Author Topic: Big Bore 49 Intek V-Twin??  (Read 1475 times)

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Offline Brianrich877

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Big Bore 49 Intek V-Twin??
« on: March 27, 2018, 08:30:30 AM »
How big can you bore out a 49 V-Twin Intek Motor? I would like to purchase a new 49 Intek V-Twin motor and try to get 58 Ci out of it. Does anyone know if this is possible? Also is a 14 to 1 compression ratio doable out of an Intek? I currently am running a 44ci Intek and now a guy with a big block Kohler is just walking away on the straight aways on me so looking at more CI to keep up. BTW he has 58CI with 14 to 1 on his Kohler V-Twin.


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Offline PJG56

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Re: Big Bore 49 Intek V-Twin??
« Reply #1 on: March 28, 2018, 06:42:19 AM »
How is your current 44 built??
Paul Guptill  (oppy) #238modX
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Offline PJG56

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Re: Big Bore 49 Intek V-Twin??
« Reply #2 on: March 28, 2018, 07:03:24 AM »
How is your current 44 built??

In order to get 58ci out of a 49 intek you would have to have a bore of 3.600",thats .300"overbore and that's just not going to happen,without some serious block welding and expense and then it wouldn't be legal in BP (engine must remain stock appearing on outside).

A decently built 49 with about 10-1cr is more than you need for a BP mower
Paul Guptill  (oppy) #238modX
2012 slmra mowstock champion(builder/owner)

2013 slmra mowdified champion(builder/owner)
2013 ARMA national champion Mod-X(builder/owner)
2014 ARMA national champion Mod-X(builder/owner)
2014 All American Champion Mod-X/CP(builder/owner)
2014All American Champion FXT (engine builder)
2014 All American 2nd place SP(builder/owner)
2015 All American 2nd place BP (builder/owner)
2016 OutlawTriple Crown FXT Champion (engine builder)


Offline Brianrich877

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Re: Big Bore 49 Intek V-Twin??
« Reply #3 on: March 29, 2018, 01:58:54 PM »
My current BP mower engine has a .020 over bore piston in it with a Precision Cam,  EC double valve springs and roller rockers. The head is a 49 ported and the compression ratio is about 9to1.
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Offline PJG56

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Re: Big Bore 49 Intek V-Twin??
« Reply #4 on: March 29, 2018, 03:57:38 PM »
What precision cam
Paul Guptill  (oppy) #238modX
2012 slmra mowstock champion(builder/owner)

2013 slmra mowdified champion(builder/owner)
2013 ARMA national champion Mod-X(builder/owner)
2014 ARMA national champion Mod-X(builder/owner)
2014 All American Champion Mod-X/CP(builder/owner)
2014All American Champion FXT (engine builder)
2014 All American 2nd place SP(builder/owner)
2015 All American 2nd place BP (builder/owner)
2016 OutlawTriple Crown FXT Champion (engine builder)

Offline rotten ron

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Re: Big Bore 49 Intek V-Twin??
« Reply #5 on: June 17, 2018, 11:54:54 PM »
Inteck heads flow so poorly making the engine bigger will just make the problem worse  A small Vanguard with some ported 23 HP heads will have more power than any Inteck  14 to 1 compression is good but we used 14.5  you will need to "O" ring the heads and use copper gaskets

Offline Johnson Mowersports

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Re: Big Bore 49 Intek V-Twin??
« Reply #6 on: September 08, 2018, 08:35:09 PM »
Inteck heads flow so poorly making the engine bigger will just make the problem worse  A small Vanguard with some ported 23 HP heads will have more power than any Inteck  14 to 1 compression is good but we used 14.5  you will need to "O" ring the heads and use copper gaskets
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Josh

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