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More power and best ways to get it from an Evora NA?


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Trevor,

If you already have the Lotus Sports Exhaust, adding 2Bular's manifolds and downpipe would cost £1,530 plus fitting. I can't believe it would cost £1,500 to fit and another £1,000 to remap.

Edited by JAWS
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The forum belongs to me, I make up the rules. Back on topic or it gets locked, the people who have contributed to it are getting no value from any of these recent posts. End of story.

Gents, with the greatest of respect I did not re-open this thread to enable any form of a war of words or anything simikar between suppliers. I re-opened it because I, and I suspect many others too, a

Chav.

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I factured in the complete 2bular package at £2228-40 including VAT (2bular prices don't include VAT on the web). I would rather stick to the Lotus sports exhaust I have fitted currently but once I fitted the headers I would have no cats in the system at all and this would present problems at the MOT. If it was possible to fiut the headers, downpipe and their 200 cell cat then I could save approx £200-00 bringing it down to £2000-00. Itting I estimated at £700-00 making it £2700-00.

Having spoken to Essex Autosport who were the only company in the UK that I know of being able to "jailbreak" the ecu they tell me this costs £595-00 and then there is a rolling road session to remap the car at a cost of £300-00 all plus VAT = £1074

A grand total ££3774-00 if it's possible to use the 2bular 200cell with the Lotus sports exhaust or approx £4000-00 if not.

 

All suggestions welcome :-)

 

Trevor.

 

P.S. You coming to the dyno day? PLEEEEASE.

I'll get around to it at some point.

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I should think you could get hold of a standard Cat pretty cheap from someone as people are taking them off. Did you confirm you had the decat pipe then?

 

I've pencilled the rolling road day in so may pop along, just need to sign up.

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I did have a look the other day and it didn't look like a cat but then it didn't look like a straight pipe either so non conclusive until I have seen another to compare.

Trevor.

I'll get around to it at some point.

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  • 2 years later...
  • Gold FFM

Interested in resurrecting this thread to see if anybody did indeed go ahead with any of the mods above and what the results where.  With many Evora NA models now well out of warranty I was hoping to learn from others experience re sensible mods to increase power without affecting longevity.

 

I have a the Lotus sports exhaust and a decat. Like the post above, looking at 2bular headers and they now have 200 cell cat to replace the decat pipe that all links to the Lotus sports exhaust. So I am guessing this mod on my car would considerable improve things. But then what about the ECU remap to really release things?  Also, what about noise - I don;t want to get an ASBo from the neighbours so what would the 2bular headers, 200 cat and Lotus Sports box sound like?

 

I guess my car setup is very similar to lots of other NA's - sports pack, lotus sports exhaust and de-cat and as such I expect quite a few owners, now that the cars are out of warranty, or recently bought like me, would be willing to go ahead with "sensible" mods.  Any updates from the original posters etc....

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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Why would you buy headers which are more or less a (pre)cat replacement when you can get proper tuned / stepped manifolds from Larini at the same sort of money?

 

/serious question

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  • Gold FFM

No idea, which is why I re-ignited the thread to see if I could get some quality insights based upon what people have actually now done and experienced rather than just talked about what might/may/was possible.

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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By stepped you mean changing diameter through the system?  2bulars NA ones do do this. they get bigger at each joint.

 

AFAIK Jim is specific that his headers are infact tuned for the Evora with more testing than Larini. Everybody says their's is the best I am sure, but Jim has supplied more for Evora's than any other vendor I believe? So in theory he should have the most experience at getting a 'good' exhaust set up for the Evora.

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Would be great to have a direct comparison between 2bular and Larini headers.  I have Jim's rear box and decat which I have been pleased with. Does anyone have an update on the Swindon airbox, as I may change my Radium to that if it looks beneficial.

Edited by Whitey
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I'd be interested in a U.K. Supplied intake.

