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iron barrel
Posted: Fri Jan 16, 2009 9:46 am
by red ghost
What's the safest size an iron 125 barrel will go?
Re: iron barrel
Posted: Fri Jan 16, 2009 9:52 pm
by bristolmod
I recon 150 with no problems.
175 is pushing it but may be OK
Chris
Re: iron barrel
Posted: Sat Jan 17, 2009 12:29 am
by J1MS
red ghost wrote:What's the safest size an iron 125 barrel will go?
between the fins the 125's diameter is about 5mm thinner than a 150's and when a 125s bored out to a 175 they have been known to fold like a squeeze box when tightened up onto there studs! Its like a sort of crumple zone after being bored
Re: iron barrel
Posted: Sat Jan 17, 2009 1:21 am
by corrado
You'll get overheating problems going to 175 and the seizures that go with it. You'll pick up a 150 cheaper than the cost of boring the 125 to 150 anyway. I'm sure there'll be plenty of freebies knocking about for P&P money.
Re: iron barrel
Posted: Sat Jan 17, 2009 3:49 pm
by shocky
i was told years ago that 60mm was the biggest to go to so about 165cc mahle used to do a nice piston for these i have one somewere it has dykes rings and is very light
Re: iron barrel
Posted: Tue Jan 20, 2009 7:51 am
by adriang
I certainly wouldn't be doing that here in QLD Frank. We were discussing if we'd ever run an iron barrel with the alloy options out there now.
If you fancied boring out a 150 barrel, both Cainy and I have a couple kicking around.
Re: iron barrel
Posted: Tue Jan 20, 2009 9:18 am
by red ghost
Yeah, I was just curious as Paul had one on ebay
Re: iron barrel
Posted: Tue Jan 20, 2009 5:27 pm
by jonny snatchsniffer
ive done a 125 barrel out to 62mm it was a s3 1962 model, i first ported the 125 as it was then got it bored out to 62mm using a thin ringed asso piston and ported it some more i think it was about 155/160 inlet and around 170 exhaust the obligitory 30mm and a pm pipe, ran very well, i never had any problems with it at all but maybe i was lucky.