2014 Viper T/A + Arrow PCM dyno

[hova00]

I just recently had my Arrow PCM installed on my T/A and was able to get it to the dyno right after to get some dyno#'s before my ARH headers go on in a week. I wasn't able to get a before and after from stock pcm to the Arrow pcm at this time but plan on switching back to the stock pcm and dynoing again before my header install.

My 1st impressions after the Arrow pcm was the sound of the car changed for the better and couldn't believe that it made such a difference in that dept. along with not having all of the black soot to clean from the exhaust on the outlets anymore since it is running much leaner.

Car made 559whp/530 ft. lbs and this is SAE#'s here is a short video of it

[Steve M]

It's amazing what adding a little timing and leaning these cars out can do...those are nice numbers.

[viper04]

Nice, please keep us posted.

[serpent]

is the upgrade noticeable when accelerating?
2nd video is private.

I know i have a long way to go as far as learning these gen V's, but is there a reason Dodge overrated the engine power numbers? @559rwhp, with a 12% drivetrain loss that is 626hp.

[Jack B]

Use 15% for ir cars

is the upgrade noticeable when accelerating?
2nd video is private.

I know i have a long way to go as far as learning these gen V's, but is there a reason Dodge overrated the engine power numbers? @559rwhp, with a 12% drivetrain loss that is 626hp.

[serpent]

^ Thanks, that makes perfect sense.

[SammutRacing]

Nice #s. Was it a mustang dyno or dynojet?

[WDW MKR]

is the upgrade noticeable when accelerating?
2nd video is private.

I know i have a long way to go as far as learning these gen V's, but is there a reason Dodge overrated the engine power numbers? @559rwhp, with a 12% drivetrain loss that is 626hp.

Using 12% loss gives you 635 bhp @ 559 rwhp. Drivetrain loss of 15% equates to 657 bhp.

[hova00]

Nice #s. Was it a mustang dyno or dynojet?

Dynojet was used

[1.8t]

I know i have a long way to go as far as learning these gen V's, but is there a reason Dodge overrated the engine power numbers? @559rwhp, with a 12% drivetrain loss that is 626hp.

I know you have already read the others posts, but don't forget the rear gear in this car eats more power than usual since it is a 3.55.

[hova00]

don't know if it matters but the shop didn't turn off the traction control

[mjorgensen]

don't know if it matters but the shop didn't turn off the traction control

It does matter, the traction needs to be off, the stability can stay on though. After a few pulls the ESC service light and ABS will light up and after that it won't matter. Both lights will reset after you drive a little bit on the road.

[hova00]

I didn't see any service lights right after it came off the dyno so maybe the guy did turn it off. This shop is a big corvette shop so they don't see to many vipers.

[swexlin]

Dynojet was used

Looking good. Is RPM going to do your header install as well?

[hova00]

Looking good. Is RPM going to do your header install as well?

RPM will be doing the header install. I don't have any real experience with them or their work but came recommended from Steve@ARH

[Orange TA]

Are you sure the Arrow PCM has been installed already? The reason I ask is because bone stock Gen Vs typically put down around the same numbers on the same dyno (Dynojet). For example:

http://www.youtube.com/watch?v=ZrTyJXIyeEY

[Nine Ball]

Are you sure the Arrow PCM has been installed already? The reason I ask is because bone stock Gen Vs typically put down around the same numbers on the same dyno (Dynojet). For example:

http://www.youtube.com/watch?v=ZrTyJXIyeEY

Every dyno is different. They aren't intended for cross country comparisons. Only before/after gains on the same dyno matter.

[Orange TA]

Other dynos I'd tend to agree with you. But you absolutely can compare numbers from one specific Dynojet model to another, provided you use the same correction factor.

Every dyno is different. They aren't intended for cross country comparisons. Only before/after gains on the same dyno matter.

[Junkie]

Conditions still change. I know I've had cars in the past on the same dyno weeks apart, same correction factory, same tire, same mods, different number….

[Orange TA]

That's more than likely something in the car changing rather than the dyno. While to you, nothing may have changed with the car, there's a lot that can change without you knowing it. Engines can gain or lose power from breaking in or from components wearing out, such as piston rings leading to less compression. Tons of other variables too such as on a turbo car temperature can affect boost pressure along with other parts of the tune. I know you've had some pretty high horsepower cars in the past so these kinds of things would affect you even more, not to mention say 20whp difference on one day at the dyno compared to the next is not huge if the car is making let's say 1500whp. That 20whp may sound like a big number to be off on the dyno but it only represents a change of 1.3% on a 1500whp car. 20whp on a 500whp car would of course have 3x much impact, as it would represent a 4% difference.

Bottomline is when you're comparing more or less stock cars like a gen v, it's going to dyno pretty damn consistently on a Dynojet, whether that Dynojet is in California or Tokyo or wherever, just as long as it's the same model Dynojet and you're using the same correction factor. Any variances are more likely related to changes with the car, such as my examples above.

Conditions still change. I know I've had cars in the past on the same dyno weeks apart, same correction factory, same tire, same mods, different number….

[hova00]

Are you sure the Arrow PCM has been installed already? The reason I ask is because bone stock Gen Vs typically put down around the same numbers on the same dyno (Dynojet). For example:

http://www.youtube.com/watch?v=ZrTyJXIyeEY

You cant compare #'s from 2 dynos from different places. The video you posted is funny because it shows them disconnecting the ecu before they dyno the car don't really know what that is about.

Either way car is going back with stock PCM to see what my gains are from the Arrow racing PCM. I could care less what the dyno #'s are Iam just using them for a measurement of my gains with each mod.

[Orange TA]

Read my reply to "Nine Ball" above. You absolutely can compare numbers from one Dynojet to another, assuming that it's the same model Dynojet and the same correction factor is used. That's one of the nice things about Dynojets.

To further validate my point, if you look around this forum and the Internet, you'll see that most stock Gen Vs dyno within the same 5-10whp on a Dynojet, regardless of where they're located. The lower numbers are most likely from "green" motors, not the dyno itself. Either way, the numbers have been surprisingly consistent. And yours is right there with the rest of the stock Gen V cars which is odd considering you have the Arrow PCM installed.

You cant compare #'s from 2 dynos from different places. The video you posted is funny because it shows them disconnecting the ecu before they dyno the car don't really know what that is about.

Either way car is going back with stock PCM to see what my gains are from the Arrow racing PCM. I could care less what the dyno #'s are Iam just using them for a measurement of my gains with each mod.

[Gonabite]

Read my reply to "Nine Ball" above. You absolutely can compare numbers from one Dynojet to another, assuming that it's the same model Dynojet and the same correction factor is used. That's one of the nice things about Dynojets.

To further validate my point, if you look around this forum and the Internet, you'll see that most stock Gen Vs dyno within the same 5-10whp on a Dynojet, regardless of where they're located. The lower numbers are most likely from "green" motors, not the dyno itself. Either way, the numbers have been surprisingly consistent. And yours is right there with the rest of the stock Gen V cars which is odd considering you have the Arrow PCM installed.

Sure you can compare, however it does not mean they are accurate comparisons. Regardless if they are the same dyno models and correction factor being used. The size of the rollers that is used on the dynojet changes the equation, the tie down method changes the equation.

Like Junkie said same car same dyno different numbers. Could have been related to how the car was tied down and how tight is was strapped down compared to the last time. The tie down plays a decent roll in your numbers.

[Orange TA]

You're talking about very very trivial differences now. You'll see a bigger difference dynoing the same car on the same exact dyno on the same day from one run to the next, just from external factors beyond your control, such as engine coolant temps climbing.

Again, we're not talking exact comparisons to the precise tenth of a wheel horsepower. But by and large, the premise behind the Dynojet and their claim to fame, is that numbers from one Dynojet to the next are comparable assuming you use the same correction factor. This is not the case for other types of dynos. And generally speaking, the OP is putting down roughly the same WHP as the dozen or so other Gen Vs that were dynoed on a Dynojet except they were all stock with a stock PCM.

[Jack B]

I have to agree with you. The dyno shop that I used on my G1 and G2 was a fabricator for Dynojet. In a five year period they had at least four different dyno's, these were above-ground units and all of them read the same on my car. In addition, when we started tuning the Gen2's back in in 2000-2005, virtually all the cars dyno'ed the same if they had the same mods. Again, this was when the pull was on a Dynojet. In addition, the Dynojet seems to always be 5-7% higher than the Mustang.

The closest dyno shop to me runs a Mustang. When I asked him about the posted hp differences between the Mustang and the Dynojet, he indicated that for those that had previously dyno'ed on a Dynojet, the Mustang has a simulation program that mirrors a Dynojet. He did not recommend it, he was just making a comment.

You're talking about very very trivial differences now. You'll see a bigger difference dynoing the same car on the same exact dyno on the same day from one run to the next, just from external factors beyond your control, such as engine coolant temps climbing.

Again, we're not talking exact comparisons to the precise tenth of a wheel horsepower. But by and large, the premise behind the Dynojet and their claim to fame, is that numbers from one Dynojet to the next are comparable assuming you use the same correction factor. This is not the case for other types of dynos. And generally speaking, the OP is putting down roughly the same WHP as the dozen or so other Gen Vs that were dynoed on a Dynojet except they were all stock with a stock PCM.