First OFFICIAL TWINCHARGED M20 BUILD

[darvo]

I've had that intercooler on my ebay watch list for quite some time... I've read that these help with turbo spool...

hey I totaly understand. My first attempt was keeping the throttle body in place I wish it would of worked. Also that intercooler of yours you will have to sell it :) your going to need one of these:


these are soooo much more effecient its crazy. Corky bell in his book supercharged describes it best. Its not how long the fin tubes are its how many of them you have in total and in this setup it does the job of cooling my twincharged really well plus you need the same side in and out 2.5" tubes.

[Mr. Tasty]

FLG and DARVO .... Guy's here is what we are going to do. I put some tought into it and screw the group buy and screw me making money I would have a lot more fun working with you guys remotely as a coach in helping every step of the way. Start a new thread together or individual when your ready and I will guide you both (only thing I ask is you be friends with a welder or learn how to weld mig :) its worth every penny. I will tell you what materials to buy...where to cut...where to weld..everything. Second thing please buy the MSII computer from our friend whodwho if you dont already have MSII and I will give you guys my twincharged tune running 60# injectors for it.

I love helping others... the wicked smile from ear to ear your guys will have when done will be all worth it for me.

very cool. Might have to go scoop up an m62 then!

[FLG]

Denny, how hard would it be to put the alt where the compressor was? Just curious as this would eliminate having to deal with doing anything with the power steering.

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[Denny]

Denny, how hard would it be to put the alt where the compressor was? Just curious as this would eliminate having to deal with doing anything with the power steering.

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It can be done and I believe I had tried on my first mokup design and the CPS was in the way of the belt somehow. But I have to admit I didnt put too much efford in it as I wanted to go electric PS anyways and moving the alternator to the manual PS was extremely easy making room for the nose of the supercharger.

[FLG]

Denny, what year cobalt for the sc?

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[Denny]

Denny, what year cobalt for the sc?

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2005-2007 sometimes the gang at www.cobaltss.net have some for sell cheap.

[FLG]

Thanks.

I'm gonna stop at a yard this week, also have a bud who owns a yard in Kansas who is gonna take a look for me

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[darvo]

2005-2007 sometimes the gang at www.cobaltss.net have some for sell cheap.

I'll check there, because on ebay they are high on price! :hitler:

[BimmerJeff]

I almost scored an M90 on ebay pretty cheap but I'm glad I didn't if the M62 is the ticket.

[chance]

yea I think the m90 would be a bit big for an m20

[FLG]

yea I think the m90 would be a bit big for an m20

If I'm not mistaken the m62 is easier due to the built in bypass valve whereas the m90 doesn't have one

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[tinkwithanr]

yea I think the m90 would be a bit big for an m20

Depends on the displacement of your M20 ;)

[Denny]

I almost scored an M90 on ebay pretty cheap but I'm glad I didn't if the M62 is the ticket.

The only M90 I would consider (and do have as a spare in my garage) is the M90 from the Thunderbird. Compact and powerfull but pricy I bought it for 250$ and it needs a rebuild.

yea I think the m90 would be a bit big for an m20

A little on the big side for a 2.5L M20 I want quick reaction for low end torque and I wasnt going to use it over 10 PSI anyways so it stays efficient.

If I'm not mistaken the m62 is easier due to the built in bypass valve whereas the m90 doesn't have one

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The bypass is cool but I dont use as it doesnt fit with the pressure valve and at only 10PSI I didnt see the need...I chose the M62 for fitting and the neck length was perfect.

Depends on the displacement of your M20 ;)

Yes, that is true too. I'm planning on using my M90 for the M30( it will give me quick response just like the M62 on a 2.5L ) that's going in my red vert.

[FLG]

Isn't the bypass valve there so when your in vac it dumps excess pressure?

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[Denny]

Isn't the bypass valve there so when your in vac it dumps excess pressure?

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nope, the throttle body is before the charger ...the roots only compresses the air that I let in. The bypass valve is there on stock for extra fuel efficiency at idle and part throttle but It removes a lot of the instant ready torque. In my twincharged the BOV is placed before the throttle to release the extra boost from the turbo when I close the throttle. And I also added a BLV after the SC but thats too limit overall boost and protection.