I'm also happy to take numbers to ITG if there was interest in a U.K. Supplied version of the BOE intake. (Filter is made by ITG then shipped to USA, added to by BOE then we pay to have it shipped back to the U.K.)

Currently Owned: 2018 Lotus Elise Sport 220 in Metallic Blue, Alcantara Pack, Forged Wheels, 2piece brakes, AirCon, Hard/Soft Tops, Red Calipers, Stereo, Interior Colour Pack, NVH Pack, Carpets, Mats.
Previously Owned: 2016 Lotus Evora 400 'Hethel Edition' in Essex Blue, Red Leather, Red Calipers, Silver Forged Wheels
Previously Owned: 2010 Lotus Evora NA in Solar Yellow, Sports Pack, Tech Pack, "Heritage Edition" Recaro Seats
Follow my Lotus journey here: http://www.FaceBook.com/HandmadeInHethel

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  • Gold FFM

What's the Swindon Airbox and can anyone point us to any links re info etc.?

 

Also, is there still an issue with headers and airobx/CAI whereby you need to then remap the ECU due to the engine then running very lean?

 

Again, just really interested to understand what people have ACTUALLY done to their NA Evora, what results, what issues, etc....

Thanks

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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  • Gold FFM

So being total "anal" why is it being mentioned in an NA specific topic?  Come on wake up please!!! Let's keep on topic re NA tuning. Start / resurrect your own for "S" models.  :)

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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So being total "anal" why is it being mentioned in an NA specific topic?  Come on wake up please!!! Let's keep on topic re NA tuning. Start / resurrect your own for "S" models.   :)

 

The airbox was mentioned by Pierre (series one), I have discussed it with him on another thread on sel0c.  I mentioned it on here as it may become relevent? I have asked the question to Swindon about n/a fitment as the angles of the throttle body are different. At the moment they have not come back to me.

 

If you so wish I will keep it between Pierre and myself.

 

Regards

Gav

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  • Gold FFM

Sorry, just re-read my earlier post and it sounds quite arsey which wasn't my intention at all. Any info on the Swindon Airbox would be gratefully received Gav especially if it was a fit for the NA.

 

The S seems to be well supported by the likes of Komotec with an abundance of options up to around 430 bhp I believe. What I am really looking for is an affordable and reliable route to get the NA up to around 310bhp as I believe that would just totally transform what is already an exceptional car.

 

Took mine out yesterday for a pootle in the rain and thought it was a bit slow on the pick up in 4th from about 50mph - but then I looked down at the speedo and it reminded me just how fast the car moves without any drama - I was going much faster than I thought! Now an increase to say 310bhp would really make this car a little giant killer in real life motoring.

 

What really made me smile though was leaving the car in 2nd gear and letting it just roll down from 30 mph as I went into a small town (Crieff to be exact) just listening to the popping/gurgling of the Lotus sport exhaust - it really was quite intoxicating, put a huge smile on my face and I was only going as fast as a bicycle!   :)

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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AFAIK Jim is specific that his headers are infact tuned for the Evora with more testing than Larini. Everybody says their's is the best I am sure, but Jim has supplied more for Evora's than any other vendor I believe? So in theory he should have the most experience at getting a 'good' exhaust set up for the Evora.

 

Based on?

 

Both Larini and Jim want to sell you a manifold.

Do you really think Larini would tell Jim how much research has gone in their manifold or vice versa? Of how much of these are being sold?

 

The Larini manifold was developed on my car and has been developed using mathematics and physics.

I appreciate what anyone is saying, but as far as I can see it, there's (not so simple) formulas which, based on engine data, will tell you ideal primary, secondary etc. volumes. That data needs to be taken along into a mechanical design which of course is limited by the amount of space one's got.

Looking at differences, I'd say the Larini manifolds have much longer primaries, so more volume in their primaries.

 

I'm not saying either one is wrong, but taking sales blurb from either one as gospel doesn't seem right.

 

To be honest, I don't even think the data which is presented for these manifolds is correct as the after install torque graph shown doesn't change.

