B20+b25+b27=?

[level5]

Hello
So I noticed this offer online. Someone is selling an m20b25 engine and throwing in a b27 eta block as well. The B25 has a blown head gasket and from the pictures it seemed like the the valve cover gasket had been tampered with as well.
I would like to know if buying these two engines would be a good idea (considering the blown head gasket etc) and what would be the best combination I could build out of the three (I already own a fully functional b20).

Cheers

[ForcedFirebird]

Best combination (if the 885 head is ok) is to use the 2.7 crank, 2.7 rods and the 2.5 pistons and shave the block down 2mm. This will give you a 2.7 with 9.5:1 compression or so.

If you don't want to break a bottom end and have it machined, then best thing is to just repair and install the 2.5.

[level5]

Thanks for a quick response.
Got some more information about the engines. So the 2.5 block is in a bad shape, sucked something in there and scraped one of the cylinders quite badly. So installing the 2.5 won't be an option.
I've heard a lot of people say that I could get something as good as the 2.5 when I use the 2.7 block and the 2.5 head. Would that be a possible solution? What kind of power would it produce compared to the stock 2.5?

[digger]

You can drop the bits into the eta block it's basically the same block as b25

[ForcedFirebird]

You can drop the bits into the eta block it's basically the same block as b25

We didn't get the b20 here, what is the combustion shape and head casting on them? If they are heart chambers, plop the head on the b27 eta :)

[digger]

B20 is 731 head 80mm bore block.

Head works ok when ported, stock it's not much chop

[ForcedFirebird]

B20 is 731 head 80mm bore block.

Head works ok when ported, stock it's not much chop

It's an upgrade for the 200 head then. I flowed a 731 ans 200...

So OP's best bet with parts on hand is to use the 731 head on the eta block, use the b25 dual valve springs, cam, inlet and electronics. Keep the b20 bottom as a spare (top will bolt on, but have less displacement)...

[digger]

I'd still do the 2.7 decked unless I misinterpreted the question