MINI2

Lohen · Feb 24th, 2006, 06:01 PM

Now available to buy: Janspeed Manifold with removable high-flow cat

The Janspeed manifold with removable high-flow sports catalyst is one of the best available for the new MINI. The system uses a 4-1 downpipe design with increased diameter bore. As the cat section is removable it easy to change to a de-cat pipe (Available seperately). There are noticable power gains to be had by fitting the manifold and helps to improve mid-range power and torque.

Price: £490 inc.vat

The Janspeed De-cat pipe replaces the high-flow catalyst on the Janspeed Manifold and removable high-flow cat. The pipe is designed as a bolt on item and allows you to quickly change from running a cat to de-cat. Using a de-cat pipe further increases air flow and therefore improves bhp and torque across the whole range. The de-cat pipe is for off road or track use only.

Price: £58 inc.vat

For more information please see our online store at www.lohen.co.uk

Cheers,
Nick

FunkyJMan · Feb 24th, 2006, 08:17 PM

Having mine fitted at Lohen on the 6th March, can't wait

*Vikki* · Feb 27th, 2006, 06:36 PM

Hi , i have been thinking of getting a sports manifold, is there any more information hwere i can read up about them? I was thinking of getting one of the chips but i dont think that will be any good for me as i want to improve the torque etc at lower revs ranges where the chips dont seam to offer that.

T15 Matt · Feb 27th, 2006, 07:20 PM

I've been thinking of a Janspeed system, I want something with a bit of noise and plenty of grunt.

Is the Janspeed what I'm looking for? Is it good value for money?

k m s · Feb 28th, 2006, 01:07 PM

Ordered the Janspeed and the Borla exhaust from Lohen today! Two weeks for the Borla to be delivered, can't wait

obehave · Feb 28th, 2006, 02:05 PM

Based on the pictures. It appears the O2 bung points downward. That isn't really a good thing.

Couldn't find any better pictures so this is based on that tiny picture.

jonnyc · Feb 28th, 2006, 04:53 PM

I would imagine that the cat has been put on upside down... and on the manifold it looks like its the wrong way too but theres loads of spare length in the o2 sensor wire anyways so shouldn't cause any problems...

Just a little slip up by whoever has done the pics/attached the cat... i wouldn't worry tho

JonnyC

obehave · Feb 28th, 2006, 06:22 PM

Pointing straight up would be bad as well.

On second look the rear flange is 90º out so maybe there is something odd going on.
I just want to be sure this doesn't represent the final product.

HObzy · Mar 1st, 2006, 08:57 AM

Quote: Originally Posted by obehave

Pointing straight up would be bad as well.

On second look the rear flange is 90º out so maybe there is something odd going on.
I just want to be sure this doesn't represent the final product.

I have this system and when on the car the placement of the sensor hole is exactly where it is on the original cat.

and in the same place on the decat pipe.

T15 Matt · Mar 1st, 2006, 07:50 PM

Quote: Originally Posted by Max

er? you have not heard my car then Matt?

I'll be listening out for it on Sunday!!

TallAndy · Mar 1st, 2006, 09:33 PM

I saw this manifold today whilst at Lohen it looks very good, the port sizes on the head are also larger than on the miltek manifold.

It looks very similar to the GTT manifold!

obehave · Mar 2nd, 2006, 02:36 AM

Quote: Originally Posted by HObzy

I have this system and when on the car the placement of the sensor hole is exactly where it is on the original cat.

and in the same place on the decat pipe.

Thanks.
It looks like a nice piece.

roland2003 · Mar 2nd, 2006, 11:50 AM

Looks similar but differs in that the GTT product uses TIG welding throughout ( mostly mig on the janspeed one) and the GTT secondary pipe diameter is 6.5 mm larger in diameter than the Janspeed.
New GTT 'fat cat' GTT Mk2 manifold coming very soon!
Regards Roland GTT

obehave · Mar 2nd, 2006, 11:56 AM

Quote: Originally Posted by roland2003

Looks similar but differs in that the GTT product uses TIG welding throughout ( mostly mig on the janspeed one) and the GTT secondary pipe diameter is 6.5 mm larger in diameter than the Janspeed.
New GTT 'fat cat' GTT Mk2 manifold coming very soon!
Regards Roland GTT

If I recall correctly secondary pipe diameter will affect the rpm where the header is most efficient thereby affecting the torque range.
Would not the larger pipe be more applicable to higher rpm requirements like tracking whereas the smaller diameter would be more effective on the street?

