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V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, 180 degree performance thermostat in Cadillac Engine Technical Discussion; Originally Posted by RobertCTS Stealth: At the drag strip we saw engine heat as the enemy. We did everything we ...
  1. #16
    Justin83NJ is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    Quote Originally Posted by RobertCTS
    Stealth:

    At the drag strip we saw engine heat as the enemy. We did everything we could to keep the engine compartment cool. We drove up to the staging area with our hoods popped to let the heat escape. Between runs we opened up the engine bay, packed the intake manifold, carb fuel bowls and gas lines with ice bags. We wrapped our headers with insulating tape and a common thing to do was to install low temp thermos. All of this was to reduce engine heat and cool the fuel. All I gotta say is it worked. We were FAST!

    Have you looked at the CTS-VR's closely? Look at the hood. Two HUGE holes! The intake is the reverse of a scoop. That serves two purposes. Mainly it quickly removes heat and adds cool air.
    I'm a mechanical engineering student and I can contribute here a little bit.

    With all other things being equal, operating at higher temperatures and higher compression, etc. do contribute to increased efficiency (more power). With that said, there are many other variables which produce a certain range of temperatures where the engine would be most efficient. For instance, with increased temperatures undesired effects like detonation can occur.

    Wrapping headers with insulation is not merely to keep the engine bay cool; it is to keep the headers hot. The hotter the exhaust gas is, the higher pressure it has to get out. Hotter exhaust gases flow faster.

    Also, nobody will argue with you that the cooler the air coming into the engine the better. Cooler air is denser, which means more oxygen in the same volume of air. More oxygen means more fuel must be delivered for the stoichiometric mixture (not rich and not lean). This increased fuel and air results in more power.

    Intercooling a turbocharged engine increases an engine's efficiency tremendously and thus adds a lot of horsepower. For different types of engines, there is also a process called "reheating" which greatly increases efficiency as well. Power plants have these engines which have intercooling and reheating.

  2. #17
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    Re: 180 degree performance thermostat

    Justin
    Thanks for your input. I'm familiar with intercooling but share with us about REHEATING?

  3. #18
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    Re: 180 degree performance thermostat

    I'm not an engineer and I don't play one on TV either. This is an interesting discussion but with addition of sensors and computers to control a vast amount of items in the engine process, it's getting difficult to find areas to overcome the engineering built in to today's vehicles.

    I think the biggest frustration today's shop jocks are experiencing directly related to all these items are more emission related than the manufacturers intention to detune our vehicles just for grins.

    With that said, there are many discussions across the internet vehicle groups discussing virtually all these aspects. I came across this this morning and it helped me to better understand the greater picture.


    GM MAF Stuff

  4. #19
    Justin83NJ is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    Quote Originally Posted by RobertCTS
    Justin
    Thanks for your input. I'm familiar with intercooling but share with us about REHEATING?
    I didn't mean to take this thread so far off-topic, but reheaters are often a part of gas-turbine engines. In a gas-turbine engine, air goes through a compressor, is burned with fuel in a combustion chamber, then the exhaust gas turns a turbine.

    To make these more efficient, often the air is intercooled after the compressor and is then compressed again before it is combusted.

    On the other end, the hot exhaust gases turn a turbine, losing heat. Then the gas is put through a reheater and the reheated gas turns another turbine.

  5. #20
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    Re: 180 degree performance thermostat

    Quote Originally Posted by Justin83NJ
    I didn't mean to take this thread so far off-topic, but reheaters are often a part of gas-turbine engines. In a gas-turbine engine, air goes through a compressor, is burned with fuel in a combustion chamber, then the exhaust gas turns a turbine.

    To make these more efficient, often the air is intercooled after the compressor and is then compressed again before it is combusted.

