Just bought an intercooler for under $50. It's off a dual turbo RX-7

Now to see if I can make it fit!!!

Stephen

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85 300D 305K miles WVO(105K so far), Mine
82 300SD 235K miles BIO-D, Wifes
96 F250 SC PSD 4X4 285K MILES BIO-D, Ours
89 BRONCO 182K MILES sold
Finally Compression Ignition Only!

RX-7, hmm is that a front mount intercooler? What size core? The problem with intercoolers is that they block the air flow to the radiator, fortuantely our systems were way overdesigned but it may cause your car to run warmer more frequently. Where do you plan on putting it? If it were just adding the IC I would give it a shot but since the turbo goes right to the intake manifold it means there will be a little bit of work in routing the air, doesn't excite me very well. I wonder if you had the air enter the intake manifold straight and just used a elbow on the turbo after cutting the neck off the intake manifold if it would work that way.

One other thing to think about since I didn't pay attention to your location is that a IC in winter time would mean the vehicle would probably run worse most of the time in cold weather since the air charge is cooled like it is but I bet it would drop the EGTs a healthy bit so you could boost/fuel up higher.

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

No cutting of any engine part is needed. There are two clamps and 4 bolts holding the compressor housing in place. All you need to do it loosen those 4 bolts and rotate the housing until the turbo outlet is at the desired angle. Then you may use the stock turbo-manifold connecting tube to put the pipe on. No damage to the engine parts.

Finding a good mounting point for the intercooler is very important. You wont fit it infront of the radiator without completely removing the A/C condensor. Wherever you put it, adding a small high-speed fan to it will make a big difference in lower (low flow) speeds. Placing it in the place of the panel in the red area would be the best spot if you want to keep A/C.

Side note: DO NOT use PVC tubing for anything but non-running mock-up. It can't take the heat and will melt/release harmful fumes. CPVC might stand up to it, but you sould do more research into that.

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82-300 thanks for the info. I'm in the middle of a SVO conversion right now so it will be a while before I set it up.

I was thinking it will alow me to adjust the wastegate to run more boost as well as add more fuel to get the desired results. I will be getting boost and Pyro guages before messing with those settings.

It was a good deal and I couldn't pass on it. Now I will be forced to go through with the upgrades

I will take pic's as the project comes along.

Stephen

__________________
85 300D 305K miles WVO(105K so far), Mine
82 300SD 235K miles BIO-D, Wifes
96 F250 SC PSD 4X4 285K MILES BIO-D, Ours
89 BRONCO 182K MILES sold
Finally Compression Ignition Only!

I know the Rx-7 TT very well. The stock turbo boost is only 10 psi. On modified cars, going to only 14 psi blows the plastic end tanks off of the IC. That's why you got it for only $50. They are a dime a dozen. I have no fewer than ten of them in my shop.

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-ggg

Plastic tanks on an IC?! Jeeze that does sound cheap/ problematic, it would work in the stock boost range but modified boost goes upto 17psi without IP adjustments.

I wouldn't waste the money on putting a fan on the IC for low speeds since you are looking for EGT reduction only concerns are at high boost and high RPMs which generally equate to fairly fast speeds.

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

I would think having a fan on the IC would help under hard acceleration from a stop or keep the engine cooler in stop-n-go traffic with the a/c on.

I am toying with the idea of having an IC fan and a LP injection switch hooked up to the kick down switch/sensor under the gas pedal. That way nothing comes on unless the pedal is to the floor. If you have an electronic boost controller, the boost can also be raised at the same time. Like having NOS tied into the WOT sensor on a gasser.

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-ggg

If an intercooler is installed as an aftermarket attachment, do we have to compensate for the boost pressure as the intake gets restricted?

An IC does not impose restriction but does cause a pressure drop as the air cools. The boost will have to be adjusted upward. On one of the IC install threads, the owner reported a full 2 psi drop.

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-ggg

hello everybody...

intercooling is all math...thats all there is to it.

please make sure that the one you install is optimal! you need to know what your flow rate it, the stock intake, all of the cfms, the intercooler does impose restriction and thus will lower boost pressure - along with cooling the charge...but as we all know lowerer intake temps are better for us, therefore you need to create the piping as smooth as possible, this will also reduce your turbo lag...

i too am looking at intercooling and the one that is size to my needs will fit infront of the radiator, behind the grill and have the tanks very close the the ends of the radiator...it has to be custom fabed to fit...it is very small, just flows the correct cfm, with the proper delta t chart...

be aware of ebay crap...analize the equipment...
jake

I guess my whole train of thought is that the A/C will have it's own fan, the motor already has its own fan, why do you need another? Perhaps it will heat soak after setting long enough but by having more electrical load it only creates more drag on the motor. I can feel when I turn my climate control on, not just the A/C but the work the alternator imposes on the motor. Do you think the gain of having a fan would be more than the loss imposed by the alternator?

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Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k

Check this out:

http://forums.turbobricks.com/showthread.php?t=11333

As for the end caps, use a couple of straps around thge intercooler to keep the end caps from blowing off or leaking.

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Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.