TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

Which one are you running?

 

Me too. Change it every oil change.

 

As I understand it's more important for a forced induction engine as the result of pressure. Not to say it wouldn't benifit a n/a motor. Keeps unnecessary gunk out of the engine.

 

You only have to pull the supercharger once to form a strong opinion on the catch can addition. There is a surprising large amount of oil buildup in the neck of supercharger body all the way down to the intercooler. I’m a firm plus one on the addition of catch cans.

Got mine from these guys: http://www.bobsautosports.com/#2907

 

I modified a cheapy Amazon special.

 

Just make sure its sealed up well. Vacuum leaks suck

 

Thanks fellas! Looks like that is going to move closer to the top of my list.. figured it would be a good addition to keep things cleaner

 

I've got the cheap chinese $30 can from Amazon with the hoses that smell like a bag of . The can is actually decent quality for the price.

 

Yeah, if you go that route get some good fuel line or equivalent tubing.

 

First thing I did was replace the hoses.

 

That would probably be a question best asked in a separate thread. I choose not to give my opinion on catch cans.

 

I got a catch can from agpturbo. Loved it on my srt4. So I got the one for the evo I think. It was $100 and the hoses were a tight fit but worked great.

 

yes it does. pretty sure thats exactly what took out my engine back in 2013

 

At what point in throttle position or boost will the fpr mod show results? My meth gauge displays injector pulse width in percentage. Might that number change? Or would I be delivering more fuel at the same reading? Do I assume I could only run richer with this?

 

Lets take a look at this intriguing question @White lightning boosted, shall we?

Stock fp = 43.5psi
Fpr mod lowers fuel pressure below 43.5psi when engine is in vacuum
Fpr mod raises fp above 43.5psi when in boost.

Fuel injectors are either ON or OFF!
There is no halfway...afr is reached by increasing or decreasing the time each injector is open.

The above is a known factor with fpr mod so now the only variable is when transitioning from closed loop to open loop.
We know the TRD tune is inherently rich (for stock pulley and engine requirements) but has no choice but to lean out depending on mods (extra fuel requirement) because the ecu is no longer controlling the afr but is going off of a fixed table.

So armed with all of this new information what do you think a graph would look like between no fpr mod and with fpr mod?

P. S. Sorry, I guess I'm in teaching mode tonight

 

My algebra skills are right down there with dunking a basketball and women. I think the afr would be the same. The two on a graph should make a slight x. Intersection point at vacuum to boost location.

 

Very good!
That's is exactly how I would hypothesize the graph. The angle of the "X" would be dependent on the fuel pressure change

Afr's would stay the same in closed loop because the ecu would command the injectors to stay open longer to compensate for the lower fp.
That does not apply to open loop.

 

You are an amazing teacher if you can explain that in a way I understand!

 

Just one of many around here! Happy to spread the knowledge!