Which size ram pipes

[1963'S']

Fitted the Maniflow twin HS2 inlet with refurbed carbs, nice braided fuel hoses, now the pancake air filters seem a bit tame!
Thinking of some ram pipes but not sure what size to go for.
I can get 1.5 inch or 3 inch.
Any advice greatly appreciated.
The engine is 1293, Piper cam,large valve head,Maniflow ex-manifold.

Steve

[Vegard]

Which cam?

[1963'S']

285 I think.
Forgot to say it also has one of Rich's HRG rocker covers which looks fantastic, I think ram pipes will compliment this!
Steve

[foxy52]

Fitted the Maniflow twin HS2 inlet with refurbed carbs, nice braided fuel hoses, now the pancake air filters seem a bit tame!
Thinking of some ram pipes but not sure what size to go for.
I can get 1.5 inch or 3 inch.
Any advice greatly appreciated.
The engine is 1293, Piper cam,large valve head,Maniflow ex-manifold.

Steve

..I have short stubs with H4,s,i think they look better?!..the same set up as the late Steve Smiths beaut of a mk 1 S albeit I have a mk 2 S....Piper cam,Janspeed inlet manifold and a Maniflow 2 system..i would have no idea of the extra BHP benefits for 1.5 over 3 inch ?..if indeed any ....?..foxy52

[Vegard]

Fit bigger carbs for starters.

[1963'S']

The carbs have to stay at the moment but I think I will go for the 1.5 inch ram pipes.
Steve

[carbon]

Steve, running without air filters can wear the bores out in fairly short order if you're planning to use it

[Astro]

for road use I would take K&N filters with stub rampipes inside. This would be the best compromize for power and engine and does look not so bad.

[1963'S']

Thanks Guys
I will post a picture when fitted and you can see what I went for on your advice
Steve