One looks exactly the same as the other but slightly shifted upwards. That's odd to say the least as you should not only see a torque increase, but also a change in the way the engine delivers torque after installing a tuned manifold.

 

All discussions I've seen where people compared any Evora or Exige V6 manifold with any other was surrounded by a lot of marketing and were mainly comparisons of apples and grapefruits so to say.

For instance, if you say manifold x delivers more power than manifold y you should at least also take torque into account, but also.... if it turns out the mapping on the car has been tweaked to make a specific manifold work better you've got to ask yourself if the comparison you're doing is correct.

 

There's a cunning plan to do some ECU work on my car this season and come up with an optimised map for the Larini manifold and get some decent pre- and after mapping data which will tell us much more. :)

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  • Gold FFM

Would be good to get the info on your ECU "tuning" Yvotuck when it is available. As you say, marketing info is just that and comments re "feel" and "noise" are very subjective. Hard data is what we want to see.

 

Anyone had the Essex retune with the 2bular headers and has some hard data they can share with us?

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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AFAIK means exactly that. 

 

I have Jims set instead of Larini due to the impression I got from forums and speaking with owners of Jims products. I never found a Larini owner until after I bought from Jim. Having now got the system and also spoken with Larini owners what would I do if starting over?  I would go to a specialist I will not name that has done pipes for Lotus before and will do something bespoke and fitted in situ. I don't know if Jims are better then Larini but the pipe diameter does change which implies thought and reasoning, so that is some sort of tuning and except for delivery time his reputation was/is good. I thoroughly agree ecu tuning is required to make the most of it.

 

But all of this totally misses the point -

 

 

I wanted to get rid of the nightmare engine bay heat from the cats. That's it.

 

 

The cats are frying everything in there over time and I enjoy the car too much to ignore that. So it doesn't really matter in this case what system goes in so long is it results in a cooler engine bay. 

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  • Gold FFM

So we can probably put to bed the arguments around one set of pipes versus another, I am sure they are both "tuned" and "both" of sufficiently high quality to satisfy owners. But what do they actually do to the performance of the car? What increase in power and torque and how it is delivered?

 

Your point series-one re the reduction of heat in the engine bay as a by-product of removing the three standard cats and going to one "sports cat" (I am assuming this is what you have done here) is a good one. Certainly after a good drive I am amazed at the heat coming out from the vents at the base of the roof so can believe the cooler operating environment assists greatly with longevity.

 

So we've had a few days and a few new posts now - I am not sure though we have any real concrete, credible insights on performance gains to be achieved, backed up by evidence from those who have actually achieved the gains. Is there really nothing out there to provide some sort of evidence to guide a nobby like me to the right upgrades?

 

I guess the upgrade path I am starting to settle on, through reading lots of forums etc, is as below. It seems to be the ONLY option:

 

1. New headers to replace my stock items. Replace my current de-cat pipe with a sportcat pipe to give a reduction from 3 x stock cats to 1  x 200 cell sport cat and connect to existing Lotus Sport exhaust box - likely cost around £2800 parts and fitted.

2. ECU tune - possibly Komotec/Kold fire and Essex Autotune seems to be the place mentioned the most for this (but far from Scottieland though :mellow:   ) - likely cost around £750

2. Replace stock flywheel with new, lighter version when clutch needs changing - Likely cost around £1,000

 

So for the princely sum of around £4500 I should be able to tune my Evora NA to get to somewhere around 310 bhp.  Bolting on the supercarger kit would be around a £6k cost fitted, and whilst this would net around 345 bhp the extra weight would negate some of the benefits. So, £4.5k for 310bhp in an NA Evora seems the "optimum" way to go.

 

Thoughts?

Cheers Andy.

Alcohol. Sex. Tobacco. Drugs. Chocolate.  Meh! NOTHING in this world is as addictive as an Evora +0. It's not for babies!    

The first guy to ride a bull for fun, was a true hero. The second man to follow him was truly nuts!   

