All,

I recently got hold of a set of 2.5 block halves.

Just checking with the experts here on the pro's and con's of doing a short stroke build.

I believe it becomes a 2.35, and better revving engine than the 2.5.

cheers

__________________
Version 6 Sti
6 Speed, brembos, twin scroll and 2.1 stroker
356hp and 471nm ATW

2.332cc on a standard 99.5mm EJ25X bore.

I think they aren't a bad combination.

If I were to do it I would have 2.0mm longer conrods made, or maybe even longer rods made and use pistons designed a 2.5 stroker.

In order to use the longest conrod possible.

Why would I do this?

Better rod to stroke ratio and less side thrust/bore loading/friction/wear.

The bigger bore has a great effect on how the engine can breath compared to a 2.0 litre bore. The valves are far less shrouded.

Some big cams and valves (plus supporting mods) = 10,000+ rpm ability.

__________________
[SIGPIC][/SIGPIC]

A 2.35 destroke is the build I always wanted to do if the 2.5 ever let go.

I can see this thread could be financially painful.

__________________
[COLOR=Black]Liberty GT Spec B tuned 240 HP & 372 Nm at the hubs.[/COLOR] "Instead of banning high performance cars - ban low performance drivers"

Got you thinking have I

__________________
Version 6 Sti
6 Speed, brembos, twin scroll and 2.1 stroker
356hp and 471nm ATW

I've got a good 207 crank, spec C heads, cossie cams and so on and so on...

come on Gav, you know that you want to build one.

__________________
[SIGPIC][/SIGPIC]

Would you recommend sleeving the block?

__________________
Version 6 Sti
6 Speed, brembos, twin scroll and 2.1 stroker
356hp and 471nm ATW

Close decking yes.

But if the bores are good (round and not barrel shaped), I don't think that you would need to sleave it if you kept the boost below about 2.2 bar.

__________________
[SIGPIC][/SIGPIC]

2.35's are good for high displacement revs, ie big turbo to 10,000rpm sort of build. Rev like a 2L but with the higher capacity

__________________
MY93 Impreza GX 1.8L, 0hp, 0nm

Sounds like a sweet engine.

__________________
Huge range of extinguisher brackets for cars!

http://kap.industries/