Underdrive pulleys

[THE H.P FREAK]

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.

HI!... That's funny. right there. WRONG...... Only when people don't know what their doing. It's called data logging and re-tuning for the mods............

 

[iceracer60]

yes but also when they design these system at the factory, they design them to be the most efficient when the motor is stock, not arguing that doin exhaust and tuning will add power, but they are designed to be efficient. and when the engine is effecient it is running in its designed peak range

 

[iceracer60]

Especially on diesel trucks

agreed that pushing more air into a diesel makes more power, but thats a diesel and were talking gassers. thats like comparing apples to oranges

 

[THE H.P FREAK]

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

HI!... Well I'm not some young kid either. I've probably logged more dyno time in testing and using flow benches than most here. I test everything I build. I've already stated my proof. Just some are so set in their ways of thinking even though they are clearly wrong, that they will never change. Mods were added, 1/4 mile times went down. This was documented and proven. Mods were added MPG was increased , documented and proven on a daily basis. I've been racing snow mobiles, motocross/enduro, dragracing most of my life. Not new to what works and what doesn't. If it doesn't work, I won't run it.


I've had run ins with BOB on here before. I just ignore him.

 

[THE H.P FREAK]

agreed that pushing more air into a diesel makes more power, but thats a diesel and were talking gassers. thats like comparing apples to oranges

HI!... I was proving a point by example. And pushing air into any internal combustion engine will produce more power.......as long as the right amount of fuel is added to support it.

 

[Bob Ayers]

This was documented and proven. Mods were added MPG was increased , documented and proven on a daily basis. .

You have NEVER had any PROOF! Words are cheap!!!!

 

[JMC]

When vehicle manufacturers design engines they have to take into account a lot of things. CAFE ratings are one of them. Build costs and serviceability are others. I am sure that there are other factors too but these are the ones that directly effect this discussion. When Ford tunes the vehicles they have to take into consideration many different driving conditions and come up with a compromise that satisfies all the requirements. When say a pulley designer makes a pulley he only has to consider one thing. Will it fit. Anyone with a speck of intelligence knows that if you can reduce the torque required turn an accessory you will free up some power. The reason ford doesn't use power pulleys is that the alternator will not charge as well when it is turning slower. The water pump may not be as efficient and that could lead to overheating issues.

Page 142 of the Ford Racing catalog ;
SERPENTINE BELT HORSEPOWER PULLEY KITS – MUSTANG 5.0L
Contains steel crankshaft, water pump and alternator pulleys, plus bolts and installation instructions. Reduces accessory drive rpm by: (water pump–14%) and (alternator–22%) …and significantly improves performance! Pulleys are manufactured on state-of-the-art CNC machines and have an awesome blue finish over zinc plating. Pulleys use production serpentine belt.
WARNING: Engine cooling will be reduced

Who owns and endorses Ford Racing? What do they know that you don't?

.

 

[BlackBII]

Who owns and endorses Ford Racing? What do they know that you don't?

Somebody trying to make money, just like every other company.

It would be bad business to not put that in the catalog.

Can the pulleys help make more power by putting less load on the engine from the accessories? Sure, but a 5hp increase when at 40% throttle cruising down the freeway is not going to account for the cost of said pulleys.

Most people never open their throttle fully everywhere they go, so these changes made to improve airflow will not provide enough incentive to purchase them, as the "restrictions" really only come into play when your stomping on the accelerator, and when do you ever do that when trying to save fuel? It's a cost thing.

Sure, the stock intake is designed to account for noise reduction, but that is because the consumers would rather lose the 2.1 horses to have a quieter vehicle at cruising speed.

 

[THE H.P FREAK]

You have NEVER had any PROOF! Words are cheap!!!!

HI!... Bob, Bob, BOB............ Try looking around on this site. I've posted my videos, my 1/4 mile timeslip. my truck at the dragstrip with the timeslips # posted on my windsheild. Members here and on the other RANGER sites were there to physically see the truck in action. So your argument is void..........