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Andy, plan is to first do a proper / dedicated remap for the exhaust line.

As soon as that's available, I'll publish the results.

 

The other thing I'm still looking at is induction which I still think is tricky on the Evora or Evora S.

The project has been abandoned for quite some time as I didn't have the time to look at it, but while working on that, I found out the options offered might be a bit of a risk.

Reason for saying that is we've done some simulations of the pipe work involved and found the MAF sensor to be installed in a 'quiet zone' on some of these kits.

 

The advantage of doing such a thing is you will have less issues with MIL lamps because of instability in the air flow but the disadvantage is the ECU doesn't calculate the correct mass. I.e. the engine gets more or less oxygen than the ECU thinks it's getting which in my book is a bit of a risk.

That's also why some of the kits worked well on NA cars but not on SC cars. An increase in air volume means the quiet zones in the airflow will shrink (because of the volume and speed being increased) which means more turbulence inside the system and that will lead to MIL lamps.

 

While working on this I found it quite hard to guarantee a proper airflow using normal pipe work, but I've recently found a supplier who is able to deliver 3D printed plastics which are able to cope with high temperatures. This might be a solution as we can design a mesh inside the pipe leading to the MAF sensor to stabilise the airflow and make sure the measured volume is the real volume. :)

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You type faster than I do ;)

 

The cunning ECU plan is to do a map based on a standard car with standard induction but with Larini headers, sportscat and backbox.

That map would be a general map and will be the first in a range.

 

The idea is for you to buy a dongle with the map once, you would then be able to program the map (or get back to the standard mapping) as many times as you like (but only on your car with your serial numbers etc)

When the induction kit is ready, the same thing will be done as a combination, so headers / sportscat / backbox + induction with a dedicated map.

 

What I'll do is post real RR or dyno results. That means you know what you're paying for and what you can expect. Every engine is slightly different of course but it will give you an indication of what to expect.

Edited by YvoTuk
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  • 2 weeks later...

This is the reply from Swindon yesterday. Still no answer about n/a fitment but have asked again. So basically they have nearly doubled in price!  :2guns:

 

Gav

 

 

Hi Gavin,

 

I have an update on the Evora air boxes.

 

I was away last week but while I was away, I received information regarding the air boxes.

 

They can become available but currently there is a 3-4 week lead time, before they are delivered to us.

 

As i will need to order more stock, the total price of the air box as increased to £412 + VAT + P&P.

 

I will need a 50% deposit before we go ahead with order.

 

I am waiting confirmation from a few other customers before i can confirm the order from our side. So once this has been confirmed and you are happy to proceed I can forward you a pro-forma invoice so that payment can take place.

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So £495 +P&P? Let's call it a round £500 shall we?

As per my other thread I am in conversation with ITG for a solution similar to the BOE kit, which I believe should come in around £300

Currently Owned: 2018 Lotus Elise Sport 220 in Metallic Blue, Alcantara Pack, Forged Wheels, 2piece brakes, AirCon, Hard/Soft Tops, Red Calipers, Stereo, Interior Colour Pack, NVH Pack, Carpets, Mats.
Previously Owned: 2016 Lotus Evora 400 'Hethel Edition' in Essex Blue, Red Leather, Red Calipers, Silver Forged Wheels
Previously Owned: 2010 Lotus Evora NA in Solar Yellow, Sports Pack, Tech Pack, "Heritage Edition" Recaro Seats
Follow my Lotus journey here: http://www.FaceBook.com/HandmadeInHethel

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I wanted to get rid of the nightmare engine bay heat from the cats. That's it.

 

 

The cats are frying everything in there over time and I enjoy the car too much to ignore that. So it doesn't really matter in this case what system goes in so long is it results in a cooler engine bay. 

 

really......???.....wow....

you learn something new every day..........

 

I think I need as decat

The Faster You Drive...The Slower You Age

(Albert Einstein  14 March 1879 - 18 April 1955)

 

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