Exige S + Gotham tune + Proalloy charge cooler

[Ade]

Well the time finally came, it has been a while in the making but it is now here the "Gotham" tune is on my "S".
There is good news, The car was dynoed on the same dyno as first time which is connected direct to the hubs and it made.....

263.6whp @ 8000rpm and 171.4 lb-ft of torque @ 7930

The bhp was still climbing but to get a nice reading the operator finished before the limiter as he said he doesn't like the jagged bits at the end. I also have the AFR as well.
Now if you use a flywheel hp correction of say 12% this would give 295fwhp and 191.9 lb-ft of flywheel torque.
Although it has been a long wait it certainly has been worth it I need to thank (in no particular order) Wayne from Sinclaire, Wayne from Proalloy, Jim from 2bular, CharlieX and Frank.
You have all helped out in many ways :cool
I am now so happy to get my car back and just want to drive it all the time.
The full spec of the car is
Exige S
2bular sports cat and 24*8 GT3 Exhaust
Proalloy charge cooler
CharlieX Gotham tune
440cc RC injectors
Green panel filter

This shows the car as standard (with the 2bular and sports cat and green panel filter) as a pre then with the Gotham tune and Proalloy charge cooler overlaid

[qball]

My pants feel tight!

[NoFear99]

Ho my god ! Really interesting numbers.

Now make a nice video in action.

and post a picture with the charge cooler setup installed.


Congrats!

[apk919]

Wow. Very cool (water-cooled that is).

[Lotus-Position]

Quick newb questions: I'm not familiar with the intake setup on the S... does the charge cooler sit between the throttle body and the SC, or is it after the SC? Given that the heat is generated by the SC compression (i.e., PV=nRT) and the recyling, it makes sense to have it in the high pressure side, but doesn't all that volume introduce the same kind of throttle latency that a turbo does? In other words, the larger the post-SC volume, the more time it takes to raise the pressure, no?

Must be amazing to drive the car with this kind of grunt. Would love to hear if/how it changes your approach on track. Looks very nice too... there's just somthing about all that piping .

Thanks!
LP

[youngkang]

1

[Thomasio]

After the supercharger. Negligible lag.

[Lotus-Position]

got it, thanks.

[funS111]

Would also love to see some pics! That is awsome power on stock pully.

Great tune.

[Lotus-Position]

FYI: there are some pics on the proalloy site: http://www.proalloy.co.uk/cgi-bin/si...87&id=proalloy

[Thomasio]

Does anyone know how many BTU/hr the proalloy setup is able to move?

I'm guessing that the stock Exige S intercooler (aftercooler) is capable of something like 50,000 BTU/hr, but I'd love to hear from someone who has a more reasoned guess or some actual data.

[hackzi]

Wow... I must get some too! Good stuff Ade and thanks for posting!

More thoughts after some more miles perhaps?

[Ade]

Thought I would start with a few pics of it installed.







Not sure about the expected btu/hr figure but this charge cooler setup use in my car handles the cooling for 380bhp turbo audi installs in Exiges so it easily copes with my 300hp, maybe email Wayne at Proalloy for actual figures?

Not sure what I can do for a video, might try to do one of the speedo?

[Thomasio]

Ade, your mandrel bent aluminum intercooler tubes will really complete the beauty of that install. They should be shipping early next week. Those heavy cast pieces have no business on a Lotus.

[Ade]

I now can't wait to get them to, have you checked to see what the weight saving is?

[Bgwilly31]

Originally Posted by Thomasio

Ade, your mandrel bent aluminum intercooler tubes will really complete the beauty of that install. They should be shipping early next week. Those heavy cast pieces have no business on a Lotus.

good point. I never thought of that before.

This procharger sounds like a great concept. But it also sounds like it adds some weigh too. With an additional radiator, a water pump, lines.

The weight you save from the aluminum piping probably wont add up to the additional weight you added from the procharger.

[jkolb]

Did Charlie have to modify the standard Gotham tune to cope with the larger injectors?

Jerry

[Ade]

Originally Posted by Bgwillyelise

good point. I never thought of that before.

This procharger sounds like a great concept. But it also sounds like it adds some weigh too. With an additional radiator, a water pump, lines.

The weight you save from the aluminum piping probably wont add up to the additional weight you added from the procharger.

To be honest the A/A intercooler is so bad it may as well not be there if you live somewhere hot, I never got the weight of the new cooler but in comparison verses the extra power that on it own produced there is no competition, the extra was 20whp..... now people complain about the dyno results no been meaningfull etc, but the seat of the pants doesn't lie and it was a definitive improvement
Adding the Gotham just made it amazing

[alexandertg4]

This sounds great. Too bad that charge cooler is a million bucks haha.

[Ade]

Originally Posted by jkolb

Did Charlie have to modify the standard Gotham tune to cope with the larger injectors?

Jerry

Sadly the UK cars come with 330cc so they needed changing to the same as the US spec of 440cc, however from what I can gather there was a whole bunch of other changes made to suit the euro cars.