FAO Bren re: Chargecoolers.

[Billy]

Do you think there is any chance of getting some numbers out of your supplier for efficiency and pressure drop etc. since Pace weren't too helpful. I asked for efficiency and pressure drop figures for their 2 and 3 core coolers at 10-15psi and an airflow of, er, I can't remember off hand, but it equated to 6500rpm.

This is their reply:-

As a rule on a turbo car you will not experiance a problem with pressure
drop with a chargecooler because of the way a turbos boost control systm works it will compensate for any difference in area encountered to a point!
The pressure drop we see on the chargecoolers is from 2 - 4 psi across the range, the only time we have to allow for pressure drop is on supercharged cars where the boost to enginge rpm is fixed and cannot compensate
automatically ( like a turbo ) in these cases we have to regear the supercharger to get the boost back up .If i can be of any further assistance please do not hesitate to contact me .

Regards Jon Norman

which is about as informative as a Peter Mandelson interview.

D'ya think your people might be more forthcoming?

Cheers, Billy.

[Jezz_S13]

Can you not just get two escort cossie ones and run them in parallel?

[bren]

The companies Id use for charge coolers are either PACE or GRS. PACE wont be any more forthcoming with info to me than they were to you. Try phoning them on 01284 850960 and ask for Wayne :)

My guy at GRS hasnt any figures for any of his products other than charge air temps thats have been recorded by his customers that have tried his products.

Ther guys making the intercoolers for me dont do chargecoolers as a rule because few racing cars use them so their data will be limited. We certainly havent got one ready to go for a S13 or S14.

[Billy]

Ho hum.

I feel a home build coming on.

Oh well, at least that way I can have a copper core...

[bren]

I can get one made for you if thats what your after but youll need to send me a design to work from.

[Billy]

I just might do that.
Can you get the core tube dimensions and spacing etc, and would it just be the air-air core the other way round? Not that that's a problem or anything.

I wouldn't ask these awkward questions, but I'm curious to know how accurate the various formulae are for this car.

Charge air temps and boost for other users would be interesting, if not actually useful (unless they have inlet temps too).

[bren]

It will just be a jacketed intercooler.

Dimensions all depends on whos making the chargecooler for you but if we go with my race guys then the tube height is 6.7mm and gap 8.5mm.

As they dont make chargecoolers often they dont have ACT data and anyway unless you do a comparison on the same car any judgments based on other cars temps is meaningless.

A S2 ERST running 18psi will see around 45 degrees with just a chargecooler but as I say that doent mean anything if you want to fit one to a 200.

Why not just go the ic route and save yourself a load of hassle?

[Billy]

Originally posted by bren:
<STRONG>
Why not just go the ic route and save yourself a load of hassle?</STRONG>

Someone has to do it! :)

Besides, I'm after sub 100mph performance with minimum lag, so there's no contest really.

[Asht_200]

Originally posted by Billy:
<STRONG>

Someone has to do it! :)

Besides, I'm after sub 100mph performance with minimum lag, so there's no contest really.</STRONG>

You'll find Stuee69 has a chargecooler

[Billy]

Originally posted by antmcp:
<STRONG>

You'll find Stuee69 has a chargecooler</STRONG>

True, but that's just a little Cossy one isn't it?
And he runs an FMIC too.
With waterspray.
And six Umpa-Lumpas chucking fuel in by the bucket load! (Until Jez trained them properly)

I'm looking at running one big(ish) chargecooler with sod all piping.