summit plugs WHITE LIKE SNOW YIKES

[imdoo'n]

Sounds like you might have got'er, I suspect if you are already seeing wash that you will be dropping back to 500's/490's at some point, especially since it has already started developing, either way, it's not like its your first time at the rodeo so I know you'll make it run right.

Yeah, I won't be around at Xmas either, heading home, yes buddy bought a new M8 before I even had your info sent...I think he was a little excited...LOL

Feb 27th sounds like it might work, I'll have to see how work is. hope it slows down by then, if so we should explore some new areas.....fire me a PM about who else is coming with ya and we'll go from there.

heard it was an older black pussy, was it named Opra?:d

 

[Warhawk]

Thats what i have heard 460's.. Any problems down at 2000' with the 460's. Was going to start with the 470's first.. Have get my over oiling problem fixed before i start jetting .. using about 1 3/4 per tank..

what altitude are you at spruce grove???. Go ahead and try 460's and let me know how you make out. My elevation is 1849ft .

 

[Warhawk]

heard it was an older black pussy, was it named Opra?:d

Larry have you ever changed the jets in your sled or are they factory 480's?

What do your plugs look like? Whats your elevation at reddeer or do you not do any riding around there??

 

[Warhawk]

Hey this one is to all you guys that are running the 08 and newer summit800's. What does the Knock sensor do when it kicks in???? does it flash a light??? or does it just retard the timing and not let you know??? does it beep and retard the timing????

just curious as in years past with polarass you would just jet them down until the knock sensor would be enitiated and then you would jet back up 2 sizes.

maybe this is how BRP is getting away with such a lean setting
just my 2cents

 

[imdoo'n]

Larry have you ever changed the jets in your sled or are they factory 480's?

What do your plugs look like? Whats your elevation at reddeer or do you not do any riding around there??

yeah, mine are 480's was gong to jet lower, but were right on the money, for colour. elevation near the house 3100 ft runs strong so far.

 

[imdoo'n]

1200 limit????? Not a chance, 1350 is where I start to back off....and call in the choppers.


friggin modman

 

[chrispy]

what altitude are you at spruce grove???. Go ahead and try 460's and let me know how you make out. My elevation is 1849ft .

we are at 2200 i think

 

[BIG HEAD]

No two engines are the same. I had a 07 that I had to go up a jet size for the same reasons as you. That engine seemed to go better than most too????

 

[Warhawk]

okay went out on saturday and had a chance to put on 60 miles. Most of the riding was done in fields with 12inch to 18 inch depths of snow. Temp was right around -13-15 celcius. Did a check on wash and i do have a bit more than i would like. Plugs have a nice brown to them but i could defenitly jet down. I am going to be installing 500's in this week and will be testing those on the the weekend.

If anybody cares to Know BRP recommends 500mains for 2000ft and below at -18celcius and below

could explain why i am as close as i am to being lean.


Yes i know that the manufactures usually error on the rich side so that is why i was concerned to see the litte/no wash with the 480's in.

I will be taking sled to Yellowstone over the Christmas holidays and also will be packing my borescope and 480mains to see what it looks like at 7500ft.

 

[BIG HEAD]

Around that jet size there is different flowing jets even if the numbers get bigger the engine could run lean. There are 520 and 520 n. 520 could be leaner than 500. Do some searching before you go any further. I thought 490 was ok, but after 500 thing went different. caution!

 

[CUSO]

okay went out on saturday and had a chance to put on 60 miles. Most of the riding was done in fields with 12inch to 18 inch depths of snow. Temp was right around -13-15 celcius. Did a check on wash and i do have a bit more than i would like. Plugs have a nice brown to them but i could defenitly jet down. I am going to be installing 500's in this week and will be testing those on the the weekend.

If anybody cares to Know BRP recommends 500mains for 2000ft and below at -18celcius and below

could explain why i am as close as i am to being lean.


Yes i know that the manufactures usually error on the rich side so that is why i was concerned to see the litte/no wash with the 480's in.

