S.A. MSP's Twin Turbo Build Thread

[S.A.MSP]

look at this

 

[1moreMPH]

wow thank you for that, good find. That's the way to do it, exaclty.

 

[crashkelly]

werd the little turbo+bigger turbo = awesome power across your power band.

 

[S.A.MSP]

i'm glad i found that, i think that is my choice

 

[melicha8]

What abouts a twin turbo from an Rx7

 

[fr0st]

dont forget , a big turbo and a small turbo might be problematic as well..

the small turbo will spool up ok IF the gases are not diverted 50/50 to the big one.. if not.. it will take about half more time..

then if you ever spool up ok and hit high revs and the bigger turbo IF/CAN spool up as well.. as if you put a large turbo and you divert to a smaller one half or even 35% of the flow to the smaller one, you lose 35% to the big ones flow.. so it spools up slowly and COULD not reach peak performance.

this is all a theory but still possible to achieve..

the other cars you see that are twin turbo have alot more displacement than 2 liters.. and dispalcement is directly proportionnal to what you can push out and the stock cars equiped so are usually use same sized turbo
if not, you'd see pontiac fireflys 3 cylinder turbo with a garret T04 strapped in.

if a 1JZGTE/2JZGTE uses 2 very small turbos to push out 300 hp, what makes you say that a 2 liter 4 cylinder can put on a small and a big one?

dont forget, too much is like not enough.. theres a diffrence between a small-ER turbo and a bigg-ER turbo..

sure with flaps to control the flow it might be ok.. but it's hell ofalot easier to put equal sized, small turbos.. you get the big turbo CFM flow and the small turbo no lag-ness

 

[1moreMPH]

how does that work with 2 small turbos? I know many cars utilize that, but i would think that the low-end one would be fine, but the high-end turbo would just be spinning so damned fast it would be out of its efficiency range. Perhaps im looking at this the wrong way. Explanation?

 

[S.A.MSP]

you mean the explination for the two same sized turbo's put in a sequential setup? i wanna know too, just seems like that one is a tad pointless, two small ones in line is a go and a small one feeding a big one is a go, like the Cummins twin turbo setup

 

[kudakev615]

 

[S.A.MSP]

that was previously posted, but still a good pic, i like how theres a radio in there

 

[S.A.MSP]

it's pretty much a setup similar to the Squiers Turbo Systems but...in the passenger seat

 

[neox.286]

lol...I wonder what it sounds like inside? haha

 

[S.A.MSP]

lol...I wonder what it sounds like inside? haha

you can't hear it, the radio is always turned up all the way LOL

 

[TXMazdaSpeeder]

i bet its 1200+ degrees in there

 

[Velocifero]

yea, i know, don't remind me, i'll have to stick around more often

there is an awsome event this Saturday night!

I made a little drawing way back, of a sequential setup that I have never seen done before. It's floating around one of these threads somewhere.

Basically, you run a large turbo in the msp's stock location, and a smaller turbo where the stock airbox sits. Exhaust manifold feeds the large turbo just like a normal single turbo setup. Connect the turbine outlet on the large turbo to the turbine inlet on the small, with a pressure actuated exhaust cutout in between them.

Compressor outlet on the large turbo goes to a FMIC and then up toward the TB. Compressor outlet on the small turbo runs straight up towards the TB and is Y-piped with the larger. A pressure actuated solenoid flapper valve will open and close the smaller turbo's side of the Y-pipe.

Downpipe from the small turbo is tied into the exhaust system. Intake for both depends on where you want your MAF.
Fairly easy setup, the hard part is timing everything right. If you get your exhaust cutout in between the turbos and the flapper valve in the Y-pipe timed right, you have a perfect sequential setup. Small turbo spools and goes right into the motor, indirectly spooling the larger turbo. Once your large turbo is spooling, the Y-pipe closes, cutting off the feed from the small turbo (and preventing any backwards pressure from going down the small turbo's compressor outlet pipe). At the same time, the exhaust cutout opens, letting the large turbo breathe freely with no restriction.

The only variable that I can't figure out without actually testing it, is whether or not the large turbo will create too much parasitic drag being in-line first. The smaller turbo might not spool quickly if the large turbine is slowing down the flow too much.

However you do it, have fun and post lots of pics!

With a full standalone EMS he can throw the MAF in the garage, it isn't needed

 

[lil_red_wagon]

i would back mount a small turbo just behind the tranny and exhaust mount one in the stock location. that way, you could have the sequential off-set of two spools with little or no lag and high end power where the small turbo runs out of steam. i would check into trying to up-fit a FMIC from another application. you may have to just have the two outlets from a twin merge into one and run some kind of diaphragm that will keep them from blowing down each other.

i have to be honest, this idea has crossed my mind a few times. my main concerns were the drive-train itself. i know that this will tear up a tranny and maybe even break an axle. all of the other concerns are easily remedied. good luck

 

[tracknfield423]

has anyone considered a rear mounted turbo at all? i don't know much about them or TT setups but if hes doing a dual exhaust can he rear mount both. . . or maybe rear mount one and mount the other in the engine bay?

 

[lil_red_wagon]

that is basically what i suggested. one back-mounted after the downpipe, one in the bay.

 

[Alejo_NIN]

he's refferring to mounting the turbo right before the muffler...
which i'm against completly, coz seeing how low our cars are, going thru rain will definately crack a blazing hot turbo

 

[S.A.MSP]

exactly, i have to stick to the engine bay options, my car is lowered too, a while ago i wanted to do a side exit exhaust but the car is low for that too much less fitting a turbo under there, if i do the sequential setup i won't have dual exhaust since the exhaust gas from the smaller turbo will feed the other turbo