alan.gilbert_6384 Posted May 2, 2021 Report Share Posted May 2, 2021 Please could somebody explain the purpose of this plastic plug on the bottom of my SU HS4 carburettor piston? The lip of the plug protrudes very slightly from the bottom of the piston (shown bottom left) and prevents the piston from contacting the carb's bridge when in the fully down position, leaving a minute gap instead of a flush metal-metal connection. Is this intentional? Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 2, 2021 Report Share Posted May 2, 2021 yes it ensures air flow over the jet or it never start until the piston started to rise some are plastic some are part of the piston so it doenst do much for very long but its quite important Pete Link to comment Share on other sites More sharing options...
alan.gilbert_6384 Posted May 2, 2021 Author Report Share Posted May 2, 2021 Aha, Cheers Pete. That was quick 🙂 Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 2, 2021 Report Share Posted May 2, 2021 well there's nowt on TV Ha ! Link to comment Share on other sites More sharing options...
alan.gilbert_6384 Posted May 2, 2021 Author Report Share Posted May 2, 2021 Antiques road show 😉 Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 3, 2021 Report Share Posted May 3, 2021 finding something which is not crime related or depressing is a challenge the repair shop ?? maybe Link to comment Share on other sites More sharing options...
Mathew Posted May 3, 2021 Report Share Posted May 3, 2021 2 hours ago, Pete Lewis said: finding something which is not crime related or depressing is a challenge the repair shop ?? maybe Remember "why don't you" Saturday mornings . Hated it, went outside as soon as it started. Pete you did the exhaust too quickly. You could lend a hand sorting the pumaspits one, need to raise the front about an inch to two! Keeps hitting any bumps! Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 3, 2021 Report Share Posted May 3, 2021 1 minute ago, Mathew said: you did the exhaust too quickly no tried to fit leaving the back unit on but you cant refit the down pipe so 2 more bolts to drop the tailpipe silencer and work front to the back it all went smoothly the double link hanger at the rear suspn Xmember hole is a fiddle and Grandson who assisted doesnt know right from left or forwards rearwards its a foreign mode to his schooling but i didnt bawl him out . it will be a steep learning curve as they have no practical experience ( dont ask single parent and all that goes with it ) its a bit quiet i may remove the falcon tail and use a straight alloy tube time will tell Pete Link to comment Share on other sites More sharing options...
Mathew Posted May 3, 2021 Report Share Posted May 3, 2021 2 minutes ago, Pete Lewis said: its a bit quiet i may remove the falcon tail and use a straight alloy tube time will tell Pete Quiet is good, for a saloon. Loud is ok for short blasting but you soon get bored/tired of it. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 3, 2021 Report Share Posted May 3, 2021 16 minutes ago, Mathew said: Quiet is good, for a saloon. Loud is ok for short blasting but you soon get bored/tired of it. So do the neighbours and everyone else that you drive past on the road... Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 3, 2021 Report Share Posted May 3, 2021 yes dont like barking more into singing the Vit6 had a crisp note to die for Pete Link to comment Share on other sites More sharing options...
PeteH Posted May 4, 2021 Report Share Posted May 4, 2021 Or V8 Burble?. V10`s sound nice too, a sort of 7.4litre rumble. Pete Link to comment Share on other sites More sharing options...
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