Has anyone considered or even fitted a water injection system to an Exige S?
I’ve heard of some horrific charge temperatures due to the crap Lotus designed air to air intercooler system. Apparently Komo-tec claim recording 80deg C and I spoke to Plans MS who say they’ve recorded temperatures of around 90 Deg C, which is rubbish. No way the engine would produce 220 hp at these kind of temperatures.
My tuning experience is all Cosworths and my exsiting track car has a water injection system controlled from the ECU to kick in at 45 deg C MAP temperature when the boost reaches 1 bar. I have an air to air intercooler, which is quite considerably bigger than the Exige S intercooler and with the help of the water injection, even on track I rarely see temperature over 40 Deg C. The effect is quite drastic when the Watre Injection does kick in and it drops the temperature within seconds. This system seems a good way of making the Exige S engine safer and produce the power more reliably, without tailing off with increased intake temperatures.
Are you quoting before or after intercooler temps ?
A discharge temp before intercooler of 90C [194F] is not that bad, I’ve seen 152C [306F] before the chargecooler at 15psi…and 73C [165F] after with 46C [115F] ambient… and I make 310rwhp…
Sorry I was wrong, Plans said they had recorded pre 90 deg C and post 60 deg C. 60 os stil dangerously high in my oppinion. My track car is a 3 door Sierra Cossie and my ECU records temperatures usually around 40 Deg C even after 20 mons of hard track time.
I’ve tracked my Cossie in August at the RS National Day, so ambient temperatures were quite hig. The only time I saw 60 degs was when the car had been standing after a track session.
There is one for sale at the minute on pistonheads, I think for about �90k. Great cars. I remember getting a brochure for them when they came out. I think they were about �30k, but back then you could probably have bought a couple of houses for that!
Just surprised no one has fitted an Aquamist to an Exige S. Maybe I should be the first.
Lovely RS200 Frank. Love 'em. Why did you sell it?
I had a street model and then 106 which was the only street reg RS200E ever…with a real 900hp…at the time I felt I had been there and done that, so I sold off all my group B’s and bought this… :grin
I’ve tracked my Cossie in August at the RS National Day, so ambient temperatures were quite hig. The only time I saw 60 degs was when the car had been standing after a track session.
Kev…I was there too…wasnt’ that hot to be fair…dreadfull day…we were shivering in the car park!
Back on topic…
we have also tested the Exige ‘s’ and you are right … VERY high temps…
We tested at plans last january…we saw 60+ deg c and it was snowing!
There were two problems really…
poor air flow to the intercooler
Heat radiated from the engine into the intercooler therefore creating an interwarmer!
water injection would help stop potential detonation but probablly woud not liberate much power…
The real solution would be a charge cooler…
I’ve tracked my Cossie in August at the RS National Day, so ambient temperatures were quite hig. The only time I saw 60 degs was when the car had been standing after a track session.
Kev…I was there too…wasnt’ that hot to be fair…dreadfull day…we were shivering in the car park!
Back on topic…
we have also tested the Exige ‘s’ and you are right … VERY high temps…
We tested at plans last january…we saw 60+ deg c and it was snowing!
There were two problems really…
poor air flow to the intercooler
Heat radiated from the engine into the intercooler therefore creating an interwarmer!
water injection would help stop potential detonation but probablly woud not liberate much power…
The real solution would be a charge cooler…
I didn’t go to the RS Nat day this year. Too lazy to travel to Rockingham. Been the previous 3 years though.
I have one of you Intercoolers, turbo coolers and Radiators in my Cossie. Very nice kit.
So if you are developing a proper charge cooler for the Exige S then keep me in mind.
I’ve tracked my Cossie in August at the RS National Day, so ambient temperatures were quite hig. The only time I saw 60 degs was when the car had been standing after a track session.
Kev…I was there too…wasnt’ that hot to be fair…dreadfull day…we were shivering in the car park!
Back on topic…
we have also tested the Exige ‘s’ and you are right … VERY high temps…
We tested at plans last january…we saw 60+ deg c and it was snowing!
There were two problems really…
poor air flow to the intercooler
Heat radiated from the engine into the intercooler therefore creating an interwarmer!
water injection would help stop potential detonation but probablly woud not liberate much power…
The real solution would be a charge cooler…
I didn’t go to the RS Nat day this year. Too lazy to travel to Rockingham. Been the previous 3 years though.
I have one of you Intercoolers, turbo coolers and Radiators in my Cossie. Very nice kit.
So if you are developing a proper charge cooler for the Exige S then keep me in mind.
Yep National day was awfull this year…bring back Donny!!
We will be doing something for the ‘s’- The car is in the workshop at the moment …
Kev…I was there too…wasnt’ that hot to be fair…dreadfull day…we were shivering in the car park!
Back on topic…
we have also tested the Exige ‘s’ and you are right … VERY high temps…
We tested at plans last january…we saw 60+ deg c and it was snowing!
There were two problems really…
poor air flow to the intercooler
Heat radiated from the engine into the intercooler therefore creating an interwarmer!
water injection would help stop potential detonation but probablly woud not liberate much power…
The real solution would be a charge cooler…
I didn’t go to the RS Nat day this year. Too lazy to travel to Rockingham. Been the previous 3 years though.
I have one of you Intercoolers, turbo coolers and Radiators in my Cossie. Very nice kit.
So if you are developing a proper charge cooler for the Exige S then keep me in mind.
Yep National day was awfull this year…bring back Donny!!
We will be doing something for the ‘s’ …
I assume with Plans MS. I’m interested in more power too. 250 hp minimum.
Happy new year guys… I installed the Pro-Alloy Radiator/AC condenser/Heatexchanger along with a 170F thermostat in my car to compensate for the added heat flowing off the heatexchanger and this is what I found…at a cruise on the Hwy at 70mph 75f ambient, water temps were 182f and the chargecooler airtemps were 1-2f below ambient…that’s right below…Under high loads through the canyons the temps water temps were 190-200f and the charge air temps are 35f cooler. The recovery time is so fast due to the larger cooling surface that the chargecooler water never heatsoaks…This is gonna be a “Very Cool Year”…
Ade, you should have your thermostat replaced with a 170f unit…trust me on this…The additional heat and the fact that you have the phisical restriction in the air flow from the heatexchanger mounted in front of the rad/AC condenser combo, my engine temps rose 15f…all is cool with this setup…
I will see how it goes here as we get closer to summer (spot the joke in that statement) So far so good, its weird how the supercharger noise has changed though
I had a street model and then 106 which was the only street reg RS200E ever…with a real 900hp…at the time I felt I had been there and done that, so I sold off all my group B’s and bought this… :grin
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