2014 Viper T/A + Arrow PCM dyno

[Nine Ball]

Orange TA,

Have you ever operated a Dynojet yourself? Have you ever tuned cars on a Dynojet, yourself? I have, 100x of times, on various cars.

If you have, you'd understand that you don't simply "use the same correction factor". The correction factor is calculated by the software, based on the ambient conditions that are either typed into the software, or measured automatically. You don't get to pick that factor.

Houston has a LOT of dyno shops. Many of them use the popular Dynojet 248 model. Some read notoriously higher, some read lower. The dyno is a tool for measuring before/after gains, not something used for comparing bench racing notes across town. Any time you introduce variables and potential operator or ambient measurement tolerances, results can vary. As mentioned, some shops also do silly tricks to enhance numbers, such as looser straps, more air in the tires, fudged ambient inputs, less smoothing, etc..

So no, don't get into a habit of comparing dynos from different shops. That is simply a bad practice, period.

[Orange TA]

Yes, I have. I've been using them to tune cars since 2001. By "correction factor" I was actually referring to the correction method, such as SAE or STD.

Orange TA,

Have you ever operated a Dynojet yourself? Have you ever tuned cars on a Dynojet, yourself? I have, 100x of times, on various cars.

If you have, you'd understand that you don't simply "use the same correction factor". The correction factor is calculated by the software, based on the ambient conditions that are either typed into the software, or measured automatically. You don't get to pick that factor.

Houston has a LOT of dyno shops. Many of them use the popular Dynojet 248 model. Some read notoriously higher, some read lower. The dyno is a tool for measuring before/after gains, not something used for comparing bench racing notes across town. Any time you introduce variables and potential operator or ambient measurement tolerances, results can vary. As mentioned, some shops also do silly tricks to enhance numbers, such as looser straps, more air in the tires, fudged ambient inputs, less smoothing, etc..

So no, don't get into a habit of comparing dynos from different shops. That is simply a bad practice, period.

[Orange TA]

If it's such "bad practice" to compare numbers from one Dynojet to the next, then why do stock Gen Vs all across the country dyno roughly the same (within 1-2%) on a Dynojet? The proof is in the pudding. Any other dyno, I'd absolutely agree with you. But not the Dynojet.

[Orange TA]

Any variances you've seen from one Dynojet 248 to the next is more likely due to changes in the car rather than the dyno. Rising coolant temps, inadequate cooling, weather conditions affecting boost or other tuning parameters, an engine breaking in with more miles (Gen Vs will make a good bit more power with more miles), etc, etc.

You say the dyno is a tool for measuring before/after gains but on a Dynojet you typically see differences from one run to the next. That's the same day/same car/same dyno/same session. Again, these are differences related to the car, not the dyno itself.

[Nine Ball]

I cannot win an argument with someone who thinks racing dyno sheets across states is valid. Carry on.

[FLATOUT]

If it's such "bad practice" to compare numbers from one Dynojet to the next, then why do stock Gen Vs all across the country dyno roughly the same (within 1-2%) on a Dynojet? The proof is in the pudding. Any other dyno, I'd absolutely agree with you. But not the Dynojet.

Yeah this is a complete bs statement. They are all over the map. I have had my car on probably 4 different dyno jets in the Houston area, a Mustang, and a Land and Sea dyno and they all differ by as much as 60rwhp. Dyno's are literally a tunning tool and nothing else.

Pick a dyno to test all of your mods on or baseline and always go back to that same dyno for the most accurate description of whether or not you're making more or less power post modification or tune.

Watch the TX2K14 dyno day video from last year. Hennesey's dyno is a heart breaker and it's hilarious to see everyone guess what they are going to make, most people coming straight off of their home dyno's where they tune. I was the first victim in that video lol. My car had just made 3 days prior 615rwhp SAE on Serious HP's dyno jet and they it rolls 586 and 599 at Henesseys.

[Orange TA]

You must've missed the entire thread. We're talking about comparing ONLY specific Dynojet dynos, not one type of dyno to another. Of course those vary wildly. Not the case with the Dynojet.

Yeah this is a complete bs statement. They are all over the map. I have had my car on probably 4 different dyno jets in the Houston area, a Mustang, and a Land and Sea dyno and they all differ by as much as 60rwhp. Dyno's are literally a tunning tool and nothing else.

Pick a dyno to test all of your mods on or baseline and always go back to that same dyno for the most accurate description of whether or not you're making more or less power post modification or tune.

