I was asked to post this by a Lotus Forum member.
I have no affiliation.
Ed
http://www.thelotusforums.com/forums/topic/61738-alunox-321-ss-manifold-for-esprit-turbo-group-buy/
Alunox 321 SS Manifold for Esprit Turbo Group Buy
Started by MarkKassim, Dec 03 2013 12:54 PM
#1 Alunox 321 SS Manifold for Esprit Turbo Group Buy: post #1
Mark Kassim
LO
Posted 03 December 2013 - 12:54 PM
Another chance to buy the 321 Stainless Steel manifold upgrade from Alunox. This is our 3rd group buy and just to recap on the history of the product. It was developed by Alunox who are a well established engineering company that supply the motorsport industry with tailor made high end exhaust systems, made of exotic materials such as Inconel, titanium and 321 Stainless Steel etc. Alunox took on the job of redesigning the original cast manifold for the Esprit due to its failure rate. But also were able to offer uprated performance using their expertise in this area.
The manifold is constructed from 321 Stainless Steel, precision TIG welded in dedicated jigs giving a fracture proof construction. The flanges are laser cut out of Stainless Steel to give an accurate fit, the collector uses burns double slip joints to allow movement during the heat cycle whilst being supported by the pivoting brace mounted directly under the turbo.
Intro.jpg
The downpipes are all equal length mandrel bent tubes to maximise flow arranged to fit within the space available. Even at normal driving speeds the exhaust gas temperatures are typically 750 to 850 °C and greater during track use. The manifold has been proven to withstand all the temperatures and conditions produced by the Esprit. The manifold is also lighter than the original cast unit weighing only 6 Kg. All these attributes produce a durable high quality product with gains in both power and torque and lag reduction.
It has been dyno tested as seen in the video below on a highly modified Esprit running at 424 BHP and 409 lf.ft torque.
Further in-depth technical info on this can be found on Dave Changes thread
Exhaust manifold design test result.. - Induction/Turbo/Chargecooler/Manifold/Exhaust - The Lotus Forums
It has also been track tested and driven hard without fail. Look for feedback on the forum about performance gains.
The kit also includes all gaskets, stainless steel nuts and studs and brace. The turbo flange can be changed to accommodate different turbos, as can the collector be made to order. These adjustments are at extra cost and can be discussed with Leon at Alunox.
The manifold comes with 2 year warrantee, this does not cover fitting and shipping.
The normal one off price is £1150 + VAT.
The group buy price £1000 + VAT + Shipping, for 10 off
I will put up shipping costs later
In addition to this there is also a stainless steel K nut option for the manifold head studs. This is an alternative to the Lotus locking tab washers. This option is about £35. I will post later if anybody's interested.
If you want to take advantage of this offer sign up below and I’ll add you to the list.
Thanks,
Mark
I have no affiliation.
Ed
http://www.thelotusforums.com/forums/topic/61738-alunox-321-ss-manifold-for-esprit-turbo-group-buy/
Alunox 321 SS Manifold for Esprit Turbo Group Buy
Started by MarkKassim, Dec 03 2013 12:54 PM
#1 Alunox 321 SS Manifold for Esprit Turbo Group Buy: post #1
Mark Kassim
LO
Posted 03 December 2013 - 12:54 PM
Another chance to buy the 321 Stainless Steel manifold upgrade from Alunox. This is our 3rd group buy and just to recap on the history of the product. It was developed by Alunox who are a well established engineering company that supply the motorsport industry with tailor made high end exhaust systems, made of exotic materials such as Inconel, titanium and 321 Stainless Steel etc. Alunox took on the job of redesigning the original cast manifold for the Esprit due to its failure rate. But also were able to offer uprated performance using their expertise in this area.
The manifold is constructed from 321 Stainless Steel, precision TIG welded in dedicated jigs giving a fracture proof construction. The flanges are laser cut out of Stainless Steel to give an accurate fit, the collector uses burns double slip joints to allow movement during the heat cycle whilst being supported by the pivoting brace mounted directly under the turbo.
Intro.jpg
The downpipes are all equal length mandrel bent tubes to maximise flow arranged to fit within the space available. Even at normal driving speeds the exhaust gas temperatures are typically 750 to 850 °C and greater during track use. The manifold has been proven to withstand all the temperatures and conditions produced by the Esprit. The manifold is also lighter than the original cast unit weighing only 6 Kg. All these attributes produce a durable high quality product with gains in both power and torque and lag reduction.
It has been dyno tested as seen in the video below on a highly modified Esprit running at 424 BHP and 409 lf.ft torque.
Further in-depth technical info on this can be found on Dave Changes thread
Exhaust manifold design test result.. - Induction/Turbo/Chargecooler/Manifold/Exhaust - The Lotus Forums
It has also been track tested and driven hard without fail. Look for feedback on the forum about performance gains.
The kit also includes all gaskets, stainless steel nuts and studs and brace. The turbo flange can be changed to accommodate different turbos, as can the collector be made to order. These adjustments are at extra cost and can be discussed with Leon at Alunox.
The manifold comes with 2 year warrantee, this does not cover fitting and shipping.
The normal one off price is £1150 + VAT.
The group buy price £1000 + VAT + Shipping, for 10 off
I will put up shipping costs later
In addition to this there is also a stainless steel K nut option for the manifold head studs. This is an alternative to the Lotus locking tab washers. This option is about £35. I will post later if anybody's interested.
If you want to take advantage of this offer sign up below and I’ll add you to the list.
Thanks,
Mark