twin scroll sumps
 

i see a few imprezas that have been rebuilt and alot of them list a twin scroll sump, what are the advantages of this?

mainly hawkeye i see with this.

cheers

Your 2.5 uses the same basic sump as the equivalent T/scroll so no benefit at all

most likely simply people not understanding what they have or being led down the garden path......

thanks alyn :)

Shreksta, I think the ones you see mentioning the TS / 2.5 sumps are 2.0/2.1 cars, no?

Mine's got a 2.5 sump in it, as I'm under the impression that they offer (slightly) better oil control on track.

i think ive seen one 2.0 car with it but mostly 2.5. had a look through some of my quotes for my rebuild and a couple of companies have put twin scroll sump on aswell.

Sir,

i guess ts and 2.5 sumps are identical but not same

are 2.5 sumps better then ts sumps or are these changes because of material costs?

what do you think about ?

regards,

semih

They were standardised with the arrival the 2.5L engine MY06 onwards and the oil pickup was changed at the same time.

11099AA150/151

https://importcarparts.co.uk/picture...ump-panl-2.jpg

there was an earlier version 11109AA130/131

https://ministrant-sponge.000webhost.../TS%20sump.JPG


https://cache.nebula.phx3.secureserv...0-7555e2d56264

In theory the original TS sump is the 'best' std set-up but very little between them......

whats the deal with the pick up pipes? are the 2.5 the ones prone to fracturing?

Hope this helps.