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Rubi 01-02-2012 12:03 AM

OK, what's going on with this 580 Powder Special?
So me and Gerbil are tuning up Cornfedd's new '96 Powder Special. I've got some questions.

What is the deal with this electronic connection on the carbs. It seems like some kind of stoneage TPS or something. Can you remove the wires from the carb bodies so that you can really soak and clean them, or do those things need to stay calibrated like TPS on a set of racks?

Carb venting? It looks like there are two threaded inserts that go into the airbox. Are there supposed to be fittings that screw in there to vent the carbs to the airbox? Right now the carb vents just have about 5" of tubing that goes nowhere. That doesn't seem too effective to me.

What kind of horsepower does the 580 put out? Gerbil seems to think it's pushing 90 HP because it has more displacement than a Liberty 500. I'm thinking closer to 70 because it's not even a case reed induction motor. What does it actually have?

Dirty_Harry 01-02-2012 06:24 AM

Apparently the power was around 95.

The XLT's werent case reed and they were 90-100 hp.

blue avenger 01-02-2012 07:50 AM

just a magnet to sense slide position in case of a stuck slide.

Gotmud 01-02-2012 10:33 AM

Them 580s were good reliable motors with surprising power. I have a couple friends who still have some, one has carb and one has efi.... the carb is faster.

Rubi 01-02-2012 11:55 AM

I didn't believe Harry's 95 HP so I looked around on the web. Impossible to find any real HP numbers. Douchers on the internet say that Indy 500's have 95 to 100 HP. Bullshit. I just find it hard to believe that a piston port motor with roundslide carbs, no exhaust valves, and a y-pipe that's about an inch in diameter could make 95 HP.

Dirty_Harry 01-02-2012 12:16 PM

The XLT's do rubi........

rock2324 01-02-2012 12:17 PM

The xlt 580 made around 90hp so I dont think Harry is too far off.

The Gerbil 01-02-2012 12:21 PM

Maybe DCUBA needs to look into getting a dyno.

Dirty_Harry 01-02-2012 12:23 PM

I think they do, and a sled for harry too.

Rubi 01-02-2012 12:30 PM

Harry, the XLT is a triple. Did the XLT make that much with a single pipe? If the 580 Cat made 95 HP, it was an awesome overachiever. When they made a case reed 600 with powervalves a few years later, it was a horrible underachiever since they only added 16 HP to that number.

The Gerbil 01-02-2012 12:34 PM

I was just doing a little research on arcticchat and some other forum and the consensus on the threads I found was the 580 efi put out 95-100 hp. Couldn't find any real info on the carbed model without actually putting effort into it and that isn't going to happen before noon.

Rubi 01-02-2012 12:44 PM

The most convincing info I found was that they came out with a case reed induction motor in some models in '97 and '98. They claimed 90 for the 500, and 100 for the 600 in that motor. I did find the 95 HP post on Arctic Chat, but I read the whole thread and I'm taking that with a grain of salt. I could easily post on Slednutz that my 600 VES has 142 HP and people would believe it (unless they like Cat or Doo.)

We better get a dyno.... I'm going to sabotage my 600 again to get it back down to 48 psi compression. I want to see what kind of HP I was making then. I want to see Cornfedd's sled on the dyno too. With that clutching he's got, I would think his track horsepower would be astronomical.

The Gerbil 01-02-2012 12:45 PM

We better do some grass dragging with it to get a seat of the pants feel.

Rubi 01-02-2012 12:49 PM

I'll have it back together in awhile. Why don't you come over and we'll put some miles on it? Show California Sledfreak how it's done? Well, that's not possible because after yesterday's all day snowfall, it's getting pretty deep in my yard. No grassdragging over on the eastside!

The Gerbil 01-02-2012 12:56 PM

I have to go pick up my sweet new chair then I will swing over to talk smart.

Rubi 01-02-2012 01:03 PM

Well it's obvious I'm still on the internet and not putting a sled together, but you've got nothing better to do than sit around in my garage while I finish it. You can polish up the clutches while I get the carbs back on.

Ibreakstuff 01-02-2012 01:50 PM

The XLT 580 made 89 hp it's first year. After that it varied a little from year to year. The XCR 580 made slightly more.

Mookie Brown 01-02-2012 01:59 PM

1 Attachment(s)
115 hp at the crank. 25 track hp. This thing has been heavily modded for his ultra agressive buffet style. Most of the energy is funnelled to the Hot Dogger ensuring that this dude's Hot Pockets are perfect every time.

Dirty_Harry 01-02-2012 02:12 PM


Originally Posted by Rubi (Post 117486)
Harry, the XLT is a triple. Did the XLT make that much with a single pipe? If the 580 Cat made 95 HP, it was an awesome overachiever. When they made a case reed 600 with powervalves a few years later, it was a horrible underachiever since they only added 16 HP to that number.

The XLT is a single pipe. The monoblock never came factory triple piped. It was the case reed XCR 600's that came with the pipes.

Ibreakstuff 01-02-2012 02:39 PM

There are 2 XCR 600's - the Aggressive chassis ultra-based 600 (trip pipes) and the Wedge chassis XLT monoblock 580 (single pipe). What's even more confusing is they made both in 96.

Dirty_Harry 01-02-2012 02:45 PM

I thought it was a 597 in 1996? For the monoblock that is.

Dirty_Harry 01-02-2012 03:19 PM

Nevermind, your right. The XLT's were 597's and the xcr was a 580.

Ibreakstuff 01-02-2012 03:21 PM

The 597 XLT was like 98 or 99.

Dirty_Harry 01-02-2012 03:53 PM


Originally Posted by Ibreakstuff (Post 117517)
The 597 XLT was like 98 or 99.


Why would they put the 580 in the XCR and the 597 in the XLT?

The Gerbil 01-02-2012 04:31 PM

The powder special has roared back to life and after it rips pretty hard.

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