How does the GT30R Compressor map look?

[Sleepr DSM]

http://www.cpi.bz/Gabez0/Turbo/Gt30R.pdf

I'm just looking for input/opinions,criticism, praise, etc. on how you believe this one would function..best with what turbine, etc. from those of you who are experts at reading Compressor maps and statistics.

 

[allwheelTSI]

they don't work very well with the DSM on pump gas.. its a better for 25+lbs on C16.

 

[bigfoot]

http://www.dsmtuners.com/forums/showthread.php?s=&threadid=37304&highlight=the+best+pump+gas+turbo

 

[Sleepr DSM]

Thanks for the link and comment.
In response to the comment that this turbo would only work best at 25psi or better on C16; I took 27 psi (14.7+27/14.7)= 2.84 on the compressor map. That puts this map operating outside of its peak efficiency, but still doing quite well. I don't see this as a 25 psi and up "ONLY" turbo base on the math that I have done in this thread. Please correct me if I'm wrong, but... If you wanted to run as low as 16 psi, on the compressor map that works out to be 2.08. (14.7+16/14.7) That puts you in the heart of the efficiency range of this map. It also appears that you can stay in peak efficiency (78%) all the way past 400 pounds per minute of air, by turning up the boost. Again, if I am doing things the wrong way, let me know. I'm no expert. I also lack the real world experience to equate this to how the thing would perform on a DSM.
My goal is to run 18 to 25 pounds of boost. At 18-psi (2.22) you could still be in peak efficiency at over 360 lbs. per minute. At 25 psi and 400 pounds of air, you could still ride in the peak efficiency of the turbo. Am estimating incorrectly? This all looks pretty good compared to a number of other compressor maps, without knowing approximate lag time. How would the be a wheel that is only suitable for 25psi and C16?

What I would like to know is, does a compressor map reveal an estimated lag? I'm expecting to hear that this wheel might not build full boost until 4500? That doesn't bother me at all.

 

[allwheelTSI]

Originally posted by Sleepr DSM
Thanks for the link and comment.
In response to the comment that this turbo would only work best at 25psi or better on C16; I took 27 psi (14.7+27/14.7)= 2.84 on the compressor map. That puts this map operating outside of its peak efficiency, but still doing quite well. I don't see this as a 25 psi and up "ONLY" turbo base on the math that I have done in this thread. Please correct me if I'm wrong, but... If you wanted to run as low as 16 psi, on the compressor map that works out to be 2.08. (14.7+16/14.7) That puts you in the heart of the efficiency range of this map. It also appears that you can stay in peak efficiency (78%) all the way past 400 pounds per minute of air, by turning up the boost. Again, if I am doing things the wrong way, let me know. I'm no expert. I also lack the real world experience to equate this to how the thing would perform on a DSM.
My goal is to run 18 to 25 pounds of boost. At 18-psi (2.22) you could still be in peak efficiency at over 360 lbs. per minute. At 25 psi and 400 pounds of air, you could still ride in the peak efficiency of the turbo. Am estimating incorrectly? This all looks pretty good compared to a number of other compressor maps, without knowing approximate lag time. How would the be a wheel that is only suitable for 25psi and C16?

What I would like to know is, does a compressor map reveal an estimated lag? I'm expecting to hear that this wheel might not build full boost until 4500? That doesn't bother me at all.

i did'nt say it was ONLY good for that,but better suited. i was just saying that as far as a pump gas turbo,its not nearly efficent as say a .50 trim,some love them,some dont. i just go by what works the best with the current setup. the GT30R wheel is'nt out of its efficency range at 25psi,from the results i've seen,they are pretty happy at that level.

 

[larryd]

Originally posted by allwheelTSI
they don't work very well with the DSM on pump gas.. its a better for 25+lbs on C16.

I wouldnt say they dont work very well. If someone can actually tune the car decently they could probably manage close to 400whp on pump gas on it, but it is definitely better suited at 20+ lbs of boost on C16.

 

[marshall]

The GT37 76mm wheel/TS04 housing map looks much more attractive to me. If it could be teamed up with something a bit smaller than the 1.12 a/r turbine housing it would be a great turbo for a 2L up to 27psi.

Marshall