80% PUMP----20% METHANOL
09-07-2006, 04:58 PM
#1
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Join Date: Jan 2003
Posts: 117
finally, for me, concept met reality. happily i found both to be similar.
i have finally sorted thru a number of challenges w my car and gotten down to actually running alcohol. while it was just a start and i am sure there will be lots of learning opportunities along the way, i thought i'd share with you all my observations:
my system (ALKYCONTROL) is a 100% alcohol setup. my plan is to remove 20-30% of the pump gas and replace it with methanol. i plan to run at 23 psi on the street and track as that is the sweet spot for my turbos. my two turbos put out 84 pounds per minute, similar to a GT42.
i set my rig up to start spraying alcohol at 5.5 psi boost. after about 5 runs i am impressed as all spray initiated within 100 PIM points. that's a range between 5.35 and 5.49 psi!
i removed 20% from my base fuel across the board from P11 14,600 to P16 21,300. i did a slight transition just before P11.
my AFR transitioned from 12.5 to 10.4 as the spray started and dropped to a low of 9.4 at around 15 psi before raising to 10.1 at 6600.
my egts, (monitor and log on both rotors pre-turbo) started just before the spray at 1111 F, and dipped to 1075 mid-run at afr around mid 9 and then climbed toward the end to 1250. max boost 15.77 psi. max rpm 6600. IGL at modest 13 degrees w 11 degree split. fuel pressure 55psi. injector duty cycle (850/1600) 53%! that's down from the usual 80+%.
inspite of the sub 10 afr the motor ran cleanly since alcohol burns better. no hint of major richness but i will be leaning it out to 10.5 afr.
so far so good. can't wait to turn up the boost and get trimmed out.
stay tuned,
howard coleman
i have finally sorted thru a number of challenges w my car and gotten down to actually running alcohol. while it was just a start and i am sure there will be lots of learning opportunities along the way, i thought i'd share with you all my observations:
my system (ALKYCONTROL) is a 100% alcohol setup. my plan is to remove 20-30% of the pump gas and replace it with methanol. i plan to run at 23 psi on the street and track as that is the sweet spot for my turbos. my two turbos put out 84 pounds per minute, similar to a GT42.
i set my rig up to start spraying alcohol at 5.5 psi boost. after about 5 runs i am impressed as all spray initiated within 100 PIM points. that's a range between 5.35 and 5.49 psi!
i removed 20% from my base fuel across the board from P11 14,600 to P16 21,300. i did a slight transition just before P11.
my AFR transitioned from 12.5 to 10.4 as the spray started and dropped to a low of 9.4 at around 15 psi before raising to 10.1 at 6600.
my egts, (monitor and log on both rotors pre-turbo) started just before the spray at 1111 F, and dipped to 1075 mid-run at afr around mid 9 and then climbed toward the end to 1250. max boost 15.77 psi. max rpm 6600. IGL at modest 13 degrees w 11 degree split. fuel pressure 55psi. injector duty cycle (850/1600) 53%! that's down from the usual 80+%.
inspite of the sub 10 afr the motor ran cleanly since alcohol burns better. no hint of major richness but i will be leaning it out to 10.5 afr.
so far so good. can't wait to turn up the boost and get trimmed out.
stay tuned,
howard coleman
09-12-2006, 10:00 PM
#2
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Join Date: May 2002
Location: California
Posts: 22,465
09-13-2006, 08:09 PM
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Location: NJ
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Originally Posted by j9fd3s' post='836788' date='Sep 12 2006, 11:00 PM
zee germans are smart!
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