[trendadue]

The more I find out about the CVH engines the more I like them. They seem very sturdy, there's also enough stock out there that they are easy to tune in the after-market or tune by swapping parts with other CVH models.

I also have access to a GT, possibly pretty cheap.

It seems like people prefer to swap the 1.9 CVH for a mazda 1.8, although I don't see much discussion on why.

What's the big deal?

Are the mazda engines significantly lighter?

They have more power stock, but it seems as though a CVH can be tuned to output just as much (or even more) with some head modifications. Also, I would think that the single overhead cams with the two valves per cylinder could allow for higher revs.

What about the transmission that goes with the 1.8? Is the Mazda tranny better, lighter, stronger?

What do you all think???

 

[cklaubur]

I think a lot of people go with the 1.8 BP because it's a bit easier to come up with parts to turbocharge it (the JDM GTX and GTR engines? The base engine, without the turbo, is the 1.8 BP).

There's also a bit better aftermarket for the BP than the CVH.

As for the transmission, I think the transmission that comes with the BP is a bit stronger, but it doesn't bolt to the CVH. The transmission from a 3rd gen SPI engine is pretty close to the BP's transmission, however, and bolts to the CVH.

Casey

 

[trendadue]

Thanks ...

Thanks ... that pretty much explains it.

Welp. I think I'll keep the CVH for now and seriously consider a GT swap - either just the engine/tranny or whole car .

For now I'll work some tweaks (new higher compression CVH head) and suspension/weight.

 

[agrowagon]

believe me once you swap it out you won't regret it!
you won't believe how much faster it will be.

 

[Jeffescortlx]

If you want a easy swap, dont forget about the 2.0 SPI swap.

N/A vs N/A the BP will out perform the CVH no question about it.

Turbo vs Turbo the BP will also out perform the CVH, but not by a lot.

Now if you have to choose between turboing your exsisting motor or swapping to a stock N/A 1.8 BP, a turbo 1.9 will make about double the wheel tourq.

 

[agrowagon]

I agree jeff. I was going to do the 2.0 swap but the BP came my way.
I guess it depends on how much work are you willing to do to it. hell turbo it, bore it, swap it. Whatever makes you happy. but beware BP parts are expensive. but then again when it's custom it's going to be expensive.LOL!!