[DFW] Local craigslist deals
#647
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
sooo rich mix exhaust burns hotter?
#648
#649
This formula is used
![](http://www.turbobygarrett.com/turbobygarrett/images/tech_center/tech_103/formula3.jpg)
Airflow formula
AFR is somewhere below 13 if hes running rich.
Airflow of a t60-1 .58A/R is rated at 47lbs.. so WA is 47lbs
Lets determine what the 500hp flywheel goal in relation to whats needed for WA
500x12AFRxBFSC of .55/60 = 55lbs/min
You need a turbo that efficiently moves that amount.
the t60 in the turbonetics efficiency is at 47lbs/min. This turbo is way too small for even that amount of flywheel hp. Its not saying it cant be done, but your trying to ram all this air into the a turbine causing lots of backpressure.
![](http://www.turbobygarrett.com/turbobygarrett/images/tech_center/tech_103/formula3.jpg)
Airflow formula
AFR is somewhere below 13 if hes running rich.
Airflow of a t60-1 .58A/R is rated at 47lbs.. so WA is 47lbs
Lets determine what the 500hp flywheel goal in relation to whats needed for WA
500x12AFRxBFSC of .55/60 = 55lbs/min
You need a turbo that efficiently moves that amount.
the t60 in the turbonetics efficiency is at 47lbs/min. This turbo is way too small for even that amount of flywheel hp. Its not saying it cant be done, but your trying to ram all this air into the a turbine causing lots of backpressure.
#651
You use this formula to account for displacement
![](http://www.turbobygarrett.com/turbobygarrett/images/tech_center/tech_103/formula8.jpg)
MAPreq = Manifold Absolute Pressure (psia) required to meet the horsepower target
· Wa = Airflowactual(lb/min)
· R = Gas Constant = 639.6
· Tm = Intake Manifold Temperature (degrees F)
· VE = Volumetric Efficiency
· N = Engine speed (RPM)
· Vd = engine displacement (Cubic Inches, convert from liters to CI by multiplying by 61.02, ex. 2.0 liters * 61.02 = 122 CI)
(55x639.6x(460+130)) / .92x(6500/2)x213.57
(20755020 / 638574.3) - sea level 14.7 equates to needing almost 18psi
![](http://www.turbobygarrett.com/turbobygarrett/images/tech_center/tech_103/formula8.jpg)
MAPreq = Manifold Absolute Pressure (psia) required to meet the horsepower target
· Wa = Airflowactual(lb/min)
· R = Gas Constant = 639.6
· Tm = Intake Manifold Temperature (degrees F)
· VE = Volumetric Efficiency
· N = Engine speed (RPM)
· Vd = engine displacement (Cubic Inches, convert from liters to CI by multiplying by 61.02, ex. 2.0 liters * 61.02 = 122 CI)
(55x639.6x(460+130)) / .92x(6500/2)x213.57
(20755020 / 638574.3) - sea level 14.7 equates to needing almost 18psi
#654
#656
#657
What was this guy smoking when he typed up this ad. G37 coupe for $8k
http://dallas.craigslist.org/mdf/cto/2536947866.html
http://dallas.craigslist.org/mdf/cto/2536947866.html