Precision 6266BB vs BW EFR 8374 !! Dyno graphs inside!!
03-30-2012, 08:15 AM
#1
Precision 6266BB vs BW EFR 8374 !! Dyno graphs inside!!
Here is another test done by Larry at Sound Performance!! This is the Precision 6266BB vs the BW EFR8374.
As per Larry @ Sound:
""I tested these turbos on the same car. 3.4L 10-1 compression supra 2JZ. The BW spooled 70 RPMs faster than the PTE but was down almost 40 RWHP. Precision Turbo 6266DBB is a much better option and when you consider that the list price on the BW is $1100 more than the PTE, it is a no brainer!
Great job guys! I always knew I was selling the best and finally had my chance to prove to the world that I was.
...The BW turbo was a divided turbo on a divided twin scroll header. The PTE was an undivided turbo!...
...Air temps were 65 at the beginning of the pulls and 130 at the end of the 6266 pull. On the BW the air temps hit 136. Not a huge difference. The EBP hit 64 on the 6266 and 69 on the BW. The 6266 had a .81 but I am not sure about the BW...
...both tests were with the same external WG although I pretty much had it clamped closed! I tried a .96 on the PTE and did not pick up any hp, only lag! We are clearly out of compressor wheel, not an EBP issue....
...BW Compressor 62.6/83mm, turbine is 74mm with 1.05 a/r divided housing. PTE is also 62mm compressor wheel, not sure on the other dimension. 66mm turbine wheel with .81 a/r undivided turbine housing...
As per Larry @ Sound:
""I tested these turbos on the same car. 3.4L 10-1 compression supra 2JZ. The BW spooled 70 RPMs faster than the PTE but was down almost 40 RWHP. Precision Turbo 6266DBB is a much better option and when you consider that the list price on the BW is $1100 more than the PTE, it is a no brainer!
Great job guys! I always knew I was selling the best and finally had my chance to prove to the world that I was.
...The BW turbo was a divided turbo on a divided twin scroll header. The PTE was an undivided turbo!...
...Air temps were 65 at the beginning of the pulls and 130 at the end of the 6266 pull. On the BW the air temps hit 136. Not a huge difference. The EBP hit 64 on the 6266 and 69 on the BW. The 6266 had a .81 but I am not sure about the BW...
...both tests were with the same external WG although I pretty much had it clamped closed! I tried a .96 on the PTE and did not pick up any hp, only lag! We are clearly out of compressor wheel, not an EBP issue....
...BW Compressor 62.6/83mm, turbine is 74mm with 1.05 a/r divided housing. PTE is also 62mm compressor wheel, not sure on the other dimension. 66mm turbine wheel with .81 a/r undivided turbine housing...
03-30-2012, 11:55 AM
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Re: Precision 6266BB vs BW EFR 8374 !! Dyno graphs inside!!
weird that the bw has a bigger turbine, and logged more back pressure. bigger turbine, but spooled pretty much the same as the pt. but more pack pressure. interesting. what am I not seeing here.
03-30-2012, 01:02 PM
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Re: Precision 6266BB vs BW EFR 8374 !! Dyno graphs inside!!
I believe the 74mm of the Borg Warner represents the turbine inducer, and the 66mm of the Precision refers to its exducer. Does anyone know the size of the turbine exducer on the 8374?
03-31-2012, 06:28 AM
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04-02-2012, 06:21 PM
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Re: Precision 6266BB vs BW EFR 8374 !! Dyno graphs inside!!
I am having trouble seeing it...
I would say this is more a test of how much the turbo could spin more so than how well the compressor wheel flowed. The boost fell off on the EFR well before it even had a chance to make peak power. On a car with no wastegate I could see this being an issue but it would have been a better test to see where the turbo was big enough to hold the boost through the powerband.... like at 25-30psi.
I would say this is more a test of how much the turbo could spin more so than how well the compressor wheel flowed. The boost fell off on the EFR well before it even had a chance to make peak power. On a car with no wastegate I could see this being an issue but it would have been a better test to see where the turbo was big enough to hold the boost through the powerband.... like at 25-30psi.
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