Topic: Will a GT3076R turbo work on a GXP

[IBDRINKEN]

I was thinking about upgrading the turbo to a GT3076R and was wondering how much work do you think it would take to get this to fit on the GXP. I was looking at the DDM turbo but it just seems small IMO. Any input is much appreciated.

[2.4solstice06]

Well, you'd need a different manifold to start, different downpipe, different hot side charge pipe, tuning and I'm sure I'm forgetting something

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[1LILNDN]

I think it will need a bigger Inercooler to . the stock inercooler I think wouldn't keep up .

[IBDRINKEN]

If I was to do this I would go to DDM but curious as to how much work it would be. I would think would have to make a manifold and all of the lines and what nots.

[2.4solstice06]

I would think it would require pretty much the same amount of work as turbocharging an na car

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[Gentleman Jack]

What sort of power are you looking for?

[Kelu]

IBD: I'm running GT3071R for more than 1 year and I like it, if I'm not wrong compressor side is very close to 3076 if not identical but with a smaller hot side.
Initially was installed with a manifold adapter and later with a custom tubular manifold.

My advice, if you want GT3076 on our 2L, just get the GTX version or it will be laggy. If you want more info we can talk at Mod Meet 

[DeepBlueGXP]

if you're planning anything bigger than the DDM turbo, you'll need to beef up the engine internals.

BTW, I believe the DDM turbo gives you about 375hp at the wheels.

[Dave@DDMworks]

IBD: I'm running GT3071R for more than 1 year and I like it, if I'm not wrong compressor side is very close to 3076 if not identical but with a smaller hot side.
Initially was installed with a manifold adapter and later with a custom tubular manifold.

My advice, if you want GT3076 on our 2L, just get the GTX version or it will be laggy. If you want more info we can talk at Mod Meet 

Even the GTX version of the 3076 is going to be kinda laggy on the 2.0L. Although that is what we ran on the 700hp twincharged atom, and it worked well, but the supercharger helped with any lag. It really depends on how much power you want to make though.

[Kelu]

Even the GTX version of the 3076 is going to be kinda laggy on the 2.0L. Although that is what we ran on the 700hp twincharged atom, and it worked well, but the supercharger helped with any lag. It really depends on how much power you want to make though.

I agree, I didn't want to scare him off from the beginning saying that 3076 is too lagging, depends on what application he needs that turbo.
I don't know other application than drag racing when a GT3076 would be good for our LNF. For anything else, a smaller turbo will be more appropriate.

[IBDRINKEN]

Even the GTX version of the 3076 is going to be kinda laggy on the 2.0L. Although that is what we ran on the 700hp twincharged atom, and it worked well, but the supercharger helped with any lag. It really depends on how much power you want to make though.

I def don't want any lag or try to limit it as much a a possible.

What sort of power are you looking for?

Prob around mid 400 or so. I like the DDM turbo but if I want more power then the Itwill max out the turbo even if u go the meth or nos route

[Gentleman Jack]

Are you ok sacrificing daily drivability for power?

[IBDRINKEN]

Are you ok sacrificing daily drivability for power?

That's a good question you have. Do you not think it could be a daily driver and around 425 hp.

[Gentleman Jack]

Possible! Yes. But it will be all about where the power is. The bigger turbos generally have more power, and with the more lag. Kelu has his set up for drag racing and he can drive it on the street, but if I recall, it's not ideal.
See if you can ride along in some cars at the mod meet. You may change your mind.

For me, I don't care how far past 100 mph my car will go. I do care how fast it will get to 100 mph, and how fast it will go from 20-80 or 0-40. That's where I drive, and it's where I have fun. Is it nice to be able to go 140? Sure.  But if Im choosing, I pick acceleration over top speed.

[IBDRINKEN]

Possible! Yes. But it will be all about where the power is. The bigger turbos generally have more power, and with the more lag. Kelu has his set up for drag racing and he can drive it on the street, but if I recall, it's not ideal.
See if you can ride along in some cars at the mod meet. You may change your mind.

For me, I don't care how far past 100 mph my car will go. I do care how fast it will get to 100 mph, and how fast it will go from 20-80 or 0-40. That's where I drive, and it's where I have fun. Is it nice to be able to go 140? Sure.  But if Im choosing, I pick acceleration over top speed.

That's a very good point. I'm the same way but I was thinking that I wouldn't want to replace the turbo of I want more power. But I know when I Had my yellow GXP it was tuned by DDM on meth and put down 320 on stock turbo. So I'm pretty sure I could very close to my goal with that and I could throw some nos on it as well since I was talking about that right before with DDM before I sold it. So the DDM upgrade might be the way to go in the long run

[GXP_Matt]

The DDM upgrade is plenty powerful for most people and seems to be a solid upgrade that avoids custom exhaust manifolds/ downpipes, etc.  If you do need more power but want to keep driveability and near stock spool, the 6758 EFR will do 450 whp as long as you can get enough fuel into the engine!  ZZP's turbine housing allows use of the stock manifold and downpipe and is popular in the Cobalt community.  A custom actuator bracket is required for use in a Kappa, but is just a matter of some sheet metal fab work.

