Powder Freaks head

snowmanx

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Seen a dyno with the jaws pipe, stock muffler, and his head. 23.7 HP increase . Have heard great things about the jaws on the 850, and heard great things about the just the head mod. I have the complete jaws exhaust, but Freak only dynode with the stock muffler.
Anyone have any experience or first hand knowledge of how this set up would work with the jaws can?

BTW, the exhaust, with SHR clutching works very well . You seriously can feel the seat of the pants difference.

Thanks for any input
 

snow-doo

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Definitely big increase without a fuel control module.I am going to do a little research on this and see if any other mufflers have been tested.Big John said the jaws pipe was good for 10 h.p.with a timing key added.
 
Jul 5, 2001
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Definitely big increase without a fuel control module.I am going to do a little research on this and see if any other mufflers have been tested.Big John said the jaws pipe was good for 10 h.p.with a timing key added.
Timing is added with BUDS system not a key.....
 

Ace Freely

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Definitely big increase without a fuel control module.I am going to do a little research on this and see if any other mufflers have been tested.Big John said the jaws pipe was good for 10 h.p.with a timing key added.

Their website states 13 without a timing bump.

Ace
 
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snow-doo

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Sorry about the timing key remark,don't know what i was thinking.So the jaws pipe will give 10 h.p.with the stock silencer and an ignition upgrade with the ski-doo programmer ? That being said using a jaws pipe you have the dealer reprogram your machine for different ignition curve ? I didn't remember when i called Jaws that they mentioned that.Thanks for your input on this.
 

Ace Freely

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Sorry about the timing key remark,don't know what i was thinking.So the jaws pipe will give 10 h.p.with the stock silencer and an ignition upgrade with the ski-doo programmer ? That being said using a jaws pipe you have the dealer reprogram your machine for different ignition curve ? I didn't remember when i called Jaws that they mentioned that.Thanks for your input on this.

...My understanding is that the Jaws Single gives a 850 with stock head, stock timing, and stock silencer gives the sled a 13 hp bump on 91 fuel.

Ace
 
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portgrinder

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oh I miss these...

sooo is there 23 ponies worth of extra fuel available in stock form, or is the sled going to be a 'touch' lean..?

the pf head does work. ive just head from people who ride every day that when you add a pipe it sometimes runs weird. probably too lean.

just by coincidence, I have made fuel adder keys that help. plug and play. nobody has ever talked about a problem and sold the solution on here before ey?
 

Ace Freely

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Wenatchee, WA
oh I miss these...

sooo is there 23 ponies worth of extra fuel available in stock form, or is the sled going to be a 'touch' lean..?

the pf head does work. ive just head from people who ride every day that when you add a pipe it sometimes runs weird. probably too lean.

just by coincidence, I have made fuel adder keys that help. plug and play. nobody has ever talked about a problem and sold the solution on here before ey?

... so you have some buddies that run both the head and pipe, and have had issues?

Ace
 

snowmanx

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oh I miss these...

sooo is there 23 ponies worth of extra fuel available in stock form, or is the sled going to be a 'touch' lean..?

the pf head does work. ive just head from people who ride every day that when you add a pipe it sometimes runs weird. probably too lean.

just by coincidence, I have made fuel adder keys that help. plug and play. nobody has ever talked about a problem and sold the solution on here before ey?

Just wondering if you could elaborate? Thanks
 

portgrinder

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there are two basic kinds of efi.

open loop - this system just uses programmed data to guess how much fuel to add.

closed loop - these systems read oxygen in the exhaust and know how much fuel to add

unless something has changed that I don't know about, the 850's are open loop. there is only so much fuel going into the engine. so...how does an open loop system know you added a pipe and a head? it doesn't. so you're moving more air thru it and the same amount of fuel = lean.

in stock form they are likely a little rich, so maybe a fella can add 10 ponies and all is fine. but there isn't enough fuel to make 20+ and have it run right. which is what my buddies have found. if you get em too lean by adding too much stuff, they run like junk.

so.. if you want to add big power, you need to add fuel. this used to mean buying a couple brass jets. now you need to buy a box and fiddle around with it.
 
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