i can read now!!!

[timucin]

finally some friends we had dinner this night showed me 'how to read compressor map of turbos'



its easy

[Albert]

share with us

I'm using this formula

PR = (boost + 14.7 + ic pressure drop) / 14.7
*1.5 is a good pressure drop estimation*

Di = (boost + 14.7) / [53.3 * 12 * (460 + intake temp)]
*130 is good estimate for post ic intake temp*

Mf = Di * displacement * (rpm/2) * volumetric efficiency
*displacement is in cubic in.; .9 is good estimate fo ve

Cmf = Mf * [sqrt(comp inlet temp/545) / (14.7/corrected comp inlet press.)]
*545 rankin is good estimate for inlet temp; Garrett uses 13.95 for corrected inlet press.*

The Cmf number is the lb/min result for x axis and the PR is the y axis.

[timucin]

Bore:3.2
Stroke:3.4
Number of cylinders:5
Rpm:8000
Ambient temp air:10
Engine ve:90
Boost pressure:26
Compressor efficiency:75
Intercooler efficiency:80
Engine capacity:136.6
Naturally aspirated cfm:284
Air temp before ic:129
Temp drop:81
Air temp after ic:48
Turbocharged cfm:706
Air/lbs per minute:49.98
Turbocharged hp:543
Turbocharged torque :356

[timucin]

engine ve: 90 :will do all blue printing ,port polish etc.
intercooler eff:80 : reaily huge 36.5 x 12 x 4 size


air lbs:50 per minute
i assume i will have 1.8 bar boost (8:1 je +carillo rods)
1.8 means 2.8 on map

but i cant popy turbo map from adobe form of garret catalogue...

will find another way...

bu i think i need smthng like gt 40

[timucin]

no,no
gt35r is cool for me right?
what do you thnik?

[timucin]

but i need :
compressor: 82 mm 070 ar
turbine : 68 mm 082 ar

-turbo service germany says , an audi owner 5 cyl received 560 hp with this turbo

[timucin]

albert ;
i dont use formulas , i actually received maximum boost by corky bell from amzon and started reading but i use online calculators