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Why Block The Oil Filter Bypass Valve? |
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jtsllc1
AMC Addicted Joined: Sep/24/2013 Location: ORFORDVILLE WI Status: Offline Points: 1035 |
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ZERO OIL PRESSURE, OIL PRESSURE FLUCTUATION? Answers...There are only a few culprits to to these problems. ______________________________________________________________________________ Time to do a little test.... Whip up a block off for the by pass and pick up a NAPA GOLD 1258... Just for testing... If the test proves out then grind and and chase with a die for the FL1A... It is quite possible that the filter bypass took a poop... |
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JTSLLC1
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amc67rogue
AMC Addicted Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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There are 2 styles of oil filters, external by pass and internal by pass. IIRC all GMs and AMC are external , Ford and Mopars internal. Either way the filter is a partial flow.( In Bill Jenkins book The Chevrolet Racing Engines ) he stated that there isn't enough media surface area in a 1QT. filter that can handle the volume of oil with out a by pass valve. He used a remote mount with no bypass and a 2 QT filter.
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Keith Coggins 67Rogue X code
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74Bubblefender
AMC Addicted Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589 |
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Additionally there are 2 different style of outputs on oil filter bypasses. Some drain to the pan and the ones used in amc output to the bearings. A single oil filter adaptor will put a choke hold on a race motor. You cannot get enough flow through the filter whe your racing. Its why folks who run a big oil pan run out of pressure at the end of a 1/4 MILE run. If you dont run the right stuff you will be putting money into that motor soon.
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We are just about to forge new AMC V8 crankshafts.. please check here
http://www.bulltear.com/forums/showthread.php?19564 |
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jtsllc1
AMC Addicted Joined: Sep/24/2013 Location: ORFORDVILLE WI Status: Offline Points: 1035 |
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I had a little chit chat with Bob Stiege.....
We went a couple rounds on the By Pass Theory.. His conclusion was there is nothing wrong with the AMC oil system up to 7200 RPM as long as you have 8 quarts of oil to make it down the track to avoid starving the motor.... Anything over 7200 RPM is a whole new world..... He only modifies his stock pan to hold 8 quarts, extends his pickup and made a modification to accept the FL1A Motorcraft Filter because he could not find an AMC filter at the auto parts store... So for my situation I need to take the motor down to see what happened.... After doing a little testing the idea of adding a bypass block off or adding a high pressure spring is not the solution to my problem... I need to find the problem to Fix the problem.... To prevent future problems the conversion to a FL1A Motorcraft Filter seems to be the only modification I need to make.... I respect everyone's decision to do things their own way this is just the conclusion I came up for me... On that note I have a used deep sump oil pan with swivel pick up and external oil line for sale for the same price I paid 250.00.... |
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JTSLLC1
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dkrtgood
AMC Addicted Joined: Jun/27/2011 Location: St Pete, FL Status: Offline Points: 1371 |
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I know it's an old thread but maybe someone can elaborate on using the FL1A filter.
What do you have to change or mod to use this filter? is the thread on our housings the same? I have done the bypass mod (Not installed yet) and before installing want to use this filter to have a better bypass in filter vs the AMC filter. Thanks
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Dave Goodwin
President of Tampa Bay AMC 70 Mark Donohue BBO 390 5-speed 77 Matador Coupe AKA "The Beave" 70 Javelin 360 / Auto - BBG |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Since you have done the bypass mod, obtain this at the local Dodge service and parts department. Mopar Part 53007563AB OIL FILTER CONNECTOR Then you can use the Ford FL1A filter. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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jpnjim
AMC Addicted Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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There's also a slightly cheaper Omix one on Amazon, or save $4 and drive to the dealer.
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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jtsllc1
AMC Addicted Joined: Sep/24/2013 Location: ORFORDVILLE WI Status: Offline Points: 1035 |
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Just switching to the Ford filter all you have to do is remove the thread insert grind it to the right dia. and chase it with a die which is the same thread as the Ford filter... I think there is a threaded insert available for the conversion... I will be stopping by Bobs today and I can write down the size die he lent me to do mine... The modification seems to be working fine.... On the dyno off the dyno etc. I am getting ready to do it all over again for my 366 CI build..... |
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JTSLLC1
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dkrtgood
AMC Addicted Joined: Jun/27/2011 Location: St Pete, FL Status: Offline Points: 1371 |
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Perfect, i bought that part off ebay just now..easier that finding the right die.
Thanks for clarification on modifying the existing..thats what I was unsure of. |
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Dave Goodwin
President of Tampa Bay AMC 70 Mark Donohue BBO 390 5-speed 77 Matador Coupe AKA "The Beave" 70 Javelin 360 / Auto - BBG |
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sasyamx
AMC Addicted Joined: Jul/24/2007 Location: Kentucky Status: Offline Points: 525 |
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Reading this got me all confused , i am running a stock late model oil adapter thats a factory block oil bypass , not even cast in it and running a stock amc wix filter , street driven , so far no issues , but am i running the right filter
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