2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

throttle body plates.

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Old Aug 10, 2005 | 09:13 PM
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throttle body plates.

so ive been told how to remove the plates. ive also been told the there are power losses under about 3000rpms. is there a way to get more fuel flow in order to compensate for the extra air flow?
Old Aug 10, 2005 | 09:53 PM
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Your statements don't quite fit together. Are you pulling stuff out of the throttle body or out of the side of the engine? Did you remove the 'choke plates' in the TB? (There are five plates in the TB), you can remove the two outer ones. If you remove any others you will blow the engine up because it will be wide open throttle.
Your computer will compensate for any extra air (to a point) getting in through a smoother TB.
Old Aug 10, 2005 | 09:58 PM
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its a throttle body mod. which is at this site http://fc3spro.com/TECH/HOWTO/TBM/tbm.html
Old Aug 10, 2005 | 10:06 PM
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Gotcha, I don't know if there is anything you can do for that hesitation. Just be glad you don't have a carb on the car, when you open things up for top end power you lose velocity at low RPM's and it hurts fuel delivery. I'm not familiar with how those extra plates function to smooth things out at 3k rpm(racing we never get below 6k rpm) but EFI is best at dealing with little stumbles like that.
Sorry I'm not more help
Old Aug 10, 2005 | 10:45 PM
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If your losing velocity in the intake tract which is causing the slight hesititation I'd imagine itd be easy to increase the velocity by doing some polishing of your pipes or freeing up intake restrictions.
Old Aug 11, 2005 | 04:29 AM
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Originally Posted by duno1818
ive also been told the there are power losses under about 3000rpms.
You've been told wrong.

is there a way to get more fuel flow in order to compensate for the extra air flow?
There is, you need an EFI system that measures the amount of air entering the engine and adds fuel accordingly. Oh wait, you have one...

BTW, there won't be any extra airflow.
Old Aug 11, 2005 | 04:37 AM
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do you have to be such a dick about it?
homeboy was just asking a question...
Old Aug 11, 2005 | 06:03 AM
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Originally Posted by GUITARJUNKIE28
do you have to be such a dick about it?
You're like a stuck record...
Old Aug 11, 2005 | 07:00 AM
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Originally Posted by duno1818
is there a way to get more fuel flow in order to compensate for the extra air flow?
Yes, it's called a stand-alone, and you tweak the throttle transient parameters to smooth out the transition.

Really low end hesitation (under 2kRPM) you can't get it perfect cause it's not that it's too much airflow - it's a sudden loss of air velocity.
When air stalls, there is nothing really you can do about it short of redesigning the whole intake / throttle body design.


-Ted
Old Aug 11, 2005 | 12:40 PM
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Originally Posted by NZConvertible
You're like a stuck record...

do you have an inferiority complex or something? i bet you got picked on so much as a kid that you feel you need to lash out.

let the hate go man!!! start the healing!!
Old Aug 11, 2005 | 12:51 PM
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The only thing the extra throttle plates do, is to help reduce power when the engine is cold- in other words for only the first 5 minutes of running when cold.

There is no HP gain, on a non turbo with stock ports or a stock TB removing the extra plates.

This mod is a waste of time and only for tweakers that want something for nothing on a non turbo.
Old Aug 11, 2005 | 02:21 PM
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it's good for throttle response.
Old Aug 11, 2005 | 07:58 PM
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Originally Posted by Icemark
This mod is a waste of time and only for tweakers that want something for nothing on a non turbo.
Yup. That being said it only took me 20 minutes to yank them out last time I had the UIM off. The longest part was waiting for the JB weld to harden enough to bolt everything back up.

It's one less vacuum hose and actuator and didn't do a damn thing power wise.
Old Aug 11, 2005 | 08:04 PM
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Originally Posted by GUITARJUNKIE28
it's good for throttle response.
I thought it bogs down if you romp it under 3krpm.
Old Aug 11, 2005 | 08:49 PM
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Originally Posted by gingenhagen
I thought it bogs down if you romp it under 3krpm.
It doesn't really bog but stutters a bit. You just have to be smoother on the throttle since the secondary plates won't be there to smooth things out.
Old Aug 12, 2005 | 03:54 AM
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Originally Posted by GUITARJUNKIE28
do you have an inferiority complex or something?
Last time you called me arrogant, now I have an inferiority complex? Which is it? If you're going to break forum rules by regularly flaming and insulting me, at least try to be consistent about it.

it's good for throttle response.
Only on Turbos.

Turbos have damped upstream secondary throttles, but NA's do not. The damper prevents the throttles opening too fast, which improves drivability at the expense of a bit of throttle response. Removing these throttles restores that lost throttle response. On NA's those throttles have no negative effect on throttle response, so removing them does nothing.
Old Aug 12, 2005 | 08:53 AM
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Originally Posted by GUITARJUNKIE28
do you have to be such a dick about it?
homeboy was just asking a question...
carefull there.... no flaming!
Old Aug 12, 2005 | 12:14 PM
  #18  
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and nz, why do you always insist on explaining to me things that i already know?
Old Aug 12, 2005 | 12:26 PM
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Originally Posted by GUITARJUNKIE28
it's good for throttle response.
You don't know dog about series four non turbo throttle plattes.
Old Aug 12, 2005 | 03:32 PM
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mmmmhmmmmm
Old Aug 12, 2005 | 03:57 PM
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I think we're done here...
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