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      10-28-2019, 03:42 PM   #1
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New personal best 1/4 mile in 2020 M5 Comp

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These are great numbers and more impressive still, they're achieved on pump gas with a JB4 and BMC air filters representing the only performance mods and I hit them on a farm road, not a track with a prep'd surface. I'd guess that's another 1/10th or 2 in there from increased traction and a general lack of flight.
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      10-28-2019, 03:46 PM   #2
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Very Nice!! Which map on JB4?
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      10-28-2019, 03:51 PM   #3
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Quote:
Originally Posted by ss_m5 View Post
Very Nice!! Which map on JB4?
Map 6 at 5 and 5.5psi.

Note that map 6 doesn't work on 2020 Comps with released firmware; Terry's addressed most of the problems but I don't think he's ready to release that firmware yet—that's obviously his call to decide when it's good enough.

// edited boost per rpm values above since I think I'd tinkered again before that run.
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      10-28-2019, 05:11 PM   #4
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This is whatís so confusing about JB4. I thought anything above Map1 requires race fuel. This is how they explained it to me over email.
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      10-28-2019, 05:37 PM   #5
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Quote:
Originally Posted by ss_m5 View Post
This is what’s so confusing about JB4. I thought anything above Map1 requires race fuel. This is how they explained it to me over email.
I'll start by saying they're the experts, not me.

That said, I originally followed those same guidelines for... years I'd guess. During that time, I'd been (unintentionally) studying and had learned a lot from build and tuning threads where folks experimented in small increments and posted their results. Eventually, I started experimenting myself--in even smaller increments--and figured out what worked on what cars and on what fuel. 92 octane is what I have available so I tried map 2 with a reputable octane booster (Klotz is the brand I use). Map 2 states it requires 93 so just a small amount of octane booster got me to a point where I was comfortable to try--it worked well enough on my earlier M5s and M6s. Aside: it doesn't work well on the F90 Comp edition, map 1 is better... there's also a lesson in there.

I started logging to see what boost targets the car was requesting and things progressed from there.

Another disclaimer: I'm increasing boost targets by 0.5 at a time relative to what the car is requesting across the RPM range. Then I log for miles and miles and days on end sometimes steadily pushing the targets further. If I feel something 'off', I revert immediately and typically call it a day concluding I've hit the ceiling. Getting this stuff wrong can quite literally destroy your engine. That's a risk I'm obviously prepared to take but it's a very real risk--the evidence exists on the very same posts I mentioned earlier and on this very forum.

Map 6 isn't as cut-and-dry as map 1 or map 2 because it requires you enter boost values (I'm deliberately not saying targets here) per RPM increment plus its very behavior changes depending upon what you enter for the 1500rpm boost value--so yet more risk.

Just like the OEM, aftermarket vendors leave room for a margin of error. BMW's OEM margin is clearly gigantic; Dinan's, to me, barely pushes the envelope; the JB4 on map 1 strikes a nice balance--anywhere beyond that and you're squarely in the 'taking a risk' & 'on your own' category; the latter part being what I would expect to happen in some hypothetical nightmare situation, not what I know to be true through experience.

I'm not suggesting you follow my lead, this only explains how I 1) got to a possibly naÔve point where I'm comfortable to tinker and 2) how I got the times I got today.
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      10-28-2019, 05:47 PM   #6
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Great results man! Really good work on figuring it out, and nice write-up as well. What are you getting 60-130mph on this kind of run?
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      10-28-2019, 06:07 PM   #7
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Quote:
Originally Posted by FloridaM5 View Post
Great results man! Really good work on figuring it out, and nice write-up as well. What are you getting 60-130mph on this kind of run?
60-130 was 7.28s--not great. I got a 6.75s in my '19 on a lesser map but could never combine it with a reliable launch and certainly not on this stretch of road. So far, that's not a problem for this M5... I've no idea what changed but I like it.

This particular road is literally as I describe it, it's a desolate farm road where I risk me and some corn... a lot of corn actually but mostly me. The undulations make the car light 4 or 5 times over the distance--it's disconcerting to say the least--but sphincter-clenching moments aside, that has a horrible impact on the 60-130 time because the length of each 'flight' (shall we say) gets longer the faster I go reducing forward propulsion.

It's fair to say this car needs to see a dragstrip and soon...
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      10-28-2019, 06:29 PM   #8
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Quote:
Originally Posted by limeypride View Post

60-130 was 7.28s--not great. I got a 6.75s in my '19 on a lesser map but could never combine it with a reliable launch and certainly not on this stretch of road. So far, that's not a problem for this M5... I've no idea what changed but I like it.

This particular road is literally as I describe it, it's a desolate farm road where I risk me and some corn... a lot of corn actually but mostly me. The undulations make the car light 4 or 5 times over the distance--it's disconcerting to say the least--but sphincter-clenching moments aside, that has a horrible impact on the 60-130 time because the length of each 'flight' (shall we say) gets longer the faster I go reducing forward propulsion.

It's fair to say this car needs to see a dragstrip and soon...
Ah nice. Yeah, would be very cool to see how it performs on a track for you...no corn and no jumps. Even now, crazy good results. On this run, your 1/8 mile is ridiculous; if you were on a track with no jumps, the back half of the track would've been ridiculous too. Low 10second car....so strong.
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      10-28-2019, 06:54 PM   #9
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Quote:
Originally Posted by FloridaM5 View Post
Ah nice. Yeah, would be very cool to see how it performs on a track for you...no corn and no jumps. Even now, crazy good results. On this run, your 1/8 mile is ridiculous; if you were on a track with no jumps, the back half of the track would've been ridiculous too. Low 10second car....so strong.
Assuming Dragy is as reliable we all hope it to be, yes--agreed!
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      10-28-2019, 07:32 PM   #10
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That's flying for just a JB4 basically. How much can the 60' time improve though? I don't know if it would be much better on a track. Maybe a 10.2. Is pump gas 93?
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      10-28-2019, 07:54 PM   #11
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Quote:
Originally Posted by limeypride View Post
I'll start by saying they're the experts, not me.

