700fi Motor Build - Unleashed UTV

Just for info, My buddy has one of the first 800 Outlanders and we clocked it at 59mph (60 flashed) on GPS. This does not sound impressive, I know, but he was running a track kit. They are strong engines for sure but I don't know if I could justify the cost of the swap.

Hey guys - look the dumb ass opened his mouth again on another forum. lol

Apparently all you have to do it raise your rev and hit it hard

what an idiot- a lesser rev cam, no intake, and minus the displacement is going to be the same? god and people actually listen and buy stuff from him

Thanks for bringing him into this thread!!!

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I just think it is funny that people acually value what he says

I'm with you there.

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Having rode w/Kyle in Florence that day, his machine is tuned very well! Great work by the guys at Unleashed. I think the main thing here is this kit that really give the best of both worlds here in the southwest. You get the low end torque/speed for getting around the big hills at the dunes. But because of the stroker, you can do the slower rock trails without having your rear end come out from under you.

There is always give and take. A stroker engine will not, reliably, run at higher rpms than a smaller stroke conterpart. This is due to the piston speed. As an example, think of two engines, A and R. Engine A has a stroke of "X", while engine B has a stroke of "X+Y". If both engines are turning at a speed of 4000 rpm, the pistons of engine A have less distance to travel than those of engine B. Since both engines are turning at the same rpm, the pistons of engine R have to cover more distance in the same amount of time as the pistons of engine A, resulting in higher piston speeds. Short stroke engines, therefore, can run higher rpm with greater reliability and less stress on the reciprocating assembly. This could be why HW stated he is seeing the same performance by increasing the rev limiter. Although, you'll eventually hit the limits of the valve spring accuaction at very high rpms (why formula 1 engines run a pneumatic valve actuator).

As far as the single cylinder vs. twin cylinder comparisons. You really can't compare (apples to apples). You do the same mods to a V-Twin and get same percentage increases, but you'll always have more torque. Kind of like comparing a big block V6 to a small block V8. The V8 (give the same displacement) will produce more rotational torque (2 more cylinders).

The thing to keep in mind with stroker/big bore kits is the cooling jackets are pretty thin on all these engines (Rhino, Teryx, RZR). The side loading of the stroker and the material removed for the bore, in addition to the higher compression, increase engine heat. This is especially true around the cam lobes. I'm not trying to hijack this thread, but good quality motor oils really decrease engine operating tempatures.

Kudos to Unleashed for all the R&D on getting the FI motor up to the carb guys (without having to replace injectors)! I know Kyle was without his machine for long periods of time that had to KILL him. In the end, great work! Now the reliability testing starts...

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Bob

Does our friend Todd have some dyno sheets he would like to compare??? The ones I have seen on his website are 8 to 9 hp less. I do believe the more hp Todd refers to is the actual reason most of us spend the money for motor mods. Even if you put the stroker in your motor Todd you will not get the same hp out of it.

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Unleashed UTV
5838 N. 19th Ave. (19th Ave & Bethany Home)
Phoenix, AZ
602-246-4011
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[quote=michaeltom401;351329]Great write up Kyle can't wait to dune with you next season. Well said Michaeltom.

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MR RPM's 840 Rotax powered Rhino.

I get my parts at BYC Motorsports
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[quote=QwkRhino;352845]yeah I cant wait- going to be alot of fast or should I say faster guys in the BOOYAA crew camp!!!

[quote=KJSmith84;352852]Ya what really sucks is I am going to have to spend some serious cash on my Teryx just so I can fly by Kyle again.

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Unleashed UTV
5838 N. 19th Ave. (19th Ave & Bethany Home)
Phoenix, AZ
602-246-4011
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[quote=Pgreg;352887]that was you in my mirrors wasnt it? lol

when you coming back to az?

[quote=KJSmith84;352893]Ya that happens alot, me in your mirror

I'll be back Sunday.

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Unleashed UTV
5838 N. 19th Ave. (19th Ave & Bethany Home)
Phoenix, AZ
602-246-4011
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I was in Greg's mirror, you were in mine......















and could have passed me many times over!!!

I have the same 700 w/ +5, 11:1 and cam MSD, Muzzy and pulled 67mph today... I might try changing the clutch weights from stock to get some more. Or even later do some head work and add a intake...

Of course thanks to Jeff (1bddelx) for for the sick tune on my MSD!! :b anana::ban ana:

Good job Kyle and your welcome Bobby, that thing moves. I'm always glad to help.....

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