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Old 07-11-2013, 11:05 AM   #324
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Even with my years of experience with one of the top local turbo guys, I don’t get it above it says the Turbo can make 44lb and you are running 12lb. You have a basically stock V6 yes? Why does it fall short @ 3800, I know this is a totally NB question but I’m more familiar with the Super Chargers.
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Old 07-11-2013, 11:14 AM   #325
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Even with my years of experience with one of the top local turbo guys, I donít get it above it says the Turbo can make 44lb and you are running 12lb. You have a basically stock V6 yes? Why does it fall short @ 3800, I know this is a totally NB question but Iím more familiar with the Super Chargers.
it's on a 300 hp engine stock That turbo was design was a 125hp honda engine running out on the exhaust Side. It's a tiny turbo even with twins. It's a tell tell sign when making early peak torque and hp starts to dip early that they are to small.
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Old 07-11-2013, 11:15 AM   #326
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it's on a 300 hp engine stock That turbo was design was a 125hp honda engine running out on the exhaust Side. It's a tiny turbo even with twins. It's a tell tell sign when making early peak torque and hp starts to dip early that they are to small.
This.
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Old 07-11-2013, 11:16 AM   #327
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This.
Matt did the right thing by stopping where he was just putting to much work on them for little horsepower or no hp by turning them up. What's the oil pressure run on these engines??
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Old 07-11-2013, 11:21 AM   #328
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I think its 60psi
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Old 07-11-2013, 11:24 AM   #329
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I think its 60psi
A restrictor won't hurt that turbo. The one in the turbo isn't enough for this engine I'm sure which is why Matt put one on there I'm sure BW would tell you the same thing. Turbos specs are different for every car.
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Old 07-11-2013, 09:30 PM   #330
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There is no additional oil restrictor on this turbo. As said before there is already a restriction in the actual turbo bearing housing. However, there can be instances where an additional restriction may be necessary as I have been informed. I have not used the EFR's too much, they really are too big of a footprint for the size of the housings/wheels for what we need on the V8 cars. It is great technology, but internal wastegate/internal recirv valve turbos just are huge in a small configuration so tough to fit in engine bays or mid-mounts on most cars. The LFX just has a ton of room that these will fit in.
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Old 07-11-2013, 09:38 PM   #331
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Thanks for the clarification Matt, you were trained well
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Old 07-11-2013, 09:43 PM   #332
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so you wired it backwards to make up for the fact it was installed backwards...


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Old 07-11-2013, 10:52 PM   #333
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WOW! Just read this entire thread..
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Old 07-12-2013, 03:22 AM   #334
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it's on a 300 hp engine stock That turbo was design was a 125hp honda engine running out on the exhaust Side. It's a tiny turbo even with twins. It's a tell tell sign when making early peak torque and hp starts to dip early that they are to small.
I get all that from reading this thread, so does that mean above 3800 its not making 12lb of boost?
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Old 07-12-2013, 07:09 AM   #335
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I get all that from reading this thread, so does that mean above 3800 its not making 12lb of boost?
The dip at 3800-4300 look like tuning could clear up or clutch slippage. To me the turbo gets to small right at 5500-6000. After what I would call a tuning dip it starts gaining power again right to 6000ish. At that point I could assume the turbo can not maintain psi and flat lines or plumits back to stock like hp above 6000.

Looks to be a great blast I like the power band I see in that dyno sheet.. I wojldnt need that last 1000 rpm with that power down low.
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Old 07-12-2013, 09:30 AM   #336
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I get all that from reading this thread, so does that mean above 3800 its not making 12lb of boost?
No it's making boost it make be peaked out I'm not sure. It makes peek power at 5k and stays flat..... Your question was why are they rated for 44 and only run 12.... I don't know where you getting this 3800 but sounds like your looking at the torque line and not the horsepower line Mr. Facepalm.

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Old 07-12-2013, 09:36 AM   #337
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The dip at 3800-4300 look like tuning could clear up or clutch slippage. To me the turbo gets to small right at 5500-6000. After what I would call a tuning dip it starts gaining power again right to 6000ish. At that point I could assume the turbo can not maintain psi and flat lines or plumits back to stock like hp above 6000.

Looks to be a great blast I like the power band I see in that dyno sheet.. I wojldnt need that last 1000 rpm with that power down low.
I don't think your looking at the same sheet I am.....
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Old 07-12-2013, 09:38 AM   #338
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I think the 44 psi was a typo. I think it is supposed to be 14 psi. Maybe Matt can clear that up.
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Old 07-12-2013, 09:41 AM   #339
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No it's making boost??. It makes peel power at 5k and stays flat..... Your question was why are they rated for 44 and only run 12.... I don't know where you getting this 3800 but sounds like your looking at the torque line and not the horsepower line Mr. Facepalm.


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This is the Borg Warner 179150, 6258 EFR. Its maxxed at 44lb which we are exceeding in the 3800rpm range.
:P
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Old 07-12-2013, 09:43 AM   #340
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I think the 44 psi was a type. I think it is supposed to be 14 psi. Maybe Matt can clear that up.

I am sorry guys let me clarify, this turbocharger compressor wheel is just short of 50mm and is rated at 44lb/min maximum flow. This has nothing to do with psi

The problem is that a lot of people do not do the proper airflow calculations, turbochargers are a lot more involved than picking one and welding some pipe to it. You have to look at the turbo compressor map, then map your airflow, and see where it lands in the surge limits (Or outside limits).

I can explain further if anyone would like please let me know. For now, I have some cars to tend to.
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