TaffyTim 6 Posted April 8, 2006 Im buying my 1st Mi16 (YES )in a couple of weeks and it comes with an alloy sump. Ive been reading up on the difference between this and the steele sump and I was just wondering: Are all alloy sumps the 'finned' type or are htere finned alloy sumps and non-finned alloy sumps? Am I right in thinking that the fin's are on the outside of the sump and will be noticable if I pop my head under the car? Thanks Share this post Link to post Share on other sites
Ryan 99 Posted April 8, 2006 AFAIK all the alloy sumps are finned. I think it's to improve strength as well as provide extra cooling. The fins are easily visible from below: Share this post Link to post Share on other sites
TaffyTim 6 Posted April 8, 2006 ta, thats roughly what i thought they would look like, nice to see a pic to confirm it. Share this post Link to post Share on other sites
eddie_1.9 1 Posted April 8, 2006 My s16 block has a alloy sump without fins. It's got Air con but i don't know if that makes a difference. Obviously it will have the mountin lugs for the compressor but u dont have to use em. Share this post Link to post Share on other sites
Jonmurgie 2 Posted April 8, 2006 Do you know what car the Mi has come from? I believe that all alloy finned sumps are from the 405 and all tin smooth sumps are from the BX incase you didn't know Share this post Link to post Share on other sites
jackherer 543 Posted April 8, 2006 Do you know what car the Mi has come from? I believe that all alloy finned sumps are from the 405 and all tin smooth sumps are from the BX incase you didn't know I've got alloy sumps out of a few BXs... Share this post Link to post Share on other sites
TaffyTim 6 Posted April 8, 2006 Do you know what car the Mi has come from? I believe that all alloy finned sumps are from the 405 and all tin smooth sumps are from the BX incase you didn't know No I dont know what car it came from and from what you've just said that answers my question. Not all alloy sumps are finned. From what I've read on this site I understand that the fins dont make much of a difference with the cooling of the oil (on a track day), its more the material that the sump is made from that conducts the heat away from the oil. Share this post Link to post Share on other sites
huxley309 0 Posted April 8, 2006 True but the steel sump are much easier for fitting a baffle into Share this post Link to post Share on other sites
Super Josh 4 Posted April 8, 2006 My s16 block has a alloy sump without fins. It's got Air con but i don't know if that makes a difference. Obviously it will have the mountin lugs for the compressor but u dont have to use em. The Aircon shouldn't make any difference, as your engine is an XU10. The Aircon compressor is mounted on the block and not on the sump, like the XU9 lumps, which is why they have the Ally sump. Josh Share this post Link to post Share on other sites
TaffyTim 6 Posted April 8, 2006 True but the steel sump are much easier for fitting a baffle into True, but Im not going to bother with a baffled sump (for now). From what i understand from my readings, the oil starvation occours due to the oil not getting back to the sump quick enough and not because the sump is baffleless. There seem to be a few people stating that they still get oil starvation even with baffles in their sump. From what ive read it seems the steel sump can result in really hot oil on trackdays. Hopefully with an alloy sump and a water cooled oil cooler my oil will be ok Share this post Link to post Share on other sites
huxley309 0 Posted April 8, 2006 Ive got an oil/water cooler but also have a second fan rigged up should i need it Share this post Link to post Share on other sites
TaffyTim 6 Posted April 8, 2006 Ive got an oil/water cooler but also have a second fan rigged up should i need it Nice, Do you find that its needed much. Do i take it that you just have it for precaution in the summer months? Share this post Link to post Share on other sites
Ahl 4 Posted April 8, 2006 Some extra oil and sump baffles will go a long way to helping the oil starvation issues, retentive head or not. I'd be a lot more worried about this on a trackday rather than the oil heating up slightly more due to the sump material. Share this post Link to post Share on other sites
TaffyTim 6 Posted April 8, 2006 Some extra oil and sump baffles will go a long way to helping the oil starvation issues, retentive head or not. I'd be a lot more worried about this on a trackday rather than the oil heating up slightly more due to the sump material. Oh that is suprising. I have no experience at all so I respect all opinions. People are doing trackdays without baffles though arent they? Share this post Link to post Share on other sites
huxley309 0 Posted April 8, 2006 (edited) Well mi's are funny things...i know ones like my old one that you can rag all the time and dont get problems with oil surge whatsoever and some sufffer really badly As for the fan its mainly as a precaution...i havent wired it into this 309 yet as ive only just got her running but its in there should i need it....only when im stationary in scortching summer months did i ever need it Edited April 8, 2006 by huxley309 Share this post Link to post Share on other sites
KRISKARRERA 2 1 Cars Posted April 9, 2006 Aircon compressor is mounted on sump on xu10s as well. Share this post Link to post Share on other sites
Super Josh 4 Posted April 9, 2006 Aircon compressor is mounted on sump on xu10s as well. Is that only on the XU10J4s then Kris? As my old XU10J2TE 2.0 Turbo had it mounted on the block. Josh Share this post Link to post Share on other sites
petert 554 Posted April 9, 2006 The reality is that it doesn't matter whether you have steel, alloy finned or alloy non-finned. If you can get it hot enough you need to do something about it. Whether its fitting a 13 row cooler, or upgrading from a 13 to a 25 row, the point is your the guy with your foot on the throttle watching the oil temp guage. Do something about it before you cook it. Share this post Link to post Share on other sites
TaffyTim 6 Posted April 9, 2006 Ok this thread has been satisfied. It really was supposed to be 2 quick questions on sumps. Thanks all for the reply's. I must stop wandering off topic Share this post Link to post Share on other sites
