Engine Swap Forum

Hey guys, I'm starting to get interested in dry sump oil systems for the VQ, I haven't seen it done yet either.  I'm a newb to them so any body want to school me on the idea behind them and their pros/cons for a street car? 

 

thanks,

Fred

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Instrument Cluster and Speedometer Repair

Well there are tons of pros and only a few cons if you ask me.

Pros
1. More oil - as in quantity, a typical dry system holds 8 qrts
2. Crankcase vacuum- motors suck air out of crankcase, generating vacuum, reducing oil cling to crank and piston reciprocating effort. In otherwords, more horspower, somewhere in the range of 5-7%.
3. Better oiling - high performanace oil pump(s)
4. mount your oil filter anywhere you want!
5. I know there are more, let me do some book reading

Cons:

1. more weight - pumps, tank and more oil
2. deciding where put the oil tank

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S13 Fastback...putting the chassis together.

Suspension before power!

Pros

...
5. Allows use of shallow oil pan (increased clearance, lower mounting for engine)
6. Consistent oiling. Considered to be unaffected by high lateral/ longitudonal forces.
7. Potential "prioritized" oiling (usu req's extra machining & 2 or more pressure stages)
8. More easily adjustable oil pressure & flow rate (pulley ratios)
9. Allows use of low tension piston rings (low friction = more hp)

Cons

3. COST
4. (street app) More susceptible to major failure (road debris can damage belt or lines causing
                       catastrophic damage compared to cosmetic damage on an oil pan)
5. Braided hoses tend to 'sweat' (gathers dust).
6. Fittings also tend to 'sweat'.
7. Relative complexity
8. Advantages tend to be uneffective on typical street 'rod'.

Sooner or later, someone will bring up factory supplied 'dry sumps' (LS7, Porsches, Lambos, Ferraris, etc). Feel free to investigate those particular setups and consider the options for the VQ before drawing a parallel...

I hate sounding pessimistic...

Kurt

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Argh... guess I'll stick w/ the plan...

Has anyone seen it done on a VQ? 

 

 I don't think I can justify the cost and extra complexity for this project, I think I'll add it to the list of must have's for if I can ever go all out on a VQ

 

Fred

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Instrument Cluster and Speedometer Repair

I've seen a couple race engines with them but never really investigated the details as I had planned to build a street car at the time.

I'll make additions to this post as I develop mine...

Kurt

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Argh... guess I'll stick w/ the plan...