Throttle Body

Ok I have a 63mm Magna throttle body that I am planning to put on my GSR, 4G93. It is ALMOST straight forward to change over once the inlet manifold has been made bigger. (a few hours with the die grinder fixed this problem) Of the two vacuum lines that connect at the top labled "P" (red hose) and the "A" (yellow hose) the Magna throttle body only has a connection for the "P". My question is what do you reckon is the best way to connect up the pipes so that it will work properly, the pipes go to some crap to do with the charcoal canister thingy. Can I just block off the "A" hose or should I "T" piece it into the other line? Using compressed air I found that it connects in through the original throttle body about 1cm before the butterfly valve. Any thoughts/suggestions???

You can disconnect the charcoal canister completely with no side effects. So that may be an option. It's merely an emissions thing.

Have you had a look at the throttle cable set up,

bit different

For single solenoid setup:
The P will go to the upper feed on the purge control solenoid valve and the bottom of the valve will go to the charcoal canister.
The A in your case, referring to the bottom twin solenoid setup, will just recirculate within the throttle body so you can just block that one off on your setup.

For twin solenoid setup:
Left solenoid upper connection goes to E on the throttle body
Left solenoid lower connection goes to A on the throttle body
Right solenoid upper connection goes to P on the throttle body
Right solenoid lower goes to the charcoal canister located under the brake booster.

Here is a picture, might make a little more sence what I'm on about!

Yeah like I said above ^^^^^^ Block your yellow line off (originally A)and only run the P from the throttle body to the solenoid, then from the solenoid to the canister

Thanks EVO-00X that is what I will do, will it still work or not? like does that valve open if it is bloked off or would it be better just left open to the atmosphere?

The setup for all the other 4G93's/4G92 for Proton and Mitsu utilise the twin solenoid valve setup. Aus spec GSR's only have one and its for the purge control. Have a look at this diagram below of how the twins are set up. You dont have the 2nd solenoid which on theirs runs from A to the 2nd solenoid, then to the EGR then back to the throttle body:

So what is the yellow/"A" line doining at the moment then?
And should I block it off or leave it open?

Richard said:

So what is the yellow/"A" line doining at the moment then?
And should I block it off or leave it open?

Click to expand...

"Definition: The EGR valve is the main emissions control component in the exhaust gas recirculation system. The valve is located on the intake manifold, and opens a small passageway between the exhaust and intake manifold to allow a metered amount of exhaust to flow back into the engine. This reduces combustion temperatures and helps control the formation of oxides of nitrogen. The EGR valve is opened by the application of vacuum to its control diaphragm. Some also require a certain amount of exhaust back pressure before they'll open. On newer vehicles, the valve is electronic and uses one or more solenoids or a small stepper motor. The valve should remain closed while the engine is cold and at idle. It should only open once the engine has warmed up and is running at part-throttle. If the valve sticks shut (or is disconnected), NOX emissions will soar and detonation will often result (See Detonation and Spark Knock). If it sticks in the open position or fails to close all the way, it acts like a vacuum leak resulting in a rough idle, hesitation and possible stalling. "

From that defination, i would say it flows from the EGR to the Manifold, therefore i would proberly leave it disconnected/connected to nothing? If its blocked, wheres the air suppose to go? Just a rough guess...?

Can someone else with a GSR/EVO please confirm where their yellow 'A' line goes to after it leaves the charcoal canister?

People have been known to ditch the EGR valve and use an EGR block off plate instead. This is supposed to reduce intake temperatures and to remove carbon build up in the intake manifold... a little bit different info to that mentioned above.

EGR block off plate is the key for the magna throttle body upgrade on the gsr for the record Meek Auto ( WWW.MEEK.COM.AU )has had the erg block off plates made, and in stock and they are relatively cheap and fit perfectly and its very hard to tell that they are there :wink:

Yeah mine could be hooked up wrong at the moment, I remember the boost guage used to be hooked up down there somwhere when I first got the car, there was pipes, "T" pieces and cable ties everywhere! I thought I had hooked it up correctly when I shifted the boost guage feed to a "T" piece from the FPR. As for EGR block off plate, Meek in Sydney me in Melbourne so postage... all ads up I can probly make some thing up, but as described by Lefty, it does have its benefits and one of my Tafe teachers explained it all and it makes sence - unless he is a biased greenie or somthing!

hheheh i just googled

Richard said:

As for EGR block off plate, Meek in Sydney me in Melbourne so postage... all ads up !

Click to expand...

what you cant afford a postage stamp :shock: for the time it will take you to actally make one it would have paid for itself 10 times over just buying it from MEEK :wink: