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Offline joshb1986

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Tvt691
« on: July 12, 2014, 04:22:38 pm »
I have a fully built tvt. New coils plugs valve springs and fuel pump. 125 compression 48 valves. At 5509 rpm I get a miss or like a stutter I can't seem to figure out. It will rev to 8500 but not when under load. Any input will be appreciated!! Thanks
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Offline joshb1986

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Re: Tvt691
« Reply #1 on: July 12, 2014, 05:40:23 pm »
The plugs at ideal get a little black but after running they get white.
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Offline George Herrin

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Re: Tvt691
« Reply #2 on: July 12, 2014, 07:53:09 pm »
What's your high side jet sizes
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George Herrin #6
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Offline joshb1986

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Re: Tvt691
« Reply #3 on: July 12, 2014, 08:45:04 pm »
.042 high .028 low. You have some jets I can buy George?? High end
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Offline George Herrin

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Re: Tvt691
« Reply #4 on: July 12, 2014, 11:04:49 pm »
Biggest I ever run a stock bore was 40's. Are carbs stock or the single cylinder big bore.
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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 joshb1986

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Re: Tvt691
« Reply #5 on: July 12, 2014, 11:11:25 pm »
Big bore carbs.
Do you have extra jets I can buy for high end so I can play around with size.
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Offline George Herrin

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Re: Tvt691
« Reply #6 on: July 13, 2014, 07:31:42 am »
Will look n see what i got. Are u running the 5/16 stem valves if so your floatin the valves. You need Alot OF spring pressure to control them.
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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 joshb1986

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Re: Tvt691
« Reply #7 on: July 13, 2014, 09:43:54 am »
1/4 valves
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Offline George Herrin

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Re: Tvt691
« Reply #8 on: July 13, 2014, 01:19:56 pm »
What spring setup.
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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 joshb1986

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Re: Tvt691
« Reply #9 on: July 13, 2014, 01:42:29 pm »
Dual springs
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Offline George Herrin

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Re: Tvt691
« Reply #10 on: July 14, 2014, 06:15:05 am »
Shim them so that they have .050 gap at full open.
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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!!!!
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