JMC who just posted was there and watched the truck go down the track. He was also in the convoy that drove up to the track with me. He saw how much fuel it required for me to get there.

 

[THE H.P FREAK]

Somebody trying to make money, just like every other company.

It would be bad business to not put that in the catalog.

Can the pulleys help make more power by putting less load on the engine from the accessories? Sure, but a 5hp increase when at 40% throttle cruising down the freeway is not going to account for the cost of said pulleys.

Most people never open their throttle fully everywhere they go, so these changes made to improve airflow will not provide enough incentive to purchase them. It's a cost thing.

Sure, the stock intake is designed to account for noise reduction, but that is because the consumers would rather lose the 2.1 horses to have a quieter vehicle at cruising speed.

HI!... If you think that by installing performance parts are going to make you pay for said parts in a short time period, then you my friend are into the wrong hobby. lol! I couldn't care less iff the part pays for it'self or not. I'm looking at the performance gain of said part. Better MPG is just a side effect..........

 

[BlackBII]

HI!... If you think that by installing performance parts are going to make you pay for said parts in a short time period, then you my friend are into the wrong hobby. lol! I couldn't care less iff the part pays for it'self or not. I'm looking at the performance gain of said part. Better MPG is just a side effect..........

I'm talking in generalities here...most people don't drag their Ford Ranger every weekend while trying to knock off a half second or two. Your obviously the exception.

But if that's the case, I would start by eliminating the fatness of the Ranger first, shed 1500 pounds or so, then start eliminating the accessories and getting some better airflow.(I would start with the heads.)

 

[JMC]

Somebody trying to make money, just like every other company.

It would be bad business to not put that in the catalog.

Can the pulleys help make more power by putting less load on the engine from the accessories? Sure, but a 5hp increase when at 40% throttle cruising down the freeway is not going to account for the cost of said pulleys.

Most people never open their throttle fully everywhere they go, so these changes made to improve airflow will not provide enough incentive to purchase them, as the "restrictions" really only come into play when your stomping on the accelerator, and when do you ever do that when trying to save fuel? It's a cost thing.

Sure, the stock intake is designed to account for noise reduction, but that is because the consumers would rather lose the 2.1 horses to have a quieter vehicle at cruising speed.

That does not address the fact that the gains are there, does it? In your last sentence you elude to the fact that there is a 2.1 HP gain somewhere if noise was not an issue. So now that you admit that there is a gain it is simply a question of how much gain there is. We are finally on the right track. Next....

.

 

[michowski]

Anybody got some butter for my popcorn here. This is a good show

 

[THE H.P FREAK]

I'm talking in generalities here...most people don't drag their Ford Ranger every weekend while trying to knock off a half second or two. Your obviously the exception.

But if that's the case, I would start by eliminating the fatness of the Ranger first, shed 1500 pounds or so, then start eliminating the accessories and getting some better airflow.(I would start with the heads.)

HI!... Just to correct you. I have been to the dragstrip, "ONCE" this year and twice last year with this 2007 RANGER. Why would I want to make it lighter? It's my daily driver/work truck. Obviously what I'm doing is working out VERY well. It's not lightened up, minus removing the tailgate at the track, and it runs good #'s at the track and gets great MPG.

And don't worry another built 4.0L engine is going to be in the works.

BTW : The 3 mods that I mentioned here have been saving me about $10 a week in fuel costs, so $10 x 52 weeks = $520 a year for the last 2 years = $1040. Electric fan was free due to I took it off another one of my drag trucks, custom CAI was built from steel tubing I had in the garage. Cost $5 to paint it. The ASP under driven crank pulley was $350. So actually my mods have paid for themselves twice already...............

 

[fastpakr]

If your claims weren't so patently ridiculous (e.g. 28mpg), you'd probably have more people listening. As it is, you sound more like a TV telemarketer.