+1

 

great post..... I plan on offering it in 2 ways to start out
stock replacement and upgraded boost kit
this is capable of running 28psi

I would expect 20% more power in stock form

 

quieter is the word... it's not silent

I can tell you after driving around in the Rotrex the last few days doing driveability tuning... nothing like having less noise imho

 

I am not trying to do anything except learn. Would you correct or update any of this information that I found. I would rather have several sources of information. Thanks

Eaton has a new series of Roots superchargers with rotors that have a higher helix (more twist) called the TVS series. However, the compressor maps for these shown on Eaton's website are not generated by conforming to the SAE compressor test standards; the numbers are very optimistic. You absolutely cannot draw any comparison whatsoever in efficiency between an Eaton map of a TVS, to a turbocharger map or a Lysholm map. Eaton justifies this by pointing out that a supercharged vehicle isn't driven in a manner similar to the SAE test procedure. This is sort of like having a chassis dyno that reads higher than a Dynojet, and explaining that "You never drive around on a 2,000 lb knurled metal drum so our numbers are accurate as far as we're concerned."
Eaton has a valid point, but without disclosing how they are generating their numbers, the compressor maps they publish are very misleading. They make the TVS seem almost as efficient as some screw compressors, while in reality if you were to run a TVS on a road race or canyon car where things get pushed hard for more than an instant, the supercharger performance would be a different story than the map claims.
You mentioned Harrop's "HTV" version of the TVS; please be aware that it has the same TVS rotors Eaton builds for everyone, just with a rotor housing cast by Harrop. It is not a special TVS and it does not outperform a twin screw in any way other than price. By the way, the reason Harrop casts their own housing is that Eaton does not build aftermarket performance-style TVS rotor housings; they rely on their distributors to do this. Eaton's distribution agreement is pretty detailed; the supercharger housings their distributors build must be marked with an Eaton logo, etc., and the supercharger housing design must be signed off on by Eaton. In the validation process Eaton tests the superchargers - again, they all use the same Eaton guts - so it is noteworthy that the TVS housing made by Harrop is not the highest performing TVS housing compared to similar units produced by some of the other distributors.

 

Thank you - I think you have a lot of people silently following this as their superchargers pile up the miles. I'm sure we'll be looking forward to the first people to install these and the outcomes both on performance and reliability.

Some things I'll be paying attention for: is there specific maintenance one should do to this SC as opposed to the m45? If the stock for stock 20% power increase bares itself out, and this is a similar price to the m45, it will seem to be a no-brainer as long as other things can remain stock like the intercooler. I'd actually prefer if this comes with a new water pump since we'll have to replace that eventually anyway.

Keep the info coming This is fun stuff for a "not going for face-melting acceleration" sort of guy!

mb

 

Nitro, I'm curious as to the sources of your information, if you are going to quote them I would be interested as to who they are.
As for the efficiencies and results, you said yourself in the intercooler thread, you prefer old school testing to the "theorists" getting involved. Well, if Jan is willing to pony up his own money to test these units and find out their true capability on the Mini's is, why try to throw crap on it at this point? Let's see what the testing reveals, no loss out of our pockets.

 

OMG I want 300 hp sooo bad, what's the torque gonna be like with this?

 

Jan has stated this project is going to take time. I don't think it's going to be anywhere near the couple of months everyone seems to think it will be. I'm looking forward to some help on the 900 early spring if I'm lucky.
First the 1320 for his car and strokers. Then for us small 1.6 guys.

 

Yeah, I'd like to know about this as well. I don't particularly mind if I don't have 'normal' power though. What would the baseline hp numbers look like with just this S/C, tune, and injectors? (if you don't mind sharing of course )

The 900 might have just completely changed my modding plans...damn you Jan!

 

as usual we will post all of the numbers once it's done..... just like we do on all of our mods

I would expect even better gas mileage with the new charger

 

Who needs a 2.0L .

Jan came over Monday night and we spent about three hours doing driveability tuning on the Rotrex. For those that don't know the car was down for about 5 weeks while Bell made new (and very trick) end tanks for my intercooler.

Jan had his note pad and would record boost, A/F, timing and others things while we drove and pushed the car. We would come back and he would start playing with the map. We did this over and over and over until we both thought wow, this thing runs awesome!!!

It idles perfect, pulls incredibly smooth through all gears while driving at normal speeds and then just pulls like a freight train when hammered. The power just never stops which is what the Rotrex does best. It just feels awesome now.

Thanks Jan!!

 

Now it's time to get it to the track to see what it does and get more data. I am very happy with the kit. We need to get it to SOW asap

 

Congrats guys Now we need new pics

 

So is the car 100% dialed in or is there still more tuning to be done?

 

driveability is done, final top end tuning needs to be finished

 

Nice. Im sure that a revised hp # is in order...

 

I don't know if my car will be screwed together all that well after the supercharger starts to wear out(around 100,000 miles). So ,Jan I should upgrade while the car is still half way OK, at 65k miles. Maybe I'm in the same large boat as alot of your potential customers. Like the idea thou

 

I'm sure we will run into a bunch of people needing chargers and engine rebuilds. We will have full turn key setups

 

Please also have me on the waiting list.

 

That would be the RMW Crate Motor, in the color of your choice of coarse

 

jan... 2 more years maybe 1 and i will get your stroker and new SC setup! the countdown awaits... Your time around willow springs was better than the viper ACR in road and track! 1 year to get my BA in biology... 2 years to get my BS! Woohoo!

 

scary isn't it

it's nice to see how the internet racers are out talking big game without proving anything...... that's not how we roll

 

how much hp in ur current setup?

 

262whp and 234tq

 

I don't mean to start any kind of argument, and maybe they had the track set up differently in the road and track, but it looked like the Viper ACR time was 68.56 seconds...which would be 1:08 while Jan ran a 1:28. I read this article and was a bit confused about the times since the Lancer Evo MR ran a 73.8 second run. I attributed it to Jan's lack of track hours or something like that. But if I am missing something...then please let me know...Regardless, it's a fast car...