So..... 20+lbs through an M1000?

[JSCC]

I am thinking about setting up my sled to handle a serious boost increase.
Wondered what peoples thoughts are on making the engine and related parts handle 20+ lbs of boost.
Will the bottom end take it? compression? head studs? reinforced pipe? etc, etc, etc....

Or am I ?

 

[Dano702]

Im thinking i would go to the 1200 , changing reeds might get old . It will make you smile what ever way you go . Dont worry about the mill Suzuki builds the best 2 stroke sled engines on the planet.

 

[JSCC]

This sled once was a 1200. I would like to keep it a 1000.....just add a little more pressure.
This would only be for certain event's, if you will.....

 

[hatchers]

well the boost actuator on my M8 only goes up to 20lbs...never had the flipper down for more then 4ish secs.....lets say im on the trail doing 60MPH, hit the flipper and the sled thought it had another 100hp, skis up in the air like my rear skid shocks were blown

as i always say, talk to stanger about what a boosted M1000/M12000 can handle, or show me someone who has put on half the miles as he has...you wont

 

[twsandrew]

Jed

I didn't beat you that bad cmon...

JK
A few have seen 18lbs according to Shain and I know Glenn has put well over 20 in the 1200s. I was planning to turn mine up to 18 on Sat but we never got back to a big long hill. I guess the only way to know on your sled is to make it happen. I would say reeds would worry me the most and then leaks around the y pipe gasket etc. Depending on my Apex runs at 20+ mine will see at least 16 or 17 this season.

BTW - you need a track and there is only one right number for legnth

 

[zebiraross]

Jed turn that sh** up!

 

[spoon]

I would worry about over 20 lbs with crank seals and bottom end. One of our guys kept blowing out PTO side bearings at 20+ lbs when his wastegate actuator failed and wouldn't open wastegate. 2 cranks in 4 rides before he figured it out. Inner race would walk out and kill seal. Truth is he should have been watching his boost more carefully and looking for a problem rather than going yeehaw when it overboosted.

 

[JSCC]

I would worry about over 20 lbs with crank seals and bottom end. One of our guys kept blowing out PTO side bearings at 20+ lbs when his wastegate actuator failed and wouldn't open wastegate. 2 cranks in 4 rides before he figured it out. Inner race would walk out and kill seal. Truth is he should have been watching his boost more carefully and looking for a problem rather than going yeehaw when it overboosted.

Good stuff there, thank you!

 

[JSCC]

Jed

I didn't beat you that bad cmon...

JK
A few have seen 18lbs according to Shain and I know Glenn has put well over 20 in the 1200s. I was planning to turn mine up to 18 on Sat but we never got back to a big long hill. I guess the only way to know on your sled is to make it happen. I would say reeds would worry me the most and then leaks around the y pipe gasket etc. Depending on my Apex runs at 20+ mine will see at least 16 or 17 this season.

BTW - you need a track and there is only one right number for legnth

He he ****ar! I am guessing......162?

 

[JSCC]

Jed turn that sh** up!

That's what I am talking about! I knew you would be on my side!!




I do need a track to put the power down.........

But how about compression? I am curious how much people are cutting out of there domes to run higher comp. I highly doubt anyone is making them last at all at high boost with stock compression....

 

[JSCC]

well the boost actuator on my M8 only goes up to 20lbs...never had the flipper down for more then 4ish secs.....lets say im on the trail doing 60MPH, hit the flipper and the sled thought it had another 100hp, skis up in the air like my rear skid shocks were blown

as i always say, talk to stanger about what a boosted M1000/M12000 can handle, or show me someone who has put on half the miles as he has...you wont

I understand that. However, he reads these forums and if he feels like answering, he will.
Otherwise, it's a fun topic that may produce, well, hopefully a ton of power. But more than likely cost me more money....

 

[twsandrew]

Jed I'll be right there with ya. I may not hit 20 but I want to feel 18. Still need to get to 16 first. I lost enough track speed with the 174 that I think I need 16 to be where 14 was last year. That means 18 should be perfect

 

[snowmanx]

Jed I'll be right there with ya. I may not hit 20 but I want to feel 18. Still need to get to 16 first. I lost enough track speed with the 174 that I think I need 16 to be where 14 was last year. That means 18 should be perfect

So what kind of fuel are you using for 14-16#? Are you running a AC 4 roller primary? How much weight are you pulling, and is there a general rule of thumb for how much more weight you need for each # of increase in boost?

Any idea how much HP you are at at 12,14,16, and 18 pounds of boost?

Thanks for any info you can give me.

 

[Vertical-Extreme]

Jed I'll be right there with ya. I may not hit 20 but I want to feel 18. Still need to get to 16 first. I lost enough track speed with the 174 that I think I need 16 to be where 14 was last year. That means 18 should be perfect

that is interesting you say that. with the loss in track speed do you think the 174 was worth it? I was thinking about doing it on my 800 but I wondered about a big track speed loss.
I think 18 to 20 lbs of boost on any thing is about perfect. I am interested in what you have to do to make things hold together. ecspecially reeds

 

[JSCC]

Jed I'll be right there with ya. I may not hit 20 but I want to feel 18. Still need to get to 16 first. I lost enough track speed with the 174 that I think I need 16 to be where 14 was last year. That means 18 should be perfect

We need to get together and try some things out!

 

[jgw50]

I don't have enough miles on mine, and I don't run the boost you guys are talking about, but it seems to me a water / air IC should help keep reeds together longer. From what I have heard the charge temps really kill the reeds? At those boost levels intake temps must be extremely high and water / air really seems to keep them much much cooler (about 50-60 degrees on mine)

I'm only running 10lbs on an m8 with a 153 though, so not in your league, but Andrew is gunna teach me how to climb sometime soon!

 

[JSCC]

That is a good point. I actually has planned to do the exact intercooler that you did prior to this season. However life happened I did not get around to doing it. I would really like to see what you have come up with for your charge cooler in the tunnel. Sounds like it is working great!

 

[genesmob]

I have a DD 1200 with a huge turbo, welded crank, BD intercooler, and huge BD fuel system at low elevation (under 1000ft). A couple weeks ago at the weenie roast in Cable WI we raced it 1/4 mile on semi hardpack snow. I raced it many times at 18 to 22lbs and Glenn raced it at 24.5lbs. Insane pull and no problems with crank seals, pistons or anything else. I havent looked at the reeds since then, but I know they are still sealing. The only problem I had was when I reconfigured the electronic boost controller and screwed up. I rolled into it, it pulled like never before for about 2-3 seconds and then bogged down. It blew the plenum off of the throttle bodies. The datalogger showed 28lbs on that run. Everything was fine, not even a rattled plug. I put the plenum back on, reinforced it,and ran it the rest of the weekend between 18 to 24.5lbs. These motors are really tough and forgiving if things are right and D&Ds 1200 pistons, cylinders, y pipe, pipe and turbo head are the right combination for big boost. I pulled the powervalves and looked at the pistons after that weekend and they look like new.

 

[JSCC]

Thanks for the input.
What is done with the turbo head?

 

[genesmob]

Thanks for the input.
What is done with the turbo head?

Its like a regular 1200 head(stock) with larger squish and lower compression.