I got my welder running! I am now going to make some serious HMT up and down pipe action. This turbo is essentially a GT30 feeding a M62 supercharger. Should make 20 psi by 4000 rpm! The word is should though....

But its gonna be fun!


I will update as I go.

oh yeah... 2.2 supercharged subaru legacy currantly, getting the turbo, shooting for 20 plus psi.....

 

oh wow, i didnt know you were on here. sick!

 

whos who and whats running what

semi curious about what youre planing

 

mcdanial?

 

See the area above the red tube on the left side? Thats where I am sticking the turbo. Then see the air filter into the supercharger? That will be replaced with another intake that is aluminium and will fit perfect right to the turbo out....



I will be installing a water injection setup right after the turbo, pre-supercharger, to cool the charge before it enters the SC. I am going to be trying the current pulley setup, but may have to step it down. The wastegate of the turbo is about 16psi as I tested it....

 

it might just be me, but I'm not understanding this at all...u say ur gonna feed your supercharger with the turbo...lol...what is gonna feed your turbo?? I'm not tryin' to clown or flame u or anything, I'm just seriously curious...u are bolting the turbo to your exhaust manifold right?? ME PERSONALLY, I would just try to find a way to run that turbo by itself, you didn't list any specs but it looks huge, but that could just be the picture...

 

OH, u did say it was a GT30...yeah, I'd lose that supercharger and replace it with that turbo...

 

turbo is bolted up as normal, engine>mani>turbo. then, from the compressor, he's gona cool it, then feed the compressed air to the sc, then to the engine.

make sense now? its not that complicated.

but I agree with you, ditch the sc and go all out with the turbo.

 

CspecRun is right.

As for getting rid of the SC...... First I want to do it and see what happens.

Then depending upon the results, I will or will not get rid of the supercharger. Or... I will invest in a bypass system that would allow the SC to spool the turbo, then when it gets to 12 psi, jump to the turbo alone.

Originally my idea was fine and dandy for a smaller turbo. But I simply lucked out and got this new big *** turbo instead.....

Just waiting to get time right now....

 

The problem with twin charging is you net the efficiency drops of both compressors. 60% efficient turbo X 55% efficient blower = 33% efficiency. In the real world you don't worry a whole lot about the variance between 75% sweet spot on GT-equivalent compressors and the 60% they hit when you max them out, but a drop to 33% needs a lot of coolant to overcome knock, and you aren't going to get that with pump gas.

You're probably going to find that turbo + blower = boost spike. Doing the S-tube bypass is going to be mandatory if you want the setup to function... get a Saab wastegate that opens in the 4-5.5 psi range and use that to open the bypass, as soon as the blower has that much juice flowing a small turbo like the GT30 is already cracking.