Cleaning carbon deposits without removing head
07-10-24, 03:36 PM
#16
Sorry I may have cause the confusion. The Steam just comes out back the exhaust pipe is all.
Look at this link.
https://www.physicsforums.com/thread...r-fact.793344/
FYI: Seafoam sucks.
Look at this link.
https://www.physicsforums.com/thread...r-fact.793344/
FYI: Seafoam sucks.
07-10-24, 06:29 PM
#17
Tech Info Resource
iTrader: (2)
Sorry I may have cause the confusion. The Steam just comes out back the exhaust pipe is all.
Look at this link.
https://www.physicsforums.com/thread...r-fact.793344/
FYI: Seafoam sucks.
Look at this link.
https://www.physicsforums.com/thread...r-fact.793344/
FYI: Seafoam sucks.
Water as an internal coolant is of interest as a means of suppressing knock in short bursts of high power output, that is, during take-off and during combat manoeuvres. In these cases it would probably be necessary to use a water-alcohol mixture to prevent freezing. Such a procedure would permit high powers during take-off with a fuel of a low octane number.
...it is estimated that for a water-fuel ratio of 0.6, an engine requiring a fuel of 100-octane number could operate satisfactorily on a fuel of 80-octane number... The data indicate that the permissible decrease in octane number for moderate quantities of water injected is considerable.
The temperature of the rear spark-plug bushing at a fuel-air ratio of 0.067 [ie air/fuel ratio of 14.9:1] showed a change of only 18 degrees F as the permissible indicated mean effective pressure [IMEP*] was increased from 180 to 305 through the induction of water at a water-fuel ratio of 0.6.
[However] the exhaust-valve-guide temperature showed a considerable increase as the maximum inlet pressure was increased with the water injection. This increase is probably caused by the increased mass flow of the gases passing around the exhaust valve and possibly also through increased gas leakage past the guide, resulting from the higher exhaust pressures that occurred.... The temperature of the head between the valves showed a noticeable decrease for the higher values of water-fuel ratio, even though the engine power was increased.
...it is estimated that for a water-fuel ratio of 0.6, an engine requiring a fuel of 100-octane number could operate satisfactorily on a fuel of 80-octane number... The data indicate that the permissible decrease in octane number for moderate quantities of water injected is considerable.
The temperature of the rear spark-plug bushing at a fuel-air ratio of 0.067 [ie air/fuel ratio of 14.9:1] showed a change of only 18 degrees F as the permissible indicated mean effective pressure [IMEP*] was increased from 180 to 305 through the induction of water at a water-fuel ratio of 0.6.
[However] the exhaust-valve-guide temperature showed a considerable increase as the maximum inlet pressure was increased with the water injection. This increase is probably caused by the increased mass flow of the gases passing around the exhaust valve and possibly also through increased gas leakage past the guide, resulting from the higher exhaust pressures that occurred.... The temperature of the head between the valves showed a noticeable decrease for the higher values of water-fuel ratio, even though the engine power was increased.
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jgscott (07-10-24)
07-10-24, 10:24 PM
#18
Whole lotta bro science in that thread. Pretty obvious they've never hear of Ricardo's water injection experiments and how they were able to run much more abundant low octane fuels as a result of those experiments.
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lobuxracer (07-11-24)
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