Optimum air / fuel ratio for marine engine
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Re: Optimum air / fuel ratio for marine engine
EGT Temp. vary wildly depending on how far the prob is away from the exhaust valve.On a dyno the probes are usually 6 inches from the valve.This is hard to do on a marine water jacketed header. I had mine in the exhaust port next to the header flange,i saw temps in the 1700*range.The dyno showed 1300*with the probs 6 inches downstream !
#12
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Re: Optimum air / fuel ratio for marine engine
EGT Temp. vary wildly depending on how far the prob is away from the exhaust valve.On a dyno the probes are usually 6 inches from the valve.This is hard to do on a marine water jacketed header. I had mine in the exhaust port next to the header flange,i saw temps in the 1700*range.The dyno showed 1300*with the probs 6 inches downstream !
#13
MarineKinetics
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Re: Optimum air / fuel ratio for marine engine
Some helpful information regarding EGT and tuning parameters;
http://www.maxracesoftware.com/egt_probes.htm
Bob
http://www.maxracesoftware.com/egt_probes.htm
Bob
#14
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Re: Optimum air / fuel ratio for marine engine
Some helpful information regarding EGT and tuning parameters;
http://www.maxracesoftware.com/egt_probes.htm
Bob
http://www.maxracesoftware.com/egt_probes.htm
Bob
#16
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Re: Optimum air / fuel ratio for marine engine
100*.5= 50 lb/hr
+ 20% = 60 lb/hr
You could just multiply that by hundreds and that should get you there. So, 700 hp = 420 lb/hr or about 60 gal/hr or 1 gal/min. Just be careful when sizing your fuel pump to know the operating pressure range for the pump. A pump curve is always best to know that your fuel delivery will be adequate at your operating pressure.
Rene
Last edited by oldandtired; 01-03-2007 at 08:49 AM.
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Re: Optimum air / fuel ratio for marine engine
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Re: Optimum air / fuel ratio for marine engine
If the flange is thick enough where it mounts to the head you can drill there.Most EGT probes are 1/8 pipe thread,about 5/16". Be sure you don't get into the water jacket , or you're S______!