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Author Topic: Another compression question  (Read 4034 times)

Offline SLEEPERBUSA

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Another compression question
« on: April 13, 2012, 09:39:50 PM »
Are the new JE 14.5 pistons to much compression for a pump gas street motor?
Stock deck head and block.
208.6mph/ Texas Mile. 10/24/2010

Offline fvance

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Re: Another compression question
« Reply #1 on: April 14, 2012, 10:10:02 AM »
Probably
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Offline SLEEPERBUSA

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Re: Another compression question
« Reply #2 on: April 14, 2012, 10:43:59 AM »
My old Gen I ran 14:1 on Super, but the GENII is a full time streetbike, so I don't wanna have to mix anything if i'm out somewhere.
208.6mph/ Texas Mile. 10/24/2010

Offline Johnnnycheese

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Re: Another compression question
« Reply #3 on: April 14, 2012, 09:21:56 PM »
gen 2 is a pickey beast not the same as a gen one
 and yes your bearing are ordered :thumb:
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Offline SLEEPERBUSA

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Re: Another compression question
« Reply #4 on: April 14, 2012, 10:32:26 PM »
gen 2 is a pickey beast not the same as a gen one
 and yes your bearing are ordered :thumb:

Thanks. I appreciate that.

What do you mean pickey???
208.6mph/ Texas Mile. 10/24/2010

Offline speedduck

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Re: Another compression question
« Reply #5 on: April 15, 2012, 06:08:19 AM »
14.5 needs wild cams to work with pump gas, you need to loose some working pressure. I had a melted pistons using 1:15 with .445/244 in and .415/244 ex. Maybe some 250-254 cams could do it. And that is with full throttle on a mile.

Offline Johnnnycheese

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Re: Another compression question
« Reply #6 on: April 15, 2012, 12:45:21 PM »
more pickey on the map
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Offline SLEEPERBUSA

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Re: Another compression question
« Reply #7 on: April 15, 2012, 12:58:52 PM »
That's not a problem. I know a guy that can get the map right.
208.6mph/ Texas Mile. 10/24/2010

Offline fvance

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Re: Another compression question
« Reply #8 on: April 15, 2012, 06:47:12 PM »
Who is that?? :hys:
WORLDS FASTEST PRODUCTION MOTORCYCLE
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Offline SLEEPERBUSA

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Re: Another compression question
« Reply #9 on: April 16, 2012, 04:07:46 PM »
That guy up there in that Kawasaki jacket.
208.6mph/ Texas Mile. 10/24/2010

Offline fvance

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Re: Another compression question
« Reply #10 on: April 16, 2012, 04:32:53 PM »
Oh him, I think I know him. :tu:
WORLDS FASTEST PRODUCTION MOTORCYCLE
VANCE & FORSTALL RACING
Top Speed 235 mph
HP by Carpenter & Johnny Cheese  Engine by Knecum
SponsersCATALYST COMPOSITES,JOHNNY CHEESE,KNECUM RACING ENGINES,MURRAY EXHAUST,CARPENTER RACING