Inlet charge temps

Of course! I had the wing setup not the over the top one! It might be tight still I think fella to work on!

I knew Chris had moved on as well, but one of the other mechanics ( Specky ) is more than upto the job.

Talk to me offline regarding RST. I would be interested to hear your views.

Yup it’ll still be tight I imagine… but I’m getting used to that. Plus I have a pair of newborn hands I can draft in now to help out :smiley:

I’ve dropped you a PM, as I’m sure you’ll read I think I need to just get back to RST and get over the past. They’re a very good local resource to have, and by avoiding them I’m limiting my options big time.

Charge cooler does not require a remap, my car had back to back tests for the first proalloy charge cooler, the gained some torque and a little bhp but not enough to trouble the gearbox, what you do gain however is consistent charge temps therefore sustained performance all the way through a session.
I would fit 2 pumps to the setup though as one did struggle. I think they now use a bigger single pump than I had though.

Cheers Ade, that’s good info. I had read about the early pumps being a bit naff - I understand they’re using a bosch unit now but I don’t know the details. I assume it’s a fairly common part that can be picked up if I feel like another should be added.

Did you fit one pump up front and one in the engine bay?

The back to back tests are good to know, I imagine a standard dyno setup lends itself quite well to proving the capability of a chargecooler - as the standard A2A intercooler just can’t get any airflow from a static position (and even on the road it struggles as this thread testifies!). I’m not hunting for BHP here, but after spending some time logging this summer and seeing just how influential ambient temps can be on the OEM setup, I’m sort of hooked now on finding the optimal solution!

I used a pull pump and a push pump either side of the charge cooler in the engine bay, mine was using bosch pumps albeit a smaller version than some I’ve seen. This I think gave me the best of both worlds, performance and some resilience.

Thanks again ade. It does seem like Pro-Alloy are constantly tweaking the kit so it has evolved over time. I’ve read a few reports about leaking heat exchangers too so hopefully they’re on top of that!

This is the pump mine used https://www.ebay.co.uk/itm/Water-pump-electric-for-water-Charge-air-cooler/323947790562?hash=item4b6ccb00e2:g:bHwAAOSwAPpds3Nm
I think it is identical to what proalloy still supply https://www.ebay.co.uk/itm/CCLEXIGESKIT-Pro-Alloy-Lotus-Exige-S-Charge-Cooler-System-Complete/283341100294?hash=item41f8721506:g:DHEAAOSw6S9cPzZ9
The claim of 20hp was gains in mid range rather than specifically peak HP, but the difference was clear when I got the car back, I always felt it gained a lot in midrange torque and would also give you a consistent 20hp gain rather than what was more likely a 20hp loss from the engine pulling timing due to increased inlet air temps which always made the engine feel flat when it was heat soaked.

Yep that looks about right. I guess for the cost it’s really worth sticking an extra pump in there, as you say for redundancy as much as anything.

The second pump certainly increased the flow rate in the system, I have no test results showing any real world improvements, but flow rate in charge coolers are important and the length of pipework and capacity of the system suggests that 2 or a bigger pump are really required.

Redundancy is the only reason I would consider it. I did some research and I concluded that flowing more water will not always yield better cooling rates. Obviously if your flowing 1l/min its not going to be optimal…

This pump is still supplied ( well as of mid last year )

Cheers Andy.