does the late model tray help support the mains?
When I swapped in a crate motor two seasons ago (i think it was a 1999 or perhaps 2001) I noticed that it didn't have the same pan/windage tray as the 2004 motor that I took out. The later model tray seemed to have more structure to it. I figured it was to help saddle the mains, so I swapped the late model pan/tray into the 2001.
I am now in the process of refreshing the two motors. My goal is to have 2 completed longblocks. I am unsure I need to look for a second late model pan/tray to complete my spare motor. Is there any consensus as to if these later model pans/trays are needed in a moderate boost /track application? |
Edit: I apparently have no idea what I'm talking about. Carry on.
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The MBSP (main bearing support plate) appears to be designed to help support the mains, but there's at least one case of someone (Savington) blowing out a main cap while using the stock bolts and the MBSP. So there's probably a case to be made for running it *and* ARP studs (which requires modifying the MBSP to fit), but it's not a substitute for the studs.
I didn't bother on my motor. Note that the oil pan is different to accommodate the MBSP, so you need to source one of those too if you want to add it. --Ian |
Great. I'll just run with the old style tray/pan. It sounds that it would work easier with the ARP studs. Thx for the tip.
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not worth the hassle
better to get arp mains like Ian said |
I run both. Not that I know if the tray actually makes any difference. The tray will require some grinding for the studs.
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MBSP did me no favors. I much prefer the 99 pan since it takes no work to make the ARP studs fit. ARP mains are just as important as forged rods in a built BP, IMO.
It's important that you run a matching pan/windage tray, since the pans are machined differently. The front/rear seals are also slightly different between the two pans, a detail that few aftermarket seal companies have picked up on. |
I went the late windage and oil pan with arp hardware route on my current motor and spare motor, modified the windage tray to clear the studs and taller nuts, no problems so far
https://cimg2.ibsrv.net/gimg/www.mia...ef8b9189d9.jpgDrilled holes on the windage tray to clear the studs and taller nuts |
Originally Posted by Savington
(Post 1402648)
MBSP did me no favors. I much prefer the 99 pan since it takes no work to make the ARP studs fit. ARP mains are just as important as forged rods in a built BP, IMO.
It's important that you run a matching pan/windage tray, since the pans are machined differently. The front/rear seals are also slightly different between the two pans, a detail that few aftermarket seal companies have picked up on. |
Answered my own question
1997 (no MBSP): B6F410427 B6F410428 2002 (MBSP): B54110427 B54110428 |
B6F4 is 94-00, B541 is 01-05. Ain't nobody got time for 90-93
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at what point would you say that main studs are needed?
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Originally Posted by mmmjesse
(Post 1402800)
at what point would you say that main studs are needed?
The motor in Rover right now is a bare-bones build, what I would call a "stage 1" shortblock. OEM oil pump and pistons, but rods and ARP mains. |
Originally Posted by codrus
(Post 1402611)
Note that the oil pan is different to accommodate the MBSP, so you need to source one of those too if you want to add it.
--Ian |
Ah crap. Can anyone confirm this? I had 2 motors, one MBSP and non MBSP, and I only have one dip stick in the garage...
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Originally Posted by aidandj
(Post 1403271)
Ah crap. Can anyone confirm this? I had 2 motors, one MBSP and non MBSP, and I only have one dip stick in the garage...
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Originally Posted by aidandj
(Post 1403271)
Ah crap. Can anyone confirm this? I had 2 motors, one MBSP and non MBSP, and I only have one dip stick in the garage...
(edit, you can probably do that with the pan sitting on the ground, actually) --Ian |
I thought as long as the dipstick matches the tube to which it belongs it's otherwise interchangeable between pans.
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Originally Posted by aidandj
(Post 1403271)
Ah crap. Can anyone confirm this? I had 2 motors, one MBSP and non MBSP, and I only have one dip stick in the garage...
99-00 dip stick: BP4W-10-450 01-05 dip stick: BP4W-10-450 According to the Priority Mazda Parts store. |
Originally Posted by psyber_0ptix
(Post 1403277)
I thought as long as the dipstick matches the tube to which it belongs it's otherwise interchangeable between pans.
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