I'm thinking this turbo
http://cgi.ebay.com/ebaymotors/T-70-...QQcmdZViewItem

This manifold
http://cgi.ebay.com/ebaymotors/Turbo...spagenameZWDVW

I think I could have the car twincharged for under 1k including piping.

Is that turbo too big or what? be running like 21-22psi on the street

 

you'll prob need a fuel system upgrade and a tune... just a little FYI 1k is un realistic

 

...500 for manifold adn turbo

I already have 60lb injectors and a cm fx400 and hp tuners

all id need is piping

that is why i thnk 1k can be done

 

i say go for it...

 

hel yeah pls do it. then ill follow.

 

you might want to think about an intercooler too

 

uhm turbo is way too big brother. 70 trim is effing huge

I'd probably say th 60 trim is too big for twincharge.

If you were just going turbo only the 60 would be a good choice.

But for twincharge look much smaller man,,, maybe a 50 series.

 

You hafta remember, unless you get crazy and build a one way valve to redirect your boost around the SC you will be limited by how many CFM you can force through the blower.

The 60 and 70 series FAR outflow this level.

And like RR Suki said up there, you will likely need more than a grand in your budget to pull this off.

You'll have more than that in a nice turbo, manifold, IC, and charge pipes

And that's not even looking at tuning/fuel

 

you need a turbo like this I think.

http://cgi.ebay.com/ebaymotors/Brand...QQcmdZViewItem

 

^^Much closer, may still be a little on the big side.

Are you planning on doing internals at all? Anything 50 trim or over could flow more than enough to make too much power for the stock pistons.

I really wanna see people start twincharging these things though. I think with a well tuned set-up 350-400 hp should be easily achievable. Then we get to start finding out how accurate the GM cook book is.

 

the s/c doesnt care what pressure the air comes in at it just compresses it more. so add air at 10 coming in and say it doubles it it leaves at 20psi.

and to do that eh turbo would supply all the air...ud jus make liek 10 psi in the pipe before the sc

that is how wincharged's car is setup

 

http://cgi.ebay.com/ebaymotors/T3-T4...QQcmdZViewItem

thinking this one

 

Dan, did you win the lottery or something, haha. Last I remember, you were talking about having to live off ramen noodles if you bought anything else for your car.

 

i really want to twin charge too but i am thinking about a rear mount turbo, seems wayyy easier, and less restritive on piping, size and squeezing everything in the engine bay.

 

It probably can be done for under 1k, I just wish I knew more about turbos, I'd prolly do it myself.

 

haha no i jut went calculating out my budget with the exta 5 weeks of work and also adding some student loans and well lets just say i came into some extra cash lol...that and my car is close to being finished

mid to low 12s

 

Careful about xs-power parts in general. They tend to run on the cheap (unreliable) side.
I have no personal experience, but if you were to search around the net and boards for SSautochrome or xs-power you might think differently about their products. I apologize if this advice offends anyone.
Good luck!

 

Hmm are you thinking of running a Twincharge set-up in series or parallel?
what I mean about that is are your systems feeding off each other or separately into the manifold

 

off each other

 

You gotta be careful with cheap turbos, just because they say "GARRETT" or "GARRETT INTERNALS" doesn't mean ****. A buddy of mine learned the hard way on his GLI. He got a replica Audi TT replacement turbo and 3 months later he was just sitting in traffic after slowing down and he heard a few pings and BOOM blew the turbine clean off teh shaft and through the housing. He brought it back to campus and there was white smoke bellowing from it, it looked like the Mystery Machine in Scooby Doo. Needless to say he has since went for a REAL Garrett GT40 Turbo and some custom equal length tubular manifold, he payed a pretty penny but hes pushing well over 400hp to the wheels. Don't go cheap when it comes to internals or parts that could destroy your engine.

 

You pansy Dan. Why are you stopping at mid to low 12s? Like the guy above me said, watch for cheap turbos. I like your Plan of Attack and I think you have all the right makings pf a twincharge kit. What injector duty cycle are you seeing now? I see about 70% and I think if you through a turbo on top of that you are going to need bigger injectors or a bigger fuel pump.

 

I've seen the autochrome manifolds in person and quite frankly it's not very good. The XS turbo stuff I've also seen in person and knew a couple people that tried them out, again a disaster. I'd stay FAR away from XS and Autochrome.

 

I'm going to wait until the Hahns one come out. Then i'll have some money and do it the right way

 

The s/c will not simply add PSI to the air already there. It takes a lot more work to compress air from 10 psi to 20 psi than it does form 0 to 10. In other words, if you've got an s/c capable of 12.5 boost (stock), feeding it compressed air at 10psi will have little or no effect on the air exiting the s/c. Take a look at how the VW has their twincharge set-up. Clicky. Granted, that's probably way more complex than what we'd see in the Cobalt / Ion, but it gives you an idea. Either way, good luck with the project! I'd love to see (and hear) that in action. *whine-hiss-psh-shift*

 

a roots blower sucks air in and crams it into a chamber fasterthan it is used making boost. if ur putting 10psi into the blower before it pushes it thru it is gonna move more air thru than if it was at 1 atmosphere. There for it will make more boost in the manifold than a s/c alone. that is how it adds. See twincharged'd car for a running example