2.5 crank into V7 207 block

[Dre]

I have a new V7 207 short block.Can I use a 2.5 crank and the 207 pistons with shorter rods?After driving a 2.1 Legacy this is possibly what would work for me as I want to keep my Legacy Vf45 turbo and tmic.

[Dairusire]

Short and tall, is yes you can do that. 

[Dre]

19 minutes ago, Dairusire said:

Short and tall, is yes you can do that. 

Any downside compared to the conventional way of doing this.Where can I find the shorter rods.

[A_J_T]

I briefly looked at doing this recently. Longer rods reduce piston side loading, and piston weight. I think generally speaking keeping the longer rod and getting some pistons made to suit is the advised route. 

[Dre]

If I have to replace the pistons,there’s probably no point in breaking a fresh 207 short block.Brought this a few years ago to replace a dodgy rebuild in my BH which my son now drives.Piston slap and oil leaks doesn’t seem to p#ss him off.

[Andy_Mac]

What’s the end goal again? Seems like a waste of time with a turbo as small as a 45 since it spools up like crazy anyway. The lower comp of the 207 and the extra timing it will allow should leave you more than happy enough to not bother stroking it. 

[Dre]

The end goal is to leave my mint Bl Legacy jdm and not butcher it.I have a gc8 non turbo 1.8 auto in the driveway waiting patiently for that treatment.