Author Topic: vanny help!!!!!!!!!!  (Read 6551 times)

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Offline ARC C63

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vanny help!!!!!!!!!!
« on: September 29, 2014, 10:17:44 pm »
ok I have a 35cu vanny with
arc flywheel set at 2 1/2 marks off -
ec big bore that I have cleaned
ec cam
arc rods .100 over
.100 cut pistons
Dual valve springs
valve lash is .003 all four
new e3 plugs .023 gap
new coils at .040 gap
new diod wire
new fuel pump
new fuel filter

mower runs like crap pops and misfires will nice at times then will loss all power stalls out when racing then starts right back up

can any one help me?  im throwing money at it at this poiont :bash: :bash:
C63            NELMRA
class Stock and SPB(aka crash test dumbs)
2010 Stock Class Champine

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Offline George Herrin

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Re: vanny help!!!!!!!!!!
« Reply #1 on: September 29, 2014, 10:40:41 pm »
What have ya done valve and spring wise. I dont know squat about e3 plugs. But .023 is not enough. I run .030 on stock motors. Built I open .002 more at a time till its hard to start then back up .002 to .003 on race motors generally ball park good allaround point .032. Have you done a leak down test. Or even know what it is.
George Herrin #6
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Offline Eatondirt

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Re: vanny help!!!!!!!!!!
« Reply #2 on: September 29, 2014, 10:42:34 pm »
Does it run good for a while and then start acting up?  I don't run that little of valve clearance I would try .004 or .005 some thing to try.  Have you checked to see if you have slipped the flywheel ?
Casey Eaton
Big Dog Mower Racing

Offline George Herrin

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Re: vanny help!!!!!!!!!!
« Reply #3 on: September 29, 2014, 10:46:04 pm »
Also depending on  how new the pistons are you cannot cut the new pistons that much if you do the top ring land breaks or burns off and thus it dont run well either.
Ditto Caseys thought Flywheel key
George Herrin #6
Indian Power.. You gotta Go big to beat em or Go HOME
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My other racer is a 1/5th scale Dirt Late Model!!!!

Offline more4les

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Re: vanny help!!!!!!!!!!
« Reply #4 on: September 29, 2014, 10:46:43 pm »
I run .006 intake, .008 exhaust on all my race engines.

Lester
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Offline ARC C63

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Re: vanny help!!!!!!!!!!
« Reply #5 on: September 29, 2014, 10:52:54 pm »
Im going to bring home my leak down tester and compression tester tomorrow ill also try to open up the lash
C63            NELMRA
class Stock and SPB(aka crash test dumbs)
2010 Stock Class Champine

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Offline leman

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Re: vanny help!!!!!!!!!!
« Reply #6 on: September 30, 2014, 10:16:03 pm »
now that they mention it, the flywheel key would make sense.  Your mower ran awesome at test and tune in the beginning of the year and then all of a sudden, it doesnt like to run or make power like it should...
Nick Lema
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2014... No more DNF's :D

Offline docbro

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Re: vanny help!!!!!!!!!!
« Reply #7 on: September 30, 2014, 10:48:15 pm »
You might also look at the "timing marks" on the flywheel again,  I had one to spin because I didn't torque the bolts well enough.  It will act just like a sheared flywheel key.
Kenny "Doc" Holder
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Offline mikemowerman

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Re: vanny help!!!!!!!!!!
« Reply #8 on: October 06, 2014, 11:46:31 pm »
i also,chased my tail until i realized my flywheel had turned on me.
Mowing daily   lawnmower racing in bc

Offline ethancarter2017

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Re: vanny help!!!!!!!!!!
« Reply #9 on: October 14, 2014, 10:50:08 pm »
Try opening the valve lash .002" and see if it helps it did with mine till the head exploded

Offline Eric (Moose) Mossow

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Re: vanny help!!!!!!!!!!
« Reply #10 on: October 15, 2014, 11:58:37 pm »
listen to lester !  :woo:
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Offline ARC C63

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Re: vanny help!!!!!!!!!!
« Reply #11 on: June 10, 2015, 12:03:14 pm »
sorry that I didn't repost but I found a crack in the left hand exhaust valve. I only found it after the engine was hot and put my bore scope in
C63            NELMRA
class Stock and SPB(aka crash test dumbs)
2010 Stock Class Champine

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Offline BIG AL 202

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Re: vanny help!!!!!!!!!!
« Reply #12 on: June 10, 2015, 02:20:29 pm »
YOU JUST GOT REAL LUCKY! BY A LOTTERY TICKET, LOL!
ALWAYS VOTE FOR ED!   FONGS BROTHER FROM ANOTHER MOTHER!

Offline berthyd

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Re: vanny help!!!!!!!!!!
« Reply #13 on: June 13, 2015, 09:11:26 pm »
Build a Tecumseh!

Bert
Gary Busey and Rick James both used to live in my shop. Redline stole them.

Offline Darkviper

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Re: vanny help!!!!!!!!!!
« Reply #14 on: June 13, 2015, 09:58:53 pm »
All motors we built from brigs and Honda. We had to lap flywheel on else it will snap the keys.
Jonathon Kaup
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