[Cristian135]

Hello friends, I would like someone to tell me which one does more hp? 100-200 times? What is the most aggressive melody? Thank you!

[SeanWRT]

From recent logs I've read, MHD STG2+ is more aggressive, but that does not mean more power. It all comes down to the octane support. You will need RON100~102 to properly do it.

BM3 STG2 is made for RON98/AKI93 with adequate cooling upgrade.

But if you have access to RON105~109 or Ethanol on a regular basis, you can do BM3 race gas or E30 map, which is more powerful than all said above.

[Cristian135]

in my area I only have 98oct but good quality shell vpower, how many psi mhd 2+? thank you

[SeanWRT]

Originally Posted by Cristian135

in my area I only have 98oct but good quality shell vpower, how many psi mhd 2+? thank you

You can damage your engine and make less power running RON100+ map on RON98 gas. Difference between RON100+ and 98 is huge.

Keep in mind High quality gas isn't high octane.

I can tell you 98RON don't even handle 98RON map well if you do back to back multiple gear pulls and/or IAT goes to triple digit which is normal. 100+ map would throw your ignition all over the place and even your butt dyno would tell car's running like shit.

Flash tune is no piggyback. There is no fixed boost target set with either bm3 or MHD, it all depends on IAT. MHD crack up boost as high as possible low down, while BM3 more and more tend to make flat torque plateau revision after revision. It's up to your taste.

You need to go either BM3 stg2 98 map or mhd 98 map (stg2 no plus).

[Cristian135]

Thanks seanwrt good information!

[Bee Pee]

Originally Posted by SeanWRT

You can damage your engine and make less power running RON100+ map on RON98 gas. Difference between RON100+ and 98 is huge.

Keep in mind High quality gas isn't high octane.

I can tell you 98RON don't even handle 98RON map well if you do back to back multiple gear pulls and/or IAT goes to triple digit which is normal. 100+ map would throw your ignition all over the place and even your butt dyno would tell car's running like shit.

Flash tune is no piggyback. There is no fixed boost target set with either bm3 or MHD, it all depends on IAT. MHD crack up boost as high as possible low down, while BM3 more and more tend to make flat torque plateau revision after revision. It's up to your taste.

You need to go either BM3 stg2 98 map or mhd 98 map (stg2 no plus).

A number of folk running mhd 2+ 102ron map here in the uk on 99ron wo issue and repeatedly more oomph everywhere than 98ron....

[SeanWRT]

Originally Posted by Bee Pee

A number of folk running mhd 2+ 102ron map here in the uk on 99ron wo issue and repeatedly more oomph everywhere than 98ron....

I believe so. There is certain degree of IAT tolerance with different octane level.

For example, when I was on Dinan Turbo one year ago, it put down "glorious" 414whp on RON98 on a dynojet where M4 ZCP stock didn't even break 400 on the same day.

The ambient was as cold as 50F, the 5th gear pulls can hardly heat IAT up to above 80F. 4 cylinders out of 6 saw timing capped out at 10 degrees up top and the other 2 had just minor corrections, a sign of running on the edge already. However, on hotter days and when IAT gets above 90F, it shows more corrections and power loss, definitely need higher octane to support.

My point is you can find very ideal condition for a low octane to run well on an aggressive map, but that doesn't change the fact the map isn't made for it.

You really need to push hard in summer. Log repeated multiple gear pulls, see how it's holding up at IAT 120F. Under that condition the most of aftermarket tunes cannot even live up to their map octane claim.

[Bee Pee]

Originally Posted by SeanWRT

I believe so. There is certain degree of IAT tolerance with different octane level.

For example, when I was on Dinan Turbo one year ago, it put down "glorious" 414whp on RON98 on a dynojet where M4 ZCP stock didn't even break 400 on the same day.

The ambient was as cold as 50F, the 5th gear pulls can hardly heat IAT up to above 80F. 4 cylinders out of 6 saw timing capped out at 10 degrees up top and the other 2 had just minor corrections, a sign of running on the edge already. However, on hotter days and when IAT gets above 90F, it shows more corrections and power loss, definitely need higher octane to support.

My point is you can find very ideal condition for a low octane to run well on an aggressive map, but that doesn't change the fact the map isn't made for it.

You really need to push hard in summer. Log repeated multiple gear pulls, see how it's holding up at IAT 120F. Under that condition the most of aftermarket tunes cannot even live up to their map octane claim.

Agreed obvs colder climate / ambient is better but despite very hot temps we've had in the uk earlier this summer the users haven't had any issues wrt to timing pulls even at TDs using 102ron maps.

I've concluded that mhd leave a fair bit of safety margin even in stg2+ compared to BM3 stg 2.....

[Tricki]

Running MHD stage2+ 102 Map!!
I only have 98ron but add 4ltrs to a tank for additional fueling without effecting fuel pump pressure.

