PT Cruiser Forum  
Advertisements
       

Go Back   PT Cruiser Forum > General Forums > Tech & Performance Forum

PT Cruiser Forum

Advertisements
Throttle body spacer

 
Like Tree3Likes
  • 2 Post By NitroPT
  • 1 Post By UptownSport

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 26 Oct 2012, 04:28 pm
Young Cruiser
 
Join Date: Oct 2012
Location: San Diego
Posts: 97
Default Throttle body spacer

I see several of the accessory sites have them and claim all kinds of performance increases.

Snake oil or has anyone actually seen a difference n low end torque?
Reply With Quote
  #2 (permalink)  
Old 26 Oct 2012, 04:53 pm
Banned
 
Join Date: May 2011
Location: Dallas Texas
Posts: 3,722
Default Re: Throttle body spacer

Throttle Body Spacer?
Reply With Quote
  #3 (permalink)  
Old 26 Oct 2012, 05:07 pm
NitroPT's Avatar
Obsessed Cruiser
 
Join Date: Jun 2012
Location: USA kalyfornia
Posts: 15,601
Default Re: Throttle body spacer

I don't use them.....
__________________
Dalai Lama
"Share you knowledge. It's the best way to achieve immortality."
ASE MASTER TECHNICIAN
Reply With Quote
  #4 (permalink)  
Old 26 Oct 2012, 05:07 pm
Fanatic Cruiser
 
Join Date: Sep 2012
Location: Carson City NV
Posts: 675
Default Re: Throttle body spacer

Is that thread a sticky? It does seem like it would be a prime newbie question.

I liked Crewzings, buy one and pick a side answer!
Reply With Quote
  #5 (permalink)  
Old 26 Oct 2012, 08:19 pm
Obsessed Cruiser
 
Join Date: Nov 2007
Location: Mooresville, NC
Posts: 5,324
Default Re: Throttle body spacer

I found a site that has a BOGO sale on TB spacers, but dayum I can't remember the link....lmao....
Reply With Quote
  #6 (permalink)  
Old 26 Oct 2012, 09:48 pm
soonercruiser's Avatar
Obsessed Cruiser
 
Join Date: Jun 2007
Location: Oklahoma City
Posts: 7,382
Thumbs down Re: Throttle body spacer

SNAKE OIL!
Do you use any snake oil?
__________________
Frank, aka SOONERCRUISER,

2011 GWE Dodge Challenger SRT8 as Show Car
2003 PT Cruiser GT Panel Van Conversion as new day driver.

Have now owned 6 PT Cruisers = Me PT Crazy!
Reply With Quote
  #7 (permalink)  
Old 27 Oct 2012, 12:45 am
NitroPT's Avatar
Obsessed Cruiser
 
Join Date: Jun 2012
Location: USA kalyfornia
Posts: 15,601
Default Re: Throttle body spacer

Quote:
Originally Posted by soonercruiser View Post
SNAKE OIL!
Do you use any snake oil?
yes it works great on foot fungus, hair loss, bad breath, and carbon buildup on the tail pipe.
__________________
Dalai Lama
"Share you knowledge. It's the best way to achieve immortality."
ASE MASTER TECHNICIAN
Reply With Quote
  #8 (permalink)  
Old 27 Oct 2012, 01:55 pm
UptownSport's Avatar
Veteran Cruiser
 
Join Date: Jan 2011
Location: 55403
Posts: 3,912
Default Re: Throttle body spacer

Quote:
Originally Posted by NitroPT View Post
yes it works great on foot fungus, hair loss, bad breath, and carbon buildup on the tail pipe.
Ok, place an order for three for me
Reply With Quote
  #9 (permalink)  
Old 28 Oct 2012, 03:48 pm
Young Cruiser
 
Join Date: Oct 2012
Location: San Diego
Posts: 97
Default Re: Throttle body spacer

On Nissan forums there are a lot of folks who swear by spacers. Not because they "swirl" the air, but because they do not conduct heat so the throttle body stays cooler. Still seemed bogus to me, if it increased performance much the mfg'er would do it at the factory level.
Reply With Quote
  #10 (permalink)  
Old 28 Oct 2012, 04:41 pm
UptownSport's Avatar
Veteran Cruiser
 
Join Date: Jan 2011
Location: 55403
Posts: 3,912
Default Re: Throttle body spacer

N/A manifold is plastic, I'd say no heat would be conducted, and even if so the TB doesn't have a float bowl ...
and TB length is so short it couldn't possibly heat intake charge significantly ...

PT's plenum was chosen because it's a (rather) small engine to move a big, possibly overladen, vehicle. We'll talk about factory options for same engines in a compact in a bit.

