Intercooler piping
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From: Kelowna, BC
well it's actaully 2" on the greddy.... and yes it will be the stock greddy manifold.... Im going to have upgraded injectors (750 or 1000)... Do you think the stock greddy manifold is that restricting.... You would think it would be similar to the inline pro cast manifold...And I looked at the compressor map on the garret website but didn`t know what i was lookin at...haha.. sorry I`m still trying to learn all this stuff.. I guess it wouldn`t hurt to upgrade to 2.5" charge piping tho right..I just didn't want to run into the turbulance zone because of the small diameter pipe...
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From: Kernersville NC
greddy is 2" on the hot side of the fmic and 2.5 to 3" on the cold side. im using as much of the piping as i can with a cft manifold and pte billet 5857. Piping isnt going to make a significant difference.
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Originally Posted by m R g S r,Jun 11 2009, 01:23 PM
Okay way to be a dick, I was just pointing out that it's not a godspeed intercooler in that pic mounted on the car, it has cast end tanks and more densely packed fins than the cheapo one that many people use and think are great.
Anyway, You do want the smallest IC piping as possible for your setup that is able to handle the amount of air you are moving. If the piping is too small, flow will become turbulent. If the piping is too large, yes it can handle the flow, but boost response time will increase.
The velocities are in miles per hour and mach, and the flow rates are in cfm. Measurements for the piping are in inches.
0.4 mach = 304 MPH
2" piping
1.57 x 2 = 3.14 sq in
300 cfm = 156 mph = 0.20 mach
400 cfm = 208 mph = 0.27 mach
500 cfm = 261 mph = 0.34 mach
585 cfm max = 304 mph = 0.40 mach
2.25" piping
3.9740625 sq in = 1.98703125 x 2
300 cfm = 123 mph = 0.16 mach
400 cfm = 164 mph = 0.21 mach
500 cfm = 205 mph = 0.26 mach
600 cfm = 247 mph = 0.32 mach
700 cfm = 288 mph = 0.37 mach
740 cfm max = 304 mph = 0.40 mach
2.5" piping
4.90625 sq in = 2.453125 x 2
300 cfm = 100 mph = 0.13 mach
400 cfm = 133 mph = 0.17 mach
500 cfm = 166 mph = 0.21 mach
600 cfm = 200 mph = 0.26 mach
700 cfm = 233 mph = 0.30 mach
800 cfm = 266 mph = 0.34 mach
900 cfm = 300 mph = 0.39 mach
913 cfm max = 304 mph = 0.40 mach
2.75" piping
5.9365625 sq in = 2.96828125 x 2
300 cfm = 82 mph = 0.10 mach
400 cfm = 110 mph = 0.14 mach
500 cfm = 137 mph = 0.17 mach
600 cfm = 165 mph = 0.21 mach
700 cfm = 192 mph = 0.25 mach
800 cfm = 220 mph = 0.28 mach
900 cfm = 248 mph = 0.32 mach
1000 cfm = 275 mph = 0.36 mach
1100 cfm max = 303 mph = 0.40 mach
3.0" piping
7.065 sq in = 3.5325 x 2
300 cfm = 69 mph = 0.09 mach
400 cfm = 92 mph = 0.12 mach
500 cfm = 115 mph = 0.15 mach
600 cfm = 138 mph = 0.18 mach
700 cfm = 162 mph = 0.21 mach
800 cfm = 185 mph = 0.24 mach
900 cfm = 208 mph = 0.27 mach
1000 cfm = 231 mph = 0.30 mach
1100 cfm = 254 cfm = 0.33 mach
1200 cfm = 277 mph = 0.36 mach
1300 cfm max= 301 mph = 0.39 mach
So 2.25" can flow 700cfm safely, which is a lot of air.
An HKS GT3037: uses GT37 76mm 52trim compressor. 70mm housing inlet.
And it can flow 49 LB/Min or 709cfm max flow @ 2.4PR @ 60% efficiency with
33psi max boost limited by compressor wheel speed.
What's that, around 500hp range? So I don't think that at 450whp 2.25 is much of a restriction. So his tuner was correct if you want to look at it this way.
btw since i'm only a guest, you can ignore all this if you want.
Anyway, You do want the smallest IC piping as possible for your setup that is able to handle the amount of air you are moving. If the piping is too small, flow will become turbulent. If the piping is too large, yes it can handle the flow, but boost response time will increase.
The velocities are in miles per hour and mach, and the flow rates are in cfm. Measurements for the piping are in inches.
0.4 mach = 304 MPH
2" piping
1.57 x 2 = 3.14 sq in
300 cfm = 156 mph = 0.20 mach
400 cfm = 208 mph = 0.27 mach
500 cfm = 261 mph = 0.34 mach
585 cfm max = 304 mph = 0.40 mach
2.25" piping
3.9740625 sq in = 1.98703125 x 2
300 cfm = 123 mph = 0.16 mach
400 cfm = 164 mph = 0.21 mach
500 cfm = 205 mph = 0.26 mach
600 cfm = 247 mph = 0.32 mach
700 cfm = 288 mph = 0.37 mach
740 cfm max = 304 mph = 0.40 mach
2.5" piping
4.90625 sq in = 2.453125 x 2
300 cfm = 100 mph = 0.13 mach
400 cfm = 133 mph = 0.17 mach
500 cfm = 166 mph = 0.21 mach
600 cfm = 200 mph = 0.26 mach
700 cfm = 233 mph = 0.30 mach
800 cfm = 266 mph = 0.34 mach
900 cfm = 300 mph = 0.39 mach
913 cfm max = 304 mph = 0.40 mach
2.75" piping
5.9365625 sq in = 2.96828125 x 2
300 cfm = 82 mph = 0.10 mach
400 cfm = 110 mph = 0.14 mach
500 cfm = 137 mph = 0.17 mach
600 cfm = 165 mph = 0.21 mach
700 cfm = 192 mph = 0.25 mach
800 cfm = 220 mph = 0.28 mach
900 cfm = 248 mph = 0.32 mach
1000 cfm = 275 mph = 0.36 mach
1100 cfm max = 303 mph = 0.40 mach
3.0" piping
7.065 sq in = 3.5325 x 2
300 cfm = 69 mph = 0.09 mach
400 cfm = 92 mph = 0.12 mach
500 cfm = 115 mph = 0.15 mach
600 cfm = 138 mph = 0.18 mach
700 cfm = 162 mph = 0.21 mach
800 cfm = 185 mph = 0.24 mach
900 cfm = 208 mph = 0.27 mach
1000 cfm = 231 mph = 0.30 mach
1100 cfm = 254 cfm = 0.33 mach
1200 cfm = 277 mph = 0.36 mach
1300 cfm max= 301 mph = 0.39 mach
So 2.25" can flow 700cfm safely, which is a lot of air.
An HKS GT3037: uses GT37 76mm 52trim compressor. 70mm housing inlet.
And it can flow 49 LB/Min or 709cfm max flow @ 2.4PR @ 60% efficiency with
33psi max boost limited by compressor wheel speed.
What's that, around 500hp range? So I don't think that at 450whp 2.25 is much of a restriction. So his tuner was correct if you want to look at it this way.
btw since i'm only a guest, you can ignore all this if you want.
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