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I want to say I saw an intake from some other company that makes intakes for some other exotic cars but I have never seen anyone actually running the intake.  Forgot what it was called.  BOE will be your cheapest bet by far and will be sufficient as long as you don't plan to increase the HP over stock too much.  

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Lotus run the car rich for a reason. It doesn't run too rich. It is to add cooling at the flame front. Whether its the best way to cool is a moot point, but that is what it does. Overheating of the he

A stock V6S runs at WOT at redline an AFR of 10:1 on stock tune. A V6S with CAI, Larini headers, NO CATS, OEM backbox runs at WOT an AFR of 10.5:1 on stock tune.   Still seems pretty ri

Spent another day testing the intake at the track during the Lotus cup usa HPDE, zero issues with the intake, no CEL, no idle issues and the car felt fast again compared to the stock intake. I w

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On 6/16/2015, 9:33:31, Bravo73 said:

Anyone installed a KomoTec CAI on an NA Evora ?  
How loud is the induction noise ?

Anyone installed a KomoTec CAI on an NA Evora with 2bular Headers, Downpipe, and Metallic Cat ?
Does the combination maximize the HP gains, with the Stock ECU Tune ?  
Does the ECU adjust the Air/Fuel mixture correctly with that combination ?
 

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  • Gold FFM

Bobsy, there is a topic on here re Tuning the NA Evora where a lot of this is covered.

My understanding is manifolds/headers + exhaust + CAI = ECU remap needed.  Together, when all done you will see around 40bhp gains.

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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I have had the 2bular Header - Downpipe - Metallic Cat installed on my 2011 NA Evora, with the stock air cleaner setup, and no tune for 2 + years. I have never gotten a CEL, or had any issues. 
I understand that adding a CAI on an NA Evora with a Headers System will give substantial HP gains over just the Header System.

I have posted the A/F ratio question, and need for a tune on LT, and BOE indicated that there is no problem with their CAI and Headers requiring an ECU Tune.
See Posts #705 and #707 http://www.lotustalk.com/forums/f170/boe-evora-cai-123964/index36.html

I was curious if anyone had installed a Komotec CAI on an NA Evora, with a header system to see what the Komotec induction noise is like, and whether there are any A/F mixture issues like the Radium encountered ?

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Komotec does recommend a custom tune in conjunction with their airbox.

BOE uses a slightly smaller diameter tube than stock, leading to higher airspeed at tha MAF. This corrects the MAF reading for the freer airflow. The Komotec tube is largen and has the same dimensions as the throttle, the custom tune compensates for the freer flow. 

However, the self learning capability of the ECU can live with both. It makes sense to restrain oneself during the first 1000 Km whilst the learning process is ongoing.

If you have the choice between a Stairway to Heaven and a Highway to Hell don't forget the Nomex®!

Captain,  Lotus Airways. We fly lower! 

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FYI, and even if not directly Evora related, I can add that I asked Komotec if I could fit their CAI to my otherwise stock Exige S (maybe before a full EX430 later), and Daniel Koblitschek adviced me not to do so, as the AFR may be too lean ... I asked him why it was written on his website that it can be fitted on an stock car, and he said that it was borderline for the Evora, but as the Exige is lighter and supposed to be pushed harder, it needs a ECU remap...

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Hi All

Another datapoint for you all.

I also have had the 2bular Headers, down-pipe, Metallic Cat AND the back box installed on my 2010 NA Evora, I also have the BOE CAI.

I did have the Radium before the exhaust work was done but switched over as the BOE has less hiss. But I have never had a CEL or had any other issues with either. 

I recently got a ECU tune done with Essex Autosport (Essex UK), to make sure all was safe. The main comment from the tuning guy was that it did need a tune and was running borderline lean in some places.

It is now safe across the board. The tuning guy was not convinced that the CAI added much as he had seen similar results with another Evora - same exhaust system but OEM air intake.

I do not have both plots but the tune added about 4-5hp. I now have 298.2!

FYI In the past the tuner also tried to tune a Radium fitted car (not mine) but gave up and it was returned to standard before the mapping was completed.

