S54 Dyno Database

[ZiMMie]

Here is a quote and plot from my tuner. The loss of torque can be almost completely mitigated with a proper tune on a stand alone EMS.

"Make sure you have a pretty much open 3.5” exhaust, otherwise will lose huge power.

Here is a SSV1 complete, swapped over to the AR header (only change). Both tuned on same dyno, both by us, both on Emtron. Note – SAE number too."

What other mods does the car have?

[stash1]

Here is a quote and plot from my tuner. The loss of torque can be almost completely mitigated with a proper tune on a stand alone EMS.

"Make sure you have a pretty much open 3.5” exhaust, otherwise will lose huge power.

Here is a SSV1 complete, swapped over to the AR header (only change). Both tuned on same dyno, both by us, both on Emtron. Note – SAE number too."

Would your tuner mind sharing what he's done differently (tuning wise) w/the stand alone vs. modifying factory maps, to retain low-end torque? Also, keep in mind that a proper stand alone set up can run into the $3k plus range, and while it's pretty awesome...99.9% of folks will never go stand alone-for that reason.

[///Mangler]

Which curve is which?

Red is ARH

T

[duracellttu]

Here is a quote and plot from my tuner. The loss of torque can be almost completely mitigated with a proper tune on a stand alone EMS.

"Make sure you have a pretty much open 3.5” exhaust, otherwise will lose huge power.

Here is a SSV1 complete, swapped over to the AR header (only change). Both tuned on same dyno, both by us, both on Emtron. Note – SAE number too."

Which curve is which?

[///Mangler]

Hey Anri, I'm not 100% sure that they're actually even advertised as equal length or not-lol But yeah, as we all know now, it's a compromised design. Poor low-end performance w/some pretty good top-end w/the right tuning.😉

Here is a quote and plot from my tuner. The loss of torque can be almost completely mitigated with a proper tune on a stand alone EMS.

"Make sure you have a pretty much open 3.5” exhaust, otherwise will lose huge power.

Here is a SSV1 complete, swapped over to the AR header (only change). Both tuned on same dyno, both by us, both on Emtron. Note – SAE number too."

[DoubleSidedTape]

288/280 cams, Megan headers, everything else stock. Tuned by HTE.

[stash1]

Stan,

I have not seen the ARH in person to compare the length
of the tubes to other brand headers. The longer the better.
From pictures looks like they are equal length and that is
a good thing.

ARH did something a bit wrong and reason for 5k rpm
and up of operation.

Regards,
Anri.

Hey Anri, I'm not 100% sure that they're actually even advertised as equal length or not-lol But yeah, as we all know now, it's a compromised design. Poor low-end performance w/some pretty good top-end w/the right tuning.😉

[Anri]

Not sure if this has been posted in here, but here’s a recent dyno test of the ARH header system by Buildjournal:

https://thebuildjournal.com/reviews/...ts-and-review/

The data looks pretty consistent w/my own personal experience as well.

Stan,

I have not seen the ARH in person to compare the length
of the tubes to other brand headers. The longer the better.
From pictures looks like they are equal length and that is
a good thing.

ARH did something a bit wrong and reason for 5k rpm
and up of operation.

Regards,
Anri.

[fourmula1]

342hp on a dynojet
2003.5 dedicated track car ~93k miles...a lot of them on the track.
karb csl intake, catless headers, oem section 1 & 2, old agency power section 3
suspected fuel pressure issue...

If anyone has recommendations for troubleshooting fuel pressure issues in order of most likely culprits to least likely that would be helpful. Fuel filter under the car was just replaced. I'll replace the fuel pressure regulator next. Fuel pump after that?

[stash1]

Not sure if this has been posted in here, but here’s a recent dyno test of the ARH header system by Buildjournal:

https://thebuildjournal.com/reviews/...ts-and-review/

The data looks pretty consistent w/my own personal experience as well.

[Nick_P]

Stock cams?

Yes, stock cams. No other engine mods

[repoman89]

Evolve CSL airbox and full SS exhaust with cats, made ~331whp/ 247 torque…not bad. Did a run at ~338whp but decided to dial it down a bit for safety. This was on dynojet with AlphaN tune from Epic.

Stock cams?

[Nick_P]

Evolve CSL airbox and full SS exhaust with cats, made ~331whp/ 247 torque…not bad. Did a run at ~338whp but decided to dial it down a bit for safety. This was on dynojet with AlphaN tune from Epic.

[jet_dogg]

Looks down on power for the mods.

[stash1]

Looks too lean upto 6/6.5k if the o2 is to be trusted

Ya, you never know how accurate any of these guy’s snifers really are at the end of tha day!? All you can do is tune for optimum power, run quality fuel, and then try and manage the heat in the motor whether it be on the street or on the track., and then hope that the actual AFR's are within safe limits.