Check this out guys (DIY Compressor mapping)
 

Hey i was trying to figure out what turbo to run and i made a little program to help. Open it in excel. Basically input the Displacement and Boost and it will give you the corrected mass flow and pressure ratio. Dont mess with the other numbers unless you know what your doing. This will give you a very close estimate of what your looking for. Then just compare the pressure ratio and corrected mass flow to your compressor map and thats it.


http://students.uww.edu/metcalfpt31/turbocalc.xls

Re: Compressor map program
 

Thats pretty cool It seems to work pretty good. I'm just really sick of looking at excel right now, 4 hours last night doing homework.

Re: Compressor map program
 

Very nice work. I think most of us just pick up a junkyard T3 and run it, but I've looked into compressor maps before to plan for the big project and it's a ball of confusing garbage.


This should be a sticky of some sort. ;)

Re: Compressor map program
 

After you put in your info you can compare it to compressor maps here http://64.225.76.178/catalog/compmaps/fig5.html

Now is where i decide if i want a Super 60 T3 or a 40 trim T3/T04E..... :-\

Re: Check this out guys
 

Anybody check this out?

Re: Check this out guys
 

I checked it out. The hmt way is to not look at compressor maps, but it's definately a cool thing you made. I could use it as the "DIY of the month" spotlight next month if you'd like. Pm me if interested.

Re: Check this out guys (DIY Compressor mapping)
 

Nice job, ya im sick of OFFICE in general, 4 more weeks left!!!

Re: Check this out guys (DIY Compressor mapping)
 

thanks..

even though i already did the math for my setup, this is a nice little tool to have.

Re: Check this out guys (DIY Compressor mapping)
 

You have no idea how this has helped me and my friends in the last few hours. Much thanks. ^-^

Re: Check this out guys (DIY Compressor mapping)
 

okay this is the ----!

question though...now i plugged all my info into the ------sheet and i opened the compressor map for my t3 60 trim, now what?

i mean i layed out a straight horizontal line at 1.78 pressire ratio (the vertical edge on the map) and then marked along that line where my CMF number fell at each rpm. so i have a straight horizontal line with CMF points at each point for rpm.

is that correct did i explain that well enough. its hard to explain does anyone have a graph that is correctly plotted?

im using a z6 motor so 1595 displacement and 10 psi for input numbers
and im using the t3 "60 trim" map if someone wants to duplicate this.
thanks!

Re: Check this out guys (DIY Compressor mapping)
 

Sweet!

I could have really used this back when I was selecting a turbo... I sat down with Maximum Boost one afternoon and cruched the numbers for my setup, took me forever to figure it out!

I'm going to save this one for future reference... if/when I upgrade to a larger turbo!

Re: Check this out guys (DIY Compressor mapping)
 

Once you have put in the numbers you do what you said and basically put a horizontal line on the graph where the pressure ratio is. Then you compare the CFM in the rpm range you are looking in and you can find the efficiency. So basically you can see where you will be at peak efficiency and thats where youll want to make peak power. So you dont want to be at 60% at 6500 rpm.

Re: Check this out guys (DIY Compressor mapping)
 

Ok so im using the t3 "60 trim" map (i have a .48/.60 60 trim) when i draw my horizontal line and map out the points from 5k-8k are in the 74% "bubble" so is that telling me that from 5k to 8k im in the peak effiency for that turbo?!!

its nice my horizontal line goes right through the fattest part of the "bubble" to i have worked a couple other maps including the super 60 and none of the other maps look as good as this one does!

Re: Check this out guys (DIY Compressor mapping)
 

yes thats exactly what you have to do.

Re: Check this out guys (DIY Compressor mapping)
 

Could someone check one out for me since I don't have excel? PM me if you would.