Here is the Mazda part info for the BP engine (only the parts different than a street version of the BP) in the world rally championship version of the Mazda 323 GT-R:
https://www.miataturbo.net/forum/pic...de_engine2.jpg
http://www.mazdafun.com/pictures/gtr...de_engine2.jpg

Code:

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No. Part no. Description Qty Remarks
1 BBYV 18 300 Alternator 1 120A
2 BBYV 18 11Z Spark Plug 4 Heat Value #9
" BBYV 18 110          " 4 Heat Value #10
3 B6N7 14 116 Spring, Oil Pump 1 Oil Pressure 6kg

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http://www.mazdafun.com/pictures/gtr_upgrade_engine.jpg

Code:

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No. Part no. Description Qty Remarks
1 BBYV 11 090 Piston Ring Set 1 ..
2 BBYV 11 102 Piston 4 Mahle make
3 BBYV 11 401 Crankshaft Pulley 1 �148
4 BBYV 11 271 Head Gasket 1 Metal
5 B6N7 11 225 Conn. Rod Metal 1 TI � 1.5
6 B6N7 11 551 Crankshaft Metal 1 TI � 2.0
7 BBYV 11 391 Crankshaft Metal-UP 2 ,,,,,,

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http://www.mazdafun.com/pictures/gtr...de_engine1.jpg

Code:

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No. Part no. Description Qty Remarks
1 BBYV 12 425 Camshaft Pulley 2 Adjustable for Valve Timing
2 BBYV 12 42X Camshaft, Intake 1 Camshaft Base
" BBYV 12 420              " 1 Machined
3 BBYV 12 44Y Camshaft, Exhaust 1 Camshaft Base
" BYV 12 440              " 1 Machined
4 B6N7 12 183 Tappet 16 ..
5 B6N7 12 551 Adjust Disc 16 T � 1.00 > T � 2.00
6 B6N7 12 113 Valve Seat-Upper 16 Reinforced
7 B6N7 12 120 Valve Spring Set 16 Double Type
8 B6N7 12 123C Valve Seat-Lower 16 Reinforced
9 B660 12 123A Valve Seat-Lower 1 ..
10 BBYV 12 111 Inlet Valve 8 ..
11 BBYV 12 121 Exhaust Vakve 8 ..

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There must be something to it.....huh

Is the above part number for the spring a current one? I think I will order the 6 kg spring when I get my billet oil pump gear

Email finishline and see if they can get you one.

Yeah, part numbers are current. The Mazdaspeed Motorsports site was showing they had few in stock few months ago (and what they show is the entire regular Mazda warehouse inventory for USA) but then when I posted the part number in this forum suddenly the springs went on back order - I guess few people who read my post here snatched them :laugh:

SPRING, OIL RELIEF Part No: B6N7-14-116 $10.45

Well regardless of how it shakes out, where Matt andrews car is making 390ft/lbs of torque. The stock pump can't hang with pressure. The high flow pump pushes the limit from 3000 or so on. Thats when the turbo is starting to spool, and when the torque hit comes on. Notice how the difference is much much larger in the lower rpm range of that graph, and it starts at 4500rpm.

That graph looks like it was made with a worn out stock pump. My OP is at 50psi by 4500 and 60psi at 5000. I have always been told that 10psi per 1k rpm is perfect. Even on 1k+ WHP v8s.

I'm just trying to show that there is a place where the high flow fits, but there is also a place where the std width fits. Hell you sell both, and I just bought one from you myself. Don't think I'm arguing with you because I'm trying to disrespect your product. Quite the contrary.

I don't think that at all, I usaully argue to learn.

From a bearing stand point the bearing needs the most support at peak torque, and at peak rpm. So whever the maximum torque is coming on at you want maximum pressure present, and considering how the Miata's work you want that maximum held all the way out if you can help it. Per cubic inch a 1000hp v8 doesn't have anything on this little four cylinder.

I think I will be installing one of those springs while my motor is out. Thanks for the info.

Can someone ban this guy?

does anyone happen to have the part number for the phillips head bolts which hold the oil pump cover to the housing? i got all of them out, but one of them wound up partially stripped and i'd really like to replace it.

edit:
in case anyone is wondering, i found the part number for the screws. it is: FE1H-14-124

FWIW I measured the oil pump spring

It exerts 3.55 kgf @ 5 mm of compression
= 40 lbf/in

diameter of piston = 16 mm = 0.4 in^2

pre load of spring at rest = 10mm

piston cracks open with an additional 3.3 mm ... total 13.3mm ... that's 53 psi

each mm of motion is an add'l 4 psi

The piston has a wear mark which suggests a "wide open" position which has an additional 3mm of movement. This is 65 psi.

For every additional 1 mm of shimming, it adds 4 psi.
If you add a 2 mm shim it'll crack open at 61 psi, and it'll be 73 psi at the "wide open" position.