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Old 07-05-2008, 05:17 AM   #1
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Default BP-D Engine Building Help

Hi im currenty building a Mazda BPD engine out of a Mazda 323 GTR, i know they run the same engine (BP) as a miata so i thought this would be a good place to get some help,
my current setup is,
94' block
bignose crank
B6-T Rods
Oversized factor replacement pistons
Non turbo bp head(no port restricter) with BPD camsafts
VF22 subaru turbo

Now im going to be using this motor on tarmac rallies/sealed sprints etc.
Im looking into engine balancing and wondering if the 'BP' engines have much trouble up in the high rev range, also im looking at making my rev limit higher..any tips/Help on these issues would be very helpfull
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Old 07-05-2008, 10:31 AM   #2
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if you want it to rev high willingly and reliably, you need lighter internals. also I don't know which rods you have, but some of the -T rods are the same as the weak miata rods, and some are beefier but MUCH heavier. so far, I think you're off in a wrong direction to your goals.
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Old 07-05-2008, 11:58 AM   #3
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Heres a pic of the rods and pistons i got

http://file040a.bebo.com/14/large/20...046623911l.jpg
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Old 07-06-2008, 10:48 AM   #4
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Bump..

am looking into a set of JE forged rods and pistons...am i on the right track?
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Old 07-06-2008, 02:09 PM   #5
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Originally Posted by MadazBPD View Post
Bump..

am looking into a set of JE forged rods and pistons...am i on the right track?
bump...

in for banning this queer.
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Old 07-06-2008, 02:24 PM   #6
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Originally Posted by MadazBPD View Post
Bump..

am looking into a set of JE forged rods and pistons...am i on the right track?
JE makes good gear, but they are way too expensive. Check out supertech. They sell some more reasonably priced rods and pistons which are light, strong, and so far reliable.
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Old 07-06-2008, 04:00 PM   #7
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JE makes good gear, but they are way too expensive. Check out supertech. They sell some more reasonably priced rods and pistons which are light, strong, and so far reliable.
is anyone actually up and running on them? I have a set but the motor hasn't fired over yet.
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Old 07-06-2008, 04:04 PM   #8
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Originally Posted by Arkmage View Post
JE makes good gear, but they are way too expensive. Check out supertech. They sell some more reasonably priced rods and pistons which are light, strong, and so far reliable.
JE pistons aren't really any more expensive than any other piston.
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Old 07-07-2008, 03:19 AM   #9
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im not worried about the price of JE's can get them very cheap, just wanting some advice
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Old 07-07-2008, 10:13 AM   #10
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ill take the old rods when you are done....
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Old 07-07-2008, 10:14 AM   #11
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Not for sale

only wanting advice!!!! not wanting to sell parts

Last edited by MadazBPD; 07-07-2008 at 10:20 AM. Reason: added
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Old 07-07-2008, 10:29 AM   #12
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Dude, without more information and a proper sig and profile info, you will not get any help here, so stop being a dick and introduce yourself the right way and we just might help you.
There is also this great tool, click here!
Search, read, repeat, 3-4 months down the road, ask again.


Just get some ETD rods, and tri-coat those pistons. Invest in a billet oil pump, and some lighter valvetrain. Stay on the sane side of boost, and you should be fine.
I am also a big believer in balancing the rotating assembly, but that's your call.
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Old 07-07-2008, 10:30 AM   #13
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Not for sale

only wanting advice!!!! not wanting to sell parts

you'll have no use for them...and i will.
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Old 07-07-2008, 10:31 AM   #14
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you'll have no use for them...and i will.
yeah i will, ill use then in my street car when i rebuild the engine
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Old 07-07-2008, 10:37 AM   #15
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ok well to introduce myself, my names Jordan im 20 and im from New zealand, ive built a few mazda bp motors before but this is my 1st dedicated race engine,Ive decided on the je rods and pistons matched set i pay well under a grand NZD do it once do it right, you say billet oil pump? never knew they made them? any ever seen a mazdaspeed oil pump and that was for the smallnose cranks, with some valvetrain work how high can the bp engine rev?
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