Originally Posted by
jontysafe
Mostly speaking to the tech guys at Full Race when I was choosing my turbo.
plus you only have to look at the differing turbine sizing between the two.
oh, well.. apart from the 4 reasons i gave before there is also this clip from an email conversation i had with someone who should know....
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Paul,
The best way to compare the two turbos is Matchbot. I started the link below for you.
http://www.turbos.borgwarner.com/go/O5KDPT
Please go there and adjust the input parameters to match your set up. Once you have done that you can use the drop down menu to compare the two different compressor stages.
The 7064 will allow more pressure ratio early in the RPM range based on the positioning of the surge line.
You will see this in Matchbot.
Other things that are super critical to seeing earlier boost response is to have a twin scroll turbine housing and a divided exhaust manifold timed correctly to take advantage of pulse energy.
This combination will improve initial boost and transient boost response by as much a 15%.
Please tell me what performance distributer you are buying from?
Thanks,
Brian Rhinehart
BorgWarner
IAM Tech Service
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anyway, its nearly fitted so we shall see