Was just wondering what would be the best oil pump to use?
An aftermarket unit or a stock ported unit?
Prices please on both.
Also, if the oil pump has larger ports, do you lose oil pressure at idle? If you think about it, it seems logical.
Not sure if the aftermarket unit would have this problem due to them possibly having different types of vains/ impeller.
Anyone with knowledge of these two please inform me.
I wasn't even going to change mine out, but everyone seems to be saying it needs to be changed out while I doing a cam swap and S/C install.
I only have 28,000mi on the engine.

Jim

 

Personally, I wouldn't think that you'd need to replace the oil pump with that low of mileage, especially on a well maintained engine. I don't have first hand experience with the aftermarket or ported pumps, but it seems to me like it's a big chunk of cash for something that's not a problem area as far as I've learned. One thing I have found out while doing some oil pump research is that the 4.8, 5.3, 6.0, LS6, etc. all use the same oil pump. I checked Lingenfelter's website, and found the cheapest price for a GENIII oil pump there. (can't post the price as they're a non-sponsor) It's not ported or anything, but it's what they recommend, and I'm pretty partial to Lingenfelter due to their reputation and years of proven results.

As for other aftermarket ones, I think they use stiffer relief springs to help bolster pressure. I agree that it makes sense if you make the port bigger, volume will increase but pressure will decrease. Still, I haven't heard or read about too many guys having oil starvation problems or low oil pressure, unless they've made modifications in that area to try to increase pressure and it worked against them (poorly ported pump or weak relief spring, bad pickup tube o-ring, etc.)

When I build my 6.0, I'm more than likely just gonna go with the Lingenfelter unit...unless I can get a factory one cheaper somewhere. Then again, I'm not gonna be spinnin to the moon either.

 

Sounds kind of like what I was already thinking. Since I will be ordering a cam from Lingenfelter, I may consider their oil pump.
We'll see. budget is already getting higher and higher. The cap is coming soon. Hopefully, there are not too many more mods needed.

Jim

 

I would only recommend doing the pump if you had already planned a timing chain replacement at the same time. You have to pull the pump off to replace the chain.

If you do decide to do it, just watch the o-ring. Put the pump on the crank shaft and rotate it to bolt in the tube - then bolt the pump to the block. If you bolt to the block before you get the tube in, you risk binding or pinching the o-ring. The tube will slide right in with ease this way.

 

Jegs has one by Melling, it is rated for 15.7% more oil volume and only costs $125.00 Part number 689-10296... I think i will put one of these in my 404 stroker, more oil getting cycled through the turbo can't be a bad thing, right?

 

Getting a little bit of mixed responses, that's ok though, I asked for it.
So...do any of you recommend even replacing the oil pump that only has 28,000mi on it?? If not, it will save me a few bucks. I wouldn't skimp in this area if I really knew it needed a better oil pump, I just don't know if it really needs to be replaced.
I also don't know if the timing chain needs to be replaced at this point. When do they usually begin to show signs of excessive wear or chain slack? Should I just leave this alone?
What do you guys think?

Jim

 

You are fine with leaving both alone. If you want a stronger chain, then do the pump also. A lot of people with big hp numbers still on the stock chain and pump. It just comes down to personal pref and piece of mind.

 

I did my cam and springs at 37k and re-used my timing chain and oil pump. (I have a mild set up though). The chain felt tight and everything looked good to me. (I'm totally **** about changing my oil also...it was crystal clear under my covers) You mentioned a supercharger though, which would possibly make me think about an LS2 timing chain for some cheap insurance...I think they're less than $30 or so from SDPC. Probably not necessary, but couldn't hurt I guess. But then like Ben mentioned, to do the chain, the oil pump comes off...(tough decision IMO )

 

I paid $100 buy it now off ebay for a lingenfelter, don't know if thats good or not but whats done is done.

 

I plan on that Melling (or some brand of larger pump) pump and a Crane Double roller chain... IF the parts are off (which they will be for the build up) just put the best you can in... I learned a long time ago not to go cheap and not to skimp when it comes to this stuff, it only hurts you more later...