All of my experience with this is on NA V8s so I'm not sure of the influence these dimensions will have on our little SC'd motor.

Thoughts from Lohen and GTT, and anyone else for that matter, would be appreciated.

roland2003 · Mar 2nd, 2006, 12:50 PM

Hi Obe,The primary length in conjunction with exhaust valve timing effects the rpm at which the 'cylinder scavenging' occurs.The minimum 'calculated' primariy diameter for this car should be
1.5 " and secondary 2.75" (I know thats very big!). We currently use 2.5", the new version will be 2.75". The secondary should be the same dia.as the system as is part of it as far as the gas is concerned. The bigger diameter the secondary the better the scavenging ie a bigger negative pressure pulse travelling back up to the cylinder to not only suck out the last bit of exhaust gas but also suck more inlet in . Remember both inlet & exhaust valves are open at TDC 'valve overlap.' allowing us to take advantage of this sucking effect.
Turbo cars benefit from a very large diameter first section of exhaust,even if it then reduces down in diameter further downstream. It allows the turbulant flow to break up into a laminate flow reducing backpressure. Basically gas corkscrewing down the pipe has to travel much further .
I'll put more input into this on the new thread I'll start soon regarding our new Mk2 sports cat &manifold.And yes the system in an ideal world needs to be 2.75 (3"

) idealy too.

Regards Roland GTT

obehave · Mar 2nd, 2006, 01:43 PM

Quote: Originally Posted by roland2003

Hi Obe,The primary length in conjunction with exhaust valve timing effects the rpm at which the 'cylinder scavenging' occurs.The minimum 'calculated' primariy diameter for this car should be
1.5 " and secondary 2.75" (I know thats very big!). We currently use 2.5", the new version will be 2.75". The secondary should be the same dia.as the system as is part of it as far as the gas is concerned. The bigger diameter the secondary the better the scavenging ie a bigger negative pressure pulse travelling back up to the cylinder to not only suck out the last bit of exhaust gas but also suck more inlet in . Remember both inlet & exhaust valves are open at TDC 'valve overlap.' allowing us to take advantage of this sucking effect.
Turbo cars benefit from a very large diameter first section of exhaust,even if it then reduces down in diameter further downstream. It allows the turbulant flow to break up into a laminate flow reducing backpressure. Basically gas corkscrewing down the pipe has to travel much further .
I'll put more input into this on the new thread I'll start soon regarding our new Mk2 sports cat &manifold.And yes the system in an ideal world needs to be 2.75 (3"

) idealy too.

Regards Roland GTT

Thanks.
Maybe once again an NA thing but larger primaries also reduce gas velocity faster than smaller diameter tubes. This affects primary and secondary tube length.
All this in turn impacts the effective optimal rpm at which the header is most efficient.

Correct?

Feb 24th, 2006, 06:01 PM	#1
Lohen New Mini Specialists Join Date: Oct 2004 Location: Staffordshire, UK Local Time: 10:52 AM Posts: 835 Offline	NEW! Janspeed Manifold and removable high-flow cat Now available to buy: Janspeed Manifold with removable high-flow cat The Janspeed manifold with removable high-flow sports catalyst is one of the best available for the new MINI. The system uses a 4-1 downpipe design with increased diameter bore. As the cat section is removable it easy to change to a de-cat pipe (Available seperately). There are noticable power gains to be had by fitting the manifold and helps to improve mid-range power and torque. Price: £490 inc.vat The Janspeed De-cat pipe replaces the high-flow catalyst on the Janspeed Manifold and removable high-flow cat. The pipe is designed as a bolt on item and allows you to quickly change from running a cat to de-cat. Using a de-cat pipe further increases air flow and therefore improves bhp and torque across the whole range. The de-cat pipe is for off road or track use only. Price: £58 inc.vat For more information please see our online store at www.lohen.co.uk Cheers, Nick Attached Thumbnails New MINI Specialists www.lohen.co.uk

