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Old 04-26-2011, 07:43 PM   #22
ASF Machine
Former Vendor
 
Member#: 236349
Join Date: Jan 2010
Location: Western Colorado
Vehicle:
1993 Impreza
OD Green

Default

Updated more SOHC weirdness to post #1.





EJ251 SOHC "Polyquad"
Staggered Valve sizes Intake: 35.05mm @ 45* seat into radius & 36.05mm @ 30* seat into radius w/ 6* deshroud
Exhaust: 30.5mm & 31.5mm 45* seats into radius
Port Matched to TGV (yep empty TGVs on a SOHC) + asymmetrical ASF Port & Polish
Polished & staggered deshrouded chambers
SF-110
7" H2O corrected to 28"
Comments: Intake is EXTREMELY turbulent in both directions, I was after some "twirl" to aid in ethanol atomization for better burn but this seems a bit extreme. This turbulence is what I attribute the loss of intake flow to... as an added odd note; peak flow in reverse on the intake was 306 CFM from .400-.500".
I can only speculate that these heads would be a poor pairing with an NA setup & bunches of overlap, the dyno will tell us how they do with some FI goodness.



Code:
Lift    Intake Flow    Dogleg Exhaust   Straight Exhaust         
.050           51              31                  50
.100           98              88                  93 
.150          143            125                 129 
.200          188            161                 174  
.250          218            183                 204   
.300          241            194                 225  
.350          253            199                 230    
.400          257            203                 244   
.450          268            205                 246  
.500          276              -                    -


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Last edited by ASF Machine; 04-26-2011 at 08:11 PM.
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