Carbed 2 stroke turbo guy's !!!

[gus bohne]

Nice welding helmet sir !

I have one too


Gus

 

[Team Voodoo]

Well back at her again tonight. I picked up some argon and built the oil catch can, I even went the extra mile and built a site tube so I can keep an eye on the level.I will get some 90's for the site tube though, it's all I had tonight.

 

[Tonysnoo]

Exept for running out of argon things were going well. I can't get over how fast that little bottle empties, guess I'll get a bigger bottle monday. I made the carb pressure equalizer bar and half welded on for now. I can't get over how easy this stuff is to make. WHO WHOOO!! can't wait to see what a boosted 440 feels like on a 300 lb lay down mod.

I see ya have pressure to the float bowls, but are you going to pressurize the tops of the carbs? or did ya use Gus's hole in the slide trick?

 

[Team Voodoo]

Thanks Tonysnoo

I do have 2 extra barbs in the air box for the spring caps on the carbs, just never tapped them yet.

As for my oil catch can I'm not able to use the braided line because of lack of clearance under the turbo so I welded a heavy gauge pipe to the drain flange. And welded it to the can, I'll brace it up also. Well tonight I worked on the fuel regulator. This seems to be coming together pretty good, I should have my new top end next week to start putting this project together. I could not leave well enough alone so I puched out the cylinders to 488 cc.

 

[Team Voodoo]

I was thinking tonight about the wastegate being factory set around 10 to 12 psi,being a little high to start at sea level trying to tune this sled. Instead of buying a 5 psi wastegate could I not utilized the higher exhaust pipe pressure to open the wastegate. In theory it should open the wastegate earlier being that pipe pressure is 3 to 5 psi higher then air box dropping my boost pressure to 5 to 7 psi. From there if I want higher boost in 1 lbs increments I'll install a manual boost controller and make my way right to 20 lbs.

 

[gus bohne]

Well,, now your thinking like a turbo guy..!!

By all means use pipe pressure.. same as my trail stuff, knocks that down to 3 or 4 psi.. nice..

he has rounds Tony, so he can do the 2 , 6 mm holes thru the slide..
or pressure to tops.

your looking good Mike
Gus

 

[crimsonride]

Quick dumb question. So I received my regulator (aeromotive 13301)

So there's a boost reference line on it but in the instructions it says it's a vacuum/boost reference line.

Isn't my signal a boost signal from the pipe? That wouldn't be vacuum.
Did I get the wrong regulator?

 

[gus bohne]

You are OK, the regulator has a port for boost slash vacum. if you reference the back of the carb behind the slide area when at idle,, you wil have a slighht vacuum that lowers fuel pressure. Once on boost it would go UP with boost pressure.
When referenced to the airbox it sees ONLY boost pressure.
When referenced tot he pipe it sees ONLY pipe presssure, pipe pressure rises before boost builds.
It takes 4 ish' psi of pipe before you build 1 psi of intake boost.

you will see pipe referenced fuel pressure rise with throttle movment .

its the correct part.


for trail use reference the airbox or behind the slide..the pipe reference is sometimes to rich when on off throttle.
Gus

 

[crimsonride]

Good info Gus. That's what I needed to know.

 

[Team Voodoo]

Back at er tonight working on the exhaust, never did nothing on the weekend (HOME RENOS) I really need to get a move on this. Already a couple of inches of ice on the lake. I could not find the nice mandrel bent pipe I wanted so not wasting anytime I went with 1 3/4 exhaust pipe and cut all my bends and welded it together. As for my dented pipe I'l pressurize the pipe while heating the dent and it should come out.

 

[Wheel House Motorsports]

I hope you used stainless for the bend into the turbo, or some thick mild steel.. it doesnt like the heat and tends to fail realy fast.. cracking is so much fun.

looks to be a fun sled though, good luck on the rest of the build.

 

[Team Voodoo]

I hope you used stainless for the bend into the turbo, or some thick mild steel.. it doesnt like the heat and tends to fail realy fast.. cracking is so much fun.

looks to be a fun sled though, good luck on the rest of the build.

Thanks for the info.

I don't really like how the exhaust turned out because of turbo location and thanks for the advice on stainless pipe. For now this is a usable mock up so I can get this beast fired up. I used automotive exhaust pipe. Later on I'll have a stainless steel pipe built at a local shop using my mock up.

Mike

 

[Team Voodoo]

Here's a pic just to give you an ideal how big this sled is it's pretty compact area to work with. I don't think the hood will work with the turbo where it is. I'm thinking maybe a 1979 snopro vintage look.

 

[gus bohne]

low and slow..LOL

naw,, low and fast thats more like it !!


Love the old sno pro look,, ice is starting to happen here too...




Gus

 

[Tonysnoo]

Tony.. by all means post it here too.
i'm sure many of these guys as well as myself would like to keep up with your evolution of turboing 2 strokes as well as learn the ins and outs of the cats..

gus

Hey Gus,

Finally finished my new project and posted pics and some descriptions on the thread below:

http://www.snowestonline.com/forum/showthread.php?p=2521594&posted=1#post2521594

It is EFI, but you can bet I did a lot of bench testing the fuel system that you taught me from this thread. Higher pressures but still a lot of the same concerns.

 

[Tonysnoo]

Just checking in on this thread and seeing how tis year's projects are coming along.

How's voodoo doing?

How about it Gus? What cool stuff are you building this year?

 

[Team Voodoo]

Hey Tony how's it going? How's the new sled treating you?

As for mine it's pretty much done BUTT!! not done if you know what I mean, racing has come apon us so I'm taking out the 440 ufo sled for now with the addition of a 50 shot n20. I was looking forward to running the turbo 440 but building a sled from scratch is time consuming. Once it's done I'll be sure to post a video. With the addition to the turbo I'm also putting in n20 to cool the charge further, it should be interesting.

Take care

Mike

 

[Eli]

Awesome thread, just read it a few days ago. It did cost me a turbo, though-thanks to Gus!

2876 here we come!

 

[Andreas83]

Just read trough the thread. This info is giving me good ideas for what i can do with my old poo 01 gen2 rmk 800.
(Been used as a backup sled for the last couple of years.)
I have som questions..
-I have a Walbro external fuel pump. Its rated to 67 gph. Can I use it?
-A friend of mine has a GT2871R turbo, can i use it?
-Is using 3 power jets, one right after turbo and one in each carb the way to go for fueling?
-I guess I need to get the head machined. I ride at 800ft-4600ft.
-Can I run it on premium pump gas?
-Will i have problems with the electrical system if i run both fuel pump and oil pump?
I have tried to google and find projects that describe the building steps, but cant find any. Any tips for links?

Hope you guys can answer these carbed turbo noob questions.

 

[Tonysnoo]

Just read trough the thread. This info is giving me good ideas for what i can do with my old poo 01 gen2 rmk 800.
(Been used as a backup sled for the last couple of years.)
I have som questions..
-I have a Walbro external fuel pump. Its rated to 67 gph. Can I use it?
Prolly it might even be too big....you need about 35-40 gph at 40-60 psi what is the number on it?

-A friend of mine has a GT2871R turbo, can i use it?
Prolly depends on housings,but that's the one often used with 800

-Is using 3 power jets, one right after turbo and one in each carb the way to go for fueling?
Based on what I have seen Gus say, you only need the two in the carbs or air box. There are other theories however. When you use one in the tube, I believe you will also need to use a hobbs switch.

-I guess I need to get the head machined. I ride at 800ft-4600ft.
Not sure maybe to run low boost and pump?

-Can I run it on premium pump gas?
See above, but it prolly would bring a bigger smile with higher boost and race especially at your ele.

-Will i have problems with the electrical system if i run both fuel pump and oil pump?
As lom
No as your stator is rated for at least 150 watts you will prolly be fine. You may have to give up some lighting or warmers?..

I have tried to google and find projects that describe the building steps, but
cant find any. Any tips for links?

Man you found it right here.....LOL

Hope you guys can answer these carbed turbo noob questions.

Make sure to read the whole thing to get more answers!


I know Gus pretty busy these days with some projects getting ready for racing.

I'll help where I can. I tried to answer up above in your text.

Good luck! It's fun, not cheap!