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phila_dot
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« Reply #15 on: November 29, 2012, 09:50:11 PM »
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Anyone tune FZWSTTM for this purpose?
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sn00k
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« Reply #16 on: November 30, 2012, 03:20:48 PM »
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Anyone tune FZWSTTM for this purpose?
i have it defined, and i actually dont know WHY i havent been using it for e85.. as i was using it earlier on my 91oct tune.. i will give it a go.. but KFZWWLRL did smooth things out real nice in cold weather. currently running e85 in -10degC, fires right up on first crank  if i wait ~20sec, i can drive from the parking-lot real smooth and without any hestitations at all.. BUT if i fire it up and try to go right away there is just no power there.. im thinking i would have to increase the warm-up fueling by ~300% to get only the gasoline part to ignite to cure this problem.. as the ethanol part is having a hard time igniting untill cumbustion chamber is warm.. other suggestions? i have a set of special e85 injectors going into the engine real soon.. with extreme atomization for this fuel.. ill see if i can get the ethanol part to ignite at lower temperatures by reducing dropplet size and allowing it more surface area.. aswell as a better spray-pattern. |
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« Last Edit: November 30, 2012, 03:32:33 PM by sn00k »
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silentbob
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« Reply #17 on: November 30, 2012, 03:51:33 PM »
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You are all aware of oil dilution are you? The "enrichment" doesn't go out the exhaust.
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smurfbus
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« Reply #18 on: December 02, 2012, 12:51:09 AM »
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What is the optimal lambda for these really cold starts? Mine is at 10-11AFR (gas gauge) and it takes about three starts with pumping the gas above 2000rpms until it settles. I'm leaning it out 10% increments but no luck so far.
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ABCD
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« Reply #19 on: December 02, 2012, 09:33:40 PM »
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You are all aware of oil dilution are you? The "enrichment" doesn't go out the exhaust.
Whats that? you mean fuel ends up mixing with lunricating oil?..or it gets trapped in catalyst? |
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jibberjive
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« Reply #20 on: December 02, 2012, 11:05:28 PM »
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Whats that? you mean fuel ends up mixing with lunricating oil?..or it gets trapped in catalyst?
It ends up in the oil, which is detrimental to it's lubricating/cooling properties. |
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ABCD
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« Reply #21 on: December 02, 2012, 11:27:39 PM »
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It ends up in the oil, which is detrimental to it's lubricating/cooling properties.
But, why should it end up in oil, if the sealing at piston ring is proper. More fuel should not mean that it will go in the crank case... |
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smurfbus
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« Reply #22 on: December 02, 2012, 11:42:47 PM »
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The rings are not that tight when cold.
how about the target AFR?
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jibberjive
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« Reply #23 on: December 02, 2012, 11:47:07 PM »
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But, why should it end up in oil, if the sealing at piston ring is proper.
More fuel should not mean that it will go in the crank case...
Do some googling of "oil dilution" "incomplete combustion" and "cold engine" |
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ABCD
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« Reply #24 on: December 02, 2012, 11:47:53 PM »
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The rings are not that tight when cold.
how about the target AFR?
Thanks for info |
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ddillenger
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« Reply #25 on: December 03, 2012, 12:48:32 AM »
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Unburnt fuel also washes the cylinder walls of lubrication, causing top end wear.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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Bische
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« Reply #26 on: December 03, 2012, 02:18:34 AM »
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Would such massive enrichment be needed at like +5-10*c?
Planning on running e85 at summer and 98 at winter, but early/late summer it will go down towards like +5*c.
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ddillenger
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« Reply #27 on: December 03, 2012, 03:36:46 AM »
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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sn00k
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« Reply #28 on: December 03, 2012, 03:59:34 AM »
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Would such massive enrichment be needed at like +5-10*c?
Planning on running e85 at summer and 98 at winter, but early/late summer it will go down towards like +5*c.
at around 10degC, no problems at all using the normal gasoline enrichment levels for coldstarts.. at 5degC, about 15-25% extra needed the first 20-30 seconds for a smooth start in first crank.. (this using normal injectors.) so i wouldnt worry in those temps. yesterday it was -24degC outside, and with some tweaking of the tables i got the car to fire up on the 4th crank.. no power was present when i tried to pull out of the parking-lot tho.. waited ~30 seconds for the cumbustion chambers to heat up and it was a smooth ride from there.. im thinking a small cache-tank with fuel pre-heating and circulation thru the rail before start might be good to implement for these temperatures.. i have an idea on how to solve this..! =P (warm fuel = wont have to enrich more then with gasoline = VERY good for the engine, starts and economy) |
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phila_dot
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« Reply #29 on: December 05, 2012, 10:36:02 PM »
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Is there any reason we can't get %STADAP to handle startup enrichment?
If you are maxing out the enrichment adaptation, then the limit can just be increased.
Only range zero would have to be tweaked I think, maybe adjust the temp ranges themselves slightly too.
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