Momma always told me that if I couldn't say anything good that I shouldn't say anything at all and I'll certainly take the "High road" on this one and only give you some facts.
All I can say is that you should read my posts from my 18 months of cooling system testing from back in 2003 for more info and that one should look at these pages from my recent 3,450 mile cross country R&D trek very seriously- a major portion of this test was cooling system R&D- especially the effects of engine bay and fan inlet temps Vs net cylinder head and oil temperatures.
Jake's 3,450 mile tripWe averaged 76 MPH over a 4.5 day span testing all sorts of things, climbing the Continental divide and giving the engine not one rest and ZERO maintenance. This should speak volumes for dedication and the abilities of our 170HP, 2270 engine. For a few stents like the one below we traveled at speeds in excess of 100 MPH for as much as 15 miles at one time with confidence that the engione would perform flawlessly while data logging our information and sharing it in real time here on the net.
here is one portion of a dat log that we gathered. Note the AVERAGE speed was 81 MPH over a span of 67 miles! At times we were over 100 and had to back out of the throttle due to highway patrol activity. Now note the head temps and the fact that they are COOLER THAN A STOCK 2.0 ENGINE!!! Then note how close together all the tremperatures are and think aboutb the fact that the stock system has a typical SEVENTY FIVE DEGREE temperature differential at all times on even a 100% STOCK engine, this engine was making 70% MORE power than stock, ran cooler and with less delta! I had over 25K bucks worth of test gear in the car to gather this data and a third party Medical engineer in the back seat that specializes in data acquisition as a primary objective in his daily job to run the systems while I drove the beast.
Sitting your ass in the driver's seat of a 1966 Beetle for 23 hours straight, only taking piss breaks and making gas stops takes serious dedication, that day we traveled from Chicago to Denver in one day fighting 50 MPH head winds through the plains all the way! I love to push things to the max while my competitors sit at home and drink a glass of tea, this isn't a job for me and my team- its our lives and thats why we will not be superceded in any aspect of the TIV engine- period.
The information that one needs to make a sound decision is right here on the net, it will be apparent read this page about one of my F production racers for some of that info
What happens when one ditches the 911 system Here is a quote from a recent post on my forum from a DTM owner
QUOTE
Yea, I was one of those non-believers thinking that the stock system was good enough for VW so it must be good enough for me. So my head temp was normally 425F (measured on cylinder number 3 only), big deal. At least it wasn't 450F! My heads were rebuilt and guranteed not to drop a seat by Mark Stephens HP in the hills of California. I'm not knocking them in an way, the heads haven't dropped a seat yet and they've been subject to 450F temps.
So I've been running type 4's for 20 years now and the most annoying problem was that I had no room for a decent exhaust system because of the stock shroud. My initial reason for purchasing a DTM was to have more room for a quieter exhaust, not a cooler running engine!
So I watched Jakes video once through, read the instructions and started putting it together. Had a couple questions and as always, Jake got back to me in a timely manner. I was finally able to build a cleaner and quieter exhaust system, but that wasn't the best part. I was now equipped with a Westach dual CHT gauge to see what both sides of the engine were doing. On my initial drive I swore the gauge was broke. 300F??? I've never seen temps that low! I have purposely tried to raise the head temps by running that engine hard on the hottest days of the year. Most recently, the ambient temp was in the mid 90's while the cylinder head temp remained 275-300F.
The engine BTW, is a 2270 that I personally built, balanced by Jake. Its had a few hiccups and I've probably spent about as much as it would have been to just have Jake build the whole setup and send it to me BUT I never would have learned as much as doing myself.
I've got to thank Joe Locicero as he was the original creator of the DTM shroud concept (I'm sure he's smiling down on all of us). Jake, you've taken his dream and made it a true success through your hard work and perseverence. I can't thank you enough.
So, thats more than I should have said- all I will add is the wise customer spends his money for the most effective and most thoroughly developed component- period.
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but I haven't seen it discussed before, so...
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