Dry sump vs. Wet sump

[motomaster_707]

I am by no means a motor guy. I have a 351 windsor that I am putting a 408 stroker kit in. I plan on racing my truck in the sportsman class to start but eventually move up to class 8 with experience. Which route should I go, dry sump or wet sump. What are the advantages of a dry sump? Thanks for the help in advance.

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[MARXICO]

A dry sump motor gains about 25 hp from the crankshaft not being in contact with all of the oil stored in the oil pan the oil pump is external and pumps about 3 gallons of oil that is sometimes filtered twice once going into the pump and one after then into a external oil cooler and sometimes into a heat exchanger that keeps the oil and water at close to the same operating temperature
You can adjust the oil pressure on a external oil pump also the rocker arm assembly now can be sprayed with oil instead of splashed by oil

Definition of some times;
Application depends on space , experience and budget ,also keep in mind each cooler ,filter and heat exchanger reduces flow that ultimately reduces horsepower….what do you want Hp or reliability

[43mod]

lots of dry sump engines blown by the loss of the belt. If you go wet sump run a 3 qt accumulator and it will keep the bearings in good shape.

[Samco Fab]

We have raced with wet sump V8's for years, as long as the rpm is not ridiculous, the wet sump is lighter, cheaper and reliable.

[pdailey]

lots of dry sump engines blown by the loss of the belt. If you go wet sump run a 3 qt accumulator and it will keep the bearings in good shape.

Define "lots". Occasionally should be a more correct term. We sell a lot of pumps to the off road world and I can't remember the last time getting one back after a blow up from loss of the belt.


To the OP. All depends on your pocket book. You can make the dry sump work for you. There is horsepower there. You just have to do the right things.

[Jerry Zaiden]

For what its worth...

We started out with our LS based engine with the internal dry sump pump. Broke a few timing chains then went wet sump so we can run a dual timing chain. Timing chain held up but bearings were not so good even after 600 hard miles. We then contacted Dailey Engineering (worlds best dry sump stuff) and we have had zero issues due to oiling. Bearings always look brand new. As for power there were not any significant gains the gain is the amount of oil the system holds, the oil pressure and the amount of oil etc. As for the belts coming off etc. Well we run a serpentine system and if you lost a belt you would lose an alternator and all power steering. Losing a belt is the least of your worries.

I would talk to the guys at Dailey Engineering. What you spend up front will save you ten fold in the long run.

[idealer]

Dry sump can also hold more oil, be sure NOT to buy a used pump unless you know the party well, most used pumps for sale have had a lot of crap go through them... I would stick with daily or stock car products in la habara. I just got a nice new 4 stage pump for 700 cash from them.

[43mod]

lots = more than i have seen brake a wet sump drive. there are a lot more wet sumps than dry. The hp advantage will only exist at higher rpm ranges that most lower class v8 vehicles wont get to. there is no question a properly set up dry sump is a good thing in the right application. A wet sump with an accusump is much more on the KISS method. You still need a good pan / pickup along with the right block prep to make it work its best

[Jerry Zaiden]

lots = more than i have seen brake a wet sump drive. there are a lot more wet sumps than dry. The hp advantage will only exist at higher rpm ranges that most lower class v8 vehicles wont get to. there is no question a properly set up dry sump is a good thing in the right application. A wet sump with an accusump is much more on the KISS method. You still need a good pan / pickup along with the right block prep to make it work its best

I have seen accusumps fail causing people to lose engines as well. Losing a belt is because people don't shield the belts from rocks and debris. Belts don't just fail/fall off for no reason.

Dry sump is the best way 110% for many reasons. And a wet sump in off road racing is not a good way to go. This is from experience.

[Capitol Raceworks]

much advantages on a stroker 4.3 sohc going dry sump? or would it not be worth the gains?