All the best

Spunagain

Evora_Dyno_2_oct_2015.jpg

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Phil, thanks for chipping in with your experience.

298bhp at the fly sounds really impressive and very exciting, I'm not an expert in any way but does that equate to around 340 bhp as I may have read that you get about 15% loss in full bhp through transmission loss 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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Hi Andy

The Dyno Dynamics set up is a rolling road which measures the power at the wheels. It takes account of temperature, pressure and Lord knows what else and calculates the power at the fly from that. So not quite as impressive, but pretty believable.

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  • Gold FFM

Cool, I'd be excited at nigh on 300bhp at the fly as the actual bhp figure would be higher from the engine, or that is what I believe.  So you have one hell of an NA there.

I have a 2010 too, and am toying with letting the techs at EA have a go, sounds really promising.

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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Hi Andy

To be honest for bang for buck I would add a CAI first. That gave me the biggest incremental feel in performance gain from the bum dyno.

On an unrelated note (honest) I have a Radium going spare which I keep meaning to put on ebay ;).

 

 

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  • Gold FFM

yup, probably got them the wrong way around - I always do say the only useful tools in my hands are the one's made out of chocolate!  

Doing some simple maths:

Std NA         276bhp    258lb torque  =   199.6 bhp per tonne and 186.8 lb per tonne

Phil's NA      298bhp    276lb             =    215.5 and 199.6

Std S           345bhp    295lb              =   239.3 and 204.6

The increase in torque is impressive, and when you compare weight (NA is around 130 lb lighter (but then your 2bular will save another 30lb for full system - so torque per tonne = roughly 201.6 and 218bhp per tonne)) and must give you great drive-ability Phil.

choc tools.jpg

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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It is noticeably better than stock, but it would really benefit from the close ratio gearbox.

I have driven mine and a CR NA back to back and having done that, if my clutch goes then the next mod is the CR gearbox. It really makes the car feel perkier in (my) real world driving.

For all I have spent on the car I could have traded up to an S but the journey has been interesting!  I am deliberately not adding the costs up!

 

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  • Gold FFM

I was fortunate in that mine came with the CR box and I know no different, it is lovely!  Yup, I'm spending cash on my car and going down a similar route to you engine mod wise, but I also am not adding it up. It's just such a great place to be....

If you can, get the CR 1-4 gears and keep 5 and 6 back for lazy and quieter m'way cruising. On normal roads tamking it, you really use more than 2,3 and 4 anyway and 4 is well over a 100 mph when you're pushing on track.

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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Phil,
Thanks for your input.
Since I don't have easy access to getting an ECU tune, like you did at Essex, I am reluctant to pull the trigger on a BOE or Komotec CAI.
I posed the questions regarding the Komotec CAI to see if it was different in terms of A/F mixture issues, but am glad to get your experience with the BOE CAI.
I recall that you were concerned with how loud the 2bular System would be, and I think that you stayed with the Standard Non-Sport Muffler ?
Do you find the BOE CAI induction noise objectionable ?
If I can resolve the A/F Ratio issue with certainty, and the induction noise is tolerable, I would love to go to a CAI. If the Komotec, with larger diameter gives more HP increase, I'd go for that.

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2 hours ago, C8RKH said:

Cool, I'd be excited at nigh on 300bhp at the fly as the actual bhp figure would be higher from the engine, or that is what I believe.  So you have one hell of an NA there.

The 'fly' refers to the flywheel ie the last bit bolted to the engine. That is (effectively) the power that the engine produces. 

Friction in the transmission (ie gearbox, diff & driveshafts) will leave you with the lower figure for 'power at the wheels'. 

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Hi Don

I would not be comfortable with the CAI and Headers without a tune, but to be honest l ran for about 6 months or 5000 miles without the tune without issues, but who knows what the longer term effects could be.

Originally I did stay with the original muffler which was my plan but opted to change to the 2bular back box when one became available to me at very little cost.

The BOE is not much louder than stock when cruising, which was my main worry, and with the 2bular box I think the whole setup is quieter than your 2bular and Lotus sport box when cruising at freeway speeds (from memory) and less "droney" which I think is the USP of 2bular's creations.