I will be taking sled to Yellowstone over the Christmas holidays and also will be packing my borescope and 480mains to see what it looks like at 7500ft.

If you are having problems with plug colour with the stock jetting, your problem is not the jetting. The sled should compensate to sea level and any temperature.

Wash is a long term fueling condition. It takes more than a tank of gas to get a proper wash reading.

 

[Warhawk]

Around that jet size there is different flowing jets even if the numbers get bigger the engine could run lean. There are 520 and 520 n. 520 could be leaner than 500. Do some searching before you go any further. I thought 490 was ok, but after 500 thing went different. caution!

Yes cant remember which is which i will find out.

 

[Warhawk]

If you are having problems with plug colour with the stock jetting, your problem is not the jetting. The sled should compensate to sea level and any temperature.This is not true BRP has a data sheet that contridicts what you are saying. DPM only has so much adjustability and it all starts with a BASE Jet Size.


Wash is a long term fueling condition. It takes more than a tank of gas to get a proper wash reading.

not true you can start to see wash on a piston within a 1/2mile or a couple good pulls up a hill if you know what your looking for. as long as you have a reference before you do the pulls. this is also true when you look at your sparkplugs.

just my .02

 

[Modman]

Around that jet size there is different flowing jets even if the numbers get bigger the engine could run lean. There are 520 and 520 n. 520 could be leaner than 500. Do some searching before you go any further. I thought 490 was ok, but after 500 thing went different. caution!

this is true but reduced flow was only marginal (449 grams /min compared to 453 gpm) but if you were jetting to the 520 for richer then it might be a problem. the 520 acts more like a "495", so it's basically the 500. If you are at the 500 and lean though, and are moving to the 520 to go richer, then you could be in trouble. going the other way in your case darryl so not too much to worry about.

don't jet too rich otherwise you will have nice clean pistons like these....LOL

 

[DaveB]

Main Jet equivalent fuel flow g/min
400 ----- 352
420 ----- 372
440 ----- 392
460 ----- 410
480 ----- 430
500 ----- 453
510n 540 466
520n 560 481
530n 600 491
540n 620 515
550n 660 538
560n 700 572

 

[CUSO]

not true you can start to see wash on a piston within a 1/2mile or a couple good pulls up a hill if you know what your looking for. as long as you have a reference before you do the pulls. this is also true when you look at your sparkplugs.

just my .02

Plug checks are good for a short pull, to see what you are up against.
Wash, IMO you need at least a days riding to see what a TRUE read is.

 

[Warhawk]

Plug checks are good for a short pull, to see what you are up against.
Wash, IMO you need at least a days riding to see what a TRUE read is.

Not sure if you noticed what i said before. I put on 60miles(full Day) did a plug check and also looked at cylinders with a Borescope.

 

[Warhawk]

this is true but reduced flow was only marginal (449 grams /min compared to 453 gpm) but if you were jetting to the 520 for richer then it might be a problem. the 520 acts more like a "495", so it's basically the 500. If you are at the 500 and lean though, and are moving to the 520 to go richer, then you could be in trouble. going the other way in your case darryl so not too much to worry about.

don't jet too rich otherwise you will have nice clean pistons like these....LOL

LOL that looks like my motor on my 99 ZL600 that i use to have years ago. It was cats great efi system. pistons had more wash than that. Once i put on a d&d pipe and chip it was way better almost close to to lean in the mid range but i never drove in the mid range anyway:d


I havent had a chance to look it up yet but then a 520n versues a 520 the 520 N has more fuel flow????

I am running a 520 which equals a 495 or so.

 

[Warhawk]

Main Jet equivalent fuel flow g/min
400 ----- 352
420 ----- 372
440 ----- 392
460 ----- 410
480 ----- 430
500 ----- 453
510n 540 466
520n 560 481
530n 600 491
540n 620 515
550n 660 538
560n 700 572

Thanks Dave great info

 

[Warhawk]

Hey guys heres a good link to wash and Jetting calculations