LE5 turbo setup
#1
Junior Member
Thread Starter
LE5 turbo setup
I am building a turbo setup for a 2006 Cobalt SS 2.4 LE5. I have called and emailed Alphafab, Hahn, and ZZP, they all suck at customer service. So it appears that I will be putting my own system together. I have a pretty good handle on what turbo I want. It will be a Garrett GT3071R, 56 trim, .5 A/R. (350 hp at 7000 rpm, no plans to ever go much higher, need it to spool quick for as much low-end as possible.) My main questions now are:
- Where to buy the actual turbo?
- Where should I look for an exhaust manifold?
- What injectors use the same connectors as my stock injectors? (I know how to calculate size.)
- I plan to fabricate my own intake manifold. Is there a bigger DBW TB that uses the same voltage sweeps as the stock TB?
#2
Senior Member
iTrader: (13)
I am building a turbo setup for a 2006 Cobalt SS 2.4 LE5. I have called and emailed Alphafab, Hahn, and ZZP, they all suck at customer service. So it appears that I will be putting my own system together. I have a pretty good handle on what turbo I want. It will be a Garrett GT3071R, 56 trim, .5 A/R. (350 hp at 7000 rpm, no plans to ever go much higher, need it to spool quick for as much low-end as possible.) My main questions now are:
- Where to buy the actual turbo?
- Where should I look for an exhaust manifold?
- What injectors use the same connectors as my stock injectors? (I know how to calculate size.)
- I plan to fabricate my own intake manifold. Is there a bigger DBW TB that uses the same voltage sweeps as the stock TB?
#3
Junior Member
Thread Starter
ZZP flat-out, in plain English, told me that they do not have time for me and will not speak to me on the phone. Alpha will not put someone on the phone who knows WTF they are talking about and it takes them weeks to reply to emails. Hahn expressed some interest but also will not put any knowledgeable person on the phone. Also takes weeks between emails from them. Between the 3 companies they have held my project up for about 3 months and I'm done waiting for incompetent asshats to take my money. If its this hard to buy something from them I can only imagine how difficult it will be to get service once they already have my money. I honestly do not see how any of these companies survive. I own 3 companies, the oldest of which is 10 years old now. If I had customer service twice as good as Hahn, Alpha, or ZZP I wouldn't have made it past my first year.
#4
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iTrader: (13)
ZZP flat-out, in plain English, told me that they do not have time for me and will not speak to me on the phone. Alpha will not put someone on the phone who knows WTF they are talking about and it takes them weeks to reply to emails. Hahn expressed some interest but also will not put any knowledgeable person on the phone. Also takes weeks between emails from them. Between the 3 companies they have held my project up for about 3 months and I'm done waiting for incompetent asshats to take my money. If its this hard to buy something from them I can only imagine how difficult it will be to get service once they already have my money. I honestly do not see how any of these companies survive.
#5
Junior Member
Thread Starter
ZZP does not offer phone contact:
Contact Us
Anyway, at this point I wouldn't do business with them.
Contact Us
Anyway, at this point I wouldn't do business with them.
#6
Senior Member
iTrader: (5)
I would say then, at this point your best bet is to take the car to a performance shop so they can build a turbo manifold for you. As for the turbo itself, you should be able to find it online or ordering through a performance shop (expensive).
injectors, I think, someone correct me if im wrong. 42lbs needs an adapter and 60lbs should plug in... I think im running the old 39lbs from zzp without adapters.
4. I don't know.... lol
injectors, I think, someone correct me if im wrong. 42lbs needs an adapter and 60lbs should plug in... I think im running the old 39lbs from zzp without adapters.
4. I don't know.... lol
#7
Junior Member
Thread Starter
I would say then, at this point your best bet is to take the car to a performance shop so they can build a turbo manifold for you. As for the turbo itself, you should be able to find it online or ordering through a performance shop (expensive).
injectors, I think, someone correct me if im wrong. 42lbs needs an adapter and 60lbs should plug in... I think im running the old 39lbs from zzp without adapters.
4. I don't know.... lol
injectors, I think, someone correct me if im wrong. 42lbs needs an adapter and 60lbs should plug in... I think im running the old 39lbs from zzp without adapters.
4. I don't know.... lol
#9
Ottp makes a stainless manifold but zzps is a little nicer. Worth the cash imo.
If you only want 350 hp you could run a 2871 and heave a ton of low end. Bnr sells a 2871 that bolts onto the stock lnf manifold which is cheap to buy on this site from someone.