But when you open the taps all hell breaks loose! What is really striking is the difference between windows closed and windows open. The Evora soundproofing is incredibly good. Under load you get a great combination of exhaust and induction notes which create a truly exotic soundscape and is addictive. I must try and a make a recording and measure the SPL some time, l need to do it to check if I will have any track day limit issues. I suspect that static tests will be fine, but drive by tests could be tricky.

Summary is that it is civilised when you want it to be but loud when the hooligan comes out. The "loud pedal" is really a good name for the throttle pedal.

 

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Just picked up a BOE cai off a member who has sold his evora and did not fit it so still new  in the box also I have just fitted jims version 3, 2ubular back box which now sounds "super car"and will fit the cai Sunday if it's here.

whats the average cost for a re tune and I'm guessing it won't be needed until the decision is made on headers etc, wonder what the power difference will be between a tune with and without headers, I know std set there would be restrictive gasses which would not help power but if I can get close enough power without headers I may opt to stay with the oem twin decat pipes, I know there is the heat reduction with cats delete.

also what's the garage time install verses me doing it "average diy with tools"

 

""yes andy I know""

 

 

Edited by Jmanji
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  • Gold FFM

As far as I can work out one of the biggest reasons for the ECU tune with cai, headers etc is to stop the engine going crash bang and whallop through being run too lean/rich - can't remember which as stuck in a hotel room after far too many whiskeys!. Sometimes longevity and reliability is as good as extra horses!!!

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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16 hours ago, Jmanji said:

H Jmanji

 

Cost for ECU tune is about £1000 first time (for ECU crack as well as rolling road tune) and~£400 for retunes - but get quoted from Wayne at Essex Automotive for the latest numbers.

I am not sure what the gain is without headers though.

Also what's the garage time install verses me doing it "average diy with tools" for the back box it is only an hour or so for the back box and for the CAI.

The header are a pig of a job, it took a lot longer than I was quoted to do the job, so I am not sure what real cost will be but it is at least 2-3 days work if garage has not done it before.#Regards

Phil

 

 

 

 

 

 

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18 hours ago, Jmanji said:

 

...

also what's the garage time install verses me doing it "average diy with tools.


 

 

On my Exige V6 the instaal of my 2Bular headers and sports cat took me about 10 hours on a 2 post lift.

Here you have a nice "How To" install thread...

http://www.lotustalk.com/forums/f417/complete-larini-header-exhaust-diy-322593/

 

Edited by rasasoufe
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I have a system here including headers and have not had time to fit yet. I did ask a mechanic at a Lotus dealership and he said it was not too bad on an Evora and probably around 3 hours labour for them to do.

It will be Christmas before I get time, but hope to attempt myself then. I only have modest car ramps and jacks so I suspect it will take me far more than 3 hours. I'm sure it will have high points and low points before completion!

I did the CAI in Summer and it was quite simple. Might have been a couple of hours in total, but that was with me fiddling and being a bit of a perfectionist with this car.

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9 minutes ago, Danelaw said:
9 minutes ago, Danelaw said:

I have a system here including headers and have not had time to fit yet. I did ask a mechanic at a Lotus dealership and he said it was not too bad on an Evora and probably around 3 hours labour for them to do.

 

 

If it's 3 hoursThat's good, but for the headers I was reading up and somewhere it was saying 10hour install.

it must be very difficult getting the headers off each side and then again refitting the new ones, perhaps some specialist tools required, not to mention if a bolt snaps off.

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  • Gold FFM

I think it is 3 hours if they have done it before and know what they are doing, so I would budget for 5 hours labour. You need to get the car up in the air, take off the undertrays and other bits to get at the headers - it's just fiddly and time consuming - it's not that you need special tools though from what I have heard small hands and 360 degree rotating wrists would be a boon.

The issue is just where they are, as mid-engine layout etc.....

I'd not even contemplate doing it myself - lucky here in Scotland as MMC, and now Moncrieff cars have done several header changes on Evora's so should know the tricks etc. I believe EA and Lotus Silverstone, and most probably B&C should all have done several too. Might be worth doing some research and choosing a dealer who has a track record with the header changes.

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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