Hey whats up guys,
I know not alot of people on here have a turbo on there car,but i figure id ask.Has anybody used the ebay turbo manifold on there cobalt?I had one for my z24,but i never installed it,so i sold it.Alot of people on the jbody forum has had good luck with these manifolds.I know the tag manifold has the flange facing down wards.Do you think the turbo will clear the fire wall with the flange facing the rear?Im gonna go outside in a little while and see how much room there is behind the motor.Im trying to piece together a turbo kit,but i dont wanna spend $4000+ on it.Does anyone know of any other companies that sell a turbo manifold for our cars?
For $165,its not a bad deal.

 

Well i looked under my hood,there doesnt seem to be alot of room back there.Theres more room on the pass side,so i assume if you remove the insulation on the fire wall,there should be more than enough room for the turbo to fit back there.Im not sure what side of the motor the flange is on in the above pic,im gonna email him and find out.Anybody have any oppinion on this?Oh,and what would you recommend,internal or external waste gate?

 

I believe it has been discovered that a turbo like the GT28 would fit back there, but any bigger and it won't. Don't quote me on that, but that's what I remember. A GT28 would be good for a street setup, it just wouldn't have as much power potential as many people want.

 

Ok,i ordered the ebay manifold.I think im gonna go with the super 16g turbo from hahn.Thats a good choice right?Whats the difference between the 16g and the gt28 size wise?Is the 16g a big turbo?I tried looking for specs online to see the dimensions,but i couldnt find anything.

 

It is bigger than the GT28 "disco potatoe". I would have to do the math, but just by looking at the compressor map the 16g would supply more flow than a disco potatoe would, but it is still to small for the power you probably want.

Edit: I just looked at it next to the GT3076R and the 16g is too small. It is meant to be used on a sub 2L engine or in a twin setup on an engine such as the VG30DETT 3.0L 300ZX engine. If you want to use a turbo that is cheaper than the GT30 but still a decent size you need to look into a T3/T4 hybrid.

 

the srt-4s have a t3/t4 hybrid

 

a gt30R(avoiding giving away my specs) will fit back there, requires a semi-custom manifold but its fits like a champ, even some room to spare

 

i know 2 guys running that header here in miami. its wuality is junk at best. they both sent that thing in for reworking. even the turbo wouldnt bolt on flush. u get what u pay for.....

 

What kind of manifold did u use,and where was the flange mounted?Pass side or drivers side?I had the guy mount mine between the 3-4 exhaust ports.Do you have any pics of your setup?Whats with the secrecy of the specs man?Help a brotha out,lol.

If anything before i install it,ill bring it to a machine shop and have the flanges resurfaced if there warped.It wouldnt cost that much.


Thanks man,appreciate it.I dont even know how to read those maps.I have no clue on what turbo i should get.It sucks cause not alot of people have turbos yet,so they couldnt give me there oppinion on what turbo i should get.When i had my z24,the super60 was a popular choice.That turbo is probably too small for me right?Im looking to put down atleast 300 hp.300-350 would be more than enough for me.

 

I think the way we have it set up we could fit an even bigger turbo on there, but we'll see once we get our cars up and running with a new way to boost

 

Ok,i think im gonna go with the super 20g from hahn.That should be more than enough power that im looking for.I just called them up,so ill probably order it from them either today or tommorow.

 

That turbo is roughly the same size as the GT30 and will work very well.

 

Is it?Thats cool.Plus its alot cheaper.Its gonna cost me alittle less that $900 shipped from hahn.

 

Cough* Garrett GT2871R Cough*

Yes, the 16G will be too small. I have it on my Acura Integra B18B LS and at 15psi and it pulls like a ****, but if your looking for closer to 400whp it will not push enough air. The small 16G is good for 340 whp/ 505CFM @15psi. The Super 16G is good for around 360whp/ 550CFM @15psi IIRC.

