Author Topic: EC Cam vs Cheetah  (Read 7691 times)

0 Members and 1 Guest are viewing this topic.

Offline nic_hayes

  • Mow-Forum Junkie
  • ***
  • Posts: 1398
  • Karma: 4
  • Gender: Male
  • Let's Go Racing!
    • View Profile
    • Hayes Mowersports
EC Cam vs Cheetah
« on: October 08, 2014, 09:14:52 pm »
Hey guys, I'm curious to here from someone that has ran a Precision Cheetah cam in a single briggs and then ran the EC billet cam, http://eccarburetors.com/store/en/precision-mower-accessories/mower-engines/model-28-ohv/model-28-ohv-performance/billet-cam.html that they have on there site now. I'm currently running the cheetah in my 33 ohv but I'm considering changing to the EC one. Any opinions?
Nic Hayes - #427 - CP/Mod-X - Small Engine Performace
15 Time Indoor Winter Nationals Champion
2006 Kansas Outlaws Modified Class Champion
http://hayesmowersports.synthasite.com/

Offline nip 19

  • Turf Warrior
  • **
  • Posts: 187
  • Karma: 0
  • Gender: Male
  • if its fast count me in
    • View Profile
Re: EC Cam vs Cheetah
« Reply #1 on: October 08, 2014, 09:35:15 pm »
I've ran both in a 31. Both are great. Cheetah cam seemed to be a little quicker off the corner vs Ec cam came in later but seemed to pull longer.
2011 GLMRA FX champion
2011 SRUSAAO FX champion.   Kevin


Offline nic_hayes

  • Mow-Forum Junkie
  • ***
  • Posts: 1398
  • Karma: 4
  • Gender: Male
  • Let's Go Racing!
    • View Profile
    • Hayes Mowersports
Re: EC Cam vs Cheetah
« Reply #2 on: October 08, 2014, 10:13:44 pm »
My Cheetah pulls great off the corner but just seems to die out halfway down the straightaway.
Nic Hayes - #427 - CP/Mod-X - Small Engine Performace
15 Time Indoor Winter Nationals Champion
2006 Kansas Outlaws Modified Class Champion
http://hayesmowersports.synthasite.com/

Offline nip 19

  • Turf Warrior
  • **
  • Posts: 187
  • Karma: 0
  • Gender: Male
  • if its fast count me in
    • View Profile
Re: EC Cam vs Cheetah
« Reply #3 on: October 08, 2014, 10:33:02 pm »
I prefer the cheetah over the Ec at our local track but I have ran some the Ec cam would have a benefit. If you have wide two or three groove corners the Ec cam might work better due to not lifting the throttle as much.
2011 GLMRA FX champion
2011 SRUSAAO FX champion.   Kevin

Offline nic_hayes

  • Mow-Forum Junkie
  • ***
  • Posts: 1398
  • Karma: 4
  • Gender: Male
  • Let's Go Racing!
    • View Profile
    • Hayes Mowersports
Re: EC Cam vs Cheetah
« Reply #4 on: October 08, 2014, 10:43:59 pm »
Thanks for the info. Will be thinking on this one.
Nic Hayes - #427 - CP/Mod-X - Small Engine Performace
15 Time Indoor Winter Nationals Champion
2006 Kansas Outlaws Modified Class Champion
http://hayesmowersports.synthasite.com/

Offline bimmerbaz

  • Turf Warrior
  • **
  • Posts: 157
  • Karma: 1
  • Gender: Male
    • View Profile
Re: EC Cam vs Cheetah
« Reply #5 on: October 08, 2014, 11:28:44 pm »
Hi Guys,

What sort of RPM do you expect the cheetah cam to start working?

Baz 8)
Go Hard or Go home!


Offline Jeff McKelroy

  • Professor Ducky
  • Turf Warrior
  • **
  • Posts: 890
  • Karma: 10
  • Gender: Male
    • View Profile
Re: EC Cam vs Cheetah
« Reply #6 on: October 13, 2014, 10:37:49 pm »
ABSOLUTELY prefer the EC cam.

Offline nic_hayes

  • Mow-Forum Junkie
  • ***
  • Posts: 1398
  • Karma: 4
  • Gender: Male
  • Let's Go Racing!
    • View Profile
    • Hayes Mowersports
Re: EC Cam vs Cheetah
« Reply #7 on: October 15, 2014, 07:25:12 pm »
Hey Jeff, what do you like more on the EC cam over the cheetah?
Nic Hayes - #427 - CP/Mod-X - Small Engine Performace
15 Time Indoor Winter Nationals Champion
2006 Kansas Outlaws Modified Class Champion
http://hayesmowersports.synthasite.com/

Offline redline

  • # I BROKE IT
  • Mow-Forum Junkie
  • ***
  • Posts: 2342
  • Karma: 24
  • Gender: Male
    • View Profile
Re: EC Cam vs Cheetah
« Reply #8 on: October 15, 2014, 08:03:11 pm »
Once upon a time, a long time ago, my brother in law ran a cheetah cam. Had about a 1200rpm window of doing anything other than just make noise. We then went to Isky. He has a real good grind for Briggs OhV's in fact..
Ed King

71.3% of the time, I'm right every time.

