Dyno Day

[SYT_Shadow]

Originally Posted by Project M4GTS

Yes, thats about right on 93 and catless give or take a few. Those numbers will vary depending on car and I know some guys were running a mix of e85 hence the higher number runs.

The one key thing you notice with any OTS tune for the s55 is the crazy increase in torque. My car clearly doesnt show that is more along the lines for a stock map. Sooooo yeah...seems some bolt on mods puts down some nice power!

One thing that keeps me with the stock tunes on the CS and GTS1/2 is I have zero interest in a giant, stupid torque hump at 3500rpm. That will make exiting corners way too hard

[JustAnothaM4]

Exactly!!! I definitely don't want that crazy torque jump between 3k-4k rpm. It's already bad enough putting power down early getting out of corners without losing the rear.

[JustAnothaM4]

Originally Posted by Wanted_M

Which ones?

I think these ones.

https://www.oreillyauto.com/shop/b/i...5/76bbf7c4bb16

[heitzke]

Originally Posted by Project M4GTS

I'm glad you noticed that. The power delivery for the GTS is rather different from other variations. My torque.horespower doesn't cross paths until around 5800 rpm. The torque is very linear all the way to 6k rpm then it dies. I believe the GTS peak boost is around 21 unlike base/comp models.

Ah! I meant more in a sense that all dyno sheets cross hp/torque at 5252 due to the way that they're calculated/intertwined. I just wonder if there was some correction factor on the numbers that caused it to read differently.

It is really cool to see some GTS dyno sheets either way, I was always curious how they fared with bolt-on's, etc.

[JustAnothaM4]

Originally Posted by heitzke

Ah! I meant more in a sense that all dyno sheets cross hp/torque at 5252 due to the way that they're calculated/intertwined. I just wonder if there was some correction factor on the numbers that caused it to read differently.

It is really cool to see some GTS dyno sheets either way, I was always curious how they fared with bolt-on's, etc.

Yeah idk…I did see the smoothing value on my chart is a 3 when all others show 5. Also the hp goes up to 600 and the torque goes up to 550 on the graph. Most other charts show both hp and tq values to be the same.

[SYT_Shadow]

Originally Posted by Project M4GTS

Yeah idk…I did see the smoothing value on my chart is a 3 when all others show 5. Also the hp goes up to 600 and the torque goes up to 550 on the graph. Most other charts show both hp and tq values to be the same.

Do you have the DRF file from the dyno? I'd love to compare vs my CS and GTS files

[heitzke]

Originally Posted by Project M4GTS

Yeah idk…I did see the smoothing value on my chart is a 3 when all others show 5. Also the hp goes up to 600 and the torque goes up to 550 on the graph. Most other charts show both hp and tq values to be the same.

Oh! I totally missed that fact with the axis values being different, that's probably exactly what it is.

[JustAnothaM4]

Originally Posted by SYT_Shadow

Do you have the DRF file from the dyno? I'd love to compare vs my CS and GTS files

Unfortunately I don't have the file.

[VCP]

Originally Posted by Project M4GTS

Here you go

https://youtube.com/shorts/WSXMWEBMITI?feature=share

Good motor you have there. Here is my baseline from Aug 2016. Second day in country after ED tour putting 3600 not gentle Km's on her. Very strong.

[CanAutM3]

Beautiful car, and those wheels

[horsepower_and_hounds]

Originally Posted by SYT_Shadow

One thing that keeps me with the stock tunes on the CS and GTS1/2 is I have zero interest in a giant, stupid torque hump at 3500rpm. That will make exiting corners way too hard

You could always do stg1/2 & tq by gear to flatten it out.......