Twin TC 67, 70, 72, or 76
02-06-2011, 10:59 AM
#1
Twin TC 67, 70, 72, or 76 I'm going to have Clay Forrester of Forrester Racing Engines and Fabrication build me a front mount twin setup. Engine and cam details in my sig. Looking to spin 7500rpm with this combo.
Here are some compressor maps I found. How do I read these things? I want to run 10-12psi on the street and 20psi at the track. 12 psi will need about 90lbm at 7500rpm. 20psi will need about 130lbm.
Here are some compressor maps I found. How do I read these things? I want to run 10-12psi on the street and 20psi at the track. 12 psi will need about 90lbm at 7500rpm. 20psi will need about 130lbm.
02-06-2011, 11:32 AM
#3
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(atmos p + gage P)/atmos p = PR So plot your points. EX: 20psi = (14.7 + 20) / 14.7 = 2.36 PR
2.36 and 65lbs (130/2 for 2 turbos) will plot on the 76 map at 75% eff....great for cooler discharge temps. And you will have room to grow because 20psi will not be the limit....never is.
Now plot the rest and you can compare.
2.36 and 65lbs (130/2 for 2 turbos) will plot on the 76 map at 75% eff....great for cooler discharge temps. And you will have room to grow because 20psi will not be the limit....never is.
Now plot the rest and you can compare.
02-06-2011, 03:01 PM
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interesting... in to watch this...
might go twins myself on a big cube 6 bolt motor and could use the tc76 i already have now...
what kinda rpm would you be seenin boost at?? full around 4k??
might go twins myself on a big cube 6 bolt motor and could use the tc76 i already have now...
what kinda rpm would you be seenin boost at?? full around 4k??
