8.8:1 = early proteges (through 93)
9.0:1 = 94 Proteges
9.5:1 = 94-97 Miatas
10.0:1 = 99-up Miatas

I know you can use all these pistons in the BP block, but are the rods the same length, or do they need to be used with specific ones (ie. GTX pistons must use GTX rods?)

Does anyone know what compression a '95 Escort GT BP would have?

 

is there any place that can help me out with understanding these damn compression numbers?

 

Why not? By the time I get all my parts together, I'll probably have ~175K on the clock !

 

VICS = mistake IMHO. you can easily gain 5 hp by removing it.

 

I'll probably do it this winter, timing belt/water pump change is coming up at 240K.

 

I agree with Jesse..... I dont think mazda made it that way for the sake of loosing hp.

 

And if I have it right I think it'll help your gas mileage a little bit too

 

Why buy a GTX motor when u can get a Bp with 40k for 350 bucks?. The Bp is my choice. Jon

 

Did I read somewhere around here that it might be a good idea to remove the VICS manifold and replace it with the GTX manifold when going turbo?

 

Okay, this same question has been going over my mind a lot too.. either take a BP engine and build it up, or get a GT-X engine and put in my '90 4WD Pro, 5spd... It seems that going the way of the BP would be quite a bit cheaper, possibly, especially when I'm not looking to race my car but just be able to get off the line a lot quicker than the stock 103hp engine has. Would you all agree then? And in that case, all I need to do the swap is the BP engine, ECU, and trans?

 

Well how much power do u want?. The bp motor does not come with a turbo or manifold but does have a better flowing head. It is plenty strong enough to handle 200 plus whp. But the GTX comes with the turbo and manifold but has a restrictive head. I say if u can get a Bp with 40k buy that and a vj-20 turbo and manifold ..

 

I want decent power, not really for drag racing or anything.

I am just tired of the 1.6 SOHC puttering around town. I want something that can at least stomp Civic LX/DX/EX/HX's. I see people rice those out and I can only hold with them. That annoys me.

In the future I plan to go with a moddest turbo system, nothing really all that huge.

 

One of the members here recently did a BP swap into his 323, and he's been having great luck beating civics.

If you're not looking for massive power, there is no reason to bother with the GTR BPT engine. ****, for half the price you should be able to have a real quick NA BP turbo buildup.

 

hahahaha, get a gtx engine with ecu for $850 at www.blacktrax.net. cheap ****, thats what i did.

 

Dont you need to get a wiring harness extension since the wires come through on the other side on the GTX/R? Or is that only on the J-spec engines?

How hard was the gtx swap? For 850, thats about what I would spend fixing up the BP.

I know the NA head is less restrictive though, so it might be better to start with a NA and build it up, especially since I am in Texas, and the GTX is in california, or even further from other places.