LCGB Forums

Hello,

Piston circlip broke and went up the side of the piston

Can this barrel still be salvaged and used and if so what is the best way to do it?








As you can see the only real damage is to the boost port edges, can I just smooth these with a dremmel?

I face a similar quandary if I choose to persevere with a similarly damaged small block Mugello barrel that I bought on a whim.

Initially, I thought of adding some material such as Devcon but there would be no plating on that portion of the bore & it may be a solution, but just too gash for me to rest easy.

My considered opinion is that you can raise the transfer ports (ensuring they are matched) if your port timing will stand it. That is not very likely, though, it may be worth trying in your case.

In my own case, what I was thinking of doing, if anything (!), was to increase the stroke to 60 mm or beyond to bring about an overall better state of tune.

Obviously, that must be done in conjunction with all of the other factors considered such as cylinder head, exhaust port & con-rod, but I’m just expressing an opinion here.

You have an opportunity to capitalise on your misfortune.

Although I have quite a bit of kit for porting, there are now some Chinese made Dental drill kits that are for sale @ about £80. For the cost of a piston, you can buy a variable speed (up to 35 000 rpm) motor control unit with hand-piece & two interchangeable heads. The angled head should enable transfer ports to be reached quite easily.

I hope this response helps.

Stick a new piston up it and thrash the knackers off it.

Re: TS1 salvageable?
Post by bsso78 » Tue Jul 26, 2016 1:17 pm

Stick a new piston up it and thrash the knackers off it.

Ha! Such a refined response Barrie!

With the money saved, he could buy you a couple of new wheelie bin numbers for your race bike front...

I hope you are mending well & Best Regards to your Dad.

I`ve been running one for years that's worse than that - I check it every year and always expect a problem, but it hasn't got any worse and has done more miles since it was damaged than before.

As already said - Quick clean up to make sure no bad edges and a new piston.

If your worried you get a new one and send it to me I`ll make use of it !!

Gaz

it will be fine, no issues. if you don't believe me (and those above) then I will happily take it off your hands for £50!

Just a gentle clean up with some 240 grit wet & dry with your finger will be enough

Re: TS1 salvageable?
Post by coaster » Tue Jul 26, 2016 3:37 pm

Just a gentle clean up with some 240 grit wet & dry with your finger will be enough
Re: TS1 salvageable?
Post by berniek » Tue Jul 26, 2016 2:29 pm

it will be fine, no issues. if you don't believe me (and those above) then I will happily take it off your hands for £50!
Re: TS1 salvageable?
Post by gaz_powell » Tue Jul 26, 2016 1:48 pm

I`ve been running one for years that's worse than that - I check it every year and always expect a problem, but it hasn't got any worse and has done more miles since it was damaged than before.

As already said - Quick clean up to make sure no bad edges and a new piston.

If your worried you get a new one and send it to me I`ll make use of it !!

Gaz

There you go! WTF do I know! I still wouldn't do that long term...

Any takers for a similar, but less, damaged Mugello Ø66 mm small block cylinder? I even have new single ring pistons to suit...

I might be interested in that mugello mark....

I will give it a clean up as suggested just to make sure there are no rough edges.

And then thrash it as advised

bsso78 wrote:Stick a new piston up it and thrash the knackers off it.