 

If you look at the compressor maps, both the GT28 (Rated at 350hp) and the Super 16G (rated at 360whp) are similar in size. Both of them are slightly small if you want to run "at least 300WHP". You would need either a GT30 or a 20G for that. I'm not saying they won't work, but it will be pushing them to make 300WHP (340 at crank, which is what the turbo is rated at, not WHP); instead you can get the next size up and make the power with less effort on a higher efficiency island.

 

big 16g, ported and clipped.

call it done for a basic street car.

 

True, the Super 16g would be good for a Cobalt street car. I can't tell exactly how much power he wants to run. By saying at least 300WHP, that makes me think he would actually like to run 350WHP which would be reaching the outer limits of the Super 16G, but would be in the best efficiency range of the 20G.

Hey man, will you make a more detailed post concerning what power levels you would like to see and what you will use the car for. This would really sway which turbo out of the Super 16g or the 20g you should go with.

 

I want atleast 300 hp.Im pushing 250 now.I dont need 400+ hp.Just something nice for daily driving and have a nice top end.The most im looking for is 300-350 hp,thats it.

 

Well then you probably would be good with a Big 16g. Evos put down 350whp with it if they set it up right; but at the same time some of them achieve around 300whp. 350whp would be at it's limit.

Looks like a good deal: http://cgi.ebay.com/ebaymotors/TD05D...QQcmdZViewItem

Edit: The thing is, you can go with the TD06 20G and have the ability to make a little more power in a slightly better efficiency range without sacrificing your low end. You may even consider the price as the big 16 and 20g are fairly close in their capabilities, but the big 16g will be cheaper most likely.

 

Big 16g huh?Well evos are awd,so they are gonna lose alittle more hp than us.Damn i gotta decide which one i want.Im gonna order it tommorow.

 

Make your decision based on what you want. Take your time and don't rush into it. If you have any doubt as to which one you want, then you should look into the two and compare them a little more so you will have a better understanding of their pros and cons.

 

you say that now. But in a few more months, you'll want 400

This isn't something to rush into. I've been researching my setup since february, and I know 06Black was researching his for several months more when he asked me to go turbo with him. I might order my turbo today, because I've just finalized my setup.

 

Yeah ok,i wont jump the gun and order it.Hey timmyo,what turbo are u going with?No need to be secrative,we're one big family lol.Pm me if you dont want everyone to know.

 

your getting totally off point with the EVO comparisons....

the 4g63 is in every way, shape, and form a better boost motor then our ecotec is....the heads alone flow more then double what ours do stock VS stock

the evo, dsm's, ect will make more per given turbo then we will....our CR will help eliminate some of the gap at lower MAP pressures but in the end we loose.

 

The problem with jumping the gun is that you need to know how your complete setup will be before you order one single component. For instance, both the big 16g and the 20g are good turbochargers, but one may work for you and one may not. This could be influenced space available, money available, supporting modifications you plan on performing, fuel available. Pretty much everything plays a small role in the big picture.

Sit back and research and put together a complete list of what you will need, including price, and then begin to edit that list as needed using it as your baseline. This works well as many people plan in short bursts when they have time but if you do not document your findings then you will forget important facts that you wanted to remember at the time of reading it.

Uhhhhh.......I'm talking about CFM flow (From the turbo, not required by the engine). You cannot compare the two engines but YOU CAN compare the amount of FLOW the turbo has AVAILABLE at a specific pressure ratio. I'm not saying our car will make anything similar to those numbers, just that the turbo CAN support those numbers.

You cannot produce over X amount of horsepower without X amount of CFM; if a turbo is rated at say 600cfm max flow at X pressure ratio, there is a limit to the amount of power it can make as power created has a relationship to how much CFM the engine flows with the variables being things such as VE, IAT, IAT after intercooler, Discplacement etc. etc. So reguardless of what engine you are talking about, the big 16g for example, has a max amount of power it can produce at around 400hp (This is the spec for the turbo), and if you can make your engine match that flow, you can produce that much horsepower depending on setup.