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Teryx 840 Big Bore W/stage Iii Cams Installed, its a monster |
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 Feb 23 2008, 05:16 PM
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#1
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Gunner
 Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts  |
finished the install today and am still breaking the new top end in. have not given it more than half throttle and my vdi has not come back from velocity yet but this thing rips. i will post some pics later of the crank case breather setup that is required with this motor kit. if anyone has any questions about this feel free to ask!
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Feb 24 2008, 10:18 AM
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#2
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Dune Master
 Group: Members Posts: 1,147 Joined: 4-April 05 Member No.: 6,918 Reputation: 0 pts |
Pictures and more info PLEASE!
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Feb 24 2008, 11:16 AM
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#3
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Gunner
Group: Members Posts: 54 Joined: 20-October 07 Member No.: 22,001 Reputation: 0 pts |
Keep us posted, I'm thinking this is the platform for the race build that will answer to the RZR phenom.
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Feb 24 2008, 11:56 AM
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#4
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"Preferred Sponsor"
 Group: Members Posts: 479 Joined: 8-July 03 From: corona,ca Member No.: 3,467 Reputation: 0 pts  |
rzr phenom? built race rhinos still beat rzrs with usually less cc's and one less piston. todd arthurs car is only a 686.
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Feb 25 2008, 03:42 PM
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#5
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"Brotherhood of the Slap"
 Group: Moderators Posts: 4,669 Joined: 15-November 04 From: Long Beach Member No.: 5,760 Reputation: 2 pts  |
Video?
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Feb 25 2008, 07:06 PM
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#6
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Sand Soldier
Group: Members Posts: 323 Joined: 23-May 06 Member No.: 10,977 Reputation: 0 pts |
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Feb 26 2008, 12:44 AM
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#7
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"Brotherhood of the Slap"
Group: Moderators Posts: 4,669 Joined: 15-November 04 From: Long Beach Member No.: 5,760 Reputation: 2 pts |
QUOTE (DA Rhino @ Feb 25 2008, 07:06 PM)   I meant of the 840 in action. If your regarding the so called RZR phenomenon, i already know thats false. It doesnt take much on the track to smoke those suckers 
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Feb 26 2008, 05:34 PM
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#8
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Special ops
 Group: Members Posts: 179 Joined: 11-April 06 From: Sin City, NV Member No.: 10,589 Reputation: 0 pts |
QUOTE (chase @ Feb 23 2008, 05:16 PM) finished the install today and am still breaking the new top end in. have not given it more than half throttle and my vdi has not come back from velocity yet but this thing rips. i will post some pics later of the crank case breather setup that is required with this motor kit. if anyone has any questions about this feel free to ask! Did Fundy build the motor? Are you using the YFZ breather mod with a return to the dimple tapped to the rear cylinder timing chain galley? These are the mods we had to do to our HO KFX motors that were built by either Fundy or Mickey DunLOP! Anything over 80 CHP would blow oil out the breather all over the place. This mod will contain that problem for good. |
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Feb 26 2008, 06:29 PM
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#9
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Gunner
Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts |
i did the motor work but the kit is from Four Stroke Tech, and yes had to do the breather mod using a yfz box.
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Feb 26 2008, 07:50 PM
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#10
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Special ops
Group: Members Posts: 179 Joined: 11-April 06 From: Sin City, NV Member No.: 10,589 Reputation: 0 pts |
Nice... We had an 840 KFX with a 60 shot of spray hit high 60's on Banshee Hill at Dumont. Not bad for an almost 600lb tank of a quad. The 840 should roll the Teryx pretty good. Did you have the heads ported too! Wakes them up alot on the top end. Have fun, gonna hand many a Rhinos a smackin' now.
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Feb 26 2008, 09:12 PM
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#11
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"Brotherhood of the Slap"
Group: Moderators Posts: 4,669 Joined: 15-November 04 From: Long Beach Member No.: 5,760 Reputation: 2 pts |
QUOTE (DesertSportsman @ Feb 26 2008, 07:50 PM) Nice... We had an 840 KFX with a 60 shot of spray hit high 60's on Banshee Hill at Dumont. Not bad for an almost 600lb tank of a quad. The 840 should roll the Teryx pretty good. Did you have the heads ported too! Wakes them up alot on the top end. Have fun, gonna hand many a Rhinos a smackin' now. Would do that stock with a pipe. I dont think a RZR has a chance i hell up against a teryx with a pipe either.. |
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Feb 27 2008, 08:19 AM
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#12
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Special ops
Group: Members Posts: 179 Joined: 11-April 06 From: Sin City, NV Member No.: 10,589 Reputation: 0 pts |
QUOTE (CripKnievel @ Feb 26 2008, 09:12 PM) QUOTE (DesertSportsman @ Feb 26 2008, 07:50 PM) Nice... We had an 840 KFX with a 60 shot of spray hit high 60's on Banshee Hill at Dumont. Not bad for an almost 600lb tank of a quad. The 840 should roll the Teryx pretty good. Did you have the heads ported too! Wakes them up alot on the top end. Have fun, gonna hand many a Rhinos a smackin' now. Would do that stock with a pipe. I dont think a RZR has a chance i hell up against a teryx with a pipe either.. I think that is pushing it, but it wont take much to overcome the RZR. I think airbox opening/jetting, pipe and a clutch spring in the primary will do it. Might need the CDI too to overcome the rev limiter.... BTW I would wait for either LTE or Muzzy to release their version of pipes for the Teryx as those produced the best dyno numbers for the KFX's and Brutes... |
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Feb 28 2008, 07:27 AM
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#13
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Gunner
Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts |
decided not to wait for the muzzy exhaust. built my own headers from mandrel bent steel, the first 12" are 1.5" then stepped it up to 1.625", the shortest i could make the front one was 40.5", the rear i made the exact same length. According to Mickey Dunlap at Four Stroke Tech this is what is needed to really get some high reving hp with this 840. He recommended the size and length of tubing that they had seen the best results with. he did say stay as close to 35" overall but 40.5" was it, i even moved the front header over the flywheel cover instead of under. today i will fab the merge collector and mount the muffler, its a hushpower II shorty with 2.25" in and out. heres some pics, the last one is of the stock front header and the new one i made.
