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1  General / Coffee Shop / Re: Most popular engine used in Lawn Mower Racing today? on: December 18, 2014, 09:51:06 PM
All those classes you mentioned require different engines. So first you would need to decide what class you are wanting to run.
2  Engine Help / Briggs OHV & Vanguard / Re: EC Cam vs Cheetah on: December 18, 2014, 07:07:24 PM
Its not pressure ;lubed Nick. if it was it would not have an oil slinger. Remove the oil slinger and see how long it runs.

I don't mean the entire engine is pressure lubed, but it does build up to 20 psi and feeds oil to both crank journals and the rod through the crankshaft. I think it would be smart to keep that?
3  Race and Event Announcements / Non-Affiliated Races / Re: Southwest Kansas Lawn Mower Racing Association on: December 18, 2014, 06:59:11 PM
Yea, I'm sure we could make it work. I just don't want seats getting down between the tires like all the fxs/fxt or super mods.
4  Race and Event Announcements / Non-Affiliated Races / Southwest Kansas Lawn Mower Racing Association on: December 17, 2014, 08:43:05 PM
Check us out, http://swklmra.yolasite.com/

2014 was our first season after the local club shut down a few years ago and it turned out great, 2015 looks to be even better. We run a CP based class and hopefully a super stock  class in 2015.
5  Engine Help / Briggs OHV & Vanguard / Re: EC Cam vs Cheetah on: December 17, 2014, 07:46:48 PM
When you order it tell them to cut it in. Most dont run the pump. Parsitic drag drains HP. They dont really do squat, if they did it would not have an oil slinger in them


My engine is a 33 and has oil pressure to both crank journals and the rod, so I figured I better keep it that way.
I love this forum, its a big help to everyone building mowers.  I wish we had more time to post more.  I just wanted to clarify a few things and give some of my opinions.  We no longer grind our Cheetah profile for the single Briggs unless the customer asks for it specifically.  We have been grinding our 440 profile for around 3 years because it makes more power.  As far as Cast cam vs. Billet cam, I can tell you we have manufactured thousands of cast cams over the last 32 years with almost zero failures or problems.  In most cases I can get the weight of the cast the same as the billet, in some cases I have got it much lighter.  My cam grinder does not care, but I will say I have many more problems with Billet cams with lobe wear.  Almost all Billet cams have a hard facing weld down the center of the lobe to prevent this.  Almost all Billet cams will wear the lobes without the hard facing weld, which my not be visible with the eye.   

Thanks for the info Mike.
6  Engine Help / Briggs OHV & Vanguard / Re: EC Cam vs Cheetah on: November 13, 2014, 09:28:07 PM
I don't see the notch on the end of the cam for turning the oil pump. Does it not have them?
7  Mower Building / Setup Help / Tires / Re: 3 Spoke Hub's on: October 15, 2014, 10:08:50 PM
That's what I was afraid of.
8  Mower Building / Setup Help / Tires / 3 Spoke Hub's on: October 15, 2014, 09:52:23 PM
Has anyone ran three spoke rear hubs with a 8 x 8 rim. They are 3 on 5.25. A local jr dragster builder has some sweet beadlocks I'm wanting to run but I'm not sure if the hubs are as strong.

9  Engine Help / Briggs OHV & Vanguard / Re: EC Cam vs Cheetah on: October 15, 2014, 07:50:37 PM
Sounds good Jeff, I'm going to try one. I do have the ec roller rockers already.
10  Engine Help / Briggs OHV & Vanguard / Re: EC Cam vs Cheetah on: October 15, 2014, 06:25:12 PM
Hey Jeff, what do you like more on the EC cam over the cheetah?
11  Engine Help / Briggs OHV & Vanguard / Re: Piston Clearance on: October 13, 2014, 09:31:57 PM
The was brand new from briggs and I'm not sure of there sleeving procedure. When I get some time all do some measuring. I think I'll have the machine shop take the lip off the piston which will make it a true flat top and we should be good, but got to do some measuring first.
12  Engine Help / Briggs OHV & Vanguard / Re: Piston Clearance on: October 12, 2014, 09:45:06 PM
Thanks George!
13  Engine Help / Briggs OHV & Vanguard / Re: Piston Clearance on: October 12, 2014, 08:43:56 PM
George, do you guys sell the thicker copper gaskets? Looked on the site and it didn't say how thick they were.
14  Engine Help / Briggs OHV & Vanguard / Re: Piston Clearance on: October 12, 2014, 05:02:30 PM
I'm wondering why it's hitting so much more on the one side.
15  Engine Help / Briggs OHV & Vanguard / Re: Piston Clearance on: October 12, 2014, 04:56:05 PM
How much clearance did you have between the piston and head?   Also what was the piston to wall clearances?

I didn't measure either one, I'll have to put it back together and check that.
From what I am seeing its touching all the way around it. One side maybe a hair more but its all the way around. First off Most stock applications the piston will sit .020 below the deck. These rods tend to put the piston flush with the deck. A gasket once installed is usually about .032. Under load and high rpm these rods can stretch as much as .030. Thats why I have always said .030 minimum between anything moving. Now if this .030 stretch is happening then your only have a .002 safety margin. Not enough in my book. What you need to rectify this is have a .035 to .040 thick Copper head gasket made. But if you look close you will see the piston lip in the carbon on the other side of head. Now you can take roughly .010  maybe a couple more off the piston and fix it also

Thanks for the info George. I'm going to put the short block back together and do some measuring. I figured with the stock gasket I would have plenty of room.
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