My LT1 has over 140,000 miles and since I have the engine out I figured I should go ahead and replace it. Will the standard melling oil pump work for an Lloyd port job with 150 shot of nitrous on top of that? Also should I replace anything else with the oil system?

 

I think you should be fine with it. That's what I'm using. With the higher volume pump you would need a larger pan so it didn't suck it dry.

 

What does the oil pump have to do with nitrous? And what is a Lloyd port jump? And what else is there to the oil system besides the pan and filter? Maybe i'm just confused

 

Sorry I fixed it, I meant port job. I was just thinking that everyone would agree with me that a standard oil pump would work with nitrous since I don't have to rev the rpms real high to get the power from nitrous. Also I thought there was some type of shaft or something that can be replaced or does this come with the new oil pump already? Sorry for the confusion.

 

I'm still missing the point of what the oil pump has to do with the nitrous and head work. The drive shaft that goes to the cam can be replaced. About all I can tell you is if you go to a high volume oil pump you have to use a high volume oil pan. A high volume pump will suck a stock pan dry.

 

I would put in a higher pressure spring in the Melling pump and use a drive shaft with a metal coupler.

 

I guess this high pressure spring will go in the "STANDARD melling oil pump". Also do you know where I can get the spring and metal coupler and do I use the regular oil pan? Thanks for the help.
About the nitrous and port work I guess I was wondering if the standard oil pump would work or will I be drying some stuff due to the extra power and OH YEAH I am putting in a 306 cam so I will be doing higher revs maybe up to 6500rpms. So I'm guessing what shoebox said would be a good idea.

 

The Melling IS-55E shaft comes with the metal coupler on it and you can get it at Autozone. You can use the GM white spring (p/n 3848911) in the standard Melling pump from what I am told. There should be no reason to change oil pan that I can see.

 

Why does he need a higher pressure spring in the pump? I have seen a Melling M55 std. volume pump on the oil pump dyno and it made over 70PSI...what does the white spring change it too? Wouldn't you think that 70 is high enough?

 

It depends on the bearing clearances. A new engine with tighter clearances will usually have higher pressure. I figured a 140k mile engine could use some help with pressure. It was just a suggestion. Nobody has to follow it.

 

Ohh, just curious. Probably a good suggestion then. I was just curious because i thought 70psi was kinda high, thats all. I am still curious how high the pressure would be with the white spring that everyone talks about.

 

In my BB Ford's builds they run 100-105PSI out the back door.One runs 9.2's with a 150 shot.
They won't live on 70PSI.

 

Sorry I should have told you I am replacing the entire internals to forged and replacing the bearings.