Blipping the throttle before turning the engine off
#1
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Jan 2002
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
Blipping the throttle before turning the engine off
Why do people do this, was there a reason on old cars with carburettors. We have been having a discussion at work today as there are some that think there was a reason, so the car started first time, when restarted. Is this right and why was the reason, and then there are the rest of us that think it complete cr@p. Can anyone give some ideas or there thoughts that i can tell them when at work tomorrow.
Thanks very much, i look forward to reading your replys.
Luke
Thanks very much, i look forward to reading your replys.
Luke
#4
Scooby Regular
iTrader: (1)
Join Date: Jun 2003
Location: 'Nuneaton' - Home of The Stealth Scoob
Posts: 1,853
Likes: 0
Received 0 Likes
on
0 Posts
Blipping the throttle before turning the engine off helps nothing at all, infact it can leave un-burnt fuel in the combustion chamber hence the potential for back fire at start-up.
#6
Scooby Regular
Join Date: Jun 2004
Location: N Derbyshire
Posts: 109
Likes: 0
Received 0 Likes
on
0 Posts
With todays modern engines with injection and electronic ign. it is very bad practice but (I believe) 40/50 yrs ago it was recommended as it aided re-starting. My Dad did it and he was taught in the 40's. You need to go onto the VSCC site and ask them, or MG car club, or Austin Healey Club.
#7
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Jan 2002
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by medic
With todays modern engines with injection and electronic ign. it is very bad practice but (I believe) 40/50 yrs ago it was recommended as it aided re-starting. My Dad did it and he was taught in the 40's. You need to go onto the VSCC site and ask them, or MG car club, or Austin Healey Club.
Looks like a trip to one of these websites then, the majority of us at work were saying the same that it just washes the bores down with fuel. Not good.
Thanks all
Trending Topics
#8
Also, blipping a turbocharged engine isn't the best of ideas as you're doing a hot shut-down so any oil pressure will drop like a stone as the engine stops but the turbo's still running down from a potentially higher speed than tickover speed - not good for lubrication properties especially if you haven't been off boost / on cool-down before blipping the throttle
#9
Scooby Regular
iTrader: (1)
Join Date: Dec 2001
Location: You only live ONCE But if you do it right >>>>> ONCE is enough
Posts: 7,327
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by medic
With todays modern engines with injection and electronic ign. it is very bad practice but (I believe) 40/50 yrs ago it was recommended as it aided re-starting. My Dad did it and he was taught in the 40's. You need to go onto the VSCC site and ask them, or MG car club, or Austin Healey Club.
Blipping the throttle when switching off supposedly left extra fuel in the combustion chamber so that when next started it would act like an extra "choke" & richen the mixture.Although how much fuel would remain after washing down the oil on the wall of the bores & filtering past the piston rings is anybodies guess.Not to mention losses by evaporation from a hot engine.
Mark
#10
just an interessting point, on our 1913 cadilac with a 6 litre :O 4 cylinder engine you have to put petrol into some little taps, open and then close them above each cyclinder.
and then crank it by hand if the b*tch doesnt want to start
and then crank it by hand if the b*tch doesnt want to start
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM