Stage 2A and Stage 2B S/C.....

[1CrazySledder]

What are the lowest boost settings I can run with either one on pump fuel? The way I see it, If a guy could run the larger stage II (2B) kit at the same low setting as the smaller stage II just to get his feet wet and gradually work up to 18lbs, then that would be the way to go. Keep inmind though, that on the trail I have no access to race fuel so pump fuel will have to be always used. ( Except on the ice ) Would I even need the larger stage II. I would think that from 14-18lbs of boost, you couldn't use pump gas with that kit?

I'm about to purchase one of the two, I just need to know which one would be better for my usage. I run at about sea level in the northwoods of Wisconsin and the U.P of Michigan. 50% Trail, 50% boon docking. Probably going to be mostly off trail soon as I get more skills. lol

Thanks for the help.....

-1CS

 

[whitee]

I have a stage 1 and it works great but if I did it again I would go bigger just because BIGGERISBETTER but if you cant always get good fuel you dont need a stage 2

 

[whitee]

7.5lbs on pump gas

 

[Apex Man]

Stage 1 super

I'm thinking of going with the low boost version like you because of the fuel. I ride in Quebec every year (as well as MI, PA, NY, OH) and I can't get race fuel up there on the trails. I know a Turbo would be nice with an adjustable waste gate but the install, heat, noise and header failure issues scare we away. I'll go with 7-7.5 PSi with a bypass valve to redirect the "blown off" pressure back into the superchager intake (after the filter) to eliminate the blow-off noise. I like the sleeper thing. If I don't have it (the ability to up the boost) I can't use it and I'll probably be happier in the end anyway. The more boost, the worse the milage and with a 10 gallon tank that would get you in big trouble in Quebec. Another good point is: The more power, the more stress on the motor which relates to
less durability. I bought this 4-stroke because I burned down 2-strokes several times. I don't need this from my 4-stroke so I'll play it safe.
I'm thinking Ulmer's kit is the way to go.

Moon

 

[1CrazySledder]

Maybe, the smaller Stage II is for me then. That kit goes up to 14LBS. Aallen says I can run 12lbs boost on pump fuel with that kit and stacked gaskets. I guess the larger kit, 2B would be a waste of money as I wouldn't never be able to crank it up without the proper fuel.
Okay then, The smaller stage II for me then.

What is the highest boost setting I can run with stage II without the stacked gaskets on pump fuel? I may wait until next season ( 08/09) to tear into the motor.

Thanks for the replies.

-1CS

 

[TurboJamie]

Make sure if you are planning to run stage II blowers at sea level to replace the stock fuel pump.

 

[aja636]

If you do decide to go the Stage 2 route, ask around, I was looking into that and found that some have had issues with the fuel delivery with those kits at sea level. For the bigger fuel pump info contact SPEED in this forum, he is my dad. He will tell you all the info you need about bumping up the fuel system for these blowers at sea level. He used a fuel pump from a nissan car that fits perfect in the tank. I ended up getting the CPR turbo after all the research because with a S/C you can't alter boost depending on fuel and conditions where you run or want to run. Just something to think about. Any way we have had great luck with the MPI blower and Ulmer racing so you picked a good road to go down.

good luck with the boost

aj

 

[Srxspec]

If you want to run pump fuel and don't want to get into the motor run either the 24/24 pulley combination around 10,500 RPM or run 24/26 pulley configuration around 10,700-10,800 (under driving the supercharger a little more than the 24/24 combination).

Stage 2A or Stage 2B will both run at lower boost levels, you would simply have to play with the pulleys a little bit first to find out what combinations make what amount of boost. We have setup a Stage 1 system with the 22/26 pulley combination and 3 head gaskets and it has worked good. With that pulley setup on the Stage 1 though it is simply maxed out boost wise.

The Stage 2A would allow you to go up to 14 lbs maximum (50/50 race & pump fuel passed 11-12 lbs). The Stage 2B would allow you to go up to 18 lbs maximum (same race fuel requirements after 12 lbs). If anyone is ever worried about their grade of fuel carry a 5 gallon jug of 100 octane or something similar in your trailer and in the mornings put 2-3 gallons in before you go out for the day.

10-12 lbs boost with 3 stacked head gaskets has been working for more and more people each season.