View Poll Results: What material would you prefer to have?
316 Stainess
17
80.95%
Aluminum
4
19.05%
Voters: 21. You may not vote on this poll
Vote on VelocityAP Crank Pulley Material
#1
Vote on VelocityAP Crank Pulley Material
Hi Everyone,
Our Crank Pulley design is finished, installed and signed off. We're going into production - will announce the usual launch special shortly.
Before we do, we are considering materials. The prototype was make from 316 Stainless, adds some weight, but stronger from a fatigue and belt slippage point of view. It is also more expensive.
Making the pulleys in aluminum would drop the cost approximately $90.
So... market research time. What do you guys want? I'm sure it is possible to do both, would prefer just to stock one part.
Our Crank Pulley design is finished, installed and signed off. We're going into production - will announce the usual launch special shortly.
Before we do, we are considering materials. The prototype was make from 316 Stainless, adds some weight, but stronger from a fatigue and belt slippage point of view. It is also more expensive.
Making the pulleys in aluminum would drop the cost approximately $90.
So... market research time. What do you guys want? I'm sure it is possible to do both, would prefer just to stock one part.
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
#2
#4
Hi Everyone,
Our Crank Pulley design is finished, installed and signed off. We're going into production - will announce the usual launch special shortly.
Before we do, we are considering materials. The prototype was make from 316 Stainless, adds some weight, but stronger from a fatigue and belt slippage point of view. It is also more expensive.
Making the pulleys in aluminum would drop the cost approximately $90.
So... market research time. What do you guys want? I'm sure it is possible to do both, would prefer just to stock one part.
Our Crank Pulley design is finished, installed and signed off. We're going into production - will announce the usual launch special shortly.
Before we do, we are considering materials. The prototype was make from 316 Stainless, adds some weight, but stronger from a fatigue and belt slippage point of view. It is also more expensive.
Making the pulleys in aluminum would drop the cost approximately $90.
So... market research time. What do you guys want? I'm sure it is possible to do both, would prefer just to stock one part.
Last edited by RGPV6S; 02-06-2017 at 12:35 PM.
#5
My opinion as a business owner to another is to not compromise on the quality of the item just to lower the price. $90 material cost isn't insignificant but it's more important to uphold the reputation as the premiere aftermarket performance supplier. That means using the best materials. Let some other company offer the cheap crap to the penny wise/pound foolish.
In the end, we all value reliability and durability over a couple hundred bucks. NO sane person would disagree with that.
In the end, we all value reliability and durability over a couple hundred bucks. NO sane person would disagree with that.
The following 4 users liked this post by hoonery:
#7
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#8
#9
#11
A couple of points based on my observation of a similar pulley from another source:
1. The original is indeed aluminum, but is a solid hunk of aluminum (with a rubber dampening donut) and is a solid hunk of metal (1" wide x 6.5" dia.) and weighs a few pounds.
2. A properly designed replacement will have a recessed cantilever design and weigh less than 8 ounces in aluminum, and something more if stainless.
3. Especially for the MT, you want the least possible spinning weight on the crankshaft to allow fast spin-up and spin-down of the engine during shifts. The increased weight of a stainless pulley designed to minimize weight might not add a lot of mass, but it could make a difference. (When I need my first post-warranty clutch, I will be installing a lightened flywheel.)
4. Since I am no longer in the market for a new crank pulley, my vote doesn't count.
1. The original is indeed aluminum, but is a solid hunk of aluminum (with a rubber dampening donut) and is a solid hunk of metal (1" wide x 6.5" dia.) and weighs a few pounds.
2. A properly designed replacement will have a recessed cantilever design and weigh less than 8 ounces in aluminum, and something more if stainless.
3. Especially for the MT, you want the least possible spinning weight on the crankshaft to allow fast spin-up and spin-down of the engine during shifts. The increased weight of a stainless pulley designed to minimize weight might not add a lot of mass, but it could make a difference. (When I need my first post-warranty clutch, I will be installing a lightened flywheel.)
4. Since I am no longer in the market for a new crank pulley, my vote doesn't count.
#12
Join Date: Feb 2014
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#13
A couple of points based on my observation of a similar pulley from another source:
1. The original is indeed aluminum, but is a solid hunk of aluminum (with a rubber dampening donut) and is a solid hunk of metal (1" wide x 6.5" dia.) and weighs a few pounds.
2. A properly designed replacement will have a recessed cantilever design and weigh less than 8 ounces in aluminum, and something more if stainless.
3. Especially for the MT, you want the least possible spinning weight on the crankshaft to allow fast spin-up and spin-down of the engine during shifts. The increased weight of a stainless pulley designed to minimize weight might not add a lot of mass, but it could make a difference. (When I need my first post-warranty clutch, I will be installing a lightened flywheel.)
4. Since I am no longer in the market for a new crank pulley, my vote doesn't count.
1. The original is indeed aluminum, but is a solid hunk of aluminum (with a rubber dampening donut) and is a solid hunk of metal (1" wide x 6.5" dia.) and weighs a few pounds.
2. A properly designed replacement will have a recessed cantilever design and weigh less than 8 ounces in aluminum, and something more if stainless.
3. Especially for the MT, you want the least possible spinning weight on the crankshaft to allow fast spin-up and spin-down of the engine during shifts. The increased weight of a stainless pulley designed to minimize weight might not add a lot of mass, but it could make a difference. (When I need my first post-warranty clutch, I will be installing a lightened flywheel.)
4. Since I am no longer in the market for a new crank pulley, my vote doesn't count.
#14
Both are the same
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
#15
Unhinged do you think the rubber portion of the pulley mentioned in 1 was there to damp supercharger crank pulley vibration and/or isolate the supercharger or engine from supercharger drive shock loads? If its there for either purpose maybe it is important for any aftermarket oversize pulley to have a similar feature.
One critical aspect is that the OEM Supercharger pulley is also neutral balanced (or at least very close - 1 gram at 4" from center.)
The more damping you've got on those pulleys the less NVH (noise, vibration & harshness) you're going to have.
That said there are a lot of OEM applications, including supercharged, that do not use similar dampers.
__________________
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
Stuart Dickinson
Managing Director
VelocityAP Industries Ltd.
O: (1)250-485-5126
E: Stuart@VelocityAP.com
www.velocityap.com
#16
I thought the dampener was on the accessory belt portion of the pulley and thus you could add a over-sized supercharger pulley without removing the dampener?
#17
Unhinged do you think the rubber portion of the pulley mentioned in 1 was there to damp supercharger crank pulley vibration and/or isolate the supercharger or engine from supercharger drive shock loads? If its there for either purpose maybe it is important for any aftermarket oversize pulley to have a similar feature.
Both the harmonic balancer which drives the accessories as well as the OEM SC pulley have the rubber isolating donuts.
#20