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Oil Pump for 100K Cam Swap?

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Old 05-21-2009, 11:04 AM
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Originally Posted by 01formula6
I know the smarter thing is to just replace it, and I'll most likely go that route. My only problem with this logic is that it can be used to justify replacing a lot of parts. Why not just pull the heads since the springs are already off and replace the lifters, since the intake is now off why not throw on a 90/90, well now I'm going to need bigger injectors.....next thing you know it's a 3 grand cam swap.
thats pretty much what i did. had a lil lifter noise, so since heads had to come off i got a set of ported 243's. no point in doing heads without a cam, so i got a cam...intake has to come off so i got an ls6 and ported TB. longtubes, etc etc. might as well do it the right way the first time.
Old 05-21-2009, 11:59 AM
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I say get the ported LS6 if you do decide to eventually swap it. No need to get a melling unless you're running a high lift/rpm cam.
Old 05-21-2009, 02:43 PM
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just cause I'm curious....how many people have actually has their oil pump fail. I've owned and driven multiple vehicles(lsx and non) past 150k on stock oil pumps and never had one fail (one of which is 89 chevy at 480k). I hear a lot people saying they "hear" that they go bad....but no one has ever personally seen it. I'm at basically 100k now(on my SS) and have had multiple sub 238 duration cams in on the stocker....no oil pressure problems.
Old 05-21-2009, 04:21 PM
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i had an 87 astro w the 4.3 and the pump bled off pressure prematurely at about 200k. i was getting about 40 psi cold idle and 5-10 psi at hot idle. i put an auto zone pump in and had 50 psi hot idle and 70+psi cold idle. Huge improvement.
Old 05-21-2009, 04:54 PM
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Melling makes a good HV+18% oil pump or you can go with a ported LS6 as I have read here. Either way if your doing an other than "Stock" rebuild you want either a HV HO or a ported LS6 pump, also at 100K miles replace your pick up tube. You can also go with a deeper oil pan and have more oil available again depends on the build you're doing.

Get rid of your stock pump


YOU ARE ASKING FOR TROUBLE

And I am sure the guys here will not hesitate in laughing at you for not taking advice. Laughter and advice is free pride that cause mistakes usually costs money.
Old 05-22-2009, 01:51 AM
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The '98 Formula that I used to own was on its second motor because the oil pump died and my ex wife was (and still can be) a little *slow* when it comes to paying attention to gauges.



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