Log attached with 100-200 times of low to mid 9's.

https://datazap.me/u/mattspies/log-1...30-31-32-33-34

https://datazap.me/u/mattspies/log-1...30-31-32-33-34

https://datazap.me/u/mattspies/log-1...34&zoom=39-183

[horsepower_and_hounds]

Originally Posted by Tricki

Running MHD stage2+ 102 Map!!
I only have 98ron but add 4ltrs to a tank for additional fueling without effecting fuel pump pressure.

Log attached with 100-200 times of low to mid 9's.

https://datazap.me/u/mattspies/log-1...30-31-32-33-34

https://datazap.me/u/mattspies/log-1...30-31-32-33-34

https://datazap.me/u/mattspies/log-1...34&zoom=39-183

Logs look great.... your ambient temps are super cool. Upper 70's at pull start and top out at upper 80's. Your hitting good boost & timing. What IC air you running?

[Tricki]

Originally Posted by m2ruder

Logs look great.... your ambient temps are super cool. Upper 70's at pull start and top out at upper 80's. Your hitting good boost & timing. What IC air you running?

Thx ,

Wagner FMIC EVO Comp!!

[horsepower_and_hounds]

Originally Posted by Tricki

Thx ,

Wagner FMIC EVO Comp!!

Seems that unit is very efficient.......

[Tricki]

Did a 100-200 log with times attached!!

https://datazap.me/u/mattspies/log-1...38;zoom=11-154

[Steveo]

Originally Posted by Bee Pee

A number of folk running mhd 2+ 102ron map here in the uk on 99ron wo issue and repeatedly more oomph everywhere than 98ron....

With what mods?

[Bee Pee]

Originally Posted by Steveo

With what mods?

Stevo

The usual stg2 bolt ons ie DP, CP and FMIC

BP

[M-Supra]

BM3 Race Gas Tune is the shizznizzle, fill up with 93 and add 1-32OZ can of Torco Accelerator for an octane rating of 103+

I've been running this tune for 5000+ miles, no issues, great logs.

398/466 at wheels, I'll post 100-200 times via Dragy soon.

PS2 next upgrade

[Tricki]

Originally Posted by M-Supra

BM3 Race Gas Tune is the shizznizzle, fill up with 93 and add 1-32OZ can of Torco Accelerator for an octane rating of 103+

I've been running this tune for 5000+ miles, no issues, great logs.

398/466 at wheels, I'll post 100-200 times via Dragy soon.

PS2 next upgrade

Would love to see one of your logs, and times.

[M-Supra]

Originally Posted by Tricki

Would love to see one of your logs, and times.

Here u go:

https://f87.bimmerpost.com/forums/sh....php?t=1506904

[ceedawg]

Originally Posted by M-Supra

BM3 Race Gas Tune is the shizznizzle, fill up with 93 and add 1-32OZ can of Torco Accelerator for an octane rating of 103+

I've been running this tune for 5000+ miles, no issues, great logs.

398/466 at wheels, I'll post 100-200 times via Dragy soon.

PS2 next upgrade

Im assuming you have just DP and FMIC correct?Nice numbers!

[FSociety]

Originally Posted by SeanWRT

You can damage your engine and make less power running RON100+ map on RON98 gas. Difference between RON100+ and 98 is huge.

Keep in mind High quality gas isn't high octane.

I can tell you 98RON don't even handle 98RON map well if you do back to back multiple gear pulls and/or IAT goes to triple digit which is normal. 100+ map would throw your ignition all over the place and even your butt dyno would tell car's running like shit.

Flash tune is no piggyback. There is no fixed boost target set with either bm3 or MHD, it all depends on IAT. MHD crack up boost as high as possible low down, while BM3 more and more tend to make flat torque plateau revision after revision. It's up to your taste.

You need to go either BM3 stg2 98 map or mhd 98 map (stg2 no plus).

+1

Originally Posted by M-Supra

BM3 Race Gas Tune is the shizznizzle, fill up with 93 and add 1-32OZ can of Torco Accelerator for an octane rating of 103+

I've been running this tune for 5000+ miles, no issues, great logs.

398/466 at wheels, I'll post 100-200 times via Dragy soon.

PS2 next upgrade

Cant wait to see your dragy time

Originally Posted by ceedawg

Im assuming you have just DP and FMIC correct?Nice numbers!

It says it in his link first post https://f87.bimmerpost.com/forums/sh....php?t=1506904

[ceedawg]

Originally Posted by FSociety

+1



Cant wait to see your dragy time


It says it in his link first post https://f87.bimmerpost.com/forums/sh....php?t=1506904

Thanks TROLL! REALLY!!

[bm3nyc]

We just flashed STG2 93oct OTS on a M2 customer