[racer254]

Hey XC syclone, how did your 660 do against your 800 prox? I have both an 800 and 600 and I was thinking about making my 600 into a 660 and I was wondering if I would see a difference between a 660 and the 800? What are your thoughts.
Thanks
R254

 

[xc600syclone]

My 660 vs a good friend's '04 ProX800 that was clutched, SLP single, VF's, and jetted - even side-by-side up to about 80mph, then my 660 would pull away from him until we shut it down. Didn't matter what temperature or snow conditions. EASILY, the 660 had longer legs than the 800. Same results with his '02 XC800 (stock).

Have not run it against my 800 - just bought my 800 this spring after the snow melted.

 

[daigle]

Originally posted by xc600syclone@Sep 14 2005, 08:07 PM
My 660 vs a good friend's '04 ProX800 that was clutched, SLP single, VF's, and jetted - even side-by-side up to about 80mph, then my 660 would pull away from him until we shut it down. Didn't matter what temperature or snow conditions.  EASILY, the 660 had longer legs than the 800.  Same results with his '02 XC800 (stock).

Have not run it against my 800 - just bought my 800 this spring after the snow melted.
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wow! that impressive huh? what do you get for power? Who makes the kit?

 

[racer254]

Wow, that is impressive. Thanks for the reply. How did your buddies 800 do against other sleds?

 

[braaap11889]

I know of a kit that carlscycleshop makes thats what I plan on using for my 600.

 

[xc600syclone]

Mine's an Indyhead 660 top-end, with some other special "tricks" I've done to other portions of the intake / carbs / whatnot. Using LRM Twins for my pipes.

As far as HP goes, I'm probably around 145 honest HP. And I have it clutched very, very well. (150+ pulls on track dyno amongst lots of time in the field.)

 

[PolarisNut]

My 660 easily took out a clutched/jetted/gutted box ProX8. It was a buddy of mine. I was pulling on him as soon as we were out of the gate, all the way till the 1/2 mile finish line. The 660 also has much better throttle response.

 

[Greg B.]

hey brappp you may want to talk to carl before getting his. I think his kit is made for high alt. You may want ask him if his kit will work properly at low alt.

 

[braaap11889]

Thanks greg I will have to do that. Isn't the indyhead kit the same as carls? I will give carl a call and talk to him about it.

 

[wrxedge]

I just ordered a Carl's kit, it will work just fine at low alt. They will give you jetting and clutching setups for you application. I'll let you know how it goes once I get it back together and snow arrives.

 

[H20XER]

my buddies lrm 660 kit is 161.2 hp @ 9100 rpm's on lrms dyno

 

[wrxedge]

Originally posted by H20XER@Sep 19 2005, 03:12 PM
my buddies lrm 660 kit  is 161.2 hp @ 9100 rpm's on lrms dyno
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Those are some impressive numbers, do you have any more info on his setup??

 

[xc600syclone]

Originally posted by wrxedge@Sep 19 2005, 04:32 PM
Those are some impressive numbers, do you have any more info on his setup??
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That's a race motor with race pipes on 110. BIG difference between a pump-gas trail motor and a mod motor. Still, LRM makes the best race-motors available, IMHO.

 

[braaap11889]

I plan to run the carls 660 pipe regardless of whether I get the 660 kit I hear it will give me 2-3 lengths over the SLP pipe anyone know if this is true?

 

[xc600syclone]

Carls 660 pipe IS an LRM pipe. Carls purchased the LRM tooling.

Still, I wouldn't do anything but twins on a 600 / 660. Not much (if anything) is gained with a single on the 600 / 660. Twins help about 7-9 actual HP.

 

[H20XER]

yep it is a race motor c12 only with the 14/1 domes not 16/1 domes it is a 150+ hp motor.. lrm twins all the way..

 

[braaap11889]

Originally posted by xc600syclone@Sep 19 2005, 09:53 PM
Carls 660 pipe IS an LRM pipe.  Carls purchased the LRM tooling.

Still, I wouldn't do anything but twins on a 600 / 660.  Not much (if anything) is gained with a single on the 600 / 660.  Twins help about 7-9 actual HP.
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I would love twins but I hear they are a hassle to tune.

 

[xc600syclone]

Originally posted by braaap11889@Sep 20 2005, 06:49 PM
'
I would love twins but I hear they are a hassle to tune.
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Not the LRMs. Quite literally they have been the most hassle-free set of pipes (or pipe) I've ever dealt with.

 

[PolarisNut]

My SLP twins havent been too finicky. Low atm. pressure seems to make the sled a bit lazy, but its not bad. My buddys stock 600 with SLPs seems to be a bit worse. Ran out of time to finish testing, so hopefully this year we'll get it spot on. Part of it may be that he's too scared to run it lean and its just drowning in fuel.

BTW, the carls single wont fit a ProX chassis, edge only...and there is no SLP single for a small block 600.

 

[braaap11889]

Originally posted by PolarisNut@Sep 20 2005, 10:11 PM
My SLP twins havent been too finicky.  Low atm. pressure seems to make the sled a bit lazy, but its not bad.  My buddys stock 600 with SLPs seems to be a bit worse.  Ran out of time to finish testing, so hopefully this year we'll get it spot on.  Part of it may be that he's too scared to run it lean and its just drowning in fuel.

BTW, the carls single wont fit a ProX chassis, edge only...and there is no SLP single for a small block 600.
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I could have sworn there was a single pipe for the 600 pro x but I just checked and I can't find it.
Where can I get a set of LRM twin pipes? How much horsepower do they improve? Would they work good for boondocking and trail riding?