45 replies to this topic

[Magic jason]

Was following a rather tasty scimitar the other day that popped non-stop on deceleration!

I personally love the sound of the occasional pop and bang but my mini wont do it! D:
At the moment it hasn't been professionally tuned, just me with a gun, socket and screwdriver :L
I have a rc40 single box system, 1.75. all though its a deep sound i want to get some pops in!
I believe it cant be good for the engine but i love the sound to much to care!
Where can i start? i don't want a serious loss of power but if i have to loose a tad then i'll choose to put up with it or revert it back!
What should i do, whoes done it? etc..
Cheers!

[thebullet]

I want this too, swapping my Double Rc40 for a single maniflow tomorrow.

I have a cooper head and going to fit twin carbs so hopefully I will get some myself

[ryan22_lgm]

mine does it some times 1.75 single box twin dtm. done the mixture and timing myself plugs look ok

[Magic jason]

Stop making me jealous :L
Should mention that its running a standard cam ( whatever that is for a 85 city e) and a hs4 carb i belive (i know how they work yet im confused and cant identify them!) with what ever the needle is in a stage one kit :L im such a help!

[jameswhiles]

Its normally caused by a lean fuel/air mix which isn't too kind on the engine

[Magic jason]

thats what i thought to begin with but i thought also it was a bit more complicated than that, how to hell do i adjust a hs4?

[thebullet]

I am sure I read aswell that is can be caused by both valves still being open togethor, or something similar?

[Mini 360]

Its normally caused by a lean fuel/air mix which isn't too kind on the engine

True and Ive seen others shoot flame due to this.... however........

[Magic jason]

yeah valve lap, not looking to do anything too complex thou :L

[1984mini25]

Just wait until the next time it rains and the electrics get flooded. It won’t just be popping on deceleration, but also on acceleration as well.

[Magic jason]

haha dont get me started with electrics again! pretty much replaced the whole loom and sealed absolutely everything!

[1984mini25]

Plus a mini 1000 misfiring and popping from the pea shooter exhaust is not a good look

[Magic jason]

haha to me its the only look! minis dont look right when there immaculate and powerfull!

[thebullet]

Immaculate and powerfull is the only way to go with a Mini!

[Magic jason]

haha each to there own still this is off topic!