Lets continue this thread as we all strive to get the cooling efficieny up. I have asked one of the cup guys i met at hockenheim to send me pics of their installation with the brake hoses bringing air from both side intakes.
If we could jointly develop an air water air installation like the bemani, i think that would be the ultimate. A direct replacement for our intercooler coneecting into the existing plumbing and using the existing brackets etc (even with a connection for the current air temp sensor) so that as far as the engine is concerned nothing has changed except now the intercooler is actually cooling the air!..and then additional piework to the front of the car to a front mounted radiator.
Charge cooler
The problem is you need a lot of pipe work an extra pump for the water - not an easy thing to just bolt on. Bemani kit is a work of art they have even put the pipe work through the sills!
Intercooler
I think it would be easier to improve the current intercooler. How about water - you could use a water jet to put a mist of water on the intercooler to help cooling.
Other problem is the air getting to the intercooler has already been hard working, part of it will have already been through the radiator.
The problem with the larger roof scoop is the efficiency gained is cancelled out by thee extra drag it creates (I spoke to MS about this)
A combination of more efficient intercooler, heat shielding and extra cooling would be a good compromise
Hi Jamie, who’s MS? They sound like they know their beans. There is a trade of between extra drag and intercooler effectiveness, I cant do the analysis to that level of detail (I’m not a CFD engineer) but I would have thought that Lotus would have tested it on the GT3 car and come to the conclusion that it was worthwhile.
The low temperature coolant radiator has to go at the front of the car first in the airflow so you’ll see a drop in radiator performance…
Anyway Jamie, whats the diameter of your supercharger pulley?
If you want to spray something somewhere how about methanol upstream of the compressor? That’ll give you a lot of chargecooling!
It will be really interesting to see how its all mounted.
I was curious about the Toyota Corolla Compressor than they are doing just now so I logged into the Toyota tech website, registered (paid �20 for a day) and downloaded everything I could get my hands on. 2ZZ engine manual, Celica gearbox manual and the Compressor appendix to the Corolla. (If anyone wants any engine info you know where to find me) amyway, the Toyota is totaly different. It still uses the Eaton blower but it has a magnetic clutch like an air con pump rather than the bypass valve. Its also a short nose version so the package is very different.
I know Porsche Turbo owners swear by SECAN coolers but they’re in the region of �9000 for the road one and �14000 for the race one (and yes I do have the right number of zeros).
I think HS Marston would eb the best bet. We’ve never had a problem with them, in terms of performance I doubt you’ll do better in the UK, but we would need to get our act together, they dont like vague requests and one off items.
Serck Motorsport may be good too but I’m not sure if they’ll do bar and plate… I thought we’d got one from them but theres no evidence of such on their website…
I asked the guys who race to send me some pics of the additional ducting they had fitted. It turns out they have removed it coz the engine bay itself was getting too hot! The induction temps went down, which confirms that our cooler is not getting enough air, but they had problems with the alternator and other parts getting too hot.
Whilst i could imagine that a more efficient intercooler would help make more of the limited air, i feel that increasing the flow to the one we have would be a better way fwd.
The ultimate would be, talk to Bemani, see if they would do an S uprgrade. They could use the exact same water system as on Jamies car, but instead of mounting the chargecooler down under the boot , theys could mount it in the same position as our intercooler, using the same intake pipework that we already have etc.
The advantage of that would be we would have the cooling efficiency of the bemani system along with the Lotus factory short intake set up and Map
I was reluctant to change the look of the car, but the more i think about it, i have to agree, bigger roof scoop.
Its the least expensive and least complicated. It also has the minimum effect on the rest of the vehicle ie weight or space. I think the cooler we have would be fine if we get enough air too it. Coupled with a heat shield to reduce heat soak when stationary.
If you can squeeze a blower in without dumping the stock manifold then I’d imagine that would be better than swapping to the short stubby s/c type. I doubt the stubby manifold tunes at all which means the blower has more work to do => less power.
Sorry a bit late. I have a exiges S.
Is it possible to map my S with the map of 240 and put a smaller pulley ?
Do both cars have 4 injectors?
With new intake how many HP shuld I gain?
Who could do it, any idea?
Your problem is the ECU, the only peeps so far to crack it is Bemani. Easy to get more hp but get the right fueling is the trick.
Both the Cup and the S use 4 injectors
You could ask a Lotus dealer if they could re-program your ECU with a late 2005 240 Cup calibration but you would need to fit the 240 Cup injectors as they are special parts (larger).
I’m wondering if the std Exige S injectors are big enough. If you look here you’ll see the AFR run a bit lean at the top end…
Sorry a bit late. I have a exiges S.
Is it possible to map my S with the map of 240 and put a smaller pulley ?
Do both cars have 4 injectors?
With new intake how many HP shuld I gain?
Who could do it, any idea?
Thanks
In theory you could get any dealer that sells cup cars to re map the ecu with the 2006 cup map (2006 cup cars are also only four injectors) Fit the smaller pulleys and off you go …240 hp…red motorsport then do manifold sport cat and stage 2 and get 265 hp
You do not need anyone to hack the ecu coz a Lotus dealer can put any lotus map on the ecu. I understand however that only cup dealers have the cup maps. But there is no shortage of them!
