Pete walsh

Hi

Can I stick a Ls7 dry sump and oil pump etc on a Ls3? Thus making it a dry sump?

Cheers

scatillac

iTrader: (12)

The stock wet sump crank snout is not long enough for the LS7 oil pump drive/front cover/harmonic balancer assembly.

Pete walsh

so is there a way around it or is that the end of it?

racer7088

You would also have to get a long snout LS7 style crank and the LS7 front cover etc. along with the pan.

Pete walsh

will a ls7 crank do or will i have to get a custom crank?

racer7088

Yes the LS7 crank is what you ned if you want to run the LS7 stuff. If you aren't using the LS7 crank and rods you will need to get an aftermarket crank like the callies or Eagle etc.

Pete walsh

So all I need is a ls7 crank and rods and the front bits etc?

are you sure the ls7 crank will fit with no probs if so that will make life alot easier.

racer7088

Yes the LS7 style crank is no different besides the longer snout to drive the extra long oil pump. Of course the stock one has a 58 tooth reluctor on it so you would have to get your crank for whatever computer you have.

Pete walsh

Thank you,

So what I need to do the conversion is:
LS7 Crank
LS7 rods
LS7 Sump
Ls7 Oil pump
Ls7 front cover [whats that?]
LS7 balancer
The ls3 comes with 58 reluctor so thats OK


Is that it??

Jontall

The LS7 sump is not good... Use this one:

AU N EGL

I agree. If your going to put a dry sump on your LS3, do a real dry sump. The ARE or Daily drysump systems

Pete walsh

why isnt the ls7 sump any good [out of interest]

AU N EGL

Not a true dry sump. More of a damp sump.

Guys with true HP LS7s not street vettes have put in the ARE pan and LPE tank. Or those building a 402 or 427 road race motors use the Daily dry sump, but that adds 6-7K to the build cost

Pete walsh

cheers thank you

If I was to do it is the above all i need or do i need alot more things due to the snout been longer? i.e. the front accessorys of a ls7?

See5

iTrader: (53)

The LS7 crank is not set up to balance heavier rods and pistons. This may sound minor but trying to get enough weight into the crank has been dicey. The ti rods are light and the pistons have a odd pin size.
The second oil pump (return to tank ) on the crank is not comparable to a real dry sump setup. No substantial vacuum created.
In the end may not consider this worth the noted weak dry sump benefit.

You could alternatively and easily run an Accusump http://www.accusump.com/ with likely better oiling insurance.

Tavarez

would an accusump be a doable alternative or are you good with spending 6-7k?

AU N EGL

absolutely. I run a 3qt accu-sump with oil cooler. Costs are much lower then a dry or damp sump.

randallprince

In what instances will the dry sump be required whereas an ACCUSUMP won't be enough? What sort of g-forces are required to warrant the cost of a full dry sump system like ARE's?

Beaflag VonRathburg

iTrader: (176)

I know this is an old thread, but this is pretty much what I'm doing with my 408 build. I have the crank, timing cover, oil pump, pickup, and oil pan. I'm still thinking about getting one of those ARE pans and have them send me a tank and lines at the same time.

Here's a thread that pretty much covers exactly what you need to use the LS7 dry sump setup:
https://ls1tech.com/forums/generatio...-pump-ls1.html