[HyperBlueX2]

Originally Posted by Ryephile

I took a short video of one of your dyno pulls.

Thanks!

[17ZL1]

Originally Posted by cwebster

That would make sense.



That seemed a little unkind...

Not trying to be a wise acre, but I don't know why it is so important anyway just take the crank HP and do 85% should be around 550HP if you need more do some mods?
ZL1

[cwebster]

Originally Posted by HyperBlueX2

Here was my run at the Rodgers Chevrolet show.... a bit disappointing...... everyone's numbers were low.....

A10.... sixth gear pull......

Not the lowest I've seen, though. There are a lot of factors to consider. If most of the other cars done that day were low, chances are that there were environmental factors involved. I listed and explained a number of factors in this secondary post in this thread "Other Factors Affecting Dyno Results"

Do you recall the mileage that was on your ZL1 at the time?

Originally Posted by Ryephile

Oh that was your car up there, cool. I don't think we got a chance to meet but your car sounded amazing.

FWIW, the other two stock 6th gen SS's made 370's, which percentage-wise vs. the SAE numbers makes sense with your A10 ZL1.

That's the thing about chassis dyno's, they're relative, rarely absolute.

All the correction factors and settings are an attempt to standardize results but, as you say, they're rarely consistent even on the same dyno from day to day.

The other factors I mentioned above have a lot to do with it.

--Cal

[Jhw_zl1]

I have a 2017 zl1 a10 had it dyno and it only made 495 the first pull an the second an third 475 ???

[ssrallyred]

Originally Posted by Jhw_zl1

I have a 2017 zl1 a10 had it dyno and it only made 495 the first pull an the second an third 475 ???

Mustang dyno ?

[HyperBlueX2]

Originally Posted by cwebster

Not the lowest I've seen, though. There are a lot of factors to consider. If most of the other cars done that day were low, chances are that there were environmental factors involved. I listed and explained a number of factors in this secondary post in this thread "Other Factors Affecting Dyno Results"

Do you recall the mileage that was on your ZL1 at the time?



All the correction factors and settings are an attempt to standardize results but, as you say, they're rarely consistent even on the same dyno from day to day.

The other factors I mentioned above have a lot to do with it.

--Cal

2600 miles.

[Jhw_zl1]

No it was dyno jet I think

[Jhw_zl1]

Originally Posted by ssrallyred

Mustang dyno ?

No it was dyno jet I'm pretty sure what's your thought on that ? I think it's wrong or his dyno is messed up or something

[Jhw_zl1]

Can anyone help me or tell me why my dyno pull was so low ? Iv called a few places an they have gave me some reasons an one told me I might wanna take my car to Chevy to have them look at the motor to see if it's running alright ?

[cwebster]

Originally Posted by Jhw_zl1

Can anyone help me or tell me why my dyno pull was so low ? Iv called a few places an they have gave me some reasons an one told me I might wanna take my car to Chevy to have them look at the motor to see if it's running alright ?

There are too many unknowns for anyone to hazard a guess on why your numbers were low on a particular dyno on the day you ran. I'm sure you've read my post on "Other Factors Affecting Dyno Results". Obvious factors would be: break-in (mileage, type driving), fuel (octane, alcohol content), air temp, humidity, altitude (barometric pres), dyno (accuracy, CF & smoothing factors, tie-down load, operator skill)...

Is the motor fully broken in?
Double-check your fuel - maybe try a different gas station.
Check the forecasts and schedule your dyno run on a cooler, dryer day.
Ensure the dyno operator turns off all the nannies and uses an commonly accepted CF (SAE or STD).

If there are no fault codes or malfunctions you can point to, your dealer's service dept. won't be able to do much but you could call and ask.

You might consider checking reputation of other speed shops in the Atlanta area. I did a Google search [dynos in atlanta ga] and came up with a list of 5. Search around to see what other's say about these shops and bring it to one that's favored.

Without knowing more, that's all I can think of.

[Evolvedx27]

why a 6th gear pull? why not 3rd?

[HyperBlueX2]

Originally Posted by Evolvedx27

why a 6th gear pull? why not 3rd?

That is what they chose...... they were looking for 2000 rpm at 45 mph to start the pull.... I am thinking it was to high.... Any other A10's chime in on what gear they used in their dyno pull?

My car runs very strong..... I know the numbers should be there.....

I will be having it properly dyno'ed in the next few months for some testing...... just figured it was there, what the heck.....

[17CamaroZL1]

Originally Posted by Evolvedx27

why a 6th gear pull? why not 3rd?

Most pulls are done in drive, which would be 7th on the A10, but I've heard of shops not wanting to spin their dyno past a certain speed, so maybe that's why they chose 6th.

[Evolvedx27]

Originally Posted by 17CamaroZL1

Most pulls are done in drive, which would be 7th on the A10, but I've heard of shops not wanting to spin their dyno past a certain speed, so maybe that's why they chose 6th.

sounds like an A10 problem...