Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Has anyone upgraded there pullies ?

Hmm... guess I won't be putting UDP on the crank. I see what you have said and do not think it is worth it. BTW, your handle is lame and you are a handle!! Changed the sig also. Thanks.

Originally posted by DemonSVT:

---

Instructions from someone SELLING the parts. Not that designed them.

The stock crank damper will not function in the frequency range it is designed for if you change it's positioning and orientation. (I.E. it is WORTHLESS DEAD WEIGHT)
Also the engine would rev slower when you add the weight of the 2 pulley's together. (the SHO pulley plus the stock pulley outweigh the DMD itself by nearly 3lbs) That in itself would negate any HP gained and just leave you with a slower revving engine. Why bother?

---

Demon SVT:

We are the ones that designed the pulleys, not just a reseller. It seems to me you missed the Dynojet chart included on page 3 of the SHO Shop UDP instructions. We design all of our own parts and we test all of our parts on our in-house Dynojet 248C. The Underdrive Pulleys picked up 4hp/4 ft. lbs TQ on our '98 Project SVT, and have seen as much as 6-7 hp on other Contours. We are not afraid to post if a part only makes 1 hp or even loses horsepower, it will all be proven on the dynojet.

We have been designing parts for the SHO for over 8 years now, and have carried over that experience to the Contour SVTs.

Originally posted by SHO Shop:

---

Originally posted by DemonSVT:

---

Instructions from someone SELLING the parts. Not that designed them.

The stock crank damper will not function in the frequency range it is designed for if you change it's positioning and orientation. (I.E. it is WORTHLESS DEAD WEIGHT)

---

Demon SVT:

We are the ones that designed the pulleys, not just a reseller.

---

You designed the stock crank pulley & damper? Exactly!

Also at least half of your "shown" power gain is from underdriving the P/S pump. (ever thought of selling that pulley seperately) Not lightening the crank pulley and removing the harmonic damper and compromising engine reliability and longevity. (Others dyno too)

Your power gains on the dyno are without a piggybacked stock damper too. Dyno piggy backed and see what the change is. Dyno without the P/S pulley and see... Exactly...

Originally posted by DemonSVT:

---

You designed the stock crank pulley & damper? Exactly!

Also at least half of your "shown" power gain is from underdriving the P/S pump. (ever thought of selling that pulley seperately) Not lightening the crank pulley and removing the harmonic damper and compromising engine reliability and longevity. (Others dyno too)

Your power gains on the dyno are without a piggybacked stock damper too. Dyno piggy backed and see what the change is. Dyno without the P/S pulley and see... Exactly...

---

Where exactly are you getting these assumptions from? Were you standing next to me when our Contour was on the dyno? No. The pulleys were tested exactly as they are sold (both pulleys), no "games" or "tricks" are being played on the dyno. If you feel that uncomfortable with our product, I advise you do not purchase it. Do not make false statements without dyno data to back it up.

The harmonic dampener is not removed at all, it is still fully fuctional. "engine reliability and longetivity" is not compromised in any way. To this day, there have been no reports of crank damage as a result of our pulleys.

keep it coming guys, i love a good debate. and I dont' have to ask questions to get information :-)

Originally posted by SHO Shop:

---

1. The harmonic dampener is not removed at all, it is still fully fuctional. "engine reliability and longetivity" is not compromised in any way.
2. To this day, there have been no reports of crank damage as a result of our pulleys.

---

1 a. So you are saying you made those claimed gains with the stock damper piggy backed on your undampened UDP???

1 b. No it is not fully functional. When you change the orientation and positioning of the damper it alters the frequency range in which it operates (Where's Judge when you need him)

1 c. Again, have you ever thought about selling the P/S pulley seperately? It would likely be a big seller being as most folks don't want to compromise reliability by running an undampered crank pulley.

2. We have pictures and posts online to prove otherwise (Where's Terry when you need him) Let me try and hunt them down for you! Main bearing failure is not pretty!

addendum - I still say at least half your claimed gain is from the P/S pulley alone. I noticed no difference between the switch from your UD crank pulley to stock while keeping both the P/S pulley and an Alt UDP on the vehicle.

Then when I switched to the DMD I noticed an actual improvement in acceleration even with it weighing 1lb more than stock. The reduced crank whip and vibrations have less parasitic loss and on top of that add to engine longevity and reliability.

Originally posted by DemonSVT:

---

1 c. Again, have you ever thought about selling the P/S pulley seperately? It would likely be a big seller being as most folks don't want to compromise reliability by running an undampered crank pulley.

---

W3RD! I'd take one if you sell just P/S pulley.

Originally posted by DemonSVT:

---

1 a. So you are saying you made those claimed gains with the stock damper piggy backed on your undampened UDP???

---

Yes, those are actual gains.

Originally posted by DemonSVT:

---

1 b. No it is not fully functional. When you change the orientation and positioning of the damper it alters the frequency range in which it operates (Where's Judge when you need him)

---

Since the stock Harmonic balancer is retained, it would still retain the dampening characteristics (Unlike some other pulleys which replace the stock balancer with a solid pulley).

Originally posted by DemonSVT:

---

1 c. Again, have you ever thought about selling the P/S pulley seperately? It would likely be a big seller being as most folks don't want to compromise reliability by running an undampered crank pulley.

---

Our pulleys only came as a set. In order to reach optimum gains in HP, both pulleys must be used.

Originally posted by DemonSVT:

---

2. We have pictures and posts online to prove otherwise (Where's Terry when you need him) Let me try and hunt them down for you! Main bearing failure is not pretty!

---

I am very eager to see these photos. Email them to me @ tomg@shoshop.com.

Originally posted by DemonSVT:

---

addendum - I still say at least half your claimed gain is from the P/S pulley alone. I noticed no difference between the switch from your UD crank pulley to stock while keeping both the P/S pulley and an Alt UDP on the vehicle.

---

Again, this is your theory. Produce a dyno sheet to back up your claims. Butt Dynos are not considered proof. Show me some actual dyno data to back up your claims.

I just installed the DMD and I notice a huge improvement. i wouldn't mak a HP claim, but it feels much smoother. Either way, I would probably buy the single pulley, if available.

Originally posted by AirKnight:

---

W3RD! I'd take one if you sell just P/S pulley.

---

I just got the approval. We are now offering the P/S pulley seperately for those who want to run the DMD itself.

Underdrive Power Steering Pulley - $89 (belt not included)

As soon as I have another Contour SVT to work on, what I will do is dyno before/after with just a SHO Shop P/S pulley installed and we can compare dyno charts. If there are any other issues needed bringing up, please email me privately. I tend to anwser questions more quickly that way.

Your stock belt should be able to fit without replacing. I am generally very easy to work with and do listen when particular issues are brought up.