08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Whats the BEST Turbo Upgrade for an LNF w/ a Quick Spool?

Old Jun 5, 2012 | 11:25 PM
  #26  
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Originally Posted by Scythe_Snake
Sully, I am one of the few people to have graced the three sizes of borg warners. And the statement of no other turbo spooling like the EFR, I am not totally in agreement with. The S252et was an extremely fun turbo that reacted extremely quickly. I could go partial throttle (25%), and let off and the turbo would already be starting to spool.

The EFR setup will also be an amazing setup too when it comes out.
This x10. EFR is a great turbo, no doubt about it, but it's not the endgame win-all solution. My billet 5558 sees 26psi by 4k rpms, holds to red line, makes positive pressure by 2k and it's a journal bearing.

Big turbos are always going to spool slower than a small turbo, ball bearings and lighter materials help, but that only does so much. Internally gated turbos are also susceptible to boost spikes and can be severely limited by backpressure.
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Old Jun 5, 2012 | 11:27 PM
  #27  
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From: buffalo
Originally Posted by 05Slowline
ya from vids of the efr i seen from donkey or lars it def spools faster than the 252 but prob only by a few 100 rpm, its hard to stay out of boost on the 252 i build 5-8psi just driving normal before i know it
Correct, and i wasn't saying its a huge difference but it defiantly spools quicker.
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Old Jun 5, 2012 | 11:32 PM
  #28  
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From: buffalo
Originally Posted by Ch1ck3n
This x10. EFR is a great turbo, no doubt about it, but it's not the endgame win-all solution. My billet 5558 sees 26psi by 4k rpms, holds to red line, and makes positive pressure by 2k and it's a journal bearing.

Big turbos are always going to spool slower than a small turbo, ball bearings and lighter materials help, but that only does so much. Internally gated turbos are also susceptible to boost spikes and can be severely limited by backpressure.
I have seen 26psi by 2900rpms
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Old Jun 5, 2012 | 11:32 PM
  #29  
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Originally Posted by Ch1ck3n
This x10. EFR is a great turbo, no doubt about it, but it's not the endgame win-all solution. My billet 5558 sees 26psi by 4k rpms, holds to red line, makes positive pressure by 2k and it's a journal bearing.

Big turbos are always going to spool slower than a small turbo, ball bearings and lighter materials help, but that only does so much. Internally gated turbos are also susceptible to boost spikes and can be severely limited by backpressure.
I must have something wrong then cuz my billet 5557 JB spools 25 psi at like 4400-4500 (i just checked...it used to spool quicker as stated above)
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Old Jun 5, 2012 | 11:37 PM
  #30  
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Originally Posted by FrossB
I must have something wrong then cuz my billet 5557 JB spools 25 psi at like 4400-4500 (i just checked...it used to spool quicker as stated above)
What A/R turbine housing are you running? Check for boost/exhaust leaks. Check your wheel for shaft play too, there should be a little bit just cause its a journal bearing, but Precision did have a crummy batch of CHRA's run through not too long ago. Burning oil at all?
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Old Jun 5, 2012 | 11:39 PM
  #31  
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My 5857 spools 24psi by 4.5k its dbb with billet wheel .63 ar as well.
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Old Jun 5, 2012 | 11:47 PM
  #32  
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lol 26 psi at 2900 rpm wow. How can you compete with that? Unless youre still stock turbo lol
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Old Jun 5, 2012 | 11:51 PM
  #33  
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Originally Posted by donkeyballs
I have seen 26psi by 2900rpms
A 6758 is also smaller than a 5558.
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Old Jun 5, 2012 | 11:56 PM
  #34  
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From: buffalo
Originally Posted by Ch1ck3n
A 6758 is also smaller than a 5558.
Exactly, but i was saying its a great DD turbo cause it spools so quick. Matt made over 500whp/wtq with it so size doesn't always matter
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Old Jun 6, 2012 | 12:10 AM
  #35  
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im have .63 A/R. And i just had the thing rebuilt like 4 months ago. I bought it new, sucked a rock into it, and had it rebuilt by Precision. No noticable amount of oil burning. I did go from a hahn catback w/ muffler delete to a side exit and that is when i noticed the change in spool time
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Old Jun 6, 2012 | 12:14 AM
  #36  
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Originally Posted by Ch1ck3n
A 6758 is also smaller than a 5558.
Originally Posted by donkeyballs
Exactly, but i was saying its a great DD turbo cause it spools so quick. Matt made over 500whp/wtq with it so size doesn't always matter
No doubt. But they are also different turbos with different goals and considerations. I chose a journal bearing over ball because I wanted the easier and inexpensive option if I ever have to rebuild, knowing that It would be a little slower on the boost. But I still dd my car and it fairs pretty well. And its plenty quick on just 20psi.
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Old Jun 6, 2012 | 12:20 AM
  #37  
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Originally Posted by FrossB
im have .63 A/R. And i just had the thing rebuilt like 4 months ago. I bought it new, sucked a rock into it, and had it rebuilt by Precision. No noticable amount of oil burning. I did go from a hahn catback w/ muffler delete to a side exit and that is when i noticed the change in spool time
Just remember, boost is a measure of restriction. Your exhaust is flowing the same amount through a larger, less restrictive pipe so it's losing velocity and heat energy, which will slow your spool, but your top end definitely benefits.
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Old Jun 6, 2012 | 12:24 AM
  #38  
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s256et kit from ZZP looks pretty badass
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Old Jun 6, 2012 | 12:39 AM
  #39  
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Originally Posted by Ch1ck3n
Just remember, boost is a measure of restriction. Your exhaust is flowing the same amount through a larger, less restrictive pipe so it's losing velocity and heat energy, which will slow your spool, but your top end definitely benefits.
makes sense...hmm might have to do something about that then lol
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Old Jun 6, 2012 | 01:22 AM
  #40  
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From: el paso
What do u guys think about treadstone, I think they use a gtx Turbo in their kit
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Old Jun 6, 2012 | 01:41 AM
  #41  
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Treadstone is an awesome kit...ask me how i know

