Supercharger / power adder

[1turbofocus]

http://www.tts-performance.co.uk/#!ford-duratec-/c1amx

 

This may have been posted already but didnt find it , good looking power adder

 

Tom

[WestTexasS2K]

We use the Rotrex and love it. Its very quiet and compact. We built our own system, but TTS makes great stuff.

[1turbofocus]

Got a link to it ? I do a lot of Focus stuff and may be interested in the brackets and SC , I can make my own piping and IC to fit the Focus

 

I am also tuning the MK3 Focus now and there is nothing out for it yet being it is duratec this may work on it

 

Tom

[SteveS]

I found Tom's TTS cite very interesting. I found this TTS Performance video/dyno results on Youtube (address below). The dyno run results on the video indicate a stock Duratec 2 liter with an hp of 167.67 and with a Rotrex supercharger hp of 319.49 with .9 bar boost. The test was run on a Westfield. This seems absolutely amazing to me. Could anyone tell me the downside of such huge power gains (besides cost) using a supercharger? Wouldn't this be a good way to increase power without rough idling or a sudden power band jump which can occur with headwork etc. . . ?

 

 

Thank you,

Steves

[Alaskossie]

I'm assuming that this s/c installation would require a compression ratio reduction from a stock "tuned" 2L Caterham engine?

[BusaNostra]

I think my Honda s2000 has 11:1 compression and I didn't lower the compression ratio when I installed my own design Rotrex supercharger setup.

[xcarguy]

The video opening references the engine having forged internals and a 10.5:1 CR. I don't know what the stock CR is for a Duratec, but it doesn't sound like it was lowered any for the SC install.

[WestTexasS2K]

Steve when adding that kind of power you always find the next week link. Clutch will most likely need an upgrade to handle the increase torque. Diff was the next weak link in our car. I went thru 4 diffs in one week with my first supercharged car during the One Lap of America. I upgraded to the STI diff and havent had issue since.

 

Aloskessie

We reduced compression ratio on 7evins car when he went with the Rotrex unit. We were assuming boost is boost. Well we later learned that isn't totally true. We talked to Jackson racing who was the importer for the Rotrex supercharger a few years ago. They did a lot of testing on their dry lakes car and found reduced CR wasnt needed. That the pulse wave from the supercharger and turbo it very different and that you could run a significant boost around 10-11 psi on a 11:1 CR with 93 octane fuel. So 7evin redid the engine with 11:1 and picked up about 60hp more. He currently is running 20lbs + boost on a 11:1 motor with e85 and 12lbs on pump gas.

[john hennessy]

has anyone considered using an eaton m62.

 

on the rotrex, what engine management changes were made from the stock pcm?

[BusaNostra]

Yeah, just like WestTexas said..... my clutch went south but my cosworth sierra diff held on. I don't know if anything to do with my added Quaife ATB.

Anyway, my standalone ECU is AEM Ems for S2000 (plug & play) - need to dyno after the rotrex installation. My final AFR is 11:00 - I designed my own system too. You can use Rotrex C-30 and the more powerful C-38. My design can interchange both supercharger in one plate.

Maybe someone here using M62 in other car but could be a little cramp to a 7?

M-62 is a root type ??

The eaton M-45 used for Mini cooper has a potential to fit but not as powerful as M-62.

[Off Road SHO]

So is the Rotrex a Roots style or a Lysolm style of blower. I can'r imagine it being the old Roots style with all of the advancements they have made in the last ten years in the Lysolm (screw type) superchargers.

 

Tom

[BusaNostra]

Here is the Rotrex system: http://www.hotrod.com/techfaq/hrdp_0512_rotrex_supercharger/

[scannon]

Thanks for the Rotrex link. I wish they would have expanded on the overdrive mechanism for getting the impeller speed up into turbocharger range. I've been puzzling over the picture of the three bearings and can't decide how it works. I'm guessing that their referral to traction drive means that the bearings have a traction surface that interacts with the inner circumference of the housing but...

[xcarguy]

Looks like a spin-off (no pun intended) of a ring and planetary gear setup.

[BusaNostra]

Thanks for the Rotrex link. I wish they would have expanded on the overdrive mechanism for getting the impeller speed up into turbocharger range. I've been puzzling over the picture of the three bearings and can't decide how it works. I'm guessing that their referral to traction drive means that the bearings have a traction surface that interacts with the inner circumference of the housing but...

 

Yeah, I wish they explore the rotation close to a turbocharger but there's no way in the hell you can engineer an overdrive and spin it at 90,000 rpm (40,000 rpm @ turbo territory)....still, the system at the mercy of the belt and pulley size. The turbocharger are free wheeling system, some compressor in the hi-performance can go as much as 150,000 rpm.

 

This Rotrex system simply produced air by ratio -- like my tuna fishing reel lol:: -- 15:1.

I think the same concept. lol:

[scannon]

In the link above you will find that Rotrex claims rotation in the area of 90k - 125k due to their traction drive.

 

Rotrex superchargers are capable of step-up ratios ranging from 7.5:1 to as high as 13.0:1, which puts the supercharger into the range of turbocharger efficiency with impeller speeds in the 90,000-125,000-rpm range compared to a suggested high of about 50,000-60,000 rpm for a geardriven blower.

 

I agree that i looks like some kind of planetary drive using the rollers and bearings.