budget racer

i am rebuilding a 98 ls1. in reading several books about this one of them says to drill half inch holes in the lifter trays for better oil drain. is this a good idea and if it is where should they be drilled? thanks for your help.

cowboysfan

I did that mod to mine. supposed to reduce oil aeraton. no problems here, and going on 60k+ miles since.

PREDATOR-Z

I would change your old ones for LS2 tays and that is it.

sabersaw30

iTrader: (10)

I have heard to drill holes too.My question is why did gm not drill holes?If it ain't broke don't fix it.

The Alchemist

iTrader: (19)

The need to drill holes comes when you do sustained high rpm running like in road racing with long straights. Fact is though, if that's your intention, then you should be running a dry sump system as well.

vettenuts

iTrader: (4)

Once the tray fills, it spills over the top. In my mind, why weaken the tray.

01ssreda4

iTrader: (96)

agreed................

budget racer

sounds like there is no for sure right answer. thanks for the responses guys. i guess i will debate this till i put them in tonight and make my decision then. thanks again.

JRENIGAR

iTrader: (37)

Do what this man says and call it a day already...

motorsports601

Do the ls2 have holes in it? What's the difference?

LS1aiden

I drilled mine and put LS2 trays in also. And the LS2 trays are just stronger and built better like always.

CamaroRick

iTrader: (24)

i have a set of 1000 mile 98 lifter trays for sale if you accidentally mess up yours.

Ive heard the same thing about drilling em. I would have done it if i wasnt running link bar morels

SOMbitch

iTrader: (8)

LS2 trays are $30 so doubt you will find any takers.......

LS1-450

iTrader: (33)

As noted, LS2 tray; although, if road course driving or sustained high rpm driving a lot, drill the trays, 3/8" on the low side or side nearest you when standing next to either side of the engine. Drill just above the strengthening ribs, (2) holes per tray. What this does, is to allow oil to drain back to the pan sooner than it would having filled the whole tray before over flowing. Dry sumps aren't always effective for road course driving. Even vettes running dry sumps have had oil starvation engine failures.

I run my LS1's w/ drilled lifter trays, oil pans (wet sumps) & pre-oilers on road courses while sustaining 1.8-2.1g long sweeping turns.

trans_am7935

iTrader: (15)

i just got the LS2 lifter trays, through them in and called it a day, no reason for me to drill them. it is your engine so your choice.