold the header and gasket up at the top of the slots and get it all snugged up.  Had to trim just a bit off the inner fenders.

I started in with port matching the Performer RPM manifold and ran into another snag. The bottom of the ports are sitting on the head gasket tabs.  >:(   So back to the Bridgeport, where I took about 1/8" off the bottom. All I can say is....Edelbrock didn't skimp on the aluminum. I bet I could have matched a HR gasket on those flanges. Sheesh!
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Kevin McCullah

jayb

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Re: 445 mud motor build
« Reply #32 on: April 09, 2013, 08:16:18 PM »
I've run across the problem at the bottom of the ports too, especially with Victor intakes.  Fortunately you have a Bridgeport, and didn't have to use a grinder ;D
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Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

My427stang

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Re: 445 mud motor build
« Reply #33 on: April 10, 2013, 06:49:30 AM »
Hey, hold on there, don't knock the manly feeling you get when you take a 6 inch Dewalt to your new Victor between your feet.

That "am I being stupid" feeling kicks in, but only for the first side :)

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Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch

KMcCullah

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Re: 445 mud motor build
« Reply #34 on: May 07, 2013, 07:04:12 PM »
It lives once again. I've actually had it running for a couple of weeks now. I took a half day off from work today so I could finish up a few loose ends and put my best tune up on. I even went to the airport and got some 100 low lead. I was going to get some VP (C12 I think) but I read that it screws up o2 sensors, so I opted for avgas.
Anyhow, look out bowtie guys. Y'all fixin to have a baaaaaaad weekend.  ;D
I shot a little video. If it seems like I'm rushing things a bit, it's because I am. My cheesy camera will only shoot video for 1 minute at a time before turning off. Hope the attachment works......

Well crap! Didnt work. Trying again...

« Last Edit: May 07, 2013, 07:08:17 PM by KMcCullah »
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Kevin McCullah

My427stang

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Re: 445 mud motor build
« Reply #35 on: May 08, 2013, 06:43:37 AM »
Looking good!
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---------------------------------
Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch

lovehamr

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Re: 445 mud motor build
« Reply #36 on: June 01, 2013, 08:26:22 PM »
Sounds good to!

What idnition system are you running?  I thought I saw both ICE and MSD components.
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KMcCullah

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Re: 445 mud motor build
« Reply #37 on: June 03, 2013, 01:56:02 PM »
Thanks guys! Ignition is all MSD. I'm thinking about trying a Duraspark. I'm not sure it would fire the HVCII coil. I think I would have to go to a different coil also. But with a Duraspark and 33" tires I could run in the stock class.
After the dirty trick at the last race race, I'm thinking about getting out of mud racing all together. In between runs somebody turned out my hubs!  >:( I still managed a 4th place out of 19 trucks. The only Ford in the top 10. So no doubt some chebby guy screwed me.
My wife and I went to the local drag races on Saturday night. So I have a few things brewing in my head again. I'm excited, she is not.  ;D
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Kevin McCullah

lovehamr

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Re: 445 mud motor build
« Reply #38 on: June 03, 2013, 02:12:32 PM »
She likes the mud does she? ;)
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jayb

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Re: 445 mud motor build
« Reply #39 on: June 03, 2013, 02:57:52 PM »
Quote from: KMcCullah on June 03, 2013, 01:56:02 PM
After the dirty trick at the last race race, I'm thinking about getting out of mud racing all together. In between runs somebody turned out my hubs!  >:( I still managed a 4th place out of 19 trucks. The only Ford in the top 10. So no doubt some chebby guy screwed me.
My wife and I went to the local drag races on Saturday night. So I have a few things brewing in my head again. I'm excited, she is not.  ;D

That is a dirty trick, alright, and a credit to your effort that you still finished fourth.  If it were me I'd make sure to go back there and kick butt at the next race.  No reason you can't have a mud truck AND a drag car, after all... ;D

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Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

KMcCullah

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Re: 445 mud motor build
« Reply #40 on: December 25, 2013, 12:47:54 PM »
It's too cold to start it so I guess I'll decorate it. I'm still trying to get a new short block built but life keeps handing me setbacks. I'm hoping 2014 cuts me and all my FE pals a little slack. Merry Christmas guys.



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Kevin McCullah

jmcgalaxie

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Re: 445 mud motor build
« Reply #41 on: December 26, 2013, 03:56:13 AM »
Quote from: KMcCullah on January 05, 2013, 10:51:29 PM
So I made some threaded sleeves with 9/16-12 threads on the O.D. and tapped 3/8-16. The off center holes were plunged thru with a end mill and tapped 9/16-12. Now the holes are back on center!
Very nice an professionnal job, but why don't you considered to use Helicoil instead
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