TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

I think a rolling start at 60 is a better reference point and allows you stay within more lawful speeds.

I don't know as far as reference goes currently, but I absolutely blew the doors off a modded 370z and every vehicle in the general area earlier on the freeway.

Scary fast now.

 

I have thought about reverting to my 2.5 just for the decreased heat/increased efficiency.
We know we are at or beyond the efficiency limits of out sc without artificial cooling.

I plan on running water/meth (have on hand waiting install) but I have had a feeling the 2.5 is max reliable boost for all needs like towing, etc without over heating the charge air or requiring further artificial cooling.

I've been running the 2.3 for awhile now and of course it is more responsive but without artificial cooling I think MAY be too much.

For me reliability is key and I would be hesitant pulling a load over long distances/terrain with the 2.3.
2.5 is much more proven to be stable with our setup FWIW.

Roost

 

I may just toss on my 2.5 and call it good if I can determine that it is indeed not past the superchargers efficiency range and of course once this fueling debacle gets dealt with.

I am going to refer to the map when I get a chance and report my findings of RPM range unless you get a chance to take a look at it first.

 

Im looking forward to your results on the innercooler temp differences with water/meth and 2.3 pulley.

You got an actual equal length exhaust pulse and it’s open with no cats. I think that’s a huge benefit for heat reduction compared to stock manifolds and stock ypipe.

 

When all the guys went smaller after everyone got their quickchange setups, I stayed at 2.7. To me this is perfect. Plenty of power right when I want/need it, no belt issues (stock size with rooosty’s special pulley), no other potential problems to arise. I want to say I heard 2.6 can be the happy medium but for me 2.7 is where it’s at.....

 

Yeah, I definitely gotta start playing with pulley sizes again once this is all taken care of. What I do know for sure is that I have good solid usable power off the line now and throughout the RPM band, but I know that is because of all the supporting mods. Like without them this pulley would be a "meh" sort of mod.

 

Yeah, that’s something I should have added.....2.7 is great with all my supporting mods done. Tune, Full exhaust etc. I’d love to get the cam gears done.

 

Judt got a good word back from Justin. It indeed WAS the pulley causing my issues.

Not necessarily bad news. Now I or someone needs to take a good look at the blower map and determine what the sweet spot of efficiency is on it so I can run the properly sized pulley and get the most out of this thing safely and tunably.

 

LoL! How many different times have you said your truck is running better than ever this past month?

I know you’re in Cali. But your stock manifolds plus cats and stock ypipe and additional cats are killing you with the 2.3 pulley. Your exhaust system is closed up! And a different muffler doesn’t open up an exhaust system. It just changes the sound. All these hot exhausted gases can’t pump out fast enough because the modified TRD CAI sucking all that cold air into the TRD blower has no where to go. So the engine just builds up HEAT, kills timing etc...

I bet the 2.8 gives a more even playing field for a “stock exhaust system” to pump out the exhausted gases. If you modified the intake side you got to mod and equal out the exhaust side headers back. Especially for FI setups.

As for theTRD blowers and spinning to the volume efficiency threshold... That’s relative. Depends on how you mod to cool that air. Elevation helps. There’s no doubt my 2.3 and NST kit is far better throughout all the rpms compared to my 2.55 pulley and NST.

 

I've done a lot of changes to it in the past month. What do you want from me?

Whatever the case may be, I guess the 2.8 plays nice with a more stock exhaust system.

Contemplating what my next move should be. @JustDSM should I just leave the 2.8 on or do you think I have more wiggle room to move down whilst still making good usable and efficient power?

 

Interesting I would be curious to see what the end result is. Thats what I am on now minus any exhaust mods. It pulls bet feel its missing some pull I was hoping for. Then again I dont have much to compare it to

 

For what's it's worth, dropping from 2.6 to 2.3 certainly increased my responsiveness but didn't give me that "wow" power increase that I expected

 

What kind of supercharger was it? Roots, or Lysholm/Twin screw?

 

It’s just all relevant to heat. Smaller pulley is more power and more heat reducing timing. When you go smaller pulley you need meth and anyway to cool the blower down you can.

 

Both of those. As well as my previous quote. I think you're dealing with a massive heat issue @12TRDTacoma .

An IAT sensor needs to be installed in the caps of yours, post aftercooler, as well as someone else's whom has a full exhaust/2.5" or smaller/HPTune. For comparisons of actual heat temps.

Heat increases, air expands, increasing pressure, which then translates to higher boost number. Giving a false positive of more power. While actually decreasing the power versus a cooler more dense air. All others aspects staying the same.

 

I have everything to do it so I guess I just should. I’m just worried about heat soak in the super charger making the iats read really
Hot on hot days.

 

That's the point. See how efficiently the aftercooler is working. Compared against MAF IAT. That change in temps, delta T, will give a pretty fair estimation of how much heat is robbing power. Between different pulleys sizes.

Obviously a good pull will be necessary.

 

Send me a PM with your latest build specs. I'll get you over a calibration to get you rolling.

 

This is amusing to me because it was only a few months ago when I said I wanted to go up from my 1.87 to a 2.3 in order to save belt life on long drives, you told me real men don't increase pulley size

I have this feeling once you figure a few things out, you'll be heading downward in pulley size before long.

 

All I can say is that modding makes no sense of reason or rhyme.