1915 with AA 500 heads- now 2054
- V8Nate
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Re: 1915 with AA 500 heads- now 2054
He's running ptfe, it's pretty much good for everything but lava!
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Sent from my SM-N975U using Tapatalk
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Re: 1915 with AA 500 heads- now 2054
The base chemical was discovered sometime around 1936 or 1938 when the base chemical started attaching itself to things.
I just did several searches and while some agreed with what you said about PTFE and others do not "glow" to it as much when E85 is thrown into the mix so I am not sure if the fittings are part of the problem, but I think things should be looked at just-in-case.
I remember when E85 came out and the problems that came up by the chemical reaction of it to such things as fuel pumps, fuel lines et al. I also cracked up due to some of the supposed spec parts were thrown into the mix. One was talking about -10AN fittings leaking around the threads. The -10 means 5/8 fuel lines but the AN refers to a single spec that had probably over a thousand different spec'd out parts in it and not all of them are fittings, fasteners, et al (I did design work for most of my 35 years in design using the specs for most of the military designs and AN was just one of many. The AN and the detailing number comes first then the rest of the coding follows. Without getting deep into this, the longest spec I coded on the drawing and parts list the coding ended having 20 or 21 letters and numbers to give the description for the proper part being required.
An interesting discussion and searches... thanks!
Lee
- buguy
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Re: 1915 with AA 500 heads- now 2054
Yeah. All -6 ptfe braided stainless lines (3/8"). Everything i got for the fuel system is E85 compatible.
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Re: 1915 with AA 500 heads- now 2054
That's good to know. (I am still not a fan of braided SS lines as they were not designed for how some people use them and several other reasons. "Show" is not always good for "use" in the long run. Many years ago, when they were first being used or miss-used there "seemed to be" a lot of problems because of it.)
E85, as I remember when it first came out, caused a lot of problems and it's miss-uses turned up more problems. Also, if I remember correctly, it, like other fuel mixes, where the mix can change over the different weather conditions during the year or in different localities. Some brands of fuel also have various other additives that can cause problems, because of... or not, when it is being used in a wrong situation, e.g., engine components for example.
On the one URL I posted with all the writeups still there, there were differences of opinions in some of them and better explanations in some of them. Depending on how one asks questions the answers can be different or the replies can add or delete good information.
Lee
- buguy
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Re: 1915 with AA 500 heads- now 2054
So i hooked a vacuum gauge to the hose that goes on the regulator. Took a drive and it was showing plenty of boost. Apparently the regulator is just no good.
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Re: 1915 with AA 500 heads- now 2054
Or is the pump struggling with high pressure? Perhaps dropping flow?
Not sure how you can bench test the regulator. Maybe with air?
Not sure how you can bench test the regulator. Maybe with air?
- buguy
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Re: 1915 with AA 500 heads- now 2054
Anything is possible. I have the base pressure at something like 49 psi right now, but i have had it set up to 62 and it holds that fine so i don't suspect the pump.
I tried testing it with air, but it's super hard to regulate 145 psi down to 5-10 psi accurately. It did appear to be working fine though.
I tried testing it with air, but it's super hard to regulate 145 psi down to 5-10 psi accurately. It did appear to be working fine though.
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Re: 1915 with AA 500 heads- now 2054
Bummer,, Mike,,I'd prolly slap a carb on it and be done hope ya sort it out soon ,,
- buguy
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Re: 1915 with AA 500 heads- now 2054
Thanks Mike. I'm going to throw another regulator on it and see if that does it. I believe the one that's on it is adjustable from 40-70 psi, so i may just crank the pressure up until i get them swapped out. Turn the boost down a bit so i could drive it if i wanted to. I'm going to have to retune it once the new one is on anyway.
- buguy
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Re: 1915 with AA 500 heads- now 2054
Well i put the new regulator on and the pressure now rises with boost. Unfortunately it doesn't seem to have fixed my duty cycle issue. Still maxed out. On a scarier note, i hit 32.3 psi of boost at 48xx rpm on my test run. Poor stock rods! Lucky they didn't fly out the side.
- John S.
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Re: 1915 with AA 500 heads- now 2054
That must have set you back in the seat some.
Last edited by John S. on Mon Jan 31, 2022 7:45 am, edited 1 time in total.
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Re: 1915 with AA 500 heads- now 2054
as long as ya didn't clearance them rods too much they will be fine ,stock rods are stronger then you think
- buguy
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Re: 1915 with AA 500 heads- now 2054
I don't think i touched the rods.
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Re: 1915 with AA 500 heads- now 2054
Then ur 'Golden' I've reved stock rods pass 8 grand before
- buguy
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Re: 1915 with AA 500 heads- now 2054
Was it at 33 pounds of boost?!