What makes this radiator different is the spacing between the fins. The core is used heavily in offroad racing applications where dust, mud, and sand are encountered. Normal street radiators do not have the ability to clean out themselves due to the spacing. the Esprit is a whole different matter. The fins, if you call them fins, do not allow any debris to pass through. As an example, if I take a pound of sand and pour it on the esprit stock radiator, only a samll amount will exit the other side. Well guess what, this hinders the operation of our radiators and also causes them to rust/deteriorate out due to retained moisture in the core fin/plates. Being that our cars are low, the front is like a vacuum for any debris on the road. Every esprit will have this problem and sooner or later you will have to replace the core. In addition, the sand clogged into the radiators actually ends up insulating the core and thereby not allowing the radiator to work at all. As an example, before my car would overheat in minor traffic. The fans would come on and it would take forever for the temp to lower. Sometimes, I would have to just exit and let the car cool down. That's just plain ridiculous if you ask me. I would have to drive at a faster rate to get the temp to lower. With the all aluminum radiator, once the temp rises to kick on the fans, the engine temp lowers immediately to 82 c. Weigh your radiator before you clean the fins out and pounds of dirt and sand from normal road driving will come out. When the stock radiator is new, it works fine for the 4-cyl engines. However, according to Harry, it is way undersized for the V-8. Lotus has great engineers but I can tell you one thing, to cut cost to make the mark affordable, and profitable, you will cut corners if it perfoms a task for the normal service life of a car which as we all know is ten years before seeing a wrecking yard. That how management thinks!
So, to give your esprit what it deserves, give it an aluminum radiator. It will run better, have higher horsepower, and have the reliabilty that the engineers always wanted it to have. Don't rebuild your stock unit, your wasting your time and money because it is a long job to replace/clean a radiator. Just get something new or fabricate your own. Better yet, call and order one from Harry. I did all the research and work for us. If I was the Lotus engineer designing the cooling system, this would have been the radiator I would have put in. But of course, management would have turned down the idea purely because of cost. If you don't believe me, adore the esprit and continue to ask why they did this and that when you yourselves would have done this. Take a look at our tail-lights and ask why toyota. Answer: it is cheaper, we don't have to make a new mold, we don't have to get DOT approval, toyota did that for us. Plus, we may only make a few hundred cars anyhow! Think about it. Our esprits are great, but they are still a profit machine for a great company who had a great founder.
List of things to make the esprit great!
Viking/Rytek Projektz all aluminum Radiator
RC Engineering or equivalent injectors
Ball bearing Turbo
Race code #6 chip
Spax Adjustable Shocks
Light weight Racing seats
and a driver capable of controlling one to the best cars in world!
If you want this radiator, I can take orders that are only out of California. All orders will be with Harry in California and also, he stocks the radiator and not me. Therefore, you will have a wait time if ordered through me because of fabrication and lead times. I cannot sell it cheaper than Harry due to our arrangement. There are about 20 of these radiators in use and none have had any problems and customers have commented that why they didn't do it sooner. I am not sure if I can sell overseas because the cost would be to high. Hopefully, someone in your country will take the initiative like me to design one comparable. Note, the radiator has 3 Spal fans and new waterproof connectors. Not the cheesy stuff that the oem had used.
Cheers and know that in a recent European car or something I had just read, the Lotus esprit was nominated as one of the TEN BEST turbo cars ever to have been made. In the list was: Renault R5 turbo, 911 Turbo, Lotus/Omega turbo, Audi S4 b5 Turbo, and a few others. Lotus has 2 and I can give my hat down to Collin if he can see what his legacy had created.
if any of youu are in the Ventura CA area, please stop by one day and we can chat!