The On-Ramp Blast Off

[Merkava_4]

Is it good for your engine to floor it at the freeway on-ramp once in awhile?

Is it supposed to blow out the carbon build up or something to that affect?

I did just that the other day: the little V6 got up to 6000 RPM between 1st and 2nd, and then up to 5000 RPM between 2nd and 3rd. I hit 80 MPH before merging onto the freeway.

 

[XPR]

Blow out that carbon

You need to be able to get up to speed so you can merge into traffic.

 

[INMY01TA]

I do it all the time.

 

[rriddle3]

And that's when you remembered your redline is at 4,500RPM.

 

[flatlandtacoma]

You are supposed to keep it in D1 when you do that. You want to clean EVERYTHING out.

 

[GMBoy]

I consider it a healthy exercise as long as it's not done all the time. Sure is fun, though.

 

[Camu Mahubah]

Use mothballs if you wanna blow out the carbon. I am having dot withdrawal.

 

[JTK]

Quote:

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.. the little V6 got up to 6000 RPM between 1st and 2nd, and then up to 5000 RPM between 2nd and 3rd. I hit 80 MPH before merging onto the freeway.

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I did exactly that about 12yrs ago. Little did I know their was a cop tucked down in the culvert right where the on ramp spilled into the main line.

$100 and a night at traffic school got me out of that one. I just pick better ramps now!

Joel

 

[Drew99GT]

Quote:

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You are supposed to keep it in D1 when you do that. You want to clean EVERYTHING out.

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Yes, each bounce off the rev limiter creates extra force to really clear the chambers out.

 

[oilyriser]

Don't forget the bottle of water and a hose running to the PCV line, in the passeneger seat.

 

[simple_gifts]

Use LC/FP combo and you don't have to blow anything out....

 

[moribundman]

If it's an older granny car that's never seen high RPM red-lining the engine is a good way to break rings. Stretchy rods and ridges in the cylinder walls don't mix well.

 

[JHZR2]

only if the oil is up to temperature (15-20 miles of use first), and youre being careful.

It sucks gas and depending on engine design, may do diddly.

JMH

 

[TallPaul]

Well I wonder why does the oil have to be up to temperature. So long as the coolant is up to temperature the block should be hot enough. The oil being not up to full temp will only make it act like a thicker oil, say 15w40 instead of a 5w20 maybe. Not sure that would really be a problem.

 

[Gary Allan]

Because oil temp in the most reliable indicator for thermal expansion of pistons and whatnot. At least in non-exchanged/oil cooler'd engines. I'd say about 12 miles or 20 minutes ..whichever comes first.

In my BMW you had to do it every time you were in congested traffic of some length. I managed to do it in 2nd gear and keep it around 55mph. No fuel squeezing on that engine (2.0). You could tweak 30 mpg out of it (24-25 all the time otherwise) ..but it ran lousy the next time that you started it.

 

[Auto-Union]

I do it on most on-ramps. At least it safer than driving like a sociopath in traffic and it's not a huge fuel waster if you are just bliping up to crusing speed. Warp 4 is my prefered velocity.

 

[Colt45ws]

I do it all the time and not just on on-ramps...Whoops, sorry, my A/C was on *click* *hissss*...Whoo hoo, now I can do the same thing at 1/2 throttle!!!

 

[Master ACiD]

in the bad old days of big displacment low rpm v8's with 2 bbl carbs, 2 speed trans and a 1200rpm cruise i would say that this behaviour might have some merit.

modern passenger cars get to 3000 or 4000 rpm's on a daily basis just tooling around the city. my honda crv shifts at 2500-3000 rpm's when i take off normally from a stop light. the little 4 banger needs to rev to make torque. on a modern vehicle like this, i doubt that there is any carbon built up to blow out so to speak.
my dodge stratus v6 shifts at about 2200 r's if i take it easy. and about 2600 r's if i take off with enough speed to keep up with traffic.
i doubt any of these vehicles need to be excersized as engine did in the bad old days.