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Author Topic: Mid- Engine Modified Sports  (Read 328848 times)
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Rex Schimmer
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« Reply #1530 on: September 30, 2018, 05:19:42 PM »

Neil, A 140 micron "filter" keeps out boulder, birds and small children! Pretty worthless in my view. That being said I did run an inlet filter on my electronic injected Zetec in my old lakes roadster but it was very large, -16 ports and the element was 100 micron but about 10 inches long. but I was having a problem with some material that I used to seal the gas tank and it was coming off in large chunks! I would not normally use an inlet filter on any pump. The 10 micron filter on the outlet is the right filter application.  It is the 25 micron and smaller stuff that is hard on fuel pumps and as I am sure that you have a very clean fuel tank and probably use a filter to put fuel in your tank my guess is that an inlet filter is not a requirement in your system.
Rex
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manta22
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« Reply #1531 on: September 30, 2018, 05:29:17 PM »

Thanks, Rex. I recently replaced my fuel cell and I want to keep any little pieces of the foam baffling out of the pump inlet but still provide a low restriction inlet.

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
manta22
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« Reply #1532 on: October 17, 2018, 08:22:50 PM »

I did replace the 10 micron filter on my Carter electric fuel pump inlet with a 140u Kinsler filter and the pump is definitely quieter so I think it confirms that the pump was cavitating a bit here at 3,000 ft and lots worse at 4,200 ft.

Cranking over the engine does not sound good at all! There is a thunk thunk as it cranks. Being mid-engine, the crank nose is virtually impossible to get to so I can't turn the crank by hand. I'll pull all the plugs and see what they look like but I think I'm going to need to pull the engine and tear it down. I'll have a talk with my engine builder (me). Arrrggghhh................

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
fordboy628
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« Reply #1533 on: October 17, 2018, 10:14:01 PM »


Cranking over the engine does not sound good at all! There is a thunk thunk as it cranks. Being mid-engine, the crank nose is virtually impossible to get to so I can't turn the crank by hand. I'll pull all the plugs and see what they look like but I think I'm going to need to pull the engine and tear it down. I'll have a talk with my engine builder (me). Arrrggghhh................


Neil,

Plug condition may tell the story.    The "thunk, thunk" smacks of mechanical damage, but the tried and true diagnostics may provide some insight:

A/   Compression test,
2/   Leak down test,
d/   Most of the small video inspection cameras fit in a 14mm spark plug hole.

If it is a bottom end issue though, might not be revealed until a post mortem.

 cheers  Dead Horse   cheers
F/b
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manta22
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« Reply #1534 on: October 18, 2018, 11:32:05 AM »

Fordboy;

Whatever it is, it's not trivial. I do have an el cheapo attachment for my cell phone that is a video camera fiber optic probe so I'll take a look in the cylinders to see if the engine ingested a foreign object, dropped a valve, etc. My guess, though, is that the noise is associated with the bottom end. We'll see. I'm committed to a car show on Saturday so I'll take it to town tomorrow and just tow it onto the field. I'll need some time to pull the engine/transaxle to do a teardown. I designed my chassis so I could remove a few tubes and then remove the engine & transaxle as an assembly so that makes it a bit easier.

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
RichFox
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« Reply #1535 on: October 18, 2018, 11:51:26 AM »

Is it a standard transmission? If so you could turn the engine by hand by turning the tires in gear. Sounds as though the engine need to come out anyway.
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tauruck
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« Reply #1536 on: October 18, 2018, 10:51:27 PM »

I hope it's not serious. cry cry cry
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