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twin turbo intercooling

Hi all I am trying to fit this all in what little space is left.. so has anyone tried water to air or as I have seen drag racers use ice to air intercooling.. I have tried to fit the 2 intercoolers I have inside of bumper ends.. left is ok but oil tank is in the way on the right .. plus I do not want to cover flat fan setup with a traditional Porsche style cooler.. if anyone has pictures of there setups that would be great.. P.S shortened G50 fitted in the chassis and sorted out the clutch rubbing on the inside of bellhousing.. cheers..
Old 11-29-2017, 01:19 AM
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what engine do you have in there.
the fan looks like a 935 fan
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Old 11-29-2017, 03:58 AM
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For best engine display purpose I would hide them in front of the rear wheels. You should have a big air duct in that location as well. Air for the brakes can be re-routed.
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Old 11-29-2017, 04:25 AM
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Should go Ctr1 style, the only way to fly!
Old 11-29-2017, 04:59 AM
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More pics of that monster!
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Old 11-29-2017, 08:31 AM
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CTRs had the oil tank ahead of the wheel, not behind it.

If you install a 964 or 993 oil tank, you can install the intercoolers like the Yellow Bird. All the electronics and filters on the left side of the engine compartment are obviously relocated as well. Air evacuates out the wheel wells, which is why on all his later CTRs Ruf slotted the rear bumper and valence -- get the air out.

We've done several cars with air:water intercoolers. They are extremely efficient, and would mount to the end of your horseshoe plenum. You will have to add a reliable 12V pump for the coolant and decent radiators on the front of the car (or ahead of the rear wheels if you have RSR ducts) to expel the BTUs.
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Old 11-29-2017, 12:28 PM
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Remote oil tank up front in the smugglers box if you don’t want to use a 964 or 993 tank.
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Old 11-29-2017, 05:28 PM
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twin turbo intercooling

firstly GJF wow what a setup.. ok if I do mount coolers in front of the rear wheels then I would need to add vents to supply air to them... I would prefer to keep the clean look with no vents.. so could I use 2 small 12v fans to cool them down.. then do you think the pipework would be to long going from turbos upto the front wheels then return to the horseshoe plenum would this cause a pressure drop ...
Old 11-29-2017, 05:39 PM
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Quote:
Originally Posted by porsche 930twin View Post
firstly GJF wow what a setup.. ok if I do mount coolers in front of the rear wheels then I would need to add vents to supply air to them... I would prefer to keep the clean look with no vents.. so could I use 2 small 12v fans to cool them down.. then do you think the pipework would be to long going from turbos upto the front wheels then return to the horseshoe plenum would this cause a pressure drop ...
Side mounted air:air intercoolers ala CTR:
The intercoolers will not need fans on them. When the car is moving, an incredible amount of air is coming through the top of the wing, more than enough to provide cooling air for the engine fan, fresh air for the air filters, and cooling air for the intercoolers.
Ruf used to mention this in an engineering presentation he would give to technical colleges. His early cars had NACA ducts atop the rear fender arches to cool the side-mounted intercoolers which dumped air into the engine bay. After building a few cars, he tested one in a wind tunnel and was surprised to find that above a specific speed, the cooling air no longer flowed in the intended direction -- it would reverse and flow from the engine bay, through the intercooler, and out the NACA ducts in the fenders. After this discovery, subsequent CTRs no longer had NACA ducts, and instead had dozens of ventilation slits in the rear valence and bumper.

Air:water intercooling:
Perhaps you're not understanding how this would work.
You would have one intercooler on the horseshoe, and your charge pipes would run from the turbos to the inlet tank of the intercooler. The outlet side of the intercooler dumps directly into the horseshoe.
The other flow direction of the intercooler, left to right, is cooling water instead of ambient cooling air. The coolant (mostly water) flows out of an end tank and through a hose to the front of the car, through a radiator (or two) and back to the other intercooler end tank. A pump circulates the coolant.
You could probably mount the radiators ahead of the rear wheels with good fans on them, and make stone guards to protect them, but having them directly in airflow is ideal, ex: front center-mounted radiator in place of an oil cooler on a 930.
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Old 11-29-2017, 07:13 PM
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twin turbo intercooling

Thanks Chris you have given me an idea... I thought I would run it past you.... I can remove the engine fuse box don't need it... cut through the wall and have one intercooler halve in engine bay and halve in the wheel well with 2x pipes in and 2x pipes out to the horseshoe plenum. is there a rule for intercooler size... I know bigger is better but???? also would I still need 2x blow off valves or just one.. cheers
Old 11-30-2017, 01:14 AM
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Quote:
Originally Posted by porsche 930twin View Post
Thanks Chris you have given me an idea... I thought I would run it past you.... I can remove the engine fuse box don't need it... cut through the wall and have one intercooler halve in engine bay and halve in the wheel well with 2x pipes in and 2x pipes out to the horseshoe plenum. is there a rule for intercooler size... I know bigger is better but???? also would I still need 2x blow off valves or just one.. cheers
Are you talking about the little fuse panel in the engine bay? if so, I have ripped all that out of mine. All of my relays, etc, are under the pass seat
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Old 11-30-2017, 04:55 AM
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We used water intercoolers


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Old 11-30-2017, 05:33 AM
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I didn't follow through with the 300ZX coolers in front of the rear wheels because the routing of the 2-1/4" plumbing was torturous and lengthy. It might be better with some rectangular-section tubing to clear the tire. Also may not have the best boost response. Still considering it, however! There is some air left over for a brake duct.

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Old 11-30-2017, 05:45 AM
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Old 11-30-2017, 05:46 AM
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[QUOTE=VZ935;9831780]We used water intercoolers

You have too much cool stuff, V!

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Nothing better than car porn in the morning... Damn, I love this forum!!
This is so much more fun and interesting than another "which oil" or "what's my car worth" thread. :-)


John -- I think having a single side-mount intercooler with dual inlets isn't a good idea, think how wonky the plumbing from one turbo over to that IC will be.
You have the horseshoe made and polished. If you're going to use it, my vote is 1x air:water or 2x air:air coolers.
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Last edited by TurboKraft; 11-30-2017 at 09:26 AM.. Reason: edit
Old 11-30-2017, 09:24 AM
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