Watch the TX2K14 dyno day video from last year. Hennesey's dyno is a heart breaker and it's hilarious to see everyone guess what they are going to make, most people coming straight off of their home dyno's where they tune. I was the first victim in that video lol. My car had just made 3 days prior 615rwhp SAE on Serious HP's dyno jet and they it rolls 586 and 599 at Henesseys.

[FLATOUT]

You must've missed the entire thread. We're talking about comparing ONLY specific Dynojet dynos, not one type of dyno to another. Of course those vary wildly. Not the case with the Dynojet.

Bullshit I listed 4 dynojets in my response to you and those varied just as much.

[Orange TA]

60whp difference from the same type of Dynojet? LOL, sure. You're probably comparing different types of Dynojets. You can't do that.

Bullshit I listed 4 dynojets in my response to you and those varied just as much.

[FLATOUT]

60whp difference from the same type of Dynojet? LOL, sure. You're probably comparing different types of Dynojets. You can't do that.

I just told you that I wasn't (comparing dyno jet numbers to non dynojet numbers. I have been on other machines but I have seen dynojets vary that much as well) so you either aren't reading or will only believe what your own personal experiences have been.

Do you work for Dynojet or something?

[Orange TA]

Read your previous two responses again. You contradicted yourself.

[Viper Girl]

Arrow PCM chat anyone?

Orange TA please stop the dynojet argument this isn't going anywhere productive.

[FLATOUT]

I'll make this very simple for you:

Dyno'd in Houston area on 4 different dynojets and saw as much as a 60rwhp difference between them on same car.

I have also dyno'd on a Mustang, Land & Sea, and Dynopack hubcentric dyno and also seen numbers all over the place.

[Orange TA]

I'll make it even simpler: Post the two dyno graphs from the same car on the two SAME MODEL Dynojets in question. I feel like you guys are just arguing with me for the sake of arguing even though you know you're wrong.

The OP's car makes roughly the same power as 10-15 other stock Gen V cars, all dynoed on Dynojets throughout the country. His car has an Arrow PCM. Something doesn't jive.

I'll make this very simple for you:

Dyno'd in Houston area on 4 different dynojets and saw as much as a 60rwhp difference between them on same car.

I have also dyno'd on a Mustang, Land & Sea, and Dynopack hubcentric dyno and also seen numbers all over the place.

[Viper Girl]

Orange TA, drop the argument, they don't have to prove anything to you... the thread isn't about dynojets.

Lets get back to talking about the arrow pcm, this isn't a forum where arguing for the sake of arguing is ok. Approx half of this thread falls under purposeless inflammatory posts.
Stop now

[plumcrazy]

Yall need to stay on topic

[Orange TA]

This is completely on topic with the OP's car being dynoed on a Dynojet with the Arrow PCM. His car makes the same power as other Gen Vs which are stock, so I'm wondering if there are no real gains to be had with the Arrow PCM unless you have supporting mods, such as headers. That's all.

Orange TA, drop the argument, they don't have to prove anything to you... the thread isn't about dynojets.

Lets get back to talking about the arrow pcm, this isn't a forum where arguing for the sake of arguing is ok. Approx half of this thread falls under purposeless inflammatory posts.
Stop now

[Viper Girl]

Sorry, you are the one who made more than half of this thread about an argument on dynojets. The thread had a productive discussion going on before that argument started, rendering the thread barely readable.
That's not the type of forum this is.

[whitebeard]

Please keep the discussion on target, I was following the conversation until we went off topic.


EDIT: Who is this YALL guy?

[FLATOUT]

Back to the Arrow PCM thanks Mods!

[mjorgensen]

We have seen cars with lower numbers than others stock to stock and even on a car with lower than "should be numbers" the Arrow PCM made +24rwhp so I know it works, there are just some variations between cars out there.

[Jack B]

We eat our own and we are redundant.

Sorry, you are the one who made more than half of this thread about an argument on dynojets. The thread had a productive discussion going on before that argument started, rendering the thread barely readable.
That's not the type of forum this is.

- - - Updated - - -

We eat our own.

Sorry, you are the one who made more than half of this thread about an argument on dynojets. The thread had a productive discussion going on before that argument started, rendering the thread barely readable.
That's not the type of forum this is.

[hova00]

going back wed. for some dyno runs with the stock pcm for a true apples to apples comaparison.

[Jack B]

Watch the IAT and af.

going back wed. for some dyno runs with the stock pcm for a true apples to apples comaparison.

[SammutRacing]

going back wed. for some dyno runs with the stock pcm for a true apples to apples comaparison.

any update?