Single or Twin Spark?

JoeC · Post by **JoeC** » Wed Jul 04, 2007 2:51 pm

Putting aside how the engine has been run in and cared for, which is the better engine - single or twin spark?

madman · Post by **madman** » Wed Jul 04, 2007 7:17 pm

Wife has single and I have twin. Very little difference apart from mine being a little bit more economical.

r550s · Post by **r550s** » Thu Jul 05, 2007 6:58 am

for the environment - twin
for cost of replacing plugs - single
for power - neither
for mileage - none (convert it to diesel)

JoeC · Post by **JoeC** » Thu Jul 05, 2007 2:56 pm

I thought it was already diesel by the way it vibrates!

BMW-Fahrer · Post by **BMW-Fahrer** » Sat Jul 07, 2007 4:41 pm

The old 2 valve boxers surely benefitted from the twin spark conversion (more power,smoother run,more power) with the 4 valve boers I'm not so sure...
My 04 runs a little smoother and maybe gets 10% better mileage but I think my 99 had a little more power on top...
That and the fact that you have to buy only half as many plugs come replacement time maybe the single spark was the better one?Of course a little smoother running and better mileage is not too bad either.Which one is better?Flip the coin...