Stage IV kit
#1
03-16-2017, 10:39 PM
#2
03-16-2017, 11:21 PM
Stage I
Join Date: Mar 2017
Location: Mineral Point, WI
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Ordered & paid for my stage IV kit February 3rd. ETA had been pushed back twice to April 7th. Called the motor company's customer service and tried to raise hell two weeks ago and again last week; was told they could be no help as the kit comes direct from a 3rd party vendor. Kit was delivered to the dealership this Monday, 3/13 and scheduled to be installed by next week.
#3
03-17-2017, 05:10 AM
Join Date: Aug 2008
Location: Lafayette, Louisiana
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#5
03-17-2017, 09:01 AM
There will be no comparison between the 2 kits when using an exhaust like the d@d 2into1 and a non emission cam like the woods 999. As long as you don't care about engine warranty this engine has a ton of potential.
#7
03-17-2017, 10:34 AM
Join Date: Aug 2008
Location: Lafayette, Louisiana
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Stage IV gives more horsepower than stage III.
Stage IV is slightly biased towards mid to upper rpm whereas stage III is slightly biased towards to low to mid rpm.
Stage IV produces less torque than stock at less than three thousand rpm.
http://www.harley-davidson.com/webap...entryId=221577
If you are going to go with woods cam etc. then contact fuel moto for everything.
Last edited by Prot; 03-17-2017 at 10:47 AM.
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#8
03-17-2017, 10:57 AM
Stage III gives more torque than stage IV.
Stage IV gives more horsepower than stage III.
Stage IV is slightly biased towards mid to upper rpm whereas stage III is slightly biased towards to low to mid rpm.
Stage IV produces less torque than stock at less than three thousand rpm.
http://www.harley-davidson.com/webap...entryId=221577
Stage IV gives more horsepower than stage III.
Stage IV is slightly biased towards mid to upper rpm whereas stage III is slightly biased towards to low to mid rpm.
Stage IV produces less torque than stock at less than three thousand rpm.
http://www.harley-davidson.com/webap...entryId=221577
TORQUE:
* stock has the strongest trq between 2000-2500
* stage 3 & 4 have about equal trq across the entire rpm spectrum
* stage 3 & 4 will surpass stock in trq above 3000 rpms
HP:
* stock is dead above 3500-4000
* stage 3 pulls far stronger than stock above 3500
* stage 4 pulls even stronger than stage 3 above 3500
The problem with Stage 4 is that with the factory map you're going to smack up against the rpm limiter before you reach max hp in 4,5,6 gears. So unless you plan to have the bike tuned with an aftermarket tuner AND a freer flowing exhaust you're wasting your money on the stage 4. Also if you don't use an aftermarket tuner to eliminate the 5800 rpm limiter and 107 mph limiter, you'll never realize the full hp potential of the stage 4.
In summary: if you mostly ride between 2-3000 rpms, you'll be disappointed in both stage 3 & 4. If you do alot of riding above 3500, then stage 3 has a nice bang for the buck. If you want max hp to redline, then stage 4 is your best bet but you'll need to go with a freer flowing exhaust and aftermarket tuner to make the stage 4 worth the effort and money. Trust me, I've ridden all three setups and have the dynos.
Last edited by Heatwave; 03-17-2017 at 11:05 AM.
#9
03-17-2017, 11:16 AM
Join Date: Aug 2008
Location: Lafayette, Louisiana
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Not really. I had the stage 3 installed on my CVO LImited. Then i had the Stage 4 installed (minus the cyl/pistons since they were installed with stage 3). Here's how the performance compares vs stock:
TORQUE:
* stock has the strongest trq between 2000-2500
* stage 3 & 4 have about equal trq across the entire rpm spectrum
* stage 3 & 4 will surpass stock in trq above 3000 rpms
HP:
* stock is dead above 3500-4000
* stage 3 pulls far stronger than stock above 3500
* stage 4 pulls even stronger than stage 3 above 3500
The problem with Stage 4 is that with the factory map you're going to smack up against the rpm limiter before you reach max hp in 4,5,6 gears. So unless you plan to have the bike tuned with an aftermarket tuner AND a freer flowing exhaust you're wasting your money on the stage 4. Also if you don't use an aftermarket tuner to eliminate the 5800 rpm limiter and 107 mph limiter, you'll never realize the full hp potential of the stage 4.
In summary: if you mostly ride between 2-3000 rpms, you'll be disappointed in both stage 3 & 4. If you do alot of riding above 3500, then stage 3 has a nice bang for the buck. If you want max hp to redline, then stage 4 is your best bet but you'll need to go with a freer flowing exhaust and aftermarket tuner to make the stage 4 worth the effort and money. Trust me, I've ridden all three setups and have the dynos.
TORQUE:
* stock has the strongest trq between 2000-2500
* stage 3 & 4 have about equal trq across the entire rpm spectrum
* stage 3 & 4 will surpass stock in trq above 3000 rpms
HP:
* stock is dead above 3500-4000
* stage 3 pulls far stronger than stock above 3500
* stage 4 pulls even stronger than stage 3 above 3500
The problem with Stage 4 is that with the factory map you're going to smack up against the rpm limiter before you reach max hp in 4,5,6 gears. So unless you plan to have the bike tuned with an aftermarket tuner AND a freer flowing exhaust you're wasting your money on the stage 4. Also if you don't use an aftermarket tuner to eliminate the 5800 rpm limiter and 107 mph limiter, you'll never realize the full hp potential of the stage 4.
In summary: if you mostly ride between 2-3000 rpms, you'll be disappointed in both stage 3 & 4. If you do alot of riding above 3500, then stage 3 has a nice bang for the buck. If you want max hp to redline, then stage 4 is your best bet but you'll need to go with a freer flowing exhaust and aftermarket tuner to make the stage 4 worth the effort and money. Trust me, I've ridden all three setups and have the dynos.
Apples to oranges when you are dealing with a cvo.
Look at the the dyno sheets in the link I posted that compare a regular M8 stage iii with a regular M8 stage IV.
Sure, the stage IV does have more potential, but using HD parts in those two kits, the IV has more horsepower, the iii has more torque, and the IV has less torque below 3,000 rpm than stock according to the dyno sheets on Harley's own website.
An interesting comparison is a regular M8 with the stage iii with a stock cvo.
Last edited by Prot; 03-17-2017 at 11:18 AM.