They offer many different turbo choices as well. Precision, Turbonetics, Garrett, etc.
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Old Jun 6, 2012 | 06:52 AM
  #42  
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Originally Posted by FrossB
makes sense...hmm might have to do something about that then lol
The fact your turbo spools slower could just mean your engine is pulling in some serious airflow in the low and midrange and the compressor just isn't keeping up till a little later
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Old Jun 6, 2012 | 06:59 AM
  #43  
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I also just have a filter directly on the turbo so there isn't a lot of restriction there
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Old Jun 6, 2012 | 09:09 AM
  #44  
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Originally Posted by donkeyballs
I have seen 26psi by 2900rpms
See, Thats exactly what I'm talkin about! So this EFR is pretty much what I'm looking for it seems like, Donkey, How did you get one already and how much are they gonna be approx and any time frame of when these will be released to all of the public? *edit, Donkey how much WHP is your Balt at with your EFR Set-up?

Last edited by Sully20; Jun 6, 2012 at 09:15 AM.
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Old Jun 6, 2012 | 09:12 AM
  #45  
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Originally Posted by elecblue06
somethings either mechanically wrong or your PE / wastegate duty tables are set to make it spool slower




the 252et doesn't bolt to the stock manifold.. all the things I listed do
Ahh, Ok so its not really a "True" Bolt-On then....Hmmm, I was trying to do some research on some Turbo's and Information seems really scarce unless I'm looking in the wrong places, But on ZZP's web site I looked up the 252et, 256 etc and they have like No Info on them, Like Spool time, etc. Where could I find Info like this?
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Old Jun 6, 2012 | 10:07 AM
  #46  
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They do have spool times on the 252 and 256, read! Not to mention this question has been asked 9million times. There are very few true bolt on turbos out there, fewer that are worth the money. Also if you are bolting on a turbo to the manifold, removing and installing a different manifold is the least of your hassles. Takes literally 5-7 minutes to swap the manifolds. Regardless if you go Pwerks, Treadstone, or ZZP... manifolds changes are easy business when you already have the turbo off.



Learn to internet better, here is ZZPs additional info on the turbos


Turbo choices:
S252 turbo
-Spool close to stock and reaches full boost by 2800 rpm
-Typical 400WHP on gas, 425WHP on E85. Max power ~450WHP
-recommended 25psi max on 93 octane
-Very good road coarse or daily driver turbo with a close to stock feel. Adds ~100WHP over stock turbo
S256 turbo
-Spools by 3000 rpm
-Typical 420WHP on gas, 450WHP on E85. Max power ~500WHP
-recommended 26psi max on 93 octane
S259 turbo
-Spools by 3300 rpm
-Typical 440WHP on gas, 500WHP on E85. Max power ~550WHP
-recommended 27psi max on 93 octane
S262 turbo
-Spool 3800 rpm
-Typical 460WHP on gas, 550WHP on E85. Max power ~600WHP
-recommended 28psi max on 93 octane
-Not recommended for streetable daily driving. Car is very slow until nearly 4k rpm

-Custom turbo setups for builds needing even more. Typically requiring custom 3.5" downpipe and chassis modification for fitment.

What our customers are saying:

Just a drivability update for everyone. From a daily driver aspect the car is perfect. On my low boost grocery getter tune its making about 10-12 pounds of boost and its rather responsive still. If my inner ricer wants to hear the loud ass external dump or blow off valve, I just get on it a little bit and then let off and I get my kicks.

From a performance aspect, OMFG is all I can say. From a 40 roll, I break loose the tires with easy.....and it PULLS hard as all get out while spinning. But then with a shift to third the car catches traction and moves like a bat or two out of hell. Forget pinning you to your seat, it pulls you through the seat. I did a fly by one of my friend's houses while they were working on his Evo, and they said that they didn't even know who it was because it soudned so deep and different than before. They all want a ride in it now.

Overall I am 100% satisfied with the car. Aside from a few aesthetic things I want to do with the car, the car is literally 100% done. Performance wise it has everything I want, visually the car is solid, and its streetability is something caparable to 100% stock so far. I've put a few thousand on it since I've had the kit as well.

Matt M and Ryan@zzp stayed after their workshifts were over not once, but twice (and hours after at that), and Matt even gave me his personal number for me to ask any questions or trouble shoot for one reason or another. I am 100% satisfied, and anyone who wants to work with ZZP, I'd tell them they are working with some good people.
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Old Jun 6, 2012 | 10:19 AM
  #47  
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The gtx line is awesome I would love to run a gtx3076r
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Old Jun 6, 2012 | 11:00 AM
  #48  
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Originally Posted by elecblue06
somethings either mechanically wrong or your PE / wastegate duty tables are set to make it spool slower




the 252et doesn't bolt to the stock manifold.. all the things I listed do
Yea I eliminated boost leak as a possible cause. Its not the wga duty cycle either as im on a MBC. Only thing I can think of is the wga flapper isn't seating all the way or I have a pre turbo exhaust leak.
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Old Jun 6, 2012 | 11:02 AM
  #49  
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Originally Posted by Dart_SI
Yea I eliminated boost leak as a possible cause. Its not the wga duty cycle either as im on a MBC. Only thing I can think of is the wga flapper isn't seating all the way or I have a pre turbo exhaust leak.
JB weld!
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Old Jun 6, 2012 | 11:09 AM
  #50  
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If I just jbweld the wga shut I could hit like 100psi and be faster than everybody...
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