On another note Gav; I WAS going to assemble my new shortie myself, but I've been offered a deal I can't refuse on all machining, clearencing, modification & short block assembly for <$1k

This will save me time & the possibility of me making a dumb mistake.

My bottom end is then apparently good for 450+ hp at the crank......100 hp plus over my target.

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

2.1 - 2.5 fails.... well... in my case anyway haha

I think Rossco hit the nail on the head, I need to work out my power goals and go from there, plus the fact that the 2.5 needs more $$ to get the reliability...

Failure rate, also interested in what are factors are making you lean towards the 2.5.

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I guess it is the street driveability and extra torque, however I am aware that the more you push them the more often they fail...

2.5 can be built tough and be able to rev and make good power as well, can all ways go a 2.35, those extra cubes give the torque to be able to pull us fat sods arounds.....

Gav.

Speak to tony knight.. Guru in my book, let him know ur goals and hell make u a ripper engine..

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I'm a jockey kunts...

there should be very little difference in the "rev-ability" of 2.5 and 2.1 litre bottom ends.

they both have the same stroke(79mm/2.5 crank) and rod ratio (unless you are building something out of the ordinary with custom length rods and pistons with altered pin height to suit).

cam and turbo selection would cause a greater variance on "rev-ability" than the bore size difference.

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Can i ask what happened to the current engine? Why not just keep it going untill it dies? Strap a bigger turbo on and enjoy.

Okay, so what would you go for?

I guess the 2.1 would be a stronger set up.

cheers