TRD supercharger questions

[Photoman]

2.6" Rick on the original style supercharger. The inside of the pulleys have to go part way over the nose to align with the crank pulley.

Bill

what is the smallest pulley that can be used without modifying the nose cone?

 

[pkelly72]

What's the OEM pulley size?

 

[landtank]

2.6" Rick on the original style supercharger. The inside of the pulleys have to go part way over the nose to align with the crank pulley.

Bill

thanks Bill, if you look at the newer style that section seems to be machined smaller. Was curious if an even smaller pulley could fit now.

 

[Photoman]

thanks Bill, if you look at the newer style that section seems to be machined smaller. Was curious if an even smaller pulley could fit now.

The ID of this one is roughly 1.882 inches. I never saw any of the newer ones. Maybe they went to a smaller bearing size. These ones could not be turned down too much because of the bearing snap ring.

pkelly72 - 3.2 inches was the original pulley diameter.

Bill

 

[pkelly72]

Thanks, Bill. I ordered the 2.8" and getting ready for intercooler after the holidays.

 

[NLXTACY]

Thanks, Bill. I ordered the 2.8" and getting ready for intercooler after the holidays.

Which IC?

 

[pkelly72]

Djsixbillion. Desmond is about an hour or so away.

 

[Moab bound]

I think that one is gone.

CDan will charge $3299 for the SC assy + shipping.

There are some other "while you are in there" upgrades that are worth it and CDan will discuss these with you.

Thanks. I missed out on that other one. Will try CDan.

 

[Atoyot1031]

I'll try and post a picture from behind the 2.6" pulley sometime soon to give an idea of room.

 

[ClankBang]

If you could compress the air with no external factors yes, but you can't. You have meshing lobes that create heat to compress the air. This is pretty common knowledge.

"Of the three basic supercharger types, the Roots design historically possessed the worst thermal efficiency, especially at high pressure ratios." - Bell, Corky. Supercharged!. Bentley Publishers, 2001, p. 48.

Like I have said many times hard factual data, that is what people should be asking for. I can provide the turbo data will anyone with a supercharger do the same? It would be quite obvious I think.

Not only that I have shown via the compressor map on the closest M90 that you don't see positive manifold pressure until 2500+ rpms I have shown I have more boost at that rpm with a properly sized turbo. Again, I can provide the data, and I put it out there. No one has shown any different than I have said with the TRD Supercharger.

On some what of a side note...
Are there turbo chargers that max out as low as the TRD super charger does?
Meaning my super charger maxes out at about 6 psi and the lowest max I have seen on a a Turbo is about 14 psi.

 

[scottryana]

Yes there are turbo chargers that are riding lawn more size. psi is an ok measuremeant but really the right way to compare them would be to look at CFM's or lbs/min. You could very easily get a turbo that will only compress the amount of air you are looking for.

 

[beachcomberspi]

I am not sure what you are saying about intercooler - this is TRD low boost about 6-7 PSI supercharger what is intercooler will be coiling with that much pressure it is not like turbo where you have 15 to 25 PSI , you sure about that ? or you just think it is cool to have one?

What I was saying (back then) is that the smaller the pulley the higher the heat. So an intercooler can be very helpful.

 

[FDNewbie]

Here's a graph of pulley size and the differences in hp and torque.


Pulley Size Max Boost Max Horsepower@4350 rpm* Max Torque@3350 rpm*


2 12.5 358 434
2.2 11.5 347 422
2.4 10.5 335 410
2.6 9.5 323 399
2.8 8.5 311 387
3 7.5 299 375
3.2 6.5 288 363

Are these 80-series specific #s, or the max power levels supported by the supercharger itself based on the given pulley size? Cuz I've never come across anyone with a TRD supercharger making 300hp. Or anywhere even NEAR that.

One dyno result: https://forum.ih8mud.com/80-series-te...ml#post3619813

25% power increase at the wheels:
- Factory: 100rwhp @ 3800 rpm
- Supercharged: 125rwhp @ 3800rpm

From a Slee supercharged truck (https://forum.ih8mud.com/80-series-te...l#post3620290)

21% power increase at the wheels:
- Factory: 138rwhp
- Supercharged: 167rwhp

So even if we account for 25% drivetrain loss, 323bhp = 242whp, which is around 70+ rwhp (a LOT) more than any TRD supercharged 80 series I've ever heard of...

 

[LXDOC]

With stock pulley, no intercooler,mine develops boost around 1700 rpm. I can assure you the gain is more than 25-30 hp. Off idle torque is the greatest improvement over a stock non-pressurized powertrain.

 

[PoorHouse]

With stock pulley, no intercooler,mine develops boost around 1700 rpm. I can assure you the gain is more than 25-30 hp. Off idle torque is the greatest improvement over a stock non-pressurized powertrain.

You have anything to support that?

 

[farrk007]

I got TRD SC installed and it is good, 2 question to experts:
1. so I need to do anything to fuel injectors like install BOSH 4 hole or refurbish my original, my rig have only 140K
2. Going to the smaller 2.5" pulley, how much do it gained ?

where did you score the s/charger? and how much did it cost?....been looking to get one for a while.

 

[beachcomberspi]

Are these 80-series specific #s, or the max power levels supported by the supercharger itself based on the given pulley size? Cuz I've never come across anyone with a TRD supercharger making 300hp. Or anywhere even NEAR that. One dyno result: https://forum.ih8mud.com/80-series-te...ml#post3619813 25% power increase at the wheels: - Factory: 100rwhp @ 3800 rpm - Supercharged: 125rwhp @ 3800rpm From a Slee supercharged truck (https://forum.ih8mud.com/80-series-te...l#post3620290) 21% power increase at the wheels: - Factory: 138rwhp - Supercharged: 167rwhp So even if we account for 25% drivetrain loss, 323bhp = 242whp, which is around 70+ rwhp (a LOT) more than any TRD supercharged 80 series I've ever heard of...

Sorry for the late response. TRD numbers for the 1FZ-FE at a given pulley size.

 

[ChiTown]

TRD always quotes crank hp instead of wheel hp. But those numbers still seem a tad high?

 

[scottryana]

Every dyno will be different that's why you can't compare dyno to dyno only before and after on the same dyno. For example my truck was 35% drivetrain loss on the dyno I used.

...via IH8MUD app

 

[LXDOC]

You have anything to support that?

boost gauge