Rotrex Supercharger?

[ismo67]

Just tried with engine limiter in 7500rpm.
It does not help much because original cams,springs etc...
Now it does not feel very powerful between 6500 - 7200?
Engine speed comes up slower so it is better to change gear at about 6600-6800? rpm. But when having a little bit higher revs in 2nd gear it really has power already there when changed to 3rd gear. Also maximum pressure was about 0.64bar... have to check if it is leaking somewhere... but it does not mean that i'm unhappy now ...it feels like a crazy machine when pressing the pedal on the bottom in slow road speeds.

 

[Tradewind]

SC is probably not leaking anywhere, just no longer can keep up with engine air demand. And lower boost reading will also contribute to lower eng accel rate

 

[ismo67]

SC is probably not leaking anywhere, just no longer can keep up with engine air demand. And lower boost reading will also contribute to lower eng accel rate

Yep thats might be right also, but just came into my mind that that higher boost pressure was recorded when I had original exhaust. Now I have evertyhing done from headers to end "straight trough" and also deleted the third kat and those biig mufflers. Did put two high flow big cats and x -pipe. Maybe pressure is that's why also little bit lower?

 

[turbotwig]

Have you ever changed the traction fluid hoses or fittings from the cooling/reservoir tank? I have run into the problem where the rollers slip because the supercharger isn't getting enough traction juice to keep the rollers working correctly. Also, any kinks in the feed or return line can cause that too.

-Kirk

 

[ismo67]

Get a second one...lol

Very hard to place it now ... Everything should be rebuilt again...I do not have that kind of money right now to buy that second one and rebuild engine. But that would be f....ing fun motor with two Rotrex. Because, now it's crazy... after two Rotrex it would be insane.

 

[Tradewind]

How often does "traction juice" have to be changed out? I am guessing here but I feel the SC has run out of puff, you have opened up all the restrictions in the exhaust system, this would mean entire system is flowing more air. Maybe you need larger model SC of same brand

 

[ismo67]

Have you ever changed the traction fluid hoses or fittings from the cooling/reservoir tank? I have run into the problem where the rollers slip because the supercharger isn't getting enough traction juice to keep the rollers working correctly. Also, any kinks in the feed or return line can cause that too.

-Kirk

No, not after this installation. And remember :redface: that I got this car with these modifications last autumm and I do not drive it in winter time. I started to drive with it a little bit after some car shows 1.4.06. So, maybe there is only 1000km with that Rotrex fluid (which also seems to be more expensive that gold). Only thing what I have done is that I did put a little bit more Rotrex fluid in reservoir tank and now it is a little bit more than max level...

 

[Tradewind]

All good really, just need bigger blower to make it happen in the 7500 rpm range or as someone suggested ............ use 2

Would hope the traction fluid is good for more than 1000km!! Anyone know how long the fluid will normally last in hot conditions at 9psi boost levels?

 

[turbotwig]

You're not understanding what I'm saying... if the SC doesn't get enough fluid, the rollers will slip and the compressor will not make as much boost as the supercharger is supposed to at that particular SC input shaft RPM (because it's not turning as fast as it should be). This is really the only design downfall I've seen of the Rotrex units. I don't know if they set the "maximum operating speed" based on roller slippage, shaft motion, or perhaps on wheel fatigue concerns. Anyway, what I'm trying to figure out is the disparity between your power output, boost, RPMs, and pulley ratio.

The time we saw it we hunted a mysterious "boost leak" for two days to finally figure out that the banjo fittings we used for the traction fluid lines were too small to allow enough fluid to flow to the supercharger.

The traction fluid is as expensive as gold, and smells very distinct (nasty). That smell sticks around for a while in your nose too. Yeck.

-Kirk

 

[Lextreme II]

Yep thats might be right also, but just came into my mind that that higher boost pressure was recorded when I had original exhaust. Now I have evertyhing done from headers to end "straight trough" and also deleted the third kat and those biig mufflers. Did put two high flow big cats and x -pipe. Maybe pressure is that's why also little bit lower?

When u have less restriction your boost will drop. This is noticeble in Supercharging than turbo. Yes, its normal.

FYI:
If you lower your compression your boost will drop more too.

 

[Tradewind]

Is there a cheaper source of traction fluid, must be something out there that is same

 

[UZZ30-Québec]

maybe it's the same thing as a LSD oil additive.

 

[elhsupra]

Just something else to think about with the rotrex.
http://www.fastcar.co.uk/New_supercharger_really_shifts.YTW4rnJoa2rmWw.html

http://www.antonov-transmission.com/

 

[ismo67]

Just something else to think about with the rotrex.
http://www.fastcar.co.uk/New_supercharger_really_shifts.YTW4rnJoa2rmWw.html

http://www.antonov-transmission.com/

What a f If this so good as they promise !
Would like to see some numbers before and after this baby installed to a car (I mean to ?UZFE)

 

[boostedtundra]

I just finished designing a kit for the new V6 4.0 Tacoma motor I used the C30-94 Rotrex and air to liquid intercooling Stock wheel horsepower was 212 and at 6psi my kit makes 305rwhp and at 8psi 330 I love the rotrex as it produced great low down torque as well as good top end. It is very easy to package.