rock and hard place

[rspidydude]

So for the past few months iv been torn between a couple options.

1. keep the supercharger, get the nst pulley kit, new ic and ic piping with a new exhaust from the manifold back.

2. go turbo, loose the supercharger all together. n/a intake manifold, turbo and manifold all that good stuff as well as new ic and ic pipes.

3. best of both worlds, TWINCHARGE!!!!!!

I love the low end grunt that the gze has but i want a little more out of this bad mutha, right now im stuck and dont want to start buyin parts and change my mind half way through my build. With that being said what would u guys do and what would you like to see, i love doin something that people rarely do.

[mr3]

You could go with a twin charge set up and have the sc cut off when your turbo spools up to a certain pressure then run the turbo for the high end boost. Sc for the low end, turbo for the high end.

[como]

twin charge.
Was there really any question? If you're going to do something, you might as well go all out.

[rspidydude]

thats exactly what i was thinking. go big or go home right. with that being said what would you guys recomend i use to switch off the s/c at like 3500 rpms

[yoshimitsuspeed]

Originally Posted by rspidydude

So for the past few months iv been torn between a couple options.

1. keep the supercharger, get the nst pulley kit, new ic and ic piping with a new exhaust from the manifold back.

2. go turbo, loose the supercharger all together. n/a intake manifold, turbo and manifold all that good stuff as well as new ic and ic pipes.

3. best of both worlds, TWINCHARGE!!!!!!

Worst of both worlds too
Parasitic loss
exhaust restriction
longer more complicated intake piping
Extra weight
Less motor bay room
More to break
Harder to work on

You can get a turbo that has full boost before 3k RPM you really need more than that?
If you are going for huge numbers and want a massive turbo on there it makes a little more sense but still just seems silly to me 90% of the time.

[MR JAS]

Originally Posted by yoshimitsuspeed

Worst of both worlds too
Parasitic loss
exhaust restriction
longer more complicated intake piping
Extra weight
Less motor bay room
More to break
Harder to work on

You can get a turbo that has full boost before 3k RPM you really need more than that?
If you are going for huge numbers and want a massive turbo on there it makes a little more sense but still just seems silly to me 90% of the time.

i agree the little gain you will have by having both will be out done by engine restrictions and weight

better and cheaper would be a well matched turbo that supplies the whole rev range

[toyotaspeed90]

I agree as well...

with todays turbo's and understanding of efficiency maps... there's no need to run a twincharge other than a "look what I can do" setup.....

[rspidydude]

so then everyone thinks that i should go ahead and go turbo then. so what would you guys recomend as far as turbo size and all that good stuff. i had planned on just throwing on an n/a intake manifold and and all the turbo stuff and that should do it then.

[ToyotaTechGeek]

disco potatoe ftw!

[como]

I say sc or twin, but that's only because I don't care about performance... only "look what I can do"

[yoshimitsuspeed]

Originally Posted by rspidydude

so then everyone thinks that i should go ahead and go turbo then. so what would you guys recomend as far as turbo size and all that good stuff. i had planned on just throwing on an n/a intake manifold and and all the turbo stuff and that should do it then.

I am partial to the DSM/Mitsu turbo's since I am familiar with them.
DSM T25 will have super early spool and will push a good bit of boost to redline but you will be working your way out of the effeciency map on the top end.
If you want quick spool over top end and up to maybe 8-12 psi great choice 14-16 psi or so and you will be pushing it's limits.
14B Probably a pretty happy compromise between reasonably quick spool and pretty decent top end with the ability to run some pretty high PSI if you so chose.
One of the 16Gs would be a bit laggy but would breathe something fierce on top and push just about anything your motor could ever take.

Unfortuntly there aren't Mani's available for the 4A and mitsu turbos
The Ebay cheapy is T3 so if you are on a budget a used t3 or T3/T4 would be more practical.
Speedsource mani is available with a Garret flange but is a bit more expensive.
Unfortunately I am not nearly as familiar with those.

[mr2_mk1.5]

an idea i always had and thought would be interesting and is actually based off a car I read about but can't for the life of me remember which car but basically a setup I could imagine for twincharging is use a supercharger that has an air door in it used in some jackson racing series superchargers I believe. anyways rig up a clutched pulley like the ze is and run some sort of rpm switch like an msd so the supercharger airflap opens at say 3000 rpm and also disengages the clutch pulley completly eliminating parstatic load drain on the engine and bypassing the rotors and build plates that allow pipes to be attatched to the inlet and outlet and duct the outlet into the inlet of the supercharger, literally make an insulated bracket right over the turbo and then intercool the charge and shoot it into your intake. The purpose of this you ask, by using the supercharger to feed the turbo allows you to use a slightly larger turbo then you normally would be able to on a 1.6 but with no lag and fast spool. or if you want to do something completly different and off the wall have you ever thought of custom building a paxton procharger setup

[mr2tim]

Here's a tidy unit that I understand spins real high RPM.

They appear to be somewhat commonly available at the "yards"

Looks real interesting size wise for a Mark 1 small engine bay.

Any comments?

[ToyotaTechGeek]

what is that off of? there are many different SC's out there that are readily available in the junk yards, but engineering is sometimes prohibative in regards to integration.