TURBO, SUPERCHARGER....WHO OR WHICH ONE WOULD YOU BUY?

[rxrider]

And when you finally have it all figured out and your system of choise is up and running, the research goes on and on and on, what gauges do one need, is my clutching up to par, what tracktion products to get, is fuel mapping correct or carbs dealed in correct for temps, boost level, elevation, what changes has to be made in the suspension.

After 1 season my research has not ended yet, I feel that I still have more to learn about boosting and more mods to be done.

Good luck on your choise, whatever kit you purchase you should spank that doo.

BTW make sure you get the xperts help you get your clutching and suspension dealed in before you challenge him to race you.

 

[FAMILYMAN]

I am clutched with heavy hitters and rear suspension is a 136 with transfer straps. The sled pulls a wheelie to 100 mph. I usually can take him, but right before my sled blew he had his dialed in to pull me at the bottom end. Not by much.

Thanks for all the great information. I will be looking.

 

[rxrider]

Going to turbo or sc and you will have to change your clutching quite a bit. First you will need a lot more weight in the primary. I had 49 grams HHs loaded to the max (66.5 grams) and very soft Yamaha primary spring (35/101). It was no way i could keep it off the rev limiter. I now have STMs Supertips in loaded close to 90 grams with the WWW primary spring.

 

[FAMILYMAN]

Vince, I wanted to thank you for you information. It was very helpful.

Clutching...planing on updating that.

I have a temp gage already, is there a special gage needed other then a standard inline style gage?

Most of my riding will be U.P. trails. I do a few lakes, but mainly trails. This sled has only once seen Iowa ditches and dont plan on running it in Iowa unless we get LOTS of snow. I wanted to ride out west this year, but I might have to make a discission. Dont think I will be able to afford the turbo and setups, then duplicated the setups for out west.

 

[HAMMER]

 

[novarossi]

Turbo!! Hands down!! Does not take any power to make power!! FREEE HP!!!

Yea, as free as money that grows on trees?

 

[4Fighter]

I don't have either but I really like Hartman's Supercharger offering.

150 - 180 HP would suit me just fine for flat twisty UP trails, and some stuff across the border. /jm2c's

 

[Yummy]

Is Hartman's SC the same as MPI? One of the statement say DESIGNED BY MPI.

 

[p0wd3rp1l0t]

well i dont know if u have extra money lying around to buy a turbo or a supercharger but if u do then go with one of those but if u want to beat ur buddy, but not have to go through all the complications and what not, u might want to think about nitrous. a 80hp shot will turn ur 03 into a rocketship, and only takes a couple of hours to install, and only minutes to refill. but if ur plannin on going big then go with the supercharger because turbos run a lot hotter and since i live the midwest and some low-snow conditions once inawhile i would stick to a supercharger

 

[BO4RE]

Something that boggles me on the whole supercharger vs turbo debate is the consistent comparison of peak hp to peak hp. I might be willing to sacrifice 20 peak hp at 11000 rpm's in order to have a smoother power delivery or to achieve max boost sooner. I would imagine the boost lag on a turbo must be able to be seen on a dyno chart. Nobody talks aout this stuff and it blows me away. I understand the turbo is more efficent but it certainly is not free hp, if work is being done to spin the turbo it must be more work than not spinning it, more back pressur maybe. I would like to see some dyno charts that compare the same boost , then I could make an educated choice. Anyone woth dyno charts, lets see them. Don't get me wrong I respect the Turbo application I would just want some hard proof supporting why it is better than the supercharger.

 

[powder muncher]

I did ride the MPI supercharger at low boost and with the higher compression pulleys , not sure of the boost anymore. I also tried some turbo set up with about the same amount of power. The smooth power delivery of the turbo with better top was way more ride-able than the supercharger.
the super c was on or of, great for drag racing but I would not want to live with it . Turbo lag even on the rear mounts was not much at all and they keep on pulling hard on a the longer the Pull ( hill-climbing) where the SC goes flat as you climb a thousand feet + in one pull. What I liked the most was the turbo was as easy to trail ride as a stock sled until you opened it up.

Maybe the turbo sleds were set up better than the SC but for me there is only the turbo option after trying out a few different sleds.

 

[BO4RE]

SO would you guys say a sc sled is hard to handle on the trails, too jerky maybe. Also if 2 identicle apexs for instance one with a sc one with a turbo do you guys feel one would outclimb the other, assuming same hp.

 

[HAMMER]

BO4RE -- Not to seem gruff here but it's obvious you have not read all the information that has been posted on this site. Try the "search" function. The topic of Turbos & Superchargers has been discussed several times, at length, on this site, most of the threads provide informative and educational links like the one I posted above. I know this because I have read or posted in the threads discussing these very things you ask. I'll answer a few SC items here, again.

State-of-Tune and Setup...make all the difference in the world.

I own an Apex Mountain with a MPI Stage-I SC:

Runs smooth as silk with the proper Intake Airflow, Air Fuel Ratios, and Clutching

Runs approx 190-200hp at 10lbs boost at 8000ft (maximum compressor speed)

Runs stock timing, stock compression, stock exhaust, 100 octane fuel

Runs a steady 70mph track speed, on 1000+ foot climbs, 50mph ground speeds

That being said:

There are very few "conservative" types, like myself, that will be content with 200hp.

If you need BIG power...the SMALL (300cfm) Stage-I SC is not for you...GO TURBO.

 

[TWIN TURBO]

Hammer is right on as usual. How many times does this need to be said and I realize there are new people coming on line all the time but those of us that have " been there and done that " should all agree. Don't see that.

 

[BO4RE]

My initial post was still regarding dyno graphs. I have searched high and low for these in multiple threads but to no avail I have found none. I can appreciate how the conditions and setup of the sled are crucial in determining how a sled performs, but in other avenues of motorsports this still applies and they have dyno charts. In fact these sledding forums are the only motorsports I have encountered with out them. All I am trying to do is compare baseline figures, clutching and altitude asside. And for those who are frustrated with my line of questioning in regards to these topics being covered already, too bad for you. Just because there is information in other threads similar to this one does not mean you are forced to read it. So if you have been there and done that, good for you, don't reply. As for everyone else that can help, I appreciate any and all info.