Underdrive pulleys

[THE H.P FREAK]

Under the limited usage of the drag strip you'll see a small difference like you obviously did.

But on a street driven truck?

I call Bullshit.

AD

HI!... I drive it everyday. It's my daily driver + work truck. sooooooooo. ya....

 

[THE H.P FREAK]

He gets OVER 28mpg with them modifications! In a Ranger with a 4:11 in it..
Big Jim

HI!... Actually it's 4.10 gears...... And yes it gets 28MPH on the highway. Never documented what it would get in the city. Don't care much what it gets in town. When I drove the the dragstrip last week, it's a 220KM trip. Fully loaded with gear and a headwind most of the way up I used a 1/8 of a tank.

My F-150 would make the same trip only using about a 1/4 tank of gas and that's also with 4.10 gears and 28" tall tires. Not to mention almost 450H.P.

 

[THE H.P FREAK]

People still don't believe that I could get a repeatable 25mpg with a 2.9 in
a truck with 4.10's and 235's

I now have the same truck with the same tires and a 4.10 and an
absolute best of 22mpg

But the one that really sets me off is the people talking about the "Cold air intakes"
when every ranger made altready had one that they needed to remove to put their aftermarket "stuff" in it's place.

They'll point to the heat riser and say that heats the intake...
really tweeks me because that thing is closed off most of the time...

AD

HI!... Well my so called factory CAI was breathing through a tiny restrictive little snorkle tucked up behind the headlight. My set-up has a custom aluminum airbox enclosed behind the headlight. I have massively opened up the area behind the headlight to allow more incoming air flow. My conical filter has twice the surface area than the stock air filter does, + it's cleanable and re-usable. I will continue to use it. I've built plenty of custom CAI's over the years for different people's vehicles. Never had a problem or complaint, but lot's of compliments.

 

[THE H.P FREAK]

My goal was better mpg and I got it. I now average 18.4 overall with maybe 60% city. Best on a trip was 22.0. These figures are based on a long term tracking of my mileage, not a tank or two.

So when gas gets back to $4 or more and it will, there is some savings. How long will it take to pay for the pulley? Don't care. Just trying to lower my carbon footprint.

HI!... Exactly! You can get performance increases and better MPG at the same time. Been doing it for years.

 

[Bob Ayers]

HI!... Well my so called factory CAI was breathing through a tiny restrictive little snorkle tucked up behind the headlight. .

Do you think the snorkle is limiting the amount of airflow into the engine?????

 

[BlackBII]

Do you think the snorkle is limiting the amount of airflow into the engine?????

I think it's obvious that he thinks it does...

 

[iceracer60]

idk... obviously he is smarter than the people designing the intakes at ford

 

[BlackBII]

Now, just to clarify, I'm not trying to be rude/flame/or make fun, but do you really think Ford would use restrictive intake plumbing??

 

[Bob Ayers]

Now, just to clarify, I'm not trying to be rude/flame/or make fun, but do you really think Ford would use restrictive intake plumbing??

People say and/or write things without thinking, so I was asking the question to give him the benefit of the doubt.


With CAFE standards, ALL auto manufacturers design/build their vehicles to be as efficient as possible, so, they DO NOT design/build restrictive intake systems!

Larger diameter intakes, etc. will not give you any more airflow, all it does is decrease the airflow velocity, which screws up the accuracy of the MAF sensor, and throttle response.

 

[AllanD]

that "tiny snorkel tucked up behind the headlight" still has more flow area than the throttle body the same air must eventually pass through.

And making the air flow "better" might make a miniscule difference at WOT,
but it's not going to make a damned bit of difference cruising down the
interstate at 2300rpm and 40% throttle

The theoretical gain of underdrive pullies will generall be seen at the engine's
horsepower peak, at lower rpm the advantage is a "Square root/half" function
So if for example you actually could document a 25hp advantage from some
add on at 5000rpm at 2500rpm the "advantage" would be 5hp

BTW, mentioning aftermarket CAI-systems or underdrive pullies is as usual
effective in making Bob post

Repeating advertising hype is not the best way to make an
impression here... presuming you wanted to make a good impression
If you want to make a bad one you are right on target.

The main difference with us older guys is that through years of tuning
and practice our bullshit detectors are some of the most finely tuned
instruments on the planet.

But in this case even that doesn't matter, there's nothing new here
that we haven't thoroughly debunked (repeatedly) in the past except
some bright faced newcommer repeating the same things that to us
were "old hat" TWENTY years ago.


have this tattooed on your arm where you can read it every day:
T.A.N.S.T.A.A.F.L.

It's an acronym, it means "There Ain't No Such Thing As A Free Lunch"

Basically we thing you are telling us you found this great new drug,
it's called "placebo"... Dude, we've heard this all before.... many times.

AD

 

[dangerranger83]

All I can say is put what you want on your vehicle. If you want to run something go for it. If it help or not IDC.

 

[AllanD]

What the Oldtimers here are wound up about (myself included) is someone making dubious unsupportable claims and possibly convincing others that they "need" "It"
(like the ebay advert) whatever "it" happens to be...

That is how aftermarket scam artists convince people that they need this
new "super ignition coil", or some fancy gizmo spark plugs....

Or a plastic cold air intake.

The only way to prove a modification actually created an improvement
is to do the mods on a truck thwt the modifier doesn't drive.

You have someone else who is unaware of the specific mods
or the goal the modifier intended to drive it.

It's like testing a new medicine with a "double blind" study
even the doctors don't know who's getitng th actual drug
and who's getting the placebo.

Not to mention there's a second group of healthy people who aren't sick
oif which HALF are given the actual drug and half are given placebo
to determine what the side effects are..

IF you know you are modifying it for performance or mileage
and are conciously trying to drive it for mileage that can affect the results.

Because it ignores the adaptive learning curve of the driver.

when I first get a vehicle with an unfamiliar power plant it takes me some time
to figuire out how to "rub and tickle" it correctly to get the desired result.

It's like sex with a new girlfriend, it may be the same but yet everything is
different... and you get better with time and practice

AD

 

[THE H.P FREAK]

Do you think the snorkel is limiting the amount of airflow into the engine?????

HI!... On a bone stock engine. YES. Seen it many times on the dyno. Especially on diesel trucks. Mine ain't stock.

 

[THE H.P FREAK]

idk... obviously he is smarter than the people designing the intakes at ford

HI!... Actually most intake systems on everyday non performance vehicles are restrictive. This is a very well know fact. I'm surprised you didn't know that.

 

[THE H.P FREAK]

Now, just to clarify, I'm not trying to be rude/flame/or make fun, but do you really think Ford would use restrictive intake plumbing??

HI!... Yes. I have engineering friends that work in the FORD dyno room here in Windsor. There is deliberate restrictions put in vehicles to tone down the H.P/TQ to get the desired MPG rating and H.P/TQ #'s desired. Why do you think you get H.P/TQ increases when doing exhaust, CAI's tunes. If they did this from the factory, H.P/TQ #'s would go up but the MPG rating for a fleet of vehicles would go down.