    On the other end, the hot exhaust gases turn a turbine, losing heat. Then the gas is put through a reheater and the reheated gas turns another turbine.
    Justin,
    Oh my! I hadn't about turbines in some time. Thanks for the update

  6. #21
    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    RobertCTS....It is real difficult to upgrade HP levels in the newer cars unless your a very intelligent, up to date tuner, generally in business to do just that...super tune cars. These guys are around in the car community, but generally focus on high volume cars that are typically owned by people who like to spend money on making their cars quicker. Mustangs, Corvettes, Camaros/Firebirds and the like have had the priviledge of spending mucho bucks with these guys for years...some of these guys are brilliant with their upgrades, many of which have been adopted by the manufacturers. Unfortunately, the CTS community is rather small yet and has apparently not shown any significant interest in this area, hence no one is in the business as yet. I have a Viper and there's only a handful of tuners in the market...the car's production levels have stayed low since inception (less have been made since it was introduced then Corvettes made in any single year) and the Viper tuners typically charge 3 to 4 times for the same mod that is available for any of the above toys! On your louvers question, it's not unusual to find these on cars that are raced that attain high speeds...150mph and above. Can't tell you why the BMW's, Audis, etc. production jobs don't have them, but if you look closely many have them that are in professional racing functions. Keep in mind as well, many of today's higher hp cars have speed limiters (fuel cut offs, etc.) built into their ECM programming to limit top speed. Just too dangerous for the casual owner.

  7. #22
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    Re: 180 degree performance thermostat

    Wow! You gotta Viper?! You don't need to soup up your CTS for thrills.

  8. #23
    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    Let me see if I can figure out this thing....

    \image{cars}

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    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    Well, can't figure out how to post a picture! If anybody has the time, let me know! Thanks..........

  10. #25
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    Re: 180 degree performance thermostat

    Quote Originally Posted by tzoid
    Well, can't figure out how to post a picture! If anybody has the time, let me know! Thanks..........
    You need to host it on a web server somewhere (not your own computer). Your ISP probably gives you webspace; that's the perfect place to put it. Then you just need to link its address inside the IMG tags.

  11. #26
    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    1500cc....thanks much for the response. Unfortunately, haven't refreshed my Latin class in 40 years and the translation of what you wrote completely escapes me! I'll email you the pictures and you can post them for me! If not, just delete them......Thanks!!

  12. #27
    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    Oh well, screwed again! System won't let me email you! Thanks anyway!

  13. #28
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    Re: 180 degree performance thermostat

    Quote Originally Posted by tzoid
    Oh well, screwed again! System won't let me email you! Thanks anyway!
    TZOID,

    Let's see if I can help. At 1st it seems difficult but as you get the hang of it, it becomes easy.

    1st I assume you have software for "Photoshop" "Picture it" or "Corel".
    Save your picture to "My Documents" in "My Pictures". (With me?)
    Go to your "Photo Shop". It will ask you where your picture is, like your scanner or your computer. Click your computer. This should bring up your saved documents and click on "My Pictures". Click on the picture you want.

    Now we need to reduce the picture to 50KB for the Forum site. One way is to reduce the picture size. Click "Change Page" Click "Crop Page". Crop out all the junk you don't really need. Click done. This is usually still to big. Click "Change Page" again. Click "Change Size". Reduce the picture down around 2x3. Click done.

    Now you should have a pic you can post. Click "SAve As" Give it a name plus a number. This way you tell you old picture from your new one. If your new file is still to big and you have to go back and reduce it more, you give it another number. Nothing worse than going to your pictures and you have several pics that look a like.

    That's the hard part. Now you have to post your pic.
    Start you post dialog. When ready to post scroll down to heading that says "Manage Attachments". Click the 1st "Browse". Your Picture file should come up. Click on the small pic that you saved. Scroll down more to "Submit Reply". That should do it. If your pic was over 50KB the pic won't post. Then your pissed because you have to go back to the PhotoShop and reduce the pic some more. You're sure to screw up at 1st But keep at it. Stuck? Ask another question and I'll try to help.

    See why not many was quick to help? Takes some time. The other guy was talking about another method. It allows you to post more than one pic at a time. Since your only allowed 50KB you store your pics at another web site.
    Since the pic is stored elsewhere and is linked to your post it doesn't eat up your 50KBs.

    You may want to print the instructions. I think it helps you get through it easier. There are some other tricks but this is a good start.

    Hey, We're looking for a pic of that Viper

  14. #29
    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    OK, we'll see how well this old brain can follow your instructions...if I fail, don't think it was the teacher...you did a very thorough job of explaining!!
    Attached Images

  15. #30
    tzoid is offline Cadillac Owners Member
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    Re: 180 degree performance thermostat

    RobertCTS....very good instructions!! Notice how I like black...neighbors think I'm a funeral director. Hope you like the picture.

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