1JZ Supercharged?

[TasCressida]

ok ok ...sounds silly i know...and the whole why would u etc.
But lets loose the twins or dingle turbo idea and go blown!
but for some low down grunt more than top end is my idea.

ok im thinking the same vortech V-trim style blower that they use on the 5.7 GEN3 etc.

i have a purpose for wanting the low down power...... towing etc...and i may happen to have a 1JZGTE handy lol. why the hell not?

im talking aftermarket ecu and a decent size pulley ratio to go with some rather large boost. would be used with an auto.

please tell me your opinions etc and any other ideas.
please dont flame .... i burn easy lol

[lexsmaz]

As you probably are aware one is free horse power & one is not ..

I heard recently of this gen 3 ? super charged engine taking 70 horse power to run the super charger !! Not sure at what boost though ..

[TasCressida]

huh? lol no idea just researching but it could be a viable idea pending pro's and cons.
ok any other info on this horse power drain?

cheers mate!

[Duk]

ok ok ...sounds silly i know...and the whole why would u etc.
But lets loose the twins or dingle turbo idea and go blown!
but for some low down grunt more than top end is my idea.

ok im thinking the same vortech V-trim style blower that they use on the 5.7 GEN3 etc.

If you are after low RPM, crack of the throttle torque, then it won't come from a centrifugal supercharger. They rely on shaft speed for the compressors to pump large amounts of air in the exact same way a turbo does. Boost rises in praportion to engine speed: more revs=more boost. Turbos have the benefit of being able to achieve your desired boost pressure befor the engine reachs it's redline, tho.
Real low RPM power can be achieved with a well specified turbo set up, but ultimately the easiest method is a well matched positive displacement supercharger like the Eatons type.

PS, turbos are not free power.
The required gas speed to make a turbine wheel spin at the speeds required to make a centrifugal compressor pump the kind of air need to make useful boost pressure, is 3-4 times that of the exhaust gas speed that comes out of the exhaust port.
That speed can only come from pushing the same amount of gas thru a smaller diameter hole in the same amount of time.
All of that equal back pressure on the pistons and that uses energy that could otherwise have been used to push the car.
No such thing as a free lunch

[TasCressida]

cheers plonk!
can an eaton type be adapted to a 1JZ?
can u please give examples of both types and how i may utilise one or the other for a 1JZ.

im new to the whole blown theory lol.

im keen on doing it though.

better to learn now than try and fail lol!

[Duk]

I've not seen any positive displacement superchargers on a 1JZ. There was a 1JZ with a centrifugal supercharger in a BMW race car featured in Zoom some years ago. The owner might haunt Toymods aswell.
There are some good examples of blown 1UZFEs around the forum. Search function is your friend (1 that u don't want to see to often, but still a friend )
Judging by you sig, if you are genuinely after a 10 sec car, I think you'd be better of staying with a proven turbo set up.

[TasCressida]

na na not for my car ....... the TD07 is staying lol. maybe ...unless i can do this with my car aswell lol ....SC that is. could be a good project lol
i searched but nothing.
the Vortech system seemed proven so i thought id start with that.

[oldcorollas]

centrifugal blower is the worst of both SC and turbo.. but worse than their worst....

irm losses from vortech up high is greater than SC(maybe?) and much more than turbo (turbo losses = making cams smaller duration.. effectively)
plus you get no low end torque, and only a linear increase..

basically, vortech is dynoqueen stuff, or good for cars where they trundle around at low rpm, and then have some boost at high rpm.
to get low rpm boost means you need to gear the heck out of it.. and then mans vbleeding off a massive amount of air up top. like maybe half.. so you double the losses of an SC, and still only get same boost... seems stupid.

it is good for V8's with small rev range.
it is bad for tech engines with large rev range.

they feel "fully sik" because the boost builds with rpm.. so you get more of the turbo rush.
rather than SC which is solid torque and feels more boring.

if anything, twinscrew, or have turbo blowing into SC.

[TasCressida]

cheers OC, can u explain twinscrew for me lol?
google shows me 2 timer screws and a dodgy USA born know it all that has a DIY website.

[big_zop]

I've not seen any positive displacement superchargers on a 1JZ. There was a 1JZ with a centrifugal supercharger in a BMW race car featured in Zoom some years ago. The owner might haunt Toymods aswell.

I do have that magazine somewhere and if i find it i will put it up for you.

While i dont know much about superchargers and would be going off the other information presented here, is it really going to be worth the effort and cost to adapt one on, not too mention if you want to use something new(ish), its going to cost quite a bit when the obvious selection is a big V8 (as you have already mentioned). Plus i suspect that you will be surely disappointed as its just the same as matching a turbo to an engine, there is a great chance to stuff it up.

If it has to be toyota there is no going past the 1UZ but if you want the response of a supercharged LS1, then install a supercharged LS1 or buy a Commodore.

[brett_celicacoupe]

an M90 would be well suited to the 1jz. they go on ebay for around $500-$700

once you remove the turbo gear you can mount the supercharger in that space.

run an intercooler and water injection and it would be a excellent setup.

when you get a blower, make sure you get the piping with it as the intake has a bypass built into it.

i say give it a go, the results will be interesting

[Norbie]

but for some low down grunt more than top end is my idea.

If this is the case I'd have to ask why you have a 2.5 litre engine in the first place. A 2JZ or 1UZ would be a better place to start if you want low-RPM torque. There's no replacement for displacement.

[TasCressida]

ok norb reason was there is a1JZ handy i can use lol.

1UZ is second on the cards but id have to source one. not hard i know but its not handy.

was just a thought lol.

maybe twincharge the bastard lol! booyah!

[Norbie]

The words "false economy" come to mind.

[gianttomato]

Just get a V8 like an LS1. Have heaps more torque in standard form than your centrifugally supercharged 1JZ and will come in cheaper.