faster

is it economically and functionally possible to convert a non intercooled 930 to an intercooled one? any cost estimates?

Dean

Yes it is very possible. Not cheap though. I think you could make a stock one fit. Or you could make a C2 one fit. Or you could make a Kokeln fit. Or you could custom build one. I did the latter. I would estimate $2000 for the later. I don't know what tail you have but count on changing it. You could also go air to water. Even more money.
Dean

emcon5

It would be kind of cool to adapt a air-water intercooler. You may even be able to fit it under the stock engine lid.

Tom

Dean

I thought about an air to water intercooler. But the time it would have taken for the engineering would have cut into driving season. It would also be very hard ($$$)to do it without a tail. There is not much room in there.
Dean

Dark Horse Racing

That and the fact an air to water intercooler would only be good for short runs before the water temps got too high. Get an air to water intercooler if you are into drag racing and have ice available to put in the water tank and only want the cooling for short distances. Get an air to air intercooler for road course racing or daily driving.

Dean

If the air/water is done right ie. separate heat exchanger for the cooling water there would be no problem with long boosted runs. It just costs more due to compexity
Dean

special tool

Dean - I think what dark horse is saying is that even with an exchanger to take the heat out of your water, you are right back at ambient temperature - so unless you provide the constant means to be below ambient, the exchanger is redundant.

pig4bill

No, it can make a big difference if you have the room. The radiator to dump the water's heat can potentially be much bigger because it doesn't have to fit in the intake stream. It's also not going to cause more lag if you increase the radiator size the way a bigger air-to-air intercooler can.

I'd try to find a production one that would fit like from a Cobra (or Merc?) because it'd cost a fortune to have one built.

Ed Bighi

Last time air to water intercoolers were used in a 911 was in the 934. They worked quite well in those cars, but the whole thing was very complex with a cam driving a pump and all the plumbing that went with it. In the 934, the intercooler was in the front of the car along with 2 oil coolers. That's why those cars had a front spoiler with so many openings. Some of the early 935's had them also, but they would sit behind the rear fender openings.

I knew a couple of guys that bought special air to air kits for their 3.0 turbos years ago. I remember them saying that the whole thing didn't cost too much. It might be worth searching around.

David J Ceruti

There is a good thread on the Pelican BB on this. Try this link: <a href="http://forums.pelicanparts.com/showthread.php?s=&threadid=79211&highlight=intercooler" target="_blank">http://forums.pelicanparts.com/showthread.php?s=&threadid=79211&highlight=intercooler</a>

Good luck and let us know what happens

David

faster

thanks for the input guys, i've had a 87 buick grand national (intercooled) there is a big bang of difference from the older non cooled gn's. i now have a 79 911 coupe and getting the turbo itch. i noticed some of the non cooled 930's were usually quite cheaper and thought if i could convert one cheap enough it would be the cats *** and a little less money in the end and still get that kick in the butt, hold on feeling.......

Dean

One difference in the cost of pre 78 and post 78 is the pre 78s have cheaper brakes. Post 78s have the nice brakes. Sort of evens out the price.

Dean