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Author Subject: Ecosse opcon Vs Lynx Rotrex supercharger
thomo6

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Registered: 17 Oct 2010

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Post #1
Can some one please advise the differences between the Ecosse opcon and the Lynx Rotrex superchargers. Having searched the internet have found that the opcon conversion is good for approximately 220/230 bhp compared to 250 ish from the Rotex. What's the benefits of either one?

Also what would a second hand Ecosse opcon set up be worth?

Finally anyone aware of a fitting guide for the opcon, as know that their is one for the Lynx.

Thanks in advance.
Posted 11th May 2014 at 10:39
rallyeash

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Location: Devizes

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Post #2
Check out Torque figures, Lynx/Rotrex doesn't make for good torque.

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 11th May 2014 at 11:20
rallyestyle

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Registered: 23 Jul 2003

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Post #3
rallyeash wrote:
Check out Torque figures, Lynx/Rotrex doesn't make for good torque.


Whats considered good though? The unrestricted high boost setups produce more than enough torque id say Unsure

________________________________________

Just Drive It
Posted 11th May 2014 at 12:49
rallyeash

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Post #4
Not compared to the HP they produce!
My impreza had more torque than HP!

A super high boost lump makes 450hp and just over 300lbft. I appreciate that it's still a lot of torque but not in relation to the power. In my opinion makes it feel like a standard engine In some owners words until you get up the revs.

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 11th May 2014 at 12:55
aaron6

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Post #5
I agree ash. I always thought torque figures were low. My impreza also had more torque than bhp.
The pull in the seat was similar to that of a silly boost one. Although the car was only a bit quicker than a low boost.

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 11th May 2014 at 13:22
rallyeash

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Post #6
Yeah the pull on my impreza was really strong as it would be with a 2.5 cosworth built version 9 engine and 400lbft.

I've seen supercharged pugs match the HP and torque. Think AllenAllan runs an eaton which is less power than a Rotrex but runs more torque compared to a LBSC

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 11th May 2014 at 13:26
aaron6

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Post #7
Yeah, im finding these Eaton chargers quite interesting. It'll be nice to see issues ironed out and then put on a track with a low boost.

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 11th May 2014 at 14:06
rich_w

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Location: Havant, Hampshire

Registered: 29 Jul 2004

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Post #8
rallyeash wrote:
Not compared to the HP they produce!
My impreza had more torque than HP!

A super high boost lump makes 450hp and just over 300lbft. I appreciate that it's still a lot of torque but not in relation to the power. In my opinion makes it feel like a standard engine In some owners words until you get up the revs.




That's just how centrifugal S/C deliver power - we wanted them to be driveable, and if we built an equivalent high-boost setup with a Roots or twin-screw type compressor, having a lump of low down torque (like a turbo) would not be driveable on a FWD car.

We wanted to keep the N/A characteristics of the car and engine.

For comparison, our low-boost conversion can produce around 210 ft/lbs torque, I doubt that's any less than the Ecosse conversion.

It depends how you want your power and torque to be delivered really.

________________________________________

Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

Posted 11th May 2014 at 15:16
rallyestyle

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Post #9
Yeah thats what i was thinking, loads of torque in a 4wd/rwd car is great but in a fwd car it's going to spin the wheels up too much Yes

________________________________________

Just Drive It
Posted 11th May 2014 at 19:22
aaron6

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Post #10
True, but with the low boosts you can feel that they wants some more torque.

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 11th May 2014 at 19:42
welshpug!

Capt Pedantic

Location: Bigend, Wales.

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Post #11
indeed, might as well go larger capacity N-A.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 11th May 2014 at 19:44
aaron6

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Post #12
I personally would prefer n/a but do the costs of a 2.1 build on bodies etc exceed the low boost?

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 11th May 2014 at 20:27
welshpug!

Capt Pedantic

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Post #13
Costs would be similar or lower, you'd go 2.2 btw, no extra cost.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 11th May 2014 at 20:31
aaron6

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Post #14
Cool. Didn't someone do it years ago?

