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Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 5:53 pm
by dapper
Are you going to dyno the GP150 when its finished?
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 6:05 pm
by drunkmunkey6969
dapper wrote:Are you going to dyno the GP150 when its finished?
You better believe it dude!
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 6:14 pm
by J1MS
I would like to see what Mick would be capable of with a sleeved cylinder and possibly a bridged exhaust port going out over the main transfers... It could make for a very good day on a Dyno...
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 8:04 pm
by Stokie
Interesting thread this.
I've not seen work like this before on a Lambretta barrel so it begs the question why ?
I realise one probable answer is because it could be just cheaper and easier to buy a larger capacity kit but I've not seen anything like this on a large block either.
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 8:39 pm
by AUSSIE
The new casa lambretta barrel has boost port in the side of the bore but these are fed from below the piston not connected into the transfers, I believe SES do something similar to casa. But what Mick has done so far is fantastic! Biggest problem is going to be finding a bit of the barrel wall for the ring ends to run over
Out of interest does anyone know the width and thickness of a bridge in an exhaust port so it doesnt expand and rub the piston skirt. I know a hole can be made in the piston in line with the bridge to aid lubrication.
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 9:22 pm
by rog60
For the numpties (me) I assume that this is an Italian barrel not the harder Indian ones?
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 9:25 pm
by J1MS
The harder Indian ones are really only a problem when porting in the bore of the transfers otherwise they are pretty much the same to port so long as you have Tungsten cutters and high speed hand pieces 20-30 thousand revs...
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 10:31 pm
by rog60
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 11:02 pm
by drunkmunkey6969
Stokie wrote:I've not seen work like this before on a Lambretta barrel so it begs the question why ?
Which begs the question....why not?
But to be honest....it was just an old junk cylinder he asked to play with, so its no big deal if it works or not...its just one for him to practice on. Its just a toy.
Re: GP150 cylinder - Mick Abbey Tuned - Back to the old school !
Posted: Fri Jul 31, 2009 11:06 pm
by rog60
