General ATV Discussion Discussion Forum for Arctic Cat ATVs

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Old 07-27-2011, 10:39 PM   #31
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SUZUKI'S TL R V Twin 1000 CC makes 105 at the rear wheel

So it is probably 130+ at the Crank

Why is this Arctic Cat 951 so Underpowered, I think the engine
is probably good for 120 horsepower and eventually A C will
bump it up as the need arises, That way they can keep building
the same engine over and over with only a few tweaks here and there
to meet the future competition., So they will only put enough
horsepower in it right now to surpass the XP900 and the Commander 1000.

JERRY
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Old 07-27-2011, 11:15 PM   #32
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Don't know where you hear 130. All Ive ever heard was 90 to 100.

Wheel hp doesn't mean much as a quantitative measurement. It will vary with clutching tire size gearing belt condition. No manufacture release wheel HP.
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Old 07-28-2011, 09:47 AM   #33
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The 130 Horsepower I threw out is for the Suzuki TL 1000 R.

Verify at:

WWW.MCNews.com.au/testing/tl1000r.htm

Quote:
The TLR on test was fitted with Yoshimura pipes and pumped out 119 horsepower at the rear wheel. This compares to the 128 and 132 we got from the Kawasaki ZX9R and Yamaha R1 respectively. (Dyno Charts)

I believe that we will see 95 from the Arctic Cat 951 engine
in the Wild Cat.

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Last edited by quadman15; 07-28-2011 at 09:51 AM.
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Old 07-28-2011, 10:09 AM   #34
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 Quote:
Why is this Arctic Cat 951 so Underpowered, I think the engine
is probably good for 120 horsepower and eventually A C will
bump it up as the need arises, That way they can keep building
the same engine over and over with only a few tweaks here and there
to meet the future competition., So they will only put enough
horsepower in it right now to surpass the XP900 and the Commander 1000
The 951cc engine as we know it is not known for developing it's maximum HP. It uses a de-tuned timing curve were maximum ignition advance is not far enough or fast enough. For instance the Dynatex ignition box where it reaches full advance at 3800 RPM and increases the advance by 3 or 4 more degrees really wakes up the 951. Too bad it doesn't work at 3000-5000 & 7000 RPM. The single small diameter 40mm?? throttle body that older 951's use is way too small in my opinion. It's difficult to compare motorcycle rear wheel HP to ATV rear wheel HP. Most motorcycles only loose 10-15% of crank HP in getting that power transferred via manual transmissions to the ground where a typical CVT system looses about 30% of its crank HP when comparing to rear wheel HP

Whats different between the old 951 and the Wildcat 951? That one link states the wildcat is to have twin 50mm throttle bodies. With throttle bodies that large I'm betting they also performed a little head work; Larger intake and exhaust valves maybe? Perhaps different cam profile? I'm also thinking the ECU may have better ignition curves and ignition advance too. I'm wondering how many of these wildcat parts will retrofit back to the older 951cc's?

Local dealer claims he was told 100 HP for the wildcat. Don't know if this would be crank HP or rear wheel HP though. Most likely crank HP. If it's crank HP then it should be putting about 70HP to the rear wheels where as the old 951 with it's stock 68HP at the crank is putting about 47.5 HP to the ground.
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Last edited by Wyo_H1_Cat; 07-28-2011 at 10:21 AM.
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Old 07-28-2011, 08:01 PM   #35
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It's definately possible we could see 67-70rwhp on the wildcat. Because XP's on average are dynoing in the 60 range on rwhp (pure stock). And it's gonna take high 60's to 70 outrun them, especially with Cat's way of softening the timing on the bottom and the wet clutch system (which we are waiting to find out if it's been changed).
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Old 07-29-2011, 08:18 PM   #36
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if it puts 70 HP to the rear wheels, it is a winner and I will
buy one. LOL
If my wife lets me.

JERRY
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Old 07-29-2011, 09:43 PM   #37
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 Quote: Originally Posted by quadman15 View Post
if it puts 70 HP to the rear wheels, it is a winner and I will
buy one. LOL
If my wife lets me.

JERRY

Red Bold>>>>> spoken like a true Arctic Cat rider.....lol
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Old 07-30-2011, 07:32 AM   #38
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I was wondering if any one knows if the thundercat motor (950) is any quieter than the 700H1? I am not referring to the exhaust sound level. On my mud pro the engine is very noisey (you can't even hear the fan when it comes on until you stop) compared to my other quads that i have had, 650H1, 500 suzuki, etc. Also a friend has a prowler with a 700H1 and you can not hardly talk to your partner next too ya.
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Old 07-30-2011, 09:49 AM   #39
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 Quote: Originally Posted by rjrtools View Post
I was wondering if any one knows if the thundercat motor (950) is any quieter than the 700H1? I am not referring to the exhaust sound level. On my mud pro the engine is very noisey (you can't even hear the fan when it comes on until you stop) compared to my other quads that i have had, 650H1, 500 suzuki, etc. Also a friend has a prowler with a 700H1 and you can not hardly talk to your partner next too ya.

Just curious what this has to do with this thread?
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Old 07-30-2011, 10:13 AM   #40
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 Quote: Originally Posted by blue700 View Post
Just curious what this has to do with this thread?

just a simple question... so far this thread was just a HP argument anyways. until we find out for sure about the wildcat nobody knows.


chances are to answer the question alot of the noise is the clutch system. my 700 is loud but you can still talk over it so im assuming the thundercat is the same
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