Author Topic: EVO 7-77 Seven Cylinder Radial  (Read 315 times)

0 Members and 0 Guests are viewing this topic.

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6375
  • Karma: 228
  • For The Love Of Chainsaws
  • Location: NCO
EVO 7-77 Seven Cylinder Radial
« on: October 14, 2013, 01:29:46 am »
He's running it on Methanol/Synthetic lubricant/Nitro but the engine will also run on 20:1 gasoline and synthetic lubricant.

It has a CD ignition with a single 28 degrees BTC sensor with a PIC chip to program the retard for start and the timed sequence for the other six cylinders besides the master cylinder. It uses seven coils and high voltage lines and 1/4" X 32 spark plugs.

The primary voltage is set up to be 12V on LiPo batteries. This guy makes these ignitions. CH Ignitions  http://ch-ignitions.com/

77cc 6000 rpm looked like a 26 X 10 prop. Looks like a very reliable idle at 1500 but he had it going at 1000. He says it runs 5500 on gasoline with that prop.

https://www.dropbox.com/s/qniseyrprig6hwi/Evo%207-77%20Glow%20.mp4
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Social Buttons


Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4001
  • Karma: 220
  • Location: Carpenter, Wyoming
Re: EVO 7-77 Seven Cylinder Radial
« Reply #1 on: December 20, 2013, 09:37:17 pm »

Wow.   That is really something.   Makes those chainsaw engines look pretty simplistic.
PP 505, 475, 445.

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
Re: EVO 7-77 Seven Cylinder Radial
« Reply #2 on: December 21, 2013, 01:57:16 pm »
I'd say! Amazes me that people just go out and build these things! And your right makes chainsaw engines look crude by comparison!
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 17941
  • Karma: 338
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: EVO 7-77 Seven Cylinder Radial
« Reply #3 on: December 21, 2013, 02:21:40 pm »
 :o :o
REDNECK Saw Repair Getter Done

 

Related Topics

  Subject / Started by Replies Last post
8 Replies
356 Views
Last post January 03, 2013, 06:42:14 pm
by Al Smith
034AV Cylinder

Started by davbell22602 « 1 2 3 4 » Stihl

39 Replies
750 Views
Last post December 13, 2013, 07:07:55 pm
by davbell22602
4 Replies
363 Views
Last post June 19, 2016, 02:15:12 pm
by wudpirat
044 Cylinder

Started by farmboy « 1 2 3 4 » Stihl

38 Replies
796 Views
Last post June 02, 2013, 10:02:21 pm
by HolmenTree
0 Replies
418 Views
Last post June 01, 2013, 12:15:31 am
by 660magnum
19 Replies
336 Views
Last post September 09, 2013, 09:51:10 pm
by doreadeal
1 Replies
276 Views
Last post September 09, 2013, 07:57:15 am
by 660magnum
1 Replies
345 Views
Last post February 06, 2014, 02:14:38 pm
by brettl
4 Replies
63 Views
Last post February 13, 2016, 11:05:35 am
by sharkey
4 Replies
91 Views
Last post November 06, 2016, 10:35:55 am
by SawTroll