2004 T660 Upgrades - Page 3 - ArcticChat.com - Arctic Cat Forum

4 Strokes Z1 Turbo / Z1 / T660

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post #21 of 64 Old 12-22-2016, 05:31 PM Thread Starter
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I'll say it again; I don't care how fast it goes. No ambiguity there. I know it'll go at least 50 and I'm pretty sure it'll make 60.

From what I've read and heard, the non turbo 660's don't suffer the cooling(or lack thereof) issues as their turbocharged brothers. All that said, I probably will make up some scratchers to install.

I took my Panther(400) up to the radar runs up near my other place in Harshaw a couple years ago and it ran 62 without issue.
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"One test is worth a thousand expert opinions"-Alvin "Tex" Johnson...Boeing test pilot

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1994 EXT580/EFI
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post #22 of 64 Old 12-22-2016, 05:51 PM
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It's not the Turbocharged brothers that have a problem, it's the huge engine being cooled off by little heat exchanger tubes designed for a 600 two stroke with cylinders the size of two small coffee cans trying to cool an engine that was in a car. The Turbo does create more heat but it's the heat exchanger volume compared to the engine block coolant volume thats the problem. The touring sleds have longer tubes and a rear exchanger. This is why I created the radiator conversion that I sent you a link to.

And I don't care how fast it goes either, I had one that was enough for me to know, neither ones a rocket ship, just lets be real about the speeds, 60 is more like it, 75 you can forget
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post #23 of 64 Old 12-22-2016, 08:21 PM
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The touring model does have more cooling though, the side exchangers are longer and they have the exchangers in the back.

The NA machines do run noticeable cooler too. Like I've said, I have them both, they run side by side all the time. AC did need to find more exchanger area for the turbo trails though, until I installed scratchers on mine I had some very frustrating days.

Oh and since we're doing old cat pictures....

K
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post #24 of 64 Old 12-22-2016, 10:31 PM Thread Starter
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I have a few IRT's and out of habit I carry one with me when driving one of my old cars or a boat just to check on cylinder head temps/drive temps etc...so I'll include one in my trail kit as well and check it under different trail/snow/ice conditions just to make sure things are staying cool.

"One test is worth a thousand expert opinions"-Alvin "Tex" Johnson...Boeing test pilot

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2004 T660
1994 EXT580/EFI
1973 Panther

Past Sleds
1999 ZR600/EFI
1996 ZRT600
1994 Cougar
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post #25 of 64 Old 12-23-2016, 04:48 AM
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I have a few IRT's and out of habit I carry one with me when driving one of my old cars or a boat just to check on cylinder head temps/drive temps etc...so I'll include one in my trail kit as well and check it under different trail/snow/ice conditions just to make sure things are staying cool.
You can for get your IRT sensor, leave it home and save your bag space. When they do overheat and overheat "ONCE", then it's pretty much all over, you warped the head on a 660.

Like I said, I sent you my link on my radiator conversion, you should have read it. Even if you wouldn't want to install on or can't (The Non-Turbo takes a different radiator) there is still a lot to learn on the 660's cooling system. Like forget the IR gun and install the coolant bypass restrictor, and a temp gauge instead. You need to be watching temps as they start climbing. If you think your going to wait for the temp warning light forget that too. Then it's too late That sensor doesn't activate till it's 240 degrees, way too hot for a 660. Back in the day, when some of us were shopping for 660's we would take a compression testor and check the middle cylinders pressure to see if we had a set of burned rings, melted piston or head gasket. Start with listening to those who have experience with this engine. Install the bypass restrictor and a temp gauge and some scratchers

Last edited by guudasitgets; 12-23-2016 at 04:52 AM.
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post #26 of 64 Old 12-23-2016, 07:05 AM
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You can for get your IRT sensor, leave it home and save your bag space. When they do overheat and overheat "ONCE", then it's pretty much all over, you warped the head on a 660.
I'm sorry, this is a bit over the top, unless your definition of overheated is different then mine.

