Does anyone make high compression head for a 01-05 600 anymore?
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Does anyone make high compression head for a 01-05 600 anymore?

This is a discussion on Does anyone make high compression head for a 01-05 600 anymore? within the Polaris forums, part of the Brand Specific Snowmobile Discussion category; I have a 01 xc 600sp that I wanted to put a high compression head on and I can't seem to find any. I know ...

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Thread: Does anyone make high compression head for a 01-05 600 anymore?

  1. #1
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    Does anyone make high compression head for a 01-05 600 anymore?

    I have a 01 xc 600sp that I wanted to put a high compression head on and I can't seem to find any. I know hot seat used to but I searched and can not find one.




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    XC600RMK's Avatar
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    SLP has them but like hotseat they prob don't advertise on their site for older sleds. Best thing is to call them. U can always have the head milled if u cant find any, in that case id be getting another head from ebay or wherever that way u can still keep ur stock head if u have to put it back on.
    You need to put a diaper over ur mouth, cuz that's where all the CRAP is coming from.....

    IM A FRIEND OF FAST,he knows me well....

    2004 Polaris PRO-X 600, lots of add ons and go fast parts.......
    1998 XC600 converted to a RMK, best of both worlds. Lots of add ons and go fast stuff also.....
    My sons, 1998 XC600,450 original miles, lots of add ons,updates and go fast stuff......
    Lil fellas, 1983 Polaris Star 250, clean lil sled made up to look like a sno-x sled....

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    Ya I thought about bringing my head to work and milling some off. How much is still safe for 91 octane gas?

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    is [IMG]http://i1278.photobucket.
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    High compression and 91 octane pump gas will not get along with each other very well,what most don't understand or know about a aftermarket billet head is that the pump gas low altitude domes may only raise static cranking compression a little bit,mileage and piston/ring condition will factor in here,a PG aftermarket head will also only yield minimal hp gains if any st all (don't believe what you read in the makers ads,those numbers are there to fool you into buying it),what the head will do best is improve overall combustion efficiency and cooling,and by simply taking .010 or .015 off the deck of a stock head may raise you compression a bit,but it is also tightening up your squish,which in turn will make the motor more sensitive to fuel quality and will not make any more power,yeah the billet heads sure look nice,but as for the 4-5 hp gains claimed it il be more like 1-2 at best,for the 600 ves I would concentrate on clutching,jetting and gearing,if more power is a must Put a set of twin pipes on it with a good trail port job,and then that is where a billet head and aftermarket Reeds
    will round out the whole package.
    97 INDY 700 SKS-Trail
    98 XC 700-ICE
    99 XCSP 700-Asphalt

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    on stock heads there is always room for some improvement before you cant run pump gas. what is your idea of high compression, pump gas or race?

    you need measure squish and installed volume. to measure installed volume take head off, with 1 piston down some from top put a thin film of grease around the cylinder, roll piston to top and wipe excess grease away. with a 25 cc syringe start adding water to the bottom of the spark plug hole. that is your head volume.

    figure out where you are at now for compression ratio. head volume + cylinder volume divided by head volume.

    for example my head my head volume is 21 cc,+ cylinder volume is 333.67cc =354.67cc divided by 21cc =16.89 to 1 ratio.

    you can easily run squish down to .055" the tighter the squish the less prone to detonation.

    talk to the aftermarket companys and get there opinion on how high can you go with compression ratio on pump gas for your engine.
    your mommas so dumb she threw a rock at the ground and missed.

    your mommas so fat when GOD said let there be light he asked her to move.

    nothing goes like 3 holes!!
    Aaen Performance!!!!
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    is time to make the firewood!!!
     
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    I had "indyhead" do the head work on my prox 700. Ended up with a 12.85:1 ratio. Cut head, then reshaped combustion chamber. Gained 5 hp on Dyno.. Went from 122 to 127hp.
    Last edited by xcr440; 03-10-2014 at 09:25 AM.
    2003 Pro x 700
    almond/blue,10-66, black/red,team 719, T-flow, 440 mains

    1997 XCF 440

    1997 XCR440
    HSP Black,S51HR, Team Sec,19/39,380 main,17.5 PAJ's,ufo's,T-flow below shelf,159 P-4 nozzles, stock 6DH7 needle #2 pos.

    1998 Indy 500

    1987 Sport 340

    Past toys;
    1998 Explorer|1999 F-250 SD V10 | 1997 F-150 SC 5.4L | 1995 F-150 RC 5.0L | 1980 F-150 RC 5.0L | 1980 Chevy CK 1500 350ci 3.4 ton lifted springs |

    1998 XC 700 | 1996 ULTRA SP | 1995 XCR 600 | 1991 RXL | 1992 XCR 440 | 1990 INDY 400 | 1987 INDY 400 | 1987 INDY TRAIL |

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    Alright I might give SLP or hot seat a call. It doesn't sound like I will gain to much but well see. This summer I plan on ripping my sled down and redoing some things probably get some parts powerder coated. I already have the 10/60 weights with the almond blue spring in the primary right now. I plan on changing the helix and spring in the secondary this summer. I would like to put a 1 1/2" or 1 3/4 track with the 136" track USA extensions. What gearing set up should I run to try and stay close or better then the stock set up? I'll be mainly trail and off trail riding this sled. Also if I built a set of twin pipes do I keep the expansion chamber the same size as the stock pipe? Also one more thing my sled has 4000 miles on it so I was gonna do a compression check and probably freshen up the top end. I've always used wiseco pistions in all my dirt bikes and quads so would that brand of pistions be good to use? Or should I just stick with Polaris OEM?

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    If you are asking what size to make the expansion chamber you have no clue about pipes! Do not make a set. Buy a set. there are more to pipes than just slapping some steel together.....

    For the prive and value SPI.
    2003 Pro x 700
    almond/blue,10-66, black/red,team 719, T-flow, 440 mains

    1997 XCF 440

    1997 XCR440
    HSP Black,S51HR, Team Sec,19/39,380 main,17.5 PAJ's,ufo's,T-flow below shelf,159 P-4 nozzles, stock 6DH7 needle #2 pos.

    1998 Indy 500

    1987 Sport 340

    Past toys;
    1998 Explorer|1999 F-250 SD V10 | 1997 F-150 SC 5.4L | 1995 F-150 RC 5.0L | 1980 F-150 RC 5.0L | 1980 Chevy CK 1500 350ci 3.4 ton lifted springs |

    1998 XC 700 | 1996 ULTRA SP | 1995 XCR 600 | 1991 RXL | 1992 XCR 440 | 1990 INDY 400 | 1987 INDY 400 | 1987 INDY TRAIL |

  9. #9
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    compression is where the hp is built. you can only go a slight bit more then stock and still run pump gas.

    stick with the stock single or aftermarket single pipe.

    gear down to a 20-40 is where I would start.
    your mommas so dumb she threw a rock at the ground and missed.

    your mommas so fat when GOD said let there be light he asked her to move.

    nothing goes like 3 holes!!
    Aaen Performance!!!!
    High performance engineering
    millennium technologies
    brtech hoods
    price performance

    Got Speed Racing
    320-629-4889

  10. #10
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    Alright Thanks.

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