Yeah, who’s up for an exhaust test. haha
Done plenty of exhaust testing over the years, luckily I got the charge cooler option right first time. Well apart from when i forgot to plug the pump in LOL…
The lawyers are rubbing their hands
Got the 2-eleven shroud, boy it is light.
Just need to get the duct 
Just comparing the shroud by holding it up the the standard shroud. The 2-eleven is slightly smaller it looks like.
Any guides to how people fitted.
Cheers
Ahh I see!
Cheers tarmac terrorist.
Almost got all the bits for the modification.
2x 100mm high temp duct
1x2-eleven shroud
2x 100mm to 45mm rectangular duct (still waiting on one from another store)
2x45mm extensions
4x worm drive hose clamps
Now to fit the 100mm (4inch pipe in the side standard scoops the change to a rectangular duct should make it easy to fit when it gets thinner and 4inches is to big when the space narrows.
Just squeeze it through the tight spaces, the cross sectional area won’t be affected.
Softy, where did you get all the bits to do this modification. I am looking to follow suit, not sure yet whether to use the 211 shroud, or just basterdise the standard one.
First thing is you can’t fit 100mm on the standard shroud, only up to 63mm or 2.5inches. This is what most of the aftermarket companies are fitting.
Second, it is suspected that air coming off the radiator is preheated that is entering the scoop.
Third, the volume of air is considerable more with the two 100mm / 4inch pipes.
So if you are going to mod the car get the most air to the intercooler. Even with this method it still wil not keep the intercooler super cool like a chargecooler. So if you are going the increase airflow option get as much as you can!
Also the 2-eleven shroud is a genuine part so it is still semi original. Well that is the tune I am playing.
Where did I get the stuff;
2-eleven shroud, Lotus dealer
Piping from a local coupling store, lots of 100mm piping out there for engine bay use.
Duct couplers to rectangular shape to fit standard side scoops, aquired from an appliance (clothes dryer) spare parts store,
Worm drive rings, coupler store.
Thanks buddy for advice.
Mod finished… yippee!
Okay it did take about four to five hours. The old shroud had some cracks and heat damage on the underside, so good it is now in the bin! The 2-eleven is just so much sturdier.
Removed intercooler and only removed the drivers side intake piping. Made a heatsheild from thin aluminium (used cupboard to make a template)and popped a little silastic under to stop any vibration rattling. This went under the rubber mounts tricky to install as one nut is difficult to get too.
Removed old shroud, cut off with a hacksaw and carefully went around cutting through the silastic to get all the edging off.
Connected 4inch to rectangular coupler to pipe and feed it down to side scoops. I had already shaped the square section to align with the side acoop mesh shape. Once pipe was feed in, put square piece in and glued with rectic pipe glue. Then repeated other side, which was a bit more difficult due to the water tank bracket and pipe still being installed. But got it in there.
Drilled and screwed the section into the bracket I had fitted previously, put a couple of dobs of silastic behind the scoop section to stop any rattles.
Modded side scoops so they are about 5mm further out to allow non restriced air into the side scoops.
Bolted everything back together.
All done.
More photos of mod
Yesterday I modified a standard intercooler shroud to allow for 4" ducts.
Took a fair bit of measuring and a careful hand with the Dremel.
Turned out pretty ok.
Starting with two of these - http://www.fresh.se/sv/plast/oevergang-rektangulaercirkulaer.php?group=prod_prod_grp-s1%2F241
Measure, cut, measure, cut, fettle, fettle, fettle.
A bit of Silkaflex, primer, paint later and - voila !!
Rainy day at the local track today so no point trying to log any temperatures. Will do so next time.
Looks cool, looking forward to the results
How did you attach it?
Just a very rough evaluation from mine. Use to always be warm to touch after a drive, now it is stone cold. You can feel the heat off the engine, but the intercooler is absolutely cold, as in can feel no tempreture rise in it at all.
Summer will be the real test. We will see
Just a extra note:
One of the exige owners here did a mod, fiiting a 2.5inch pipe on the drivers side into the snorkel before the rubber boot. He then did testing which included doing the same acceleration runs, which included;
Both roof scoop and driver side pipe
Only roof scoop
Only pipe
Both blocked off completely
The results were so unusual that he thought he had mucked up the test so repeated and got the same result.
The roof scoop “only” got the highest tempreture.
Both blocked off was cooler.
This raised some discussion as you can imagine, we could only put it down to the heated air coming off the radiators, but this is only an assumption.
Interesting results.
Anyone else found something similar?
Both blocked was cooler than roof only, but both blocked still warmer than only pipe and both roof and pipe?
On Lotus Talk there was one guy claiming that the standard setup with only roof actually sucks air from the engine bay (flow reversed from what you would assume). However, I don´t remember how he came to this conclusion so it might be not true.
@Wennbom: Did you also fit baffles inside to direct the air? Looks good and I´m looking forward to the track results.
I posted my results from Zolder with 2x4 inch ducts on SELOC, and the IAT never went higher than 20-25 degrees over ambient (was 32 degrees on that day).
I can imagine the hot air rising in a slow or stationary position, this is one of the main reasons I changed it. If sitting in traffic in the australian hot sun, at least due to the hot air rising it will naturally draw air in from the lower side scoops due to convection.
It is also possible that the hot air is coming off the front radiators and entering the scoop. It is strange lotus didn’t move the scoop when going to the sc car as at the top of the car is the lowest pressure point due to the wing effect of the body. Air needs to move from a high pressure to a low pressure. So it is the difference in air pressure between the front of the scoop and the space immediately behind the IC. How much this is I don’t know.
It is all very interesting, all I know is the 2-eleven mod has made my IC run much cooler in normal driving conditions.
Holy crab cakes , Is this thread still alive !? The extra side pod cooling with the long roof scoop + Marston intercooler made a big difference on my car , never pulls back with heat soak on the road now .
I’d like to do a similar mod… but I’d like to get the air intake for the engine from the Mohawk roof scoop and all of the intercooler air from the side scoops.