I've heard from a few different people that fcs (s5 specifically) have more than one throttle plate that comes into action once the RPMs are high enough and that there was a mod you could do to remove them to make trottle response better? Anyone know?

 

Here's some more in-depth info on the throttle body mod: http://www.fc3spro.com/TECH/HOWTO/TBM/tbm.html
The system smooths out throttle inputs but can add high end HP if removed.

 

Thanks man that's a good writeup. Have you done it yourself?
I didn't like the sound of the bogging below 3000 though

 

It won't add any power at all. The TB is not a restriction. The only reason to do it is to clean up the engine bay a little.

 

oh ok. by the sound of that writeup it said it would increase top end HP

dont know if im down to reset my TPS

do alot of people do this mod?

 

this seems like a lot of work to maybe get a little more top end while considerably lowering the day to day driving performance, kinda seems like a waste of time to me.

 

The throttle body mod is nearly pointless on an NA and there is too much probability of something going wrong. So unless you have a specific reason to perform it, just leave the throttle body alone.

 

The theory behind the throttle body mod is correct in that it removes a restriction to the airflow. Whether it is significant enough or not, is debateable. Maybe in extreme turbocharged applications. However, I would listen to RotaryRocket88's experience over my theories any day. The removal of the coolant lines make the engine bay cleaner and easier to work on and may eliminate leaks, if that's an issue. And if you're in there anyway, you may as well do it if you don't mind the bog a low rpm. But the bogging would be suddenly opening the throttle under 3k rpm. Like deciding to drag race the guy next to you halfway through a normal start.

As for the TPS reset, I would highly suggest it. A properly set TPS will help will make light throttle cruising smoother. Most do it to fix some sort of starting/idling/bucking problem. My dad almost sold his RX7 after owning it for 23 years because of an improperly set TPS and an incompetant Mazda dealer. It's worth it.

 

The OP's car is an NA, so the tertiary throttle plates work in an entirely different way then a TII. They are held WIDE OPEN after the engine has warmed up. Unless they are malfunctioning and sticking somewhat closed, then hesitations on throttle transitions won't happen. Also, there won't be any benefit to removing them either.

Removal of the coolant lines will defeat the cold start cam and thermowax assembly, making cold starts a bit of a pain. Might not be an issue in California, but I wouldn't know. Still, it seems silly to remove these things for some perceived added benefit when it also creates several drawbacks at the same time.

 

cool thanks guys. my opinions with aaron. i still street drive my car so i dont wanna deal w the boggin and the complicated process

my tps is in perfect adjustment and so is the cold start so im better off leaving thats stuff alone.

maybe if i decide to go turbo

 

sounds like you maybe getting confused with the 5/6 port actuators that open at a certain RPM and keep better higher end power.

 

no ive heard about this from a few different fc guys but im hearing that it doesnt increase power at all so i doubt im gonna go through the entire install.

 

I`ve done that a couple of times for costumers with small budget, trying to get some thousands ahead on bracket drag racing. It does get you some small HP, so if that´s what you are looking for, go ahead. I recomend you get a used TBody and save yours in the shelf so if you dont like it, you simply return to the original. It must be cheap to get a used one.
Pineapple racing sell a set of inserts for the auxiliary ports that also can benefit you and you can also get somewhere an adaptor to change your air filter to a cone style.
When you try to get some performance you can get it bit by bit with some of these and others small changes.

 

thats actually a good idea. having another throttle body would be a good thing to have incase anything whent wrong w the install or the results werent positive

id like to hear more about the inserts you were talkin about and the intake adaptor

 

The inserts, you can find them at www.pineappleracing.com
The adaptor, I think most of the performance stores can sell it. Try where they sell those kind of filters. I made my own in just a couple of hours.
At mazdatrix.com you can get some Magnecor spark plug wires that can help
Good luck with that

 

NGK spark plug wires arent bad at all