throttle body spacer worth it?
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, throttle body spacer worth it? in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; I was seeing if any body here has actually used a spacer. An noticed any thing is it even worth ...
  1. #1
    ctsboiha's Avatar
    ctsboiha is offline Cadillac Owners Fanatic
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    throttle body spacer worth it?

    I was seeing if any body here has actually used a spacer. An noticed any thing is it even worth anything?

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    mmvvt is offline Cadillac Owners Fanatic
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    Re: throttle body spacer worth it?

    If it's a good price then maybe... and you should only do it in conjunction with a CAI. I didn't see/feel any difference in acceleration or mpg.
    Also be aware that some brands of spacers might make a 'whistling' noise, which is a hate it or love it type of thing.

    I would spend that money on a low temp thermostat instead or save for a Volant intake if you don't already have it.

    ImageUploadedByAutoguide1357880347.428227.jpg

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    mmvvt is offline Cadillac Owners Fanatic
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    Re: throttle body spacer worth it?

    ^ double post ^

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    ctsboiha's Avatar
    ctsboiha is offline Cadillac Owners Fanatic
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    Quote Originally Posted by mmvvt View Post
    If it's a good price then maybe... and you should only do it in conjunction with a CAI. I didn't see/feel any difference in acceleration or mpg.
    Also be aware that some brands of spacers might make a 'whistling' noise, which is a hate it or love it type of thing.

    I would spend that money on a low temp thermostat instead or save for a Volant intake if you don't already have it.

    <img src="http://www.cadillacforums.com/forums/attachment.php?attachmentid=106663"/>
    What is the benefits of a low temp thermostat?

  6. #5
    CTSM is offline Cadillac Owners Enthusiast
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    Re: throttle body spacer worth it?

    For non-track racing applications I can't think of any benefits of whatsoever, on the contrary increased engine wear is the main side-effect of a low-temp thermostat.

  7. #6
    Jim's 06 is offline Cadillac Owners Fanatic
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    Re: throttle body spacer worth it?

    A low temp thermostat fools the engine's computer into running richer (as if the "choke" were on), thereby providing marginally more gas to the engine (without the downside of a choke plate restriction), and thus more power. It also adversely affects gas mileage and pollution. I first noticed this phenomenon when my new '89 Bonneville 3.8 v-6 seemed to run faster and smoother when cold. And then I noticed the Corvette aftermarket was selling low temp thermostats for unspecified reasons, but obviously for more performance. So I installed a 180 deg. thermostat (205 deg. is std.) and it worked! But, of course, it was running around in "open loop" mode all the time. Given the location and labor involved in changing out the CTS' thermostat, it's probably not worth the effort.

    I have an '84 Avanti with the '84 Camaro 305 210hp engine; Avantis have always been prone to overheating, so one thing I did was go down from a 205 deg t-stat to a 195, with no ill effects.

    In the olden days ('50s-'60s) engines routinely used 160-180 deg. thermostats with no ill effects.


    PS- I share mmvvt's cynicism about throttle body spacers. These things have been around (in various forms) since at least the first gas crunch in '73. I've been on the lookout for anything that really works since then, and still am. You might get a little more midrange torque out of it (due to slightly longer intake runner length), and it looks easy enough to install, but don't expect blazing performance and much better mileage (otherwise known as the "J.C. Whitney Effect"). Cadillac is not about to leave that kind of power untapped for so little effort.

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    ctsboiha's Avatar
    ctsboiha is offline Cadillac Owners Fanatic
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    Quote Originally Posted by Jim's 06 View Post
    A low temp thermostat fools the engine's computer into running richer (as if the "choke" were on), thereby providing marginally more gas to the engine (without the downside of a choke plate restriction), and thus more power. It also adversely affects gas mileage and pollution. I first noticed this phenomenon when my new '89 Bonneville 3.8 v-6 seemed to run faster and smoother when cold. And then I noticed the Corvette aftermarket was selling low temp thermostats for unspecified reasons, but obviously for more performance. So I installed a 180 deg. thermostat (205 deg. is std.) and it worked! But, of course, it was running around in "open loop" mode all the time. Given the location and labor involved in changing out the CTS' thermostat, it's probably not worth the effort.

    I have an '84 Avanti with the '84 Camaro 305 210hp engine; Avantis have always been prone to overheating, so one thing I did was go down from a 205 deg t-stat to a 195, with no ill effects.

    In the olden days ('50s-'60s) engines routinely used 160-180 deg. thermostats with no ill effects.

    PS- I share mmvvt's cynicism about throttle body spacers. These things have been around (in various forms) since at least the first gas crunch in '73. I've been on the lookout for anything that really works since then, and still am. You might get a little more midrange torque out of it (due to slightly longer intake runner length), and it looks easy enough to install, but don't expect blazing performance and much better mileage (otherwise known as the "J.C. Whitney Effect"). Cadillac is not about to leave that kind of power untapped for so little effort.
    Ya I replaced my thermostat a couple months back an it was such a bitch! Ill just get a cai!

  9. #8
    figgie is offline Cadillac Owners Fanatic
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    Re: throttle body spacer worth it?

    Quote Originally Posted by Jim's 06 View Post
    A low temp thermostat fools the engine's computer into running richer (as if the "choke" were on), thereby providing marginally more gas to the engine (without the downside of a choke plate restriction), and thus more power. It also adversely affects gas mileage and pollution. I first noticed this phenomenon when my new '89 Bonneville 3.8 v-6 seemed to run faster and smoother when cold. And then I noticed the Corvette aftermarket was selling low temp thermostats for unspecified reasons, but obviously for more performance. So I installed a 180 deg. thermostat (205 deg. is std.) and it worked! But, of course, it was running around in "open loop" mode all the time. Given the location and labor involved in changing out the CTS' thermostat, it's probably not worth the effort.

    I have an '84 Avanti with the '84 Camaro 305 210hp engine; Avantis have always been prone to overheating, so one thing I did was go down from a 205 deg t-stat to a 195, with no ill effects.

    In the olden days ('50s-'60s) engines routinely used 160-180 deg. thermostats with no ill effects.


    PS- I share mmvvt's cynicism about throttle body spacers. These things have been around (in various forms) since at least the first gas crunch in '73. I've been on the lookout for anything that really works since then, and still am. You might get a little more midrange torque out of it (due to slightly longer intake runner length), and it looks easy enough to install, but don't expect blazing performance and much better mileage (otherwise known as the "J.C. Whitney Effect"). Cadillac is not about to leave that kind of power untapped for so little effort.
    A low temp t-stat with an OEM EMS makes the computer stay in open loop instead of closed loop due to never reaching the programmed "operating temperature". More gas does NOT equate to more power without MORE air. All it does is run rich on (Lambda < 1) with more carbon build up but you will not get more power. If anything, OEM programs WOT to be richer than it really needs to be to prevent detonation or a lean condition from taking place. Since the EMS never gets to closed loop, timing also is pulled back.

    The only reason to go low temp t-stat is

    The EMS is PROGRAMMED to operate correctly in the lower temperature region (talking specifically programmed, ignition timing, fueling, timing of fuel injection etc)

    otherwise there is ZERO benefits from a lower temp t-stat.

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