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

 

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.

 

Heres a pic of the rods and pistons i got

http://file040a.bebo.com/14/large/20...046623911l.jpg

 

Bump..

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

 

bump...

in for banning this queer.

 

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.

 

JE pistons aren't really any more expensive than any other piston.

 

im not worried about the price of JE's can get them very cheap, just wanting some advice

 

ill take the old rods when you are done....

 

Not for sale

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

 

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.

 

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

 

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?