[IBDRINKEN]

Realistically I would like around anything over 400 hp and I would be happy

[LatinVenom]

I would also look into the EFR 6758. Werks has`a tubular manifold for it that is very well build.
Maybe DDM can put something together for you with the above parts.

[Arabas]

Possible! Yes. But it will be all about where the power is. The bigger turbos generally have more power, and with the more lag. Kelu has his set up for drag racing and he can drive it on the street, but if I recall, it's not ideal.
See if you can ride along in some cars at the mod meet. You may change your mind.

For me, I don't care how far past 100 mph my car will go. I do care how fast it will get to 100 mph, and how fast it will go from 20-80 or 0-40. That's where I drive, and it's where I have fun. Is it nice to be able to go 140? Sure.  But if Im choosing, I pick acceleration over top speed.

Good point, which means high torque available from low rpms. Which brings us to internals as DB said and stressing the axle. But for sure these can be resolved with a good custom tune on the dyno and the right set up. Looking forward to your project

[SKY888]

I was thinking about upgrading the turbo to a GT3076R and was wondering how much work do you think it would take to get this to fit on the GXP. I was looking at the DDM turbo but it just seems small IMO. Any input is much appreciated.

I used to have GT3076r during the year of 2008 
http://www.skyroadster.com/forums/f2/sky888s-373-whp-358-ft-lb-sky-redline-28188/

SKY888's 373 whp & 358 ft-lbs Sky Redline!


And REMEMBER during that time, tuning is very limited.......unlike these days.   So dont be disappointed with the numbers shown here.  You can probably easily go 400whp +++ with the 3076r with the more advanced tuning tools and HPT accessiblity these days. 
yes, gt3076r can be done on your gxp.

With a GREAT tune, a 400whp gxp w/GT3076  w/ stock internals might last and have no issues.   When I ran my 3582r at 400whp, I had stock internals and never had any issues with it as a daily driver.   The tune was very conservative, and the stock internals lasted
But I really think that your stock clutch needs to be upgraded to a Spec stage 3+ clutch kit...since your stock clutch will not be able to handle the higher tq.


I used the stock exhaust manifold....but BTF machined an adapter to the turbo will be compatible to the exhaust manifold.  He also machined the turbine housing (added a v-band connection) so it can be compatible to the 3" downpipe that he provided. 
I believe my gt3582r spools at aroud 4500 rpm.........so the gt3076r spools a few hundred rpms faster (maybe around 4200rpm).   Sorry I forgot.....its been 5 yrs...lol


I drove it as a daily driver, and had no issues with it.


Just make sure the hot side is around .63 AR.....and dont go with the bigger .80 AR for the gt3076r.   The size of the hot side will make a difference in spool.   So the smaller it is....the faster it spools....but of course the downside is, less HP it can make compared to a bigger AR.


the gt3076r kit includes:
kit consists of the following:

1) Ball Bearing Garrett GT3076R w/custom Tial SS housing in your choice of A/R
1)Mild steel Catless downpipe (v-band no gasket at the turbo to leak)
1)Black 38mm Tial wastegate w14.7psi spring
1)Bosch recirculator valve
1)4" intake pipe with enourmous cotton-gause filter (for C6 vette)
2)6mm oil drain bolts
1)6mm drill bit
1)braided oil feed line
2) 4" hoseclamps



good luck!

[IBDRINKEN]

I remember following that thread back when. How was the turbo lag on it

[SKY888]

I believe my gt3582r spools at aroud 4500 rpm.........so the gt3076r spools a few hundred rpms faster (maybe around 4200rpm).   Sorry I forgot.....its been 5 yrs...lol


I drove it as a daily driver, and really wasn't bothered with the delayed spool compared to K04.

Just make sure the hot side is around .63 AR.....and dont go with the bigger .80 AR for the gt3076r.   The size of the hot side will make a difference in spool.   So the smaller it is....the faster it spools....but of course the downside is, less HP it can make compared to a bigger AR.

[SKY888]

to be honest, the DDM turbo upgrade is great upgrade, but again, very limited hp. 

I believe you want a bit higher than 400whp, so the DDM turbo kit might not be what you're looking for.


if you want fast spool and higher whp....those smaller EFR turbos are the way to go.   They will outspool the GT3076r turbo and will have the same whp output.

Ask DDM dave, he can customize you an EFR turbo for the stock manifold.
And just have him tune it to 400whp w/ stock internals

[elff]

Im going to contradict some of that
The 2871 on the same fuel is faster than the smaller EFR
I have posted my HPT logs of my 60-100 times and I am within .2 seconds of the larger EFR but at a cost of roughly $2500 less
And
Faster than the smaller EFR

My 60-100 times are under 4 seconds.   So the 2871 kit puts you in the same speeds as $100k+ super cars

Its got useable HP for a killer price and the rpm range of the spool keeps the car in a range that does not make it annoying to drive on the street.

[elff]

There is one other HUGE downside of the EFRs
Availability
And
They have had some reliability issues compared to the Garret turbos.

If they break, there is no guarantee of you getting a replacement within 6 months. 
This is because Indy keeps buying all of them.

As cool as they sound.
Id take a 2871 kit over an EFR any day of the week
The price difference is the cost of a custom head
Or
Carillo rods and Wisco pistons.