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Discussion Starter #1
Hello everyone,

I wanted to share a quick and easy trick to free up a few extra ponies. I used to have a 5.0L Mustang that I would drag race regularly back in the old days.:) When I would race it, I would put on a shorter serpentine belt which would bypass the power steering pump; it was usually good for about .1 - .2 in the 1/4 mile.

I wondered if I could do the same thing with my Tbird - turns out we can!! After looking at the way the belt was routed and doing some measuring and test-fitting, I came up with a belt that works perfectly. 63.5" (part number from AutoZone is 635K6). I got frustrated trying to post pics of the way to route the belt, but it is pretty self-explanatory. You simply install the shorter belt in the same way as the original one, but instead of going around the power steering pump, route the belt from the alternator directly to the water pump, then down to the crank pulley.

It appears there are no down sides to doing this (all accessories turn the appropriate way, charging and cooling systems function exactly as before). The only suggestion that I have is to only use the shorter belt when at the dragstrip because your power steering obviously will not work - it's difficult (but not impossible) to steer. I drove my car around for a couple hours tonight without any problems.

According to the SOTP dyno, the short belt seems to work pretty well. Our overweight cars need every bit of help they can get. My car is a '97; I don't know if the prior years have the same belt routing setup...

Have fun!

Frank
 

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Where you from in the area? Check out the IL section of the Chapters forum for upcoming events in our area. Also check out Midwestfords.org and I hope to see you around this summer.

-Miller

PS- Didn't mean to hijack your thread just like to welcome new guys from the area and get them out to meet them.
 

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Fry Rice Specialist
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will these acts destroy the power steering pump??
 

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Discussion Starter #4
Thanks for the welcome Miller! I live in Round Lake and will check out the IL section. I hope to meet up with some fellow MN12ers!

After years of using a short belt on my Mustang, I never had any trouble with the pump. I don't see how it would damage it since its actually not getting used at all during these times.

Frank
 

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cooling.
 

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So that is a electric water pump that has a 'dummy' pulley so you keep the same serpentine belt routing?

The site says it frees up 11rwhp. How is that possible? Especially when you have additional load on the alternator. I find it hard to believe that turning the water pump uses over 10 hp.
 

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im in vernon hills ;) !
 

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I would agree on the Tornado, but an electric water pump is an entirely different story all together.

Think of it this way, get in a swimming pool, and keep your arms extended into the water, and spin in circles. You'll feel the resistance immediately. This is what your pulleys have to spin, only worse, you only have 2 arms, the water pump has 10. It's concievable by taking that load off of your crank, you can pick up a good deal of horsepower. A pulley by itself would pose no load, therefore reducing the amount of parasitic drag on the engine. Same principal as underdrive pulleys. I wouldn't put one on a daily driver that sees a lot of miles, especially city driving, but for a track car, every little bit helps, and performance is a sum of parts, not just one magical HP adding mod. 11 HP seems high, but underdrive pulley manufacturers claim 10HP somehow. Companies always seem to overdo it on the HP amounts.

How many drag cars do you see with a Tornado????

How many drag cars do you see with an electric water pump?????
 

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Discussion Starter #14
No pwr steering would be one. This is a heavy car and those of us recovering from a badly broken hand like the idea of pwr steering.
Very true. That is the reason I suggested this to be used primarily at the drag strip where you only have to drive in a straight line (except of course as you drive slowly through the pits). You could certainly run into problems (both figuratively and literally!!) if you had to make an emergency maneuver on the street without power steering. The car is very difficult to steer when the pwr steering pump is disconnected; people with skinny arms need not apply.
:uppoint:

Seriously though, I suggest anyone who tries this to be very cautious and expect the steering to be difficult especially at slow speeds.


The advantage at the track, however, I believe will prove to be worth the effort for those who try it. My indication is the apparent improvement in tirespin during my 1-2 shift with the shorter belt in place.


Have fun, and practice safe drag racing!

Frank
 

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I'm getting rid of my smog pump, a/c and my fan (upgrading to mark viii e-fan) to get rid some of the weight on the water pump pulley, that should be ok for me
 
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