/>http://www.youtube.com/user/tawdew




Offline Jeff McKelroy

  • Professor Ducky
  • Turf Warrior
  • **
  • Posts: 890
  • Karma: 10
  • Gender: Male
    • View Profile
Re: EC Cam vs Cheetah
« Reply #9 on: October 15, 2014, 08:17:34 pm »
Hey Jeff, what do you like more on the EC cam over the cheetah?

Cheetah cams are like Crap-maros and Rust-angs -- too many people drive them. That's a big reason. But:

1. I have found solid increases in volumetric efficiency and dynamic compression ratio, even with stock compression and no head work.
2. 1-Piece billet construction over cast is good enough for me.  I do not know the metallurgy of EC's camshaft, but simply look at the O.D. of the two. That tells you something.
3. Billet construction also allows for more aggressive spring pressures (If that's your thing) and higher RPM without breakage, with either the stock steel or stainless flavors. Exotic metal valves would be a breeze for this little bump-stick.
4. Lightweight camshaft drive sprocket means less rotating weight.
6. I like the idea of having an unmolested cam lobe, not cut down the middle and welded.

IF you insist on stock rocker arms, keep the cheetah. You will bust stock rockers with an EC cam EVERY time, even when using only the outer spring.
 
Given unmodified rocker pedestal height and 2 stock steel pushrods, you may have to machine an additional .05" off the top of the exhaust valve guide, but double check with a light "checker spring" installed so you can measure retainer-to-guide clearance.

Really, a billet camshaft opens up lots of opportunities to the savvy engine builder.

Offline nic_hayes

  • Mow-Forum Junkie
  • ***
  • Posts: 1398
  • Karma: 4
  • Gender: Male
  • Let's Go Racing!
    • View Profile
    • Hayes Mowersports
Re: EC Cam vs Cheetah
« Reply #10 on: October 15, 2014, 08:50:37 pm »
Sounds good Jeff, I'm going to try one. I do have the ec roller rockers already.
Nic Hayes - #427 - CP/Mod-X - Small Engine Performace
15 Time Indoor Winter Nationals Champion
2006 Kansas Outlaws Modified Class Champion
http://hayesmowersports.synthasite.com/

Offline nic_hayes

  • Mow-Forum Junkie
  • ***
  • Posts: 1398
  • Karma: 4
  • Gender: Male
  • Let's Go Racing!
    • View Profile
    • Hayes Mowersports
Re: EC Cam vs Cheetah
« Reply #11 on: November 13, 2014, 10:28:07 pm »
I don't see the notch on the end of the cam for turning the oil pump. Does it not have them?
Nic Hayes - #427 - CP/Mod-X - Small Engine Performace
15 Time Indoor Winter Nationals Champion
2006 Kansas Outlaws Modified Class Champion
http://hayesmowersports.synthasite.com/

Offline George Herrin

  • aka SUPERMAN
  • Superman
  • Highly Mowtivated
  • *
  • Posts: 17732
  • Karma: 102
  • Gender: Male
  • I am going to Race Every Race like its my last one
    • View Profile
    • BTMRA Home/Forum An Independant Club.
Re: EC Cam vs Cheetah
« Reply #12 on: November 13, 2014, 11:00:45 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
George Herrin #6
Indian Power.. You gotta Go big to beat em or Go HOME
8 time ARMA National Champion
4 time USLMRA National Champion
Retired from BP
www.herrinmowersports.yolasite.com
www.allamericanmowerchampionships.yolasite.com
My other racer is a 1/5th scale Dirt Late Model!!!!

Offline MIKE/PRECISIONCAMS

  • Newbie
  • *
  • Posts: 28
  • Karma: 0
    • View Profile
Re: EC Cam vs Cheetah
« Reply #13 on: December 01, 2014, 12:17:43 am »
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.   

Offline George Herrin

  • aka SUPERMAN
  • Superman
  • Highly Mowtivated
  • *
  • Posts: 17732
  • Karma: 102
  • Gender: Male
  • I am going to Race Every Race like its my last one
    • View Profile
    • BTMRA Home/Forum An Independant Club.
Re: EC Cam vs Cheetah
« Reply #14 on: December 01, 2014, 06:06:57 am »
WHAT MIKE SAID
George Herrin #6
Indian Power.. You gotta Go big to beat em or Go HOME
8 time ARMA National Champion
4 time USLMRA National Champion
Retired from BP
www.herrinmowersports.yolasite.com
www.allamericanmowerchampionships.yolasite.com
My other racer is a 1/5th scale Dirt Late Model!!!!

 

anything