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Old 07-12-2012, 01:54 PM   #1
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Default Interchangeable parts? BP Motors NA/NB

I've been refreshing a 99 motor and I keep running into small discrepancies. If I look up parts from the dealer or any auto part stores I find them to be different from year to year. A good example would be rings. If i go to rock auto and search for rings for a 94 It lists 4 different options for standard sized rings. If I look up a 99 it shows 1 option. Same goes for oil pumps. When I had the dealer look up some parts like said piston rings they had 2 different prices. The part number for the one set of rings for the 99 matched a set of rings for the 94.

Using common sense I've been able to order the correct parts. I have been screwed enough times by morons grabbing ---- off the shelf and not checking the box to the point where i'm actually quite paranoid and skeptical every time I order or buy anything.

So when rebuilding a bottom end is there anything notably different between the BP motors? The only thing i have left to buy is my oil pump and possibly some new arp studs/caps.

I have a 2560 and don't really plan on being over the 250hp 200ish tq mark. I don't have the money for forged rods, pistons, boundry oilpump.

Anyone have a recommendation on where to get a decent oil pump? It's tempting to buy this Oil Pump but the price scares me and I have never heard of the brand. Also do i need to replace the factory head bolts? I think i read somewhere on here that they are known to break when re tightened. Also do i need to replace the studs/nuts on the rods? Any recommendations as what to use? I don't have much money left for this build so i'm trying to hang on to every last dollar I can without making the build any less reliable.
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Old 07-12-2012, 02:07 PM   #2
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Why not use the BP oil pump that came with your motor?


The rings should be compatible, year-to-year, but I would still choose the ones mazda specs for your year motor. The BP remained almost unchanged from 1994-2005. All the heads/bottom ends are compatible. I don't see why any other parts would not be compatible.



Remember, you are building a motor. Better to let it sit on the engine stand a little longer while saving for the parts you need, than jump the gun an instal a ticking time bomb. That being said; a 100% stock BP4W could meet you power goals, so why is the motor apart in the first place?
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Old 07-12-2012, 02:14 PM   #3
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uh

yeah.

what are you doing??? why take apart and rebuild motor with factory parts?

so much fail.
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Old 07-12-2012, 10:00 PM   #4
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Quote:
Originally Posted by 2ndGearRubber View Post
That being said; a 100% stock BP4W could meet you power goals, so why is the motor apart in the first place?
It's apart for 2 reasons.

1) it is from a salvaged Miata (origin unknown).
2) it failed leakdown.

The leak down failure i believe to have been from the head but while I had the head off and motor out figured i may as well make sure nothing else was wrong.

I suppose I could save up and put some forged internals in it but I figured stock would meet my power goals anyway. I cracked a ring on my 1.6 and I figured it was a perfect time to upgrade.

I do feel like I should at least put some china rods in but do I really need to at my power goal? After 250whp aren't there a bunch of issues like oil pump, transmission, traction, not to mention my clutch is only good to about 220-230tq. I have never tracked the car. I still need some other things like a new front sway bar, roll bar, body work, paint, new radiator.

I figured by the time i had all that other stuff taken care of i'd be ready for a new bottom end.

thoughts?
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Old 07-12-2012, 10:04 PM   #5
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Id don't know if you're a man or woman, but us men get addicted to torque after the 1st drive and want more. So yeah, always overbuild for your goals.
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Old 07-12-2012, 10:11 PM   #6
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Quote:
Originally Posted by krissetsfire View Post
I've been refreshing a 99 motor and I keep running into small discrepancies. If I look up parts from the dealer or any auto part stores I find them to be different from year to year. A good example would be rings. If i go to rock auto and search for rings for a 94 It lists 4 different options for standard sized rings. If I look up a 99 it shows 1 option. Same goes for oil pumps. When I had the dealer look up some parts like said piston rings they had 2 different prices. The part number for the one set of rings for the 99 matched a set of rings for the 94.

Using common sense I've been able to order the correct parts. I have been screwed enough times by morons grabbing ---- off the shelf and not checking the box to the point where i'm actually quite paranoid and skeptical every time I order or buy anything.

So when rebuilding a bottom end is there anything notably different between the BP motors? The only thing i have left to buy is my oil pump and possibly some new arp studs/caps.