Mar 2nd, 2006, 11:50 AM	#13 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 10:52 AM Posts: 2,654 Offline	Looks similar but differs in that the GTT product uses TIG welding throughout ( mostly mig on the janspeed one) and the GTT secondary pipe diameter is 6.5 mm larger in diameter than the Janspeed. New GTT 'fat cat' GTT Mk2 manifold coming very soon! Regards Roland GTT www.gttuning.com

Mar 2nd, 2006, 12:50 PM	#15 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 10:52 AM Posts: 2,654 Offline	Hi Obe,The primary length in conjunction with exhaust valve timing effects the rpm at which the 'cylinder scavenging' occurs.The minimum 'calculated' primariy diameter for this car should be 1.5 " and secondary 2.75" (I know thats very big!). We currently use 2.5", the new version will be 2.75". The secondary should be the same dia.as the system as is part of it as far as the gas is concerned. The bigger diameter the secondary the better the scavenging ie a bigger negative pressure pulse travelling back up to the cylinder to not only suck out the last bit of exhaust gas but also suck more inlet in . Remember both inlet & exhaust valves are open at TDC 'valve overlap.' allowing us to take advantage of this sucking effect. Turbo cars benefit from a very large diameter first section of exhaust,even if it then reduces down in diameter further downstream. It allows the turbulant flow to break up into a laminate flow reducing backpressure. Basically gas corkscrewing down the pipe has to travel much further . I'll put more input into this on the new thread I'll start soon regarding our new Mk2 sports cat &manifold.And yes the system in an ideal world needs to be 2.75 (3" ) idealy too. Regards Roland GTT www.gttuning.com

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Feb 24th, 2006, 08:17 PM	#2 (permalink)
FunkyJMan MINI Mover Join Date: Nov 2004 Location: Gloucester Local Time: 10:52 AM Posts: 91 Offline	Having mine fitted at Lohen on the 6th March, can't wait

Feb 27th, 2006, 06:36 PM	#3 (permalink)
Vikki Winner MM best MINI ONE! My Classifieds Join Date: Jun 2004 Location: St Leonards-on-Sea Local Time: 10:52 AM Posts: 1,989 Offline	Hi , i have been thinking of getting a sports manifold, is there any more information hwere i can read up about them? I was thinking of getting one of the chips but i dont think that will be any good for me as i want to improve the torque etc at lower revs ranges where the chips dont seam to offer that.

Feb 27th, 2006, 07:20 PM	#4 (permalink)
T15 Matt MINI2 Regular Join Date: Oct 2005 Location: Trackside Local Time: 10:52 AM Posts: 103 Offline	I've been thinking of a Janspeed system, I want something with a bit of noise and plenty of grunt. Is the Janspeed what I'm looking for? Is it good value for money?

Feb 28th, 2006, 01:07 PM	#5 (permalink)
k m s Premier League Join Date: Sep 2005 Location: In the Tilton Local Time: 10:52 AM Posts: 1,114 Offline	Ordered the Janspeed and the Borla exhaust from Lohen today! Two weeks for the Borla to be delivered, can't wait

Feb 28th, 2006, 02:05 PM	#6 (permalink)
obehave Mini Mod Join Date: Sep 2002 Local Time: 05:52 AM Posts: 9,254 Offline	Based on the pictures. It appears the O2 bung points downward. That isn't really a good thing. Couldn't find any better pictures so this is based on that tiny picture.

Feb 28th, 2006, 04:53 PM	#7 (permalink)
jonnyc MINI2 Regular Join Date: Jun 2003 Local Time: 09:52 AM Posts: 0 Offline	I would imagine that the cat has been put on upside down... and on the manifold it looks like its the wrong way too but theres loads of spare length in the o2 sensor wire anyways so shouldn't cause any problems... Just a little slip up by whoever has done the pics/attached the cat... i wouldn't worry tho JonnyC

Feb 28th, 2006, 06:22 PM	#8 (permalink)
obehave Mini Mod Join Date: Sep 2002 Local Time: 05:52 AM Posts: 9,254 Offline	Pointing straight up would be bad as well. On second look the rear flange is 90º out so maybe there is something odd going on. I just want to be sure this doesn't represent the final product.