Linked explainations make sense theoretically to some extent;
First, one for a carb (Dominator, AFB etc.) would massively increase plenum area, AND smooth any turbulence. a V-8 had next to no plenum, more at: a 'junction' area- You can see an factory race one here (google) with a larger plenum still isn't as large as the stock PT:


You could see how much volume a spacer would add:


Plus, PT doesn't have bends;


So you could see a 2.125" spacer an inch long wouldn't add much volume.


Next, look at other factory manifolds for the PT engine;
the 2.0 DOHC has a very large plenum;
(this is only ~ 3/4 of it)


And you could buy plenum spacers at one time for that 2.0 manifold; massive increase in area:


Here's the dyno, not too much even if you do believe it:




A swirl is absolutely stupid- You want the charge to be absolutely smooth in plenum- It needs to be coaxed into individual runners-
air moving at any velocity won't want to flow where you want it!!!!
Plus, does anyone believe after passing thru plenum, entering runner, traveling twenty some inches, going past intake valve there'd be any swirl remnants????

In short spacer volume is insignificant and swirl (if it actually would add swirl) is silly if not detrimental.

If you're still not convinced, I'd be glad to make one if you want to send chunk of Alumium




Quote:
Originally Posted by Dino View Post
Throttle body spacers are aftermarket devices that purport to increase horsepower in a variety of ways. The efficacy of this modification depends largely on the engine it is applied to and the engine's factory shortcomings.
Placement

TB Spacers are designed to be placed between the throttle body (the large butterfly valve that controls airflow into an engine) and the intake plenum onto which it is bolted.
Marketing

According to manufacturers, TB Spacers make power through better fuel atomization, which is accomplished by creating a "tornado-like" swirl in the intake manifold.
The Tornado Effect

Air-swirl effects tend to benefit engines with throttle-body injection more than those with multiport injection, since multiport systems use a dry intake manifold that does not contain any fuel droplets to atomize.
Plenum Effects


Throttle Body spacers make the majority of their power by increasing the volume of space between the throttle body and intake runners. This gives the engine more unhindered air to tap under high-demand situations.
Cost and Consequence

Throttle body spacers are worth a few horsepower on some older cars, and those newer multiport systems that came from the factory with an under-sized plenum. Bear in mind, though, that a $250 billet-aluminum spacer probably isn't going to make much if any more power than a $35 plastic one.



Answer



Throttle body spacers are a prime example of modifications that work quite well on some cars and not at all on others. The efficacy of this simple mod depends largely upon the engine, and the extent to which it has been otherwise altered.
Location

TB Spacers fit in between the throttle body (main air valve of the engine) and the intake manifold plenum (the large space behind it).
Theory

Along with throttle body flow, an intake manifold's plenum size determines the reserve of air that an engine can call upon when required. A large plenum is crucial to making top-end horsepower.
Function

By moving the throttle body a little further out, a spacer can increase plenum size by as much as 20 percent on some cars.
Effectiveness

On unmodified, fuel-injected engines with sufficient plenum volume, many customers report that TB spacers make little to no difference in power.
Modified Applications

On engines internally modified for increased airflow (camshafts, larger valves, ported cylinder heads), throttle body spacers can make a crucial difference in power production.

Answer

Throttle body spacers are a prime example of modifications that work quite well on some cars and not at all on others. The efficacy of this simple mod depends largely upon the engine, and the extent to which it has been otherwise altered.
Location

TB Spacers fit in between the throttle body (main air valve of the engine) and the intake manifold plenum (the large space behind it).
Theory

Along with throttle body flow, an intake manifold's plenum size determines the reserve of air that an engine can call upon when required. A large plenum is crucial to making top-end horsepower.
Function

By moving the throttle body a little further out, a spacer can increase plenum size by as much as 20 percent on some cars.
Effectiveness

On unmodified, fuel-injected engines with sufficient plenum volume, many customers report that TB spacers make little to no difference in power.
Modified Applications

On engines internally modified for increased airflow (camshafts, larger valves, ported cylinder heads), throttle body spacers can make a crucial difference in power production.
Chromenut likes this.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Throttle Body Spacer? Dino Tech & Performance Forum 12 14 Aug 2010 12:05 pm
Throttle body Spacer partyd Tech & Performance Forum 6 24 Apr 2008 03:59 pm
Throttle body spacer? 1lowufo Tech & Performance Forum 5 23 Mar 2005 09:50 pm
Throttle Body Spacer PT-ERA Tech & Performance Forum 19 06 Jan 2004 03:06 pm
Throttle Body Spacer CHRUZIN Tech & Performance Forum 7 19 Nov 2002 11:53 pm


All times are GMT -5. The time now is 03:38 pm.




Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors