Would it be a good idea to put a throttle body spacer on my 98gtp? I found this one http://www.3800performance.com/Merchant ... ct_Count=1 but was curious as to the actual benefits of this product.

-- Thu Oct 28, 2010 5:04 pm --

bump

No benefit. If you ask why, I will END YOU.

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http://WWW.AZGMPERFORMANCE.COM

^ This guy...

PER ZZP:
replaces the function of our popular coolant plug. This spacer adds slight volume to the upper intake, and prevents the coolant from heating up the throttle body. These things translate into more power with less KR.

ZZP's is only priced at $25 but its only a 1/8" instead of the MAP one being 3/8"

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On a S/C car it really won't do anything since the air is going to be heated up when it is compressed anyway and having a cooler TB would be cancelled out by the hot charge post TB. However, the thermodynamics would make sense with regards to early N/A cars which had the plastic UIM since plastic conducts heat less than metal and if you block off the TB coolant passages, than the only time air comes into contact with metal that metal should be cooler but 04+ N/A motors had aluminum UIM's so a spacer really wouldn't do anything for them. Again, I'm just going by the thermodynamic priciples of why or why not a TB spacer would or wouldn't do anything. Now if you wanted to run nitrous, then yes the spacer would be perfect for an spray connector. If you think about it, air is only in contact with the TB for a millisecond and the amount of heat required for the TB to increase the temperature of the incoming air would be enourmous. An intake would be a better way to spend that much money.

If I'm not mistake, the coolant passages in the TB are to warm it up to a point that it won't freeze up and stick in the winter.

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

^^X2 on the thermodynamic side of it...as far as practicality again i have to agree that your better off spending the money and doing an intake set-up

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04 GP GT1 black spo grilles/spoiler, tinted led tails/third brake light, painted reverse bar, 6k lows/fogs, gxp door rings, STB's/DR brackets, DR door locks, GMPP RTA's, Wizair

I found this link on ZZP's site that tests one with a FLIR (Heat Imaging device) on a S/C 3800.

http://www.zzperformance.com/downloads/ ... _Study.pdf

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^^^how can it be an N/A 3800 if they are talking about dropping the supercharger temp??

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04 GP GT1 black spo grilles/spoiler, tinted led tails/third brake light, painted reverse bar, 6k lows/fogs, gxp door rings, STB's/DR brackets, DR door locks, GMPP RTA's, Wizair

Yeah the TB may be cooler but the equations and key information that they left out are the fluid dynamic flow equations which would show that even though the TB is cooler the flowing air isn't effected unless the outside heat was huge!! Not trying to cut you down brian, just trying to justify me paying $50k a year for my engineering degree
If you take a cross section of a round volume or air, only the outer circumfrence of that air is actually even in contact with the walls of the TB and at that they are only touching it for roughly .0001 second at WOT since air flowing through the TB at WOT is traveling a couple hundred MPH (somewhere between 250-500 mph depending on cars) if I'm not mistaken. To simplify things, let say that the air was only travelling at 1 m/s roughly 2.25 mph, sorry to switch up units...(1m/s/1000mm/s)(150mm/6inches)(1/60seconds) = .0025 so that particular section of air would be in contact with the TB, if it was 6 inches long, for only .0025 seconds. If I wasn't lazy I would go figure out how much engergy in heat it would require to raise that section of air by say 25 degrees, but I can promise you that it would be an enourmous amount and way more than 69 degrees especially when the air is going to come into contact with the UIM or S/C and then heads which are all going to be in contact with the air for a long amount of time than the TB and the S/C will heat the air up due to compression anyway.
Now if the TB has a huge surface area of something like an IC than yeah, that much of a temp difference would make a huge difference even if the air was only in contact with it for a .0001 second, but the TB's surface area really isn't that big in comparision to the rest of the engine that the air is in contact with before entering the combustion chamber.

Class is over.

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

I had something else going on while I was typing, that was just a typo. I'll fix that.

Thanks for the info Matt, I'm just here to learn and teach when I can. You definately cleared that up for me though!

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These tend to have their gaskets leak eventually and pour fluid into your SC and through your engine and out your tail pipe.

god i am so glad im not the only engineering geek on this site!!!!

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04 GP GT1 black spo grilles/spoiler, tinted led tails/third brake light, painted reverse bar, 6k lows/fogs, gxp door rings, STB's/DR brackets, DR door locks, GMPP RTA's, Wizair

I started out to be. My major at LSU was Mechanical Engineering. I really wanted Aerospace Engineering but they didn't offer it. I decided that it wasn't for me when all the science that I loved turned into math that I could do, but hated. I didn't want to be miserable for the rest of my life, so I moved on.

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3.5" MPS, 1.84 Rockers, 3" DP, Frt PEM, 39lb Injs., PowrTuner, Wizair
14.07@ 98.85mph 2.180 60'

Thanks guys saves me money.

Matt has already covered everything, but I'll add this.

The only reason to run a TB spacer is it it has been tapped and your nitrous or water/meth nozzle is in it.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6