SPUN A BEARING !!!!! 383 or lq9
02-21-2013, 08:10 AM
#26
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really need to know if 109 would be enough for my setup???
i cant find 110 unleadded and i dont have the funds to just order 55drum lol.
dont want to be on a mission every time im going to go to the track.
thanks for the help so far
i cant find 110 unleadded and i dont have the funds to just order 55drum lol.
dont want to be on a mission every time im going to go to the track.
thanks for the help so far
02-22-2013, 01:21 PM
#29
I have sprayed that much on straight 93 for years. Its all going to be in the tune up.
Dave
02-22-2013, 01:41 PM
#30
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Idea would be to use 116 in the dedicated and 93 in the fuel tank. If all you can find is 109 it honestly should be fine with a 10:1 compression ratio at a 150-200 shot.
I have sprayed that much on straight 93 for years. Its all going to be in the tune up.
Dave
I have sprayed that much on straight 93 for years. Its all going to be in the tune up.
Dave
02-22-2013, 01:44 PM
#31
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The most I'll run on straight pump is 175. Could probably get away with 200 but don't want to chance it. I use shell urt 110 unleaded but it's on back order right now. 50/50 in tank for 200 shot and about 80/20 mix for 250. Will be running straight 110 when I up the shoot.
02-23-2013, 09:09 AM
#34
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The most I'll run on straight pump is 175. Could probably get away with 200 but don't want to chance it. I use shell urt 110 unleaded but it's on back order right now. 50/50 in tank for 200 shot and about 80/20 mix for 250. Will be running straight 110 when I up the shoot.
02-23-2013, 12:42 PM
#35
This is a good starting point with compression and isnt' high compression by any means. Pump gas will work just fine in the main tank. I wouldn't worry yourself to death about having to find unleaded race gas. As long as you have an open loop tune you really don't need to worry about your narrow band sensors. Your wide band sensor will handle leaded race gas no problem.
104, 109, 110 will all work just fine.
02-23-2013, 05:09 PM
#36
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If you're heads were stock at 67cc then you'd have 10.76:1 static compression with a flat top piston. If they've been cleaned up twice as you have said, they are more than likely at 66cc or just under that giving you a 10.91:1 static compression ratio.
This is a good starting point with compression and isnt' high compression by any means. Pump gas will work just fine in the main tank. I wouldn't worry yourself to death about having to find unleaded race gas. As long as you have an open loop tune you really don't need to worry about your narrow band sensors. Your wide band sensor will handle leaded race gas no problem.
104, 109, 110 will all work just fine.
This is a good starting point with compression and isnt' high compression by any means. Pump gas will work just fine in the main tank. I wouldn't worry yourself to death about having to find unleaded race gas. As long as you have an open loop tune you really don't need to worry about your narrow band sensors. Your wide band sensor will handle leaded race gas no problem.
104, 109, 110 will all work just fine.
02-24-2013, 12:16 AM
#38
Yes you can run leaded race fuel and not harm your wideband sensor. Narrowband is a different story. I've personally never seen race fuel mess up a wideband.
Open loop is when you're ecu is operating without referencing the narrowband for fuel trim compensation and runs solely off the ve and open loop fuel adder table. Closed loop is the opposite where the narrowband references stoich and trims fuel based on what those narrowband sensors see in terms of air fuel ratio based off the ve, maf and fuel adder tables.. They aren't very accurate with a lot of overlap and are thrown off by it thus needing to do open loop tunes in extreme cases. IMO open loop is much easier to tune.
Open loop is when you're ecu is operating without referencing the narrowband for fuel trim compensation and runs solely off the ve and open loop fuel adder table. Closed loop is the opposite where the narrowband references stoich and trims fuel based on what those narrowband sensors see in terms of air fuel ratio based off the ve, maf and fuel adder tables.. They aren't very accurate with a lot of overlap and are thrown off by it thus needing to do open loop tunes in extreme cases. IMO open loop is much easier to tune.
Last edited by Sales@Tick; 02-24-2013 at 12:24 AM.
02-24-2013, 09:33 AM
#39
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Yes you can run leaded race fuel and not harm your wideband sensor. Narrowband is a different story. I've personally never seen race fuel mess up a wideband.
Open loop is when you're ecu is operating without referencing the narrowband for fuel trim compensation and runs solely off the ve and open loop fuel adder table. Closed loop is the opposite where the narrowband references stoich and trims fuel based on what those narrowband sensors see in terms of air fuel ratio based off the ve, maf and fuel adder tables.. They aren't very accurate with a lot of overlap and are thrown off by it thus needing to do open loop tunes in extreme cases. IMO open loop is much easier to tune.
Open loop is when you're ecu is operating without referencing the narrowband for fuel trim compensation and runs solely off the ve and open loop fuel adder table. Closed loop is the opposite where the narrowband references stoich and trims fuel based on what those narrowband sensors see in terms of air fuel ratio based off the ve, maf and fuel adder tables.. They aren't very accurate with a lot of overlap and are thrown off by it thus needing to do open loop tunes in extreme cases. IMO open loop is much easier to tune.
