Bored out cyclinder head

[jayod12b]

Had to bore out a cyclinder head during the week!

Didnt geta chance to chat to the mechanic who left it in.

But one of the lads did and he was told that he was gettin a massive
increase in hp bye what i was doing..

Never heard of this been done before

Can anyone shine some light on this matter.

Dont even know what the engine is sorry lads

Gota few pictures thou








Bored each one out 1mm.

[Myfeckin FTO]

Had to bore out a cyclinder head during the week!

Didnt geta chance to chat to the mechanic who left it in.

But one of the lads did and he was told that he was gettin a massive
increase in hp bye what i was doing..

Never heard of this been done before

Can anyone shine some light on this matter.

Dont even know what the engine is sorry lads............

...............................Bored each one out 1mm.

Its a good mod if done properly and within correct tolerances. It basically increases the CC of the engine. That particular block is a 4 cylinder - 16 valve unit - IMO somewhere between 1600-2000cc - a 1mm extra bore would add maybe 10bhp extra(def no more than 15bhp dependant on engine) - not exactly a massive increase but as part of a package of mods it all adds up.

[Muad_dib77]

Used to be a popular mod on mopeds back in denmark..

Sometime you'd just fit a larger cylinder,piston and top on there instead though..much less work.. Mine was able to do 85-90kmph...wroum! or rather "Peeeeeiiit PEeeeeeit Putputpuut splutter"

I agree with myfecking though - it's A LOT of work - something I'd only consider if I had a spare motor sitting about - or say I was upgrading to forged pistons and the price difference was ok.. of course you'd only really be doing that if you're adding a turbo or something similar - and that'll then give you the main increase in power.

There are lots of other mods I'd do before "boring" - but yes - it does give gains if it's done right.. If it's not done right it can cause some very expensive problems..