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Dan,

The oil pressure warning on a hot restart is usually a sure sign that you need to change out your oil thermostat that's right above the oil pressure sending unit. Definately a freak out moment the first time it happens.

Bill Ball

Greg, thanks for taking this on. I've kept my stock radiator, just repairing it as needed, even though it was a weak link with the plastic sidetanks and marginal cooling capacity in hot/high-load situations, because I didn't think the available alternatives would make any worthwhile difference. The only thing I had considered was moving the oil cooler on my 89 to the later external setup to reduce to load on the radiator. So, I'm real glad to see the discussion of the advantage of the in-radiator oil cooler and that you will have a hose option for using both.

shmark

I appreciate you have had issues and maybe he is eliminated for you, but being a competitor you're making a pretty big leap to "eliminate" him for Hammer. There is nothing to "make" me understand. Carl has a product, you are about to have a product, and the two are not connected. I wasn't trying to tell you to source parts from him. I was responding to Hammer's request for information without any connection to you whatsoever. I would think positive reviews of any vendor are nothing but good for the community. When I was shopping for radiators I sure appreciated different sources and experience, and I chose accordingly. Carl has provided me excellent service and an excellent product, and my car stays nice and cool with the a/c running in the Atlanta heat and humidity. I'm sure yours will also be a quality piece and I hope you have happy customers too.

Back to the Greg love-fest.

GregBBRD

Exactly. Now imagine what would have happened if you came onto a traffic jamb and had to idle for 20 minutes.....

New cams please.

You will soon be able to use a radiator cooler and your stock cooler, with a custom set of lines and a radiator with an oil coller built in. The absolute best of both worlds. It should be virtually impossible to get oil temps. over 220 degrees.

dr bob

I was under the impression that the later separate oil cooler is NLA. Is there a substitute? It would seem that the perfect solution would route oil through the external and then internal coolers in series. I know a guy who can make the hoses real pretty too...

GregBBRD

Absolutely understood.

Hammer can buy whatever he wants from whomever he wants to...that is still a given, in this country.

I'm thrilled that you have had such a wonderful experience with Carl and his radiator. It is good to know that he builds a good product.

I'm not sure I understand your need to post the final line, however. Doesn't seem necessary, in a discussion, like this.

GregBBRD

I've had no recent problems buying new ones...I'll check on availability.

Bill Ball

dr. bob: The coolers seem to come available in batches from time to time, then go NLA only to show up again later. We interpret NLA as gone forever, but that's not the case, at least with some parts.

GregBBRD

Porsche currently has 89 of these oil coolers, in stock.

Retail price is $394.13...which is a bargain for any high quality oil cooler...especially one from Porsche.

blown 87

Greg, couple of questions, will your new radiator have the coolers in the same location as the stock ones, so if some one wanted to add the air to liquid cooler using your hoses, and a good stock radiator, could they?

I also would assume that there would be mounting brackets that would need to be sourced to add that air to liquid cooler and are they available and will they fit on any 928?

Lastly, it seems from the discussion above that any one who lives in a hot climate NEEDS one of these, is that true for a pure street car?

Thanks

shmark

Sorry just seemed like the discussion became fixated on one product. No doubt it will be a good one, you have an excellent reputation. Anyway back to topic, if you live in a hot climate I can say that a larger aluminum radiator, made well, will definitely help in a hot climate. With the stock radiator my car was borderline on a 95 degree day in traffic with the a/c on. To the point I would turn the a/c off and get the revs up to stay cool. With the new radiator and thermostat-controlled fan, it stays below the upper line. Definitely a worthwhile upgrade.

[edit] I know about my old bimetallic setup. Not sure if mine wasn't working so well or that old belt-driven fan was simply marginal. I do know that the new radiator and electric fan is a huge improvement here in Atlanta.

blown 87

I wonder what criteria that Porsche uses to make a part again?

GregBBRD

Greg:

Actually, this all started when it occurred to me that we could add a radiator cooler into the late model cars (post '90.) They suck in traffic, as I mentioned. Since we usually install a 928 International universal radiator into these cars (cheaper than stock), all of these radiators had an engine oil cooler in them anyway...that was just sitting there doing nothing.

We rounded up all the old hose sets we could find and then made both replacement hoses for the stock oil cooler and then made up hoses to add this "extra cooler" (in the radiator), to the system.

Our oil cooler will also have the hoses in the approximate stock location, although the hoses will need to be slightly different, because we are going to use AN threaded oil coolers and build AN to German adaptors for the cars that use the stock hoses. (Anyone that has used either a Devek or a 928 International radiator has had to remove the stock oil cooler adaptors from the original radiator and then install them with a stack of aluminum washers into the aluminum radiator. This offends me, so whenever I install a 928 International radiator, I machine these fittings down, so they only use one sealing ring, not a stack. I'm doing this differently, so the "home" guy doesn't need to use the original fittings, eliminating this problem completely.

The post 1990 cars are the ones that really suffer, as they have nothing but air cooling the oil...which clearly sucks, in traffic.

Yes, every single one of these cars needs to be modified to have the extra "water cooler"....unless they live somewhere where there is very little traffic and the outside temperatures are very mild. (Like Germany)

Certainly, if someone had an existing radiator with an oil cooler on the driver's side, they could add this cooler into the system, with only a hose set. This means that anyone that has purchased one of 928 International's universal radiators and installed it into their post '90 car could simply change the hoses and be done.

I'm not far enough along to have brackets and pieces to modify the earlier cars (pre '90) to accept an additional air to oil cooler...and I'm not sure these people have as big a problem....since their oil temperature should follow the water temperature fairly closely. However, cars that have a supercharger system might be taxing the oil temperature, even on these cars, so we will be making pieces to add this cooler to these cars.

Does this answer your questions?

GregBBRD

I agree. We see good temperature improvement with the radiators we have been using from 928 International, even on the cars that have electric fans. We all need to remember that most all of these cars are 20 years old and the stock radiators probably don't work as good as they did, when they were new. Combine that on an "early" car with a belt driven fan and fan clutch that is 20 years old and you can have a very warm running car.

karl ruiter

Just tell Mark that he has to carry your radiator or you will make his car run slow. On the other hand, I'm not sure a slower car would change his race outcomes much....He would just get more aggressive.