bp vs bpt
 

i've seen a lot of discussion between these engines in this forum i just need some clairfication
i see differant compression ratios and they say the bp breaths better and many say get the bp and then get the turbo from the bpt and turbo that.
which one is better suited for the turbo and if i get the bp where can i get just the turbo manifold , turbo and intercooler and all of that to put on the bp.and if i go to the junk yard and get the dohc from an lx model will the turbo mainfold from the bpt fit I want the best over all set up and i know you guys know this stuff better than me. any info to help me out would be great thanx
also if i get a low milage bp from the junk yard what should i get with it to save time and money later like the tranny half shafts ecu ect.

Here's why people say to use the N/A head instead of the BPT head:

http://www.protegeclub.com/forum/sho...threadid=24438

So my recommendation would be to just get the exhaust manifold and turbo, like you said. You can get the exhaust manifold from corksport for $176. Braden (turboge) used to sell that stuff, I don't know that he has any more...I think he's more interested in doing Mazdaspeed Protege tuning now... This isn't the original turbo, it might be one of the ones that bolts up...somebody else will say... but you get the idea... http://cgi.ebay.com/ebaymotors/ws/eB...tem=2418144467

intercooler...hmmm search for whatever :)

thanx chastan anyone else with opinions like to get as much feedback as possible due to wanting a fast pro if you know anyone in the baltimore area that works on these cars who i could take it to that would be great faztcarz has seemed to go out of business or they changed their number i don't know which one i can't find them

One reason you may not want to do a BP build up to a Turbo is if you have an early motor. IIRC 90 and early 91, BP Motors had a crank snout problem. When I had my motor apart I found that the crank had fused.
Other than that, if your motor has high miles and your looking to rebuild it soon I would just look at a BPT.

If you do end up with a BPT, a DOHC head is not that rare if you want the less restrictive head. Though the "restrictions" in the turbo intake are there to aid in low rpm velocity. So you would loose a little at the bottom for more power in the top with the N/A head. Additionally, with the BPT comes with the uprated Fuel injectors, non VICS intake (FWIR VICS in not perticularly good for turbo applications.) Oil return lines. low compression pistons, turbo specific cams and of course the manifold and the Turbo!

Either option will work, it just depends on what you've got and what you want. And Of course you have to have the $$ and patience to get there;)

wessico makes hi comp pistons that up the ratio to a 14:1

They're for the miata, so theoretically they should work.

Let me know if you think they will. I plan to put them in a NA BP block. Its almost like running a turbo without the manifold, or any of the turbo setup.

http://www.importperformanceparts.ne...ons_mazda.html

the only problem is that the 14:1 comp ratio is for the 1.6. Is there any way that they might fit a 1.8 block?

If not then the max they make for the 1.8 is 11:1

Still good, but not as high as I would like.

If they're for the 1.6 they won't fit.

:bt:

crankshaft pulley
 

Thats why the 92-94 DOHC crankshaft pulley was redesigned eliminating that problem. The underdrive pulley of the 90-91 is a one piece while the 92-94 is a two piece design and besides they are not interchangle even if the block is a BP05 for all those years.

The B6 has a 78mm bore to the BPs 83. Your best bet is 11:1 pistons with a 2mm overbore if you're going that route(the last pistons they list). You'd want some big, lumpy cams to take advantage of the 11:1 CR too.

It's funny, those exact pistons cost $561 at Flyin Miata.