If you only want 350 hp you could run a 2871 and heave a ton of low end. Bnr sells a 2871 that bolts onto the stock lnf manifold which is cheap to buy on this site from someone.
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patooyee (09-28-2015)
#10
Junior Member
Thread Starter
Again, this isn't going in a Cobalt, a car, or even anything with a body. Space is not a constraint. Surely SOMEONE makes an exhaust manifold for an Ecotec engine that bolts to a turbo???? It doesn't have to be for a Cobalt, just Ecotec.
NOW we're getting somewhere!
Who is OTTP? Link?
Who is BNR? Link to that also please?
Like I said, I can fab just about anything, work on just about anything, build absolutely anything, but when it comes to sport compact aftermarket I have ZERO submersion. If you asked me where to buy just about anything for an LS2 I could tell you a number of places. But if you asked me where to buy a valve cover for an Ecotec I would draw a blank. Even if you don't think it helps me, list of some Ecotec performance companies. I'll go check them out and see if they have anything constructive.
Who is OTTP? Link?
Who is BNR? Link to that also please?
Like I said, I can fab just about anything, work on just about anything, build absolutely anything, but when it comes to sport compact aftermarket I have ZERO submersion. If you asked me where to buy just about anything for an LS2 I could tell you a number of places. But if you asked me where to buy a valve cover for an Ecotec I would draw a blank. Even if you don't think it helps me, list of some Ecotec performance companies. I'll go check them out and see if they have anything constructive.
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patooyee (09-28-2015)
#12
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patooyee (09-28-2015)
#16
Junior Member
Thread Starter
#17
Just to vouch for Ottp, it may take a little longer to get stuff but josh does his best to cater to your needs and make sure your satisfied. He's a one many operation but his customer service is A+
#18
Junior Member
Thread Starter
Why do you say too much? Both the 2871 and 3071 were recommended by the Garrett Adviser but my air flow and PR's fall smack dab in the efficiency island on the 3071 and are all the way out at the edges on the 2871. I'l post pics in the morning if you like. I would be interested to see your interpretation of the maps in either case ...
#19
Junior Member
Thread Starter
The 28's aren't as far out as I recall them. I must have been inputting something wrong initially. But the 30's don't look bad either. Interested to hear others' takes.
Inputs:
Parameter Value
Ambient Air Temp (°F) 90.0
Barometric Pressure (psi) 14.61
Displacement 2.4 L
Crank Horsepower Target 350
Number of valves 5
Volumetric Efficiency 95.0%
Fuel Type Pump gas
Air/Fuel Ratio 11.5
BSFC (lb/HP-hr) 0.55
Intercooler null
Effectiveness 0.7
Pressure drop (psi) 1.0
Mid Range RPM 5300
Peak Power RPM 7000
No of Turbos 1
Results:
Parameter RPM 1 RPM 2
Pressure Ratio 2.06 2.06
Intake Manifold Temp(°F) 142.07 142.07
Crank Horsepower Actual(hp) 264.38 349.18
Airflow corrected (lbs/min) 28.69 37.9
Boost Gauge Pressure (psi) 14.5 14.5
Crank Torque (lb-ft) 261.98 261.98
Inputs:
Parameter Value
Ambient Air Temp (°F) 90.0
Barometric Pressure (psi) 14.61
Displacement 2.4 L
Crank Horsepower Target 350
Number of valves 5
Volumetric Efficiency 95.0%
Fuel Type Pump gas
Air/Fuel Ratio 11.5
BSFC (lb/HP-hr) 0.55
Intercooler null
Effectiveness 0.7
Pressure drop (psi) 1.0
Mid Range RPM 5300
Peak Power RPM 7000
No of Turbos 1
Results:
Parameter RPM 1 RPM 2
Pressure Ratio 2.06 2.06
Intake Manifold Temp(°F) 142.07 142.07
Crank Horsepower Actual(hp) 264.38 349.18
Airflow corrected (lbs/min) 28.69 37.9
Boost Gauge Pressure (psi) 14.5 14.5
Crank Torque (lb-ft) 261.98 261.98
Last edited by patooyee; 09-29-2015 at 09:45 AM.
#20
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patooyee (09-29-2015)
#23
Junior Member
Thread Starter
Just spoke to BNR. He takes the stock K04 LNF turbine housing and machines it to fit the 2871. If the LNF manifold truly fits the LE5 this seems like the obvious way to go for me. BNR's prices are very reasonable as well.