60 trim 63a/r, at what psi is it most efficient for this trubo?

 

bump for you...I'd like to know as well. I've got a 57 trim with .63/.60 with wet floating ball bearings.

 

Boosted Hybrid told me

"The 57 trim is a great compressor since it is efficient at 8psi, as well as 20psi. The greatest efficiency range (most power to be made) is going to be in the 12-16psi range for the 57 trim. "

 

What about 60 trim 63a/r?

Anyone know? Boosted Hybrid??

 

Ha Ha - Ur post got jacked...

 

I wanna know too , ill opm this link to him this is the same turo i am runnig and Boostedhybrid is running now too insted of the 60-1

 

what about 60 trim .82ar? what psi would that be best at? Thanks.

 

I would like to know also since i have the same turbo.

Brian

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by T-Blaze &raquo;</TD></TR><TR><TD CLASS="quote">Ha Ha - Ur post got jacked...</TD></TR></TABLE>

LOL, ill give u a bump .

 

And i will give you a bump^^


Brian

 

How about the 57 trim 48 ar???

Seriously, there's gotta be a table of stats sumwhere about this info???

 

prob garret, but i dunno how to read those damn things

 

Oi you!! Stop jacking my post! Before I blaze u wit my flames!!

 

Dawg - The only flames u blaze me wiv are the ones from ur own rear muffler.... That **** is like over 1000whp at 2psi.!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by T-Blaze &raquo;</TD></TR><TR><TD CLASS="quote">Dawg - The only flames u blaze me wiv are the ones from ur own rear muffler.... That **** is like over 1000whp at 2psi.!!</TD></TR></TABLE>


Hahahahahahah

lol

Brian

 

It's nice to see you guys understand our 'poor' UK sense of humour...

 

Back up!

Brian

 

To answer everyone's questions about the efficiencies of the compressor maps, here is the two graphs of the 57 trim and 60 trim:

57 Trim:



60 Trim:



Assuming the following:

Boost: 6psi, Intercooler Pressure Drop: 1psi, Engine RPM: 8200, Post Intercooler Temp: 130 degrees, Displacement 110 CI (1.8L), Volumetric Efficiency: 90% and Underhood temps: 85 degrees

You get Pressure Ratio: 1.476 and Airflow: 21.05

The Pressure Ratio is the Y-axis, The Airflow is the X-axis. Plot these two points on both graphs.

Assuming the following:

Boost: 22psi, Intercooler Pressure Drop: 1psi, Engine RPM: 8200, Post Intercooler Temp: 130 degrees, Displacement 110 CI (1.8L), Volumetric Efficiency: 90% and Underhood temps: 85 degrees

You get Pressure Ratio: 2.56and Airflow: 37.32

Plot the Pressure Ratio and Airflow on both graphs.

You'll see that the 57 trim is a bit more efficient than the 60 trim at lower psi, while the 60 trim owns the 57 trim on high boost. The pressure Ratio's and Airflow numbers I gave you are estimates, so if the ambient temperature changes or atmospheric pressure changes (altitude) you would have to take that into account in the calculations.

I prefer the 60 trim maps anyday over the 60-1. Using the same numbers plot them on the 60-1 Graph:



You can see that the compressor really doesnt get efficient till 14-15psi.

 

i can't make out what those numbers are for the 57 trim map. anyone???

 

Thanks for chiming in Jeff, your knowledge is always appreciated.

 

So if i read the .60 trim right, it is saying that the optimum is about 20-25 psi then right??

Brian

 

Good info Jeff

 

And heres the 50 trim for more comparison...
From what I can tell, The 50 trim seems more desireable over the 57 trim, even at high boost.

 

You are correct that the 50 trim has a better compressor map, but it does not flow nearly as much cfm as the 57 and 60 trim. The 57 trim flows 49~50lb/min, while the 60 trim flows 52lb/min. I believe the 50 trim flows 42lb/min. Choosing a compressor map is about flow and efficiency. Its a balance choosing a compressor. In the past (before Garret's GT compressor wheels) you had to trade off efficiency for total cfm (in the case of the 50 trim), or total cfm for efficiency (in the case of the 60-1). The new GT series compressor maps are efficient at lower boost levels, as well as high boost levels and flow alot of cfm. I believe the GT compressor maps are the first of their kind to break over the 80% efficiency range. Most peak efficiencies range from 70-75%, and really good compressor maps range from 75-78%.

 

Boosted hybrid...what you said confused me a bit. you said "You are correct that the 50 trim has a better compressor map, but it does not flow nearly as much cfm as the 57 and 60 trim."

but when you did the calculations you calculated Airflow: 21.05 and Airflow: 37.32. so whats the difference what its capable of if you engine can only swallow 21 lbs/min?