As I have been investigating doing a turbo on my xB I have come across some info that suggests a twin turbo setup would be best. Twin small turbos for fast spool up. What has anyone else found?

 

no. i dont want to sound mean but why would you twin turbo an engine that puts less than 100 hp to the ground? leave twin turbos to supras and VR4s. a blitz supercharger would be more appropriate IMO because it is tuned and you wont mess up your engine as bad. either that, or wait till a reputable company comes out with a good bolt on kit with the ECU, piping, and lines taken care of. This has been discussed quite a bit with people wanting to try this. i would just say wait for a good kit from a good company, blitz it , or leave it alone...

 

Yes, twin turbo is worthless... unless you use a small spool, like the GT15. Either way, you're better off using a single medium sized spool.

The USDM Blitz kit is good for 10-20hp... that's a little weak for me. Roots blowers = power robbers/heat monsters = inefficient in comparison to a turbo or centrifugal s/c.

 

yeah centrifugal is best for s/c . but ya still need an intercooler/aftercooler.

 

You don't need it, it's just better with it.

 

well yeah thats what i was sayin.

 

twin turbo is best for a higher output engine. not something that small.

They really don't make turbos small enough where having 2 would be best. If you want a fast spool on a smaller engine, go with a T25, that may be best and they're dirt cheap.

 

Did you see the latest RIDES episode where they twin turboed a muscle car but it started out stock with like 375 foot pounds of torque.

But I mean the way that they twin charged it from scratch looked simple enough but they had a ton of room to play around with...that would be an interesting project

 

**moved to the xA/xB area**

 

no twin turbo in scion... to weak.. supercharger or turbo would be ok but still only minimal gains

 

naw to the twin turbo..... first because its useless........... second because u cant fit two turbos and all the piping in the engine bay without relocating and recessing the firewall..... ive been investingating a turbo and i will be sure to keep yall posted throughout scinolife...... remeber fusionscion..... ill be back..... lol

 

Turbo on an old muscle car would be simple. All the room, no ECU, just turn a few screws on the carb ;-)

I WANT twin turbo in my '72. I dunno if it'll ever happen. It's got a 350ish (I think that figure is very generous) hp 350 ci in it right now but low enough compression to run 87 octane without a problem. Problem is, I bought the truck with the engine already built and installed so I'm not sure what's in it. BUT, it just seems fun to have two little turbos in there.

 

wow....just wow...

1. no twins on a 4 cylinder motor, you only have one exhaust.

2. turbo has a steep learning curve, and unless you have deep pockets, I'd advise you to stay away.

3. the Greddy kit puts down about 175 hp, and that is more than enough for what you fellas are looking for.

with the Greddy kit, you'll be faster than any other Scion you see, and that's about all you can hope for...

 

Well you could make a manifold that runs each turbo off of 2 cylinders, or a sequential system. You can do twin turbos with a 1.5 4 cylinder but there's not much point. The 1.5 is so small in displacement and therefore in exhaust volume that 2 turbos would have to be really tiny and innefficient to work off of half of it. A single small turbo is definitely the way to go. Without building the motor, or at least lowering the compression I doubt it would take more than 6 or 7 PSI without grenading anyway.

 

you're correct, Cody from LoveFab did a B16 with that funny equal length mani, and hung 2 t25s off of it in a sequential system. It was neat, but it puked a rod out of the block in a few days....

 

[quote="jdaniels"]it's not a roots blower dude..

go read up..

it's a twin-screw made by Lysholm

 

no you don't.. not at 6pSI

and the centrifugal really ISNT the best SC.. it's less volumetrically efficient of the 3 types of SC's.. better mechanical efficiency, (fewer moving parts) but you STILL have to wait for spool like a turbo.. meaning you get lag.. meaning you just wasted $$ on an SC that doesn't do what you want an SC to do..... provide boost at a lower RPM..

the Blitz kit has a lot of potential. it's tuned down so people wont give it a bad rap for "blowing up" their engines.

people are stupid. if you give the average Joe a blitz SC, GUARANTEE he'll run 87 octane in it cuz he's broke after paying for his SC..

 

it isnt the best sc but it can yield the best gains and for the small size for this application , there shouldnt be too much lag.

 

anybody ever think about using a sequential twin turbo?

 

Are you saying i could get 175 hp out of my xb with a greddy turbo?? cause if i can...ill get one as soon as i can