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Feb 28 2008, 01:09 PM
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#14
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Special ops
Group: Members Posts: 179 Joined: 11-April 06 From: Sin City, NV Member No.: 10,589 Reputation: 0 pts |
Nicely done!! Keep me posted how it runs for you. I am holding out for EFI. Had some issues with the CV carbs not liking all the bumps with an open air box with the KFX's. Will go with another Fundy 840 with full port for sure. Should rip!! Later.
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Feb 28 2008, 07:08 PM
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#15
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Gunner
Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts |
finished it up today and it rips. the top end power is awesome, night and day different, with no noticable loss in low end. i am very pleased with the results. need to jet up though. i've got 200 keihen mains in now and its not enough, and i think that is as big as they make them, so tomarrow will drill some out to 5/64 or 3/32 which is what FST recommended. my sandcar has a CBM built 402ci LS2 in it so its takes a lot to put a smile on my face power wise, but this thing did tonight, its fast!
will post finished pics of the exhaust later this evening |
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Feb 28 2008, 09:02 PM
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#16
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Gunner
Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts |
pics
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Feb 28 2008, 09:08 PM
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#17
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"Brotherhood of the Slap"
 Group: Members Posts: 2,273 Joined: 17-February 03 From: Oceanside CA, Phoenix and The Compound Member No.: 3,012 Reputation: 1 pts |
What monster this things going to be! Can't wait to see the finished product. Awesome! What route are you going to go with suspension and cage?
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Mar 1 2008, 10:23 AM
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#18
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Grunt
 Group: Members Posts: 15 Joined: 26-January 08 Member No.: 26,018 Reputation: 0 pts |
LET SEE SOME VIDEO!!!!
QUOTE (DannyG @ Feb 28 2008, 09:08 PM) What monster this things going to be! Can't wait to see the finished product. Awesome! What route are you going to go with suspension and cage? |
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Mar 1 2008, 10:55 AM
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#19
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Gunner
Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts |
going to shoot some video of my teryx drag racing a friends rzr tomarrow. his rzr is stock so its not intended to be a fair race it will just give people an idea what the teryx is easily capable of. should have it up tomarrow morning sometime!
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Mar 1 2008, 11:40 AM
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#20
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Special ops
Group: Members Posts: 120 Joined: 29-November 06 From: So Cal Member No.: 13,542 Reputation: 0 pts |
cant wait to see how this thing rips!!!
 Nice work BTW
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Mar 1 2008, 12:17 PM
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#21
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"Brotherhood of the Slap"
Group: Members Posts: 7,105 Joined: 9-April 07 From: Yucaipa - So Cal Member No.: 17,572 Reputation: 1 pts |
The video should be a good one... nice work on the exhaust! Can't wait to see more!
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Mar 1 2008, 04:58 PM
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#22
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Gunner
Group: Members Posts: 97 Joined: 22-November 05 Member No.: 8,783 Reputation: 0 pts |
had some time to kill today so i grabbed my hand held gps and headed down my driveway in the teryx. i have a paved driveway that has a strait section that is 620ft long with a slight uphill grade before it makes a sharp 90. From a dead stop without flooring it off the line (trying to save my clutch but still left some rubber on the ground) i hit 56.1mph and it was still pulling hard before i had to hit the brakes.
does the rzr still pull hard at 50mph+ ? still planning on some video tomarrow! |
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Mar 1 2008, 05:28 PM
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#23
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Dune Master
Group: Members Posts: 942 Joined: 30-April 06 From: Ramona Member No.: 10,767 Reputation: 0 pts |
Awsome and thanks for sharin
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Mar 2 2008, 01:29 PM
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#24
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Gunner
Group: Members Posts: 61 Joined: 18-January 08 From: GARNETT,KANSAS Member No.: 25,793 Reputation: 0 pts |
good work,lets see some vids!
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Mar 2 2008, 01:41 PM
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#25
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Dune Master
Group: Members Posts: 942 Joined: 30-April 06 From: Ramona Member No.: 10,767 Reputation: 0 pts |
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