edyvw
$50 site donor 2025
This is Italian tune up:
High RPM to Remove Carbon
- Thread starter buster
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How long do you keep it at 4k rpms?
My stepfather had a mid 1990's 500SL which ran awful because of the constant low speed driving. I was afraid to do a hard run on the car because it was 20 yrs old at the time and I didn't want to get blamed for breaking something. Mom sold it and a year or so later the buyer stopped by my mother's house and said that the car ran great after taking it on to the highway for a good long run. Apparently he's now winning concurs events with it. I wish I could've bought it.
edyvw
$50 site donor 2025
Not sure what is time that engine spends at 4k on its way to 7k rpm
But when I ski, which is one or twice a week, I generally have no problems pushing oil temperature to 240-250f even though I have radiator oil cooler.
Two other benefits:
1. Get the intake valves nice and hot which helps break up that carbon.
2. Maximum airflow blowing through the intake. My basic calculations suggest that every 100 HP of output flows roughly 140 CF of air per minute. That's about twice what a powerful vacuum cleaner delivers.
In detail, assume 14.7 air-fuel ratio (by mass) and BSFC of 14 HP per gph.
At 100 HP:
1. Get the intake valves nice and hot which helps break up that carbon.
2. Maximum airflow blowing through the intake. My basic calculations suggest that every 100 HP of output flows roughly 140 CF of air per minute. That's about twice what a powerful vacuum cleaner delivers.
In detail, assume 14.7 air-fuel ratio (by mass) and BSFC of 14 HP per gph.
At 100 HP:
- 100 / 14 = 7.14 gph of fuel
- 7.14 gph * 6 = 42.86 lbs. per hour of fuel
- 42.86 * 14.7 = 630 lbs. per hour of air (air weighs 0.075 lbs. / cubic foot)
- 630 / 0.075 = 8,400 CF of air per hour
- That is per minute:
- 0.714 lbs. of fuel
- 140 CF of air
20 mph over eh? lol
edyvw
$50 site donor 2025
Nah, I was still accelerating up the Eisenhower tunnel on I70.
Not sure why anyone would think this worrisome or wonder about oil temps? Any modern engine should sustain 4k indefinitely.
I regularly flog my '11 6.2 harder than that for longer than that. Towing in Colorado, you have to.
If this is to be believed, any modern gasser that tows is clean as a whistle
I regularly flog my '11 6.2 harder than that for longer than that. Towing in Colorado, you have to.
If this is to be believed, any modern gasser that tows is clean as a whistle
Why don't you consider a high dose of PEA into the fuel tank prior to running the tune-up? Just curious.
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This makes sense.
On my DI, non-turbo Honda, I've been babying it with 6 month OCI's (which usually equates to roughly 1k miles).
The oil is always clear with no fuel in the oil -using the scientific "sniffer" test. This engine is notorious for fuel dilution, so frequent changes are imperative to longevity.
Recently I took it up a local mountain road which has extended, straight 8% inclines, with a few long, sweeping switchbacks. Not only did I keep the RPM's up (only about 3500-4k), but kept the pedal pinned to the floor.
After only about 600 miles on this change, the oil color is substantially darker than it's ever been in my 4 years of ownership.
Moving forward, I'm going to follow this procedure before each oil change.
On my DI, non-turbo Honda, I've been babying it with 6 month OCI's (which usually equates to roughly 1k miles).
The oil is always clear with no fuel in the oil -using the scientific "sniffer" test. This engine is notorious for fuel dilution, so frequent changes are imperative to longevity.
Recently I took it up a local mountain road which has extended, straight 8% inclines, with a few long, sweeping switchbacks. Not only did I keep the RPM's up (only about 3500-4k), but kept the pedal pinned to the floor.
After only about 600 miles on this change, the oil color is substantially darker than it's ever been in my 4 years of ownership.
Moving forward, I'm going to follow this procedure before each oil change.
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I agree. They can easily handle sustained 4k rpms. More wear on a cold start. The only thing sustained 4k rpms will do is heat the oil up more which will speed up the oxidation rate.Not sure why anyone would think this worrisome or wonder about oil temps? Any modern engine should sustain 4k indefinitely.
I regularly flog my '11 6.2 harder than that for longer than that. Towing in Colorado, you have to.
If this is to be believed, any modern gasser that tows is clean as a whistle
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Don’t cause any avalanches cruising at 7000 RPMNot sure what is time that engine spends at 4k on its way to 7k rpm
But when I ski, which is one or twice a week, I generally have no problems pushing oil temperature to 240-250f even though I have radiator oil cooler.
edyvw
$50 site donor 2025
I don’t cruiseDon’t cause any avalanches cruising at 7000 RPM
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And people probably think that noise is coming from the airportI don’t cruise
Patman
Staff member
I can’t imagine driving my Corvette for that long at 4000rpm but maybe I will try doing a 30 minute run with the rpm at 3000 and see what kind of oil temperatures I see. I like the idea of possibly removing any IVD that might have formed in the last 106,700 km.
I would probably have to hold it in 5th gear at 70 mph in order to get the rpm at 3000, because 70mph in 8th gear is around 1300-1400 rpm.
I would probably have to hold it in 5th gear at 70 mph in order to get the rpm at 3000, because 70mph in 8th gear is around 1300-1400 rpm.
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So just keep "breaking in" the engine every week without breaking the engine. Got it.
I believe in many of the name brand gasoline that premium has more detergents than regular gas.
Use Techron and forget the Italian tuneup.
Nick1994
$100 site donor 2024
Glad to hear my Genesis’ engine is already spotless
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