TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

agreed. we literaly hung the truck from a forklift to max droop and stuff, still had more room. i appreciate the headsup. saving now for the front, ugh.

 

You should just go for a Dana 60 like us.

 

when its paid for. til' then a truetrac and kings are plenty.

 

Hahahah yeah. Mine's paid for, but fuck am I tired after working almost every day for the last 5 months or so.

 

agreed. i have years of payments left.

 

Lol! Best holiday ever!

 

I didnt want to rev it that high.

 

Hey all. Just having a think here. If my issue of loosing boost at 3k rpm is not an ecu or electronic issue, has anyone got any suggestions what it could be?
I have changed the bypass valve.
When I remove the vacuum line from the bypass valve I have boost to red line.

What the hell would be causing the vacuum to open the bypass when stillnunder heavy throddle?

 

The source of that vacuum hose maybe?

Although you still have an ECU issue that should be flashed to a manual format.

Got some pictures of where the vacuum hose to the bypass valve is connected?

 

my guess is a fault in the vacuum line, where its coming from as @Torspd said , or the ecu controlling how the vacuum happens.

 

Follow the vacuum hose from the bypass valve. Where does it connect to on the other end?

 

What is the part number on the side of it? Been looking around for one locally and want to make sure I get the correct one.

 

I’d go look at mine but the truck is at home. Found this old pic on my phone and zoomed it in. Looks like:
FAUR 10832H
C9313M

 

Thanks!

 

Figured i'd leave this here in case there was someone with an XR that might be interested

https://www.tacomaworld.com/threads/facebook-gb-for-trd-replica-spoiler.622996/

Yes, i am getting one for my 4wd

 

The Ute is at the dyno place so can’t get a photo atm.

 

It’s just a short line and it connects to a port at the back of the charger.

 

Yeah I would agree. I can only be something with the vacuum. Weather is mechanical or ecu related, it has to be the vacuum

this is not my actual sc but it’s the same one. This is exactly how my vacuum line is connected

 

Because it works when disconnected, in my mind it comes down to one of the following:
1) the line has a crack in it. When you reach enough boost pressure the line opens up and the valve forces open.
2) the line is loose and needs hose clamps at each end. Enough boost and the line leaks.
3) The diaphragm has a leak and doesn't operate to close under boost.

Here's a cool video that discusses the operation.

https://www.youtube.com/watch?v=EqzvG4djxAc

 

This part will mind boggle you...
1- we have put on a new vacuum line
2- we also have hose clamps each end
3- it’s a brand new bypass valve and it was checked before install.

Such a pain in the arse. The dyno guy was saying he might take off the sc and have an internal look just to eliminate any possibilities inside it.