Hey guys,

I heard that the TC has a "small" turbo and would benefit from a larger one. Wouldn't it be better to change the intake, exhaust system, and other things in order to gain power rather than putting more pressure on the motor by using a larger turbo? I'm a total idiot so please do not laugh too hard at my retarded and completely mindless questions.

Thanks
Jake

 

i would have to agree with that......for now. If parts start coming out for the ss/tc, that could help it support a bigger turbo then i don't see why upgrading is gonna hurt anything

 

basic rule of turbo cars.... supporting mods first, bigger turbo second. There is no point is slapping a bigger turbo on when the fuel, intake and exhaust cant handle it.

 

You could do it now but it would be a ton of custom work. New manifold, external wastegate, exhaust...save the money and wait about 8 months there should be some good stuff out...if not trade it in for a wrx or something.

 

besides, its not the size that counts, its how well you work with it.

 

thats small ***** talk sir..do you have a small *****? ..jk ..although it kinda is what you would say to someone if you had a small one lol

 

x2

 

this turbo isnt that bad most Volkswagens upgrade to the ko4 turbo from their ko3 turbos. These things have alot of potential if you check out the tunes that the new mk5 vdubs have youll see the numbers they are putting down. The turbo cobalt will be a beast with a new tune catback and an intake.

 

i wish it was that easy...my stock would be in the garbage already

 

08blackbaltSS, my brother and sister-in-law live in Levittown PA. next time I go visit them I'll have to let you know, I've yet to see one of the new SS's in person.

 

I have yet to see a superchaged SS in the raleigh/durham area.. I have seen ONE n/a SS...

I know they are around here but they seem as rare as hen's teeth.

 

Right, as already mentioned a couple of times, no reason to upgrade the turbo until all the other supporting mods are done, specifically better downpipe, free flowing catback exhaust, intake, etc. It'll take a few months for the aftermarket performance sector to catch up, but I suspect there will be a bolt-on turbo upgrade in the near future. But, with a bigger turbo also means better intercooler (probably front mounted if you go with a really big turbo), injectors, bigger better fuel pump, retuned, etc.

 

best words I've seen yet from someone. The same can be applied to the ss/sc.

basic rule of supercharged cars.... supporting mods first, smaller pullies second. There is no point is slapping a smaller pulley on when the fuel, IAT's, and exhaust cant handle it.

 

Yeah from what I know the turbocharger that is in the LNF, is a twin scroll KD04 turbocharger, That's made by Borg-Warner that makes the KO4 turbo charger for Audi/VW's... However it's a version of the KO4, but not exactly the same... Problem with the LNF in the Cobalt is how it's mounted for a FWD vehicle may not leave a lot of room for larger turbos... I know for the Solstice/Sky they do offer turbo conversion kits for Mitsu 16g, 20g turbos and Garret GT3067R turbos... however the engine is mounted longitudely in those cars because they are RWD, making more room for a larger turbo, but it just came out so we'll see...

 

oh, and the whole tpms thing sucks ass. Chalk up another loss for the ss/tc.

 

What do you mean the tire pressure monitors suck? How is this a loss for the SS/TC?

You do realize that it is now law for all new vehicles to come with a TPMS since the Ford/Firestone thing a few years back...

 

Whether us SS/SC owners want to admit it or not, (I will because I've prefered turbos vs superchargers in smaller engines) The SS/TC is putting out HP #'s and more stock that a Stage 2 SS/SC would have... And hopefully some stage kits do come out in the near future, or by spring of next year, that will be putting the SS/TC @ or over 300hp easily...

 

Note to all.

a larger turbo does not directly translate into more boost.

the k03 on the cobalt is a specific "-12" variant. its got a wheel that B-W spec'd for gm, for the SIDI motor to be as efficient as a thimble sized turbo can be at 18-21psi.

basically the stock car operates around a 2.0PR thus, finding a larger turbo that generates more air flow at that PR will net a more efficient set up over all, due to a larger compressor wheel being more efficient at that pr then the tiny piece on the stock turbo. but lag will increase a bit as well. the nice thing about jump turbo size early on is that your entire engine system become more efficient, you'll pick up power at the same boost levels (as long as you have the injector needed to support it) and you'll be good for more power as you continue to mod the car.

 

Wait, I read it's a KD04, a variant of the KO4.... I'm confused... At least that's what the Solstice/Sky eqipped LNF's have, and doesn't the Cobalt SS/TC have the same engine???

You are saying it's a KO3...

So is it a KDO4, or a KO3???

 

the "-12" wheel is a k04 variant but the frame isnt.

the turbine is a whole 'nother story.

 

Oh... Ok Got ya...

 

i hope everyone still realizes tht the transmission cant handle anymore.....

 

That is not true. Do some reading on what Hahn has done with stock trannies...

 

thats not true... GM underrated there transmissions... seen LSJ with over 430whp and their engine blew before there tranny went

 

Yeah, the trans isn't as much as a weak point as one may think with other cars... And if GM can do anything right, it's their transmissions... Again this is also the same 5spd from GM Sweden and I'd imagine it could handle over 300hp easily...