I have a 2560 and don't really plan on being over the 250hp 200ish tq mark. I don't have the money for forged rods, pistons, boundry oilpump.

Anyone have a recommendation on where to get a decent oil pump? It's tempting to buy this Oil Pump but the price scares me and I have never heard of the brand. Also do i need to replace the factory head bolts? I think i read somewhere on here that they are known to break when re tightened. Also do i need to replace the studs/nuts on the rods? Any recommendations as what to use? I don't have much money left for this build so i'm trying to hang on to every last dollar I can without making the build any less reliable.
as far as rings I have no clue about the differences but i can tell you in 94 there were 4 BP motors in 4 different model cars, in 99 theres only one.

94:
protege LX
protege DX (single cam version)
escort GT
miata

99:
miata
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Old 07-12-2012, 10:26 PM   #7
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Quote:
Originally Posted by 18psi View Post
Id don't know if you're a man or woman, but us men get addicted to torque after the 1st drive and want more. So yeah, always overbuild for your goals.
I was driving a 1.6 so men drive miatas? you must be a ***.
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Old 07-12-2012, 10:33 PM   #8
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Originally Posted by 2ndGearRubber View Post
Why not use the BP oil pump that came with your motor?
I would but that seems kind of frowned upon and generally bad practice. anyone else have an opinion on this?
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Old 07-12-2012, 10:48 PM   #9
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I was driving a 1.6 so men drive miatas? you must be a ***.
Yes, they do. Ask your husband.
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Old 07-12-2012, 11:44 PM   #10
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Yes, they do. Ask your husband.
I haven't met him yet. Maybe one day @ a miata meet..
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Old 07-12-2012, 11:58 PM   #11
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People like you should be exterminated.

You are a bad person.

How can you not build your motor while it is opened up?

This seriously hurts my feelings.
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Old 07-13-2012, 12:14 AM   #12
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would it make you feel better if i put some china rods in?
trust me i want to build it too. i'm having a tough time justifying it though since my power goals are obtainable on stock :-/
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Old 07-13-2012, 12:23 AM   #13
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Originally Posted by Faeflora View Post
People like you should be exterminated.

You are a bad person.

How can you not build your motor while it is opened up?

This seriously hurts my feelings.
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Old 07-13-2012, 12:25 AM   #14
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Quote:
Originally Posted by krissetsfire View Post
would it make you feel better if i put some china rods in?
trust me i want to build it too. i'm having a tough time justifying it though since my power goals are obtainable on stock :-/
250whp/230wtq on a Mustang Dyno or you will be banned. 10lb/hp or you cannot post here.
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Old 07-13-2012, 12:29 AM   #15
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Quote:
Originally Posted by krissetsfire View Post
would it make you feel better if i put some china rods in?
trust me i want to build it too. i'm having a tough time justifying it though since my power goals are obtainable on stock :-/

Your power goals suck.

You will lose to a stock CAMARO. You will lose to a V6 mustang. You will lose to a WRX with an exhaust.

Losing sucks. Especially after you spent all this time building your motor and some stock motored fool with bolt ons rapes your baby.

Trust me. I have gone 250, ~350-400, and 500+++??? hp. Enough is never enough.

It is good to at least have the choice of more power for a measely $1000 extra

china rods
supertech pistons
billet oil pump

300-400HP is WAYYYYYYY more fun than 250.
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Old 07-13-2012, 12:35 AM   #16
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250whp/230wtq on a Mustang Dyno or you will be banned. 10lb/hp or you cannot post here.
Is that supposed to be my justification? BUT I CANT LIVE WITHOUT GAY AND CATS!!!
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Old 07-13-2012, 12:39 AM   #17
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Originally Posted by Faeflora View Post
300-400HP is WAYYYYYYY more fun than 250.
and yet you made fun of me for having "only" 300
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Old 07-13-2012, 12:43 AM   #18
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Originally Posted by hustler View Post
250whp/230wtq on a Mustang Dyno or you will be banned. 10lb/hp or you cannot post here.

Super STOCK STOCK STOCK

2012 mustang GT is under 9lb/hp. to the wheels
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Old 07-13-2012, 12:43 AM   #19
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Is that supposed to be my justification? BUT I CANT LIVE WITHOUT GAY AND CATS!!!
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Old 07-13-2012, 02:47 AM   #20
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Lol
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