Re: Talk to me about Holset Turbos...
 

do you know how? according to the 2 maps you posted they are pretty similar actually, at the same pressure ratio and efficiency rating the t4 is slightly ahead of the 60 trim t3 but only maybe 2llbs/min over, nothing crazy. the main difference i see is that the t3 is less likely to surge wich is actually a good thing. if all your doing is comparing the max volume that they go to on the map for the lines they give your an idiot. you do realize that the t4 map plots all the way out to 50 percent and the t3 map stops at 65. do you know what those efficiency lines are there for dont you?

Re: Talk to me about Holset Turbos...
 

The T3 map is of a 60 trim not your run of the mill .63/.60 and no I've never taken the time to learn to read a compressor map well.


JP

Re: Talk to me about Holset Turbos...
 

Might as well learn...
http://forums.bimmerforums.com/forum...d.php?t=258035

Re: Talk to me about Holset Turbos...
 

Thanks man.


JP

Re: Talk to me about Holset Turbos...
 

and the t04b map he showed you is a pretty shitty compressor compared to the t04e's. try lookin at a 50 or 60 trim t04e if you want to get close to seeing what a real compressor looks like.