TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

"They" keep stalking us......

 

Did you upgrade the springs as well?

 

No, the valves are OEM Lexus valves from the LC500 and the springs are the same as the OEM Lexus springs so there was no need to change the springs. The lighter valves will prevent valve float and valve bounce at higher RPMs. At normal RPMs I could have used softer springs but the whole purpose was to be effective at higher RPMs. The red line on the Lexus LC 500 is 7300 which has a large safety factor built in which is why I think I can safely raise it higher. I don't have a small scale so I weighed them in Wichita Falls last year while @Roostfactor was making my JFR y pipe. The scale in the pictures is Roost's scale.



Edit: I have to thank @Jowett for letting me know about the Lexus titanium valves being compatible with the 3.5 engines. I paid only $463 from a Lexus dealer for all 24 valves which would have cost around $5000 to have them custom made.

 

Check out the 2UR GSE cam followers, too. They have a hole/oil jet that sprays the roller directly.

 

So what's the going rate for a used ucon, no gears? Asking for a friend

 

Just for the record, superchargers are not designed to spin to the moon, this statement applies to roots and may very well apply to TVS blowers as well. Without taking a look at the compressor map and knowing the pulley specs top and bottom as well as RPM limits of the engine I couldn't give you an accurate picture of what to expect. While the lighter rotating mass will be helpful in faster revving, it also will do you no help if you are spinning that thing out of its efficiency range. This becomes more pronounced as you up the boost and increase the rev range.

Also, Titanium valves are capable of increasing your rev limit to a lot higher than the factory limiter. That being said there are other limitations which may not allow for spinning it higher, but that is outside my realm as I'm not familiar with 2GRs.

 

I have one for sale in the classifieds area.

 

You need one?

 

Cheap since HP Tuners is way better

 

Thanks, I will go back and do another search. Just trying to see where pricing is now.

No, going to post mine for sale in a week or two.

Yep. Would be nice if the sale will cover the cost for HPT.

 

Sorry, more hunting and I found this thread you guys were already running... All the answers to all the questions

https://www.tacomaworld.com/threads/methanol-4-0.554164/

 

Did anyone ever get a quality install guide?

So you have to get the O2 sims and extensions with the SPECU LT’s?

you get a response?

 

I never sent a note to URD since I just used what came in the box with mine. Should send a note to gadget.

you need extensions for the front o2 sensors to plug into the headers yes. Sims aren’t necessary with HP Tuner capability, but not sure if the headers will give MIL with just being installed.

 

You do need extensions and o2 sims to run these headers.

 

Thanks gents. Now I’m wondering if I made a good choice in headers. Between complaints of catless smell and bumming out O2 sensors, I’m only going to be cussing the upgrade.

 

I've been happy with the URD headers so far. Feel it pulling stronger throughout, especially in the top half . No fouled O2s but you're gonna want a cat in there somewhere. I put one right past the flex coupler, in the cat-back section.

 

On the topic of the long tubes. I’m still looking for a set. If anyone has some laying around that they’re not going to use. Would prefer the early (no air injection) type.

 

got a couple of photos you’d be willing to share?

 

Just the extensions needed to use the furthest bungs on the headers and possibly Hptuners is needed. Using mine with no problems but still have the stock y-pipe with secondary cats.

 

I’ve been made to understand that to get the best outta our trucks, headers or not, hp is a must.