I bought my TT new in '04, it's very close to having 9,000 miles on it. It's over heated quite a few times and there's zero sign of damage. Now if you got it hot (light on and it in "limp mode") and just kept pounding away on the trail then yes, you could do some damage pretty quickly.

At first I used to just stop, pop the hood and wait. Later on I found that just jumping off the trail/running on the side of the trail where there's loose snow would cool the machine down very quickly so if I could that's route I would take. It really doesn't take much.

I would go an entire season with out my TT overheating, then the next year it would seem to be an issue all the time. The colder and harder packed the snow the wore it is. On a 40 degree day when the snow is soft I can run all day no problem, -10 watch out! Usually on those -10 days it was only a problem early in the morning, after thing warmed up a tad and more sleds hit the trails to bust up the packed snow things where fine.

Scratchers made all the difference for me though. I just keep an eye on the gauge on days I think there's going to be an issue, if the temps start to creep up over 180 and stay there I use them. Pretty simple, no overheating since.

K
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post #27 of 64 Old 12-23-2016, 07:46 AM
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I'm sorry, this is a bit over the top, unless your definition of overheated is different then mine.


K
Nope not over the top, plenty of melted 660's were out there, You may not have had issues but with warmer temps non sledders running them (read Yellowstone Park rental sleds) and nobody watching the trails for at least SOME loose snow they would overheat, yes including the non turbos. Why do you think Cat themselves came out with a radiator kit for the touring and bearcat models, answer? YES! overheating. We have had people on this site pick up used sleds with low compression, meaning lost tension in the middle cylinder rings. Yes it has happened and happened a lot. Most on turbos, but non-turbos are not immune, they have the same heat exchanger arrangement as the Turbos, sled-per-sled. And with my Radiator conversion 4 guys now told me as mine did, it STAYs at 180 and never moves, no matter what. Only way I got mine hotter than that was running it in a 50 degree garage with the doors open

Last edited by guudasitgets; 12-23-2016 at 07:51 AM.
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post #28 of 64 Old 12-23-2016, 07:49 AM
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I went 10 seasons without issue. My only concern was once ice fishing up north last week of March. 3 days of plus temps melted most of the snow on the lakes. During the day there was lots of water / shallow slush so no issue. It was on the last morning the lake froze overnight. Next to nothing for snow on lakes other than protected shoreline. Some bush trails had no snow. I was just as concerned about my Sabercat my son was driving as I was with my T660. Went last season without issue or dropping the scratchers. The guage was a very simple 3 hour project. Only Cat part needed is thermostat CASE gasket.

Current Sled rides
2005 Sabercat 600 EFI LX
2006 T660 Turbo Touring
2016 Bearcat 2000XT

Past Sled rides
1993 Pantera 550 EFI
1980 El Tigre 6000

Current ATV rides
2005 A/C 300 manual 4x4
RTR Bushings & shock bushings


2003 A/C 400 auto 4x4 FIS
RTR Steerlites & Shock Bushings
Motobatt battery
26" Kenda Bearclaw HTR's


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Completed April 8 / 2017

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post #29 of 64 Old 12-23-2016, 07:58 AM
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Again thats all well and good but there were and is an issue with temp on these sleds and damage can occur, plain and simple. Put a gauge in it, get the coolant bypass restrictor (or just make one out of brass bar stock ) and get some scratchers, easy enough.

You wanna never ever have to worry ever again, put the radiator conversion in it
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post #30 of 64 Old 12-23-2016, 08:05 AM
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I think we have said enough already !

Current Sled rides
2005 Sabercat 600 EFI LX
2006 T660 Turbo Touring
2016 Bearcat 2000XT

Past Sled rides
1993 Pantera 550 EFI
1980 El Tigre 6000

Current ATV rides
2005 A/C 300 manual 4x4
RTR Bushings & shock bushings


2003 A/C 400 auto 4x4 FIS
RTR Steerlites & Shock Bushings
Motobatt battery
26" Kenda Bearclaw HTR's


Past ATV rides
2003 A/C 400 manual ACT 4x4
RTR Shock Bushings
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Completed April 8 / 2017

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