Mar 1st, 2006, 08:57 AM	#9 (permalink)
HObzy MINI2 Senior Join Date: Oct 2003 Location: Stressville Local Time: 10:52 AM Posts: 1,002 Offline	Quote: Originally Posted by obehave Pointing straight up would be bad as well. On second look the rear flange is 90º out so maybe there is something odd going on. I just want to be sure this doesn't represent the final product. I have this system and when on the car the placement of the sensor hole is exactly where it is on the original cat. and in the same place on the decat pipe.

Mar 1st, 2006, 07:50 PM	#10 (permalink)
T15 Matt MINI2 Regular Join Date: Oct 2005 Location: Trackside Local Time: 10:52 AM Posts: 103 Offline	Quote: Originally Posted by Max er? you have not heard my car then Matt? I'll be listening out for it on Sunday!!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Mar 1st, 2006, 09:33 PM	#11 (permalink)
TallAndy Taller Than You! My Classifieds Join Date: Jul 2003 Location: Bolton Local Time: 10:52 AM Posts: 1,149 Offline	I saw this manifold today whilst at Lohen it looks very good, the port sizes on the head are also larger than on the miltek manifold. It looks very similar to the GTT manifold!

Mar 2nd, 2006, 02:36 AM	#12 (permalink)
obehave Mini Mod Join Date: Sep 2002 Local Time: 05:52 AM Posts: 9,254 Offline	Quote: Originally Posted by HObzy I have this system and when on the car the placement of the sensor hole is exactly where it is on the original cat. and in the same place on the decat pipe. Thanks. It looks like a nice piece.

Mar 2nd, 2006, 11:56 AM	#14 (permalink)
obehave Mini Mod Join Date: Sep 2002 Local Time: 05:52 AM Posts: 9,254 Offline	Quote: Originally Posted by roland2003 Looks similar but differs in that the GTT product uses TIG welding throughout ( mostly mig on the janspeed one) and the GTT secondary pipe diameter is 6.5 mm larger in diameter than the Janspeed. New GTT 'fat cat' GTT Mk2 manifold coming very soon! Regards Roland GTT If I recall correctly secondary pipe diameter will affect the rpm where the header is most efficient thereby affecting the torque range. Would not the larger pipe be more applicable to higher rpm requirements like tracking whereas the smaller diameter would be more effective on the street? All of my experience with this is on NA V8s so I'm not sure of the influence these dimensions will have on our little SC'd motor. Thoughts from Lohen and GTT, and anyone else for that matter, would be appreciated.

Mar 2nd, 2006, 01:43 PM	#16 (permalink)
obehave Mini Mod Join Date: Sep 2002 Local Time: 05:52 AM Posts: 9,254 Offline	Quote: Originally Posted by roland2003 Hi Obe,The primary length in conjunction with exhaust valve timing effects the rpm at which the 'cylinder scavenging' occurs.The minimum 'calculated' primariy diameter for this car should be 1.5 " and secondary 2.75" (I know thats very big!). We currently use 2.5", the new version will be 2.75". The secondary should be the same dia.as the system as is part of it as far as the gas is concerned. The bigger diameter the secondary the better the scavenging ie a bigger negative pressure pulse travelling back up to the cylinder to not only suck out the last bit of exhaust gas but also suck more inlet in . Remember both inlet & exhaust valves are open at TDC 'valve overlap.' allowing us to take advantage of this sucking effect. Turbo cars benefit from a very large diameter first section of exhaust,even if it then reduces down in diameter further downstream. It allows the turbulant flow to break up into a laminate flow reducing backpressure. Basically gas corkscrewing down the pipe has to travel much further . I'll put more input into this on the new thread I'll start soon regarding our new Mk2 sports cat &manifold.And yes the system in an ideal world needs to be 2.75 (3" ) idealy too. Regards Roland GTT Thanks. Maybe once again an NA thing but larger primaries also reduce gas velocity faster than smaller diameter tubes. This affects primary and secondary tube length. All this in turn impacts the effective optimal rpm at which the header is most efficient. Correct?