TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

I really need to do this

 

Maybe the rotors have more twist?

 

No they are just larger. And in so they can move more air by turning slower.

 

How much more air can a 2.3" pulley move compared to a 2.5? I'm trying to get a reference point for kelford.

 

I’d have to look into it but it could be possible for me. My blower manifold is relatively simple. It’s just the blower down below, plate sandwiched in the middle, and then the intake plenum up top. Could maybe get a new plate made with a bolt pattern that matches the M112.

Would need a built motor though.

 

Somewhere around 400rpm more at the rotors. I don't know the exact numbers unless I calculate it.

 

I got 8.5%

 

There would be no reason for a built motor from the 90 to the 112 my man.

 

@JustDSM noticed on tuning that the 2.3 doesn't move more air at the top end than the 2.5. Probably a ceiling of how much air the blower can move. What it does is get to it's maximum much quicker in the midrange than a 2.5. My butt dyno feels this is accurate, the 2.3 has more jam upon acceleration but tops out the same as the 2.5.

 

I just told him 400 hp number and he left it at that

 

16,290.45 with a 2.3 at 5500 RPM
14,987.50 with a 2.5 at 5500 RPM

1302.950 RPM difference.

I was wrong. Lol.

 

Exactly. Too much money for little gain here.

I could just do a...wait for it...LS swap.

 

Just keep the A750 tranny. GM is famous for well built motors, their transmissions are built like garbage. Notably the 4L65e and the 4L80e variants which are usually mated to most LS and LQ series engines. Lol.

 

I’ve got a a761e. Basically the 750 with an extra gear.

Don’t they have some new space age 15 speed transmission with quadruple overdrive?

 

Yeah. They should had stuck with a 4 speed. Less gears to get damaged. Lol. I guess some warranty work and/ or 60K major rehaul work is in short order.

GM. Lol.

 

Not trying to start an argument here, but im curious how this could be the case if @Athlaos has seen a 444g/s reading with his 1.87.

Maybe the increased MAF voltage that UCon uses to read over the 324g/s limit is causing an inaccurate reading?

 

The 2.3 should spool faster but also have more top end.. unless it’s at the blowers max efficiency it should keep pushing more air so if you don’t see a difference I would think it is a tuning issue. Or the blower is spinning so fast its making creating a vacuum in the intake, at which point you will probably need to chop your intake on the sc and make a new one like roosty plans on doing.

 

https://stiegemeier.com/services/snakebite-kit/
I'll just dip in and leave this here for everyone that keeps going lower and lower on pulley mods

 

I thought it had been established that this will lead to certain engine death on a stock engine, no?

Still kinda want to though....