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 11th May 2014 at 20:42
Niall

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Location: Epsom

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Post #15
rallyeash wrote:
Yeah the pull on my impreza was really strong as it would be with a 2.5 cosworth built version 9 engine and 400lbft.

I've seen supercharged pugs match the HP and torque. Think AllenAllan runs an eaton which is less power than a Rotrex but runs more torque compared to a LBSC


Well how much is your average LBSC Rotrex? 250BHP? Allens Eaton is running a shade over 250 and iirc about 200lb/ft. Mine is running 190hp and 180lb/ft but thats because my fuel pump was f**ked and had a chronic boost leak. I can safely say that although its only a bit more power (at the moment anyway) than standard, it really has change the way it drives. Peak torque is now at about 3.5k i believe and it feels much more useable than any LBSC Rotrex I've been in.

I know the eatons aren't as efficient as a rotrex but personally, i wouldn't change. Also, the noise is quite addictive Razz
Posted 11th May 2014 at 20:56
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #16
aaron6 wrote:
Cool. Didn't someone do it years ago?


there's a few 205's running them yes.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 11th May 2014 at 20:59
Niall

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Post #17
aaron6 wrote:
Yeah, im finding these Eaton chargers quite interesting. It'll be nice to see issues ironed out and then put on a track with a low boost.


If mine is remapped before FCS then hopefully this will happen Smile
Posted 11th May 2014 at 21:05
rallyeash

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Post #18
If you do book the 11.45 to 1.45 open pit as I'll be out with my 205.

________________________________________

230 hp 2.1 16v XU 205 rallye on jenveysHyper Project thread here
309 3dr K20 Type R
Posted 11th May 2014 at 21:09
RetroPug

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Post #19
What sort of cost would a 2.2 build on bodies likely be out of interest?

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61k miles Ph.1 Diablo '6 Project Thread
Posted 11th May 2014 at 21:12
aaron6

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Post #20
All good questions. You bringing yours to pugfest niall?

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 11th May 2014 at 21:20
Niall

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Post #21
aaron6 wrote:
All good questions. You bringing yours to pugfest niall?


I am mate Smile
By pugfest it will definitely be remapped so be good to go and should see 220-230hp. At the moment now I've fixed the boost leak, as soon as i go about 3psi it runs as lean as f**k as it hasn't been mapped to 6psi yet. Hope to get it done before FCS as well if they have a slot but i suppose they will be bloody busy seeing as its show season!
Posted 11th May 2014 at 21:36
jamiek_uk2000

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Location: Llanelli

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Post #22
Has anyone boosted a 2.2 by any chance?

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"
Posted 11th May 2014 at 21:38
Niall

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Post #23
jamiek_uk2000 wrote:
Has anyone boosted a 2.2 by any chance?


Not that I've seen. Care to try? Can imagine it will either fail epically or be serious win LOL
Posted 11th May 2014 at 21:41
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #24
Rough prices off the top of my head using decent parts (none of this pec/wossner tat) and depends massively on how much you do yourself really, if I was doing it myself I would be assembling it at the least myself.


General machining work £250 (head refinish and block bore)
Pistons and rods, £1200
Cam £200
Inlet £180,
bodies £380
Trumpets £100.
backplate and filter £100.
Mains £35,
Big ends £30,
Thrust bearings £30.
HG £40.
Bolts £15.
Seals £30.
Consumables £100.
Timing belt and water pump £100.

Roughly £2790

you could run it on the standard ecu mapped, or go DTA S40 or similar, budget £550 and £330 on mapping, £80 for bits to make a loom.

probably missed a few bits.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 11th May 2014 at 21:48
RetroPug

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Post #25
Thanks. Something to dream of for the future. Smile
Want a TB'd something in my life at some point.

Probably should have asked what sort of power and performance to expect with that sort of set-up as well, assuming somewhere in the mid 200s and extreme levels of fun?

________________________________________

61k miles Ph.1 Diablo '6 Project Thread
Posted 11th May 2014 at 22:51

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