That said, I originally followed those same guidelines for... years I'd guess. During that time, I'd been (unintentionally) studying and had learned a lot from build and tuning threads where folks experimented in small increments and posted their results. Eventually, I started experimenting myself--in even smaller increments--and figured out what worked on what cars and on what fuel. 92 octane is what I have available so I tried map 2 with a reputable octane booster (Klotz is the brand I use). Map 2 states it requires 93 so just a small amount of octane booster got me to a point where I was comfortable to try--it worked well enough on my earlier M5s and M6s. Aside: it doesn't work well on the F90 Comp edition, map 1 is better... there's also a lesson in there.

I started logging to see what boost targets the car was requesting and things progressed from there.

Another disclaimer: I'm increasing boost targets by 0.5 at a time relative to what the car is requesting across the RPM range. Then I log for miles and miles and days on end sometimes steadily pushing the targets further. If I feel something 'off', I revert immediately and typically call it a day concluding I've hit the ceiling. Getting this stuff wrong can quite literally destroy your engine. That's a risk I'm obviously prepared to take but it's a very real risk--the evidence exists on the very same posts I mentioned earlier and on this very forum.

Map 6 isn't as cut-and-dry as map 1 or map 2 because it requires you enter boost values (I'm deliberately not saying targets here) per RPM increment plus its very behavior changes depending upon what you enter for the 1500rpm boost value--so yet more risk.

Just like the OEM, aftermarket vendors leave room for a margin of error. BMW's OEM margin is clearly gigantic; Dinan's, to me, barely pushes the envelope; the JB4 on map 1 strikes a nice balance--anywhere beyond that and you're squarely in the 'taking a risk' & 'on your own' category; the latter part being what I would expect to happen in some hypothetical nightmare situation, not what I know to be true through experience.

I'm not suggesting you follow my lead, this only explains how I 1) got to a possibly naÔve point where I'm comfortable to tinker and 2) how I got the times I got today.
Great results, I appreciate the clarification. You obviously know what you're doing. That's very cool I wish I had the time to tinker around. I need something I can set and forget but also feel some real power gains. I have the RC and it's definitely giving you some power but
it's not like wow now I feel the power. I've never liked piggy's but they seem to work well on this platform.
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      10-28-2019, 08:03 PM   #12
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Quote:
Originally Posted by gpdriver17 View Post
That's flying for just a JB4 basically. How much can the 60' time improve though? I don't know if it would be much better on a track. Maybe a 10.2. Is pump gas 93?
Agreed.

The 60ft isn't my concern, the brief flights from there onwards are. I don't know what it would equate to but surely not leaving-the-ground 5 times or so would be a good thing for trap speed and hence ET.
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      10-28-2019, 08:09 PM   #13
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Quote:
Originally Posted by ss_m5 View Post
Great results, I appreciate the clarification. You obviously know what you're doing. That's very cool I wish I had the time to tinker around. I need something I can set and forget but also feel some real power gains. I have the RC and it's definitely giving you some power but
it's not like wow now I feel the power. I've never liked piggy's but they seem to work well on this platform.
Understood--I think you represent the vast majority.

It's a contentious topic and, given that I've not tried the RC, I'm ill-informed. That said, my map 1 experience on JB4 led to a 10.6 in the 1/4 on this same car. I don't know if the RC can deliver that.

The install for the JB4 is similar to the RC because they manipulate performance in a similar way. The JB4 also takes control of the wastegates (if you want it to; not required) giving it yet more control. The app used to control it is excellent and can log almost every conceivable statistic: it can view and clear codes; it can switch maps on-the-fly and, as we've already discussed, configure the behavior of those maps if you're willing to tinker.

Short story: I'd recommend giving it a shot if the money factor isn't a major concern.

Last edited by limeypride; 10-28-2019 at 08:16 PM..
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      10-28-2019, 10:15 PM   #14
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Quote:
Originally Posted by limeypride View Post
60-130 was 7.28s--not great. I got a 6.75s in my '19 on a lesser map but could never combine it with a reliable launch and certainly not on this stretch of road. So far, that's not a problem for this M5... I've no idea what changed but I like it.

This particular road is literally as I describe it, it's a desolate farm road where I risk me and some corn... a lot of corn actually but mostly me. The undulations make the car light 4 or 5 times over the distance--it's disconcerting to say the least--but sphincter-clenching moments aside, that has a horrible impact on the 60-130 time because the length of each 'flight' (shall we say) gets longer the faster I go reducing forward propulsion.

It's fair to say this car needs to see a dragstrip and soon...
Unreal times! Congrats Limey! Have you tried your suspension on comfort to help absorb those bumps?
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DME: 1848 DA 0-60 2.42 -- 1/8 Mile 6.38 -- 1/4 Mile 9.89 -- 60-130 5.91
Evolve: 1418 DA 0-60 2.48 -- 1/8 Mile 6.47 -- 1/4 Mile 10.05 -- 60-130 6.48
JB4: 1096 DA 0-60 2.54 -- 1/8 Mile 6.50 -- 1/4 Mile 10.05 -- 60-130 6.18
IG: @hockeytyme All runs on street with no prep on 21 inch wheels and PS4S tires
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      10-28-2019, 10:58 PM   #15
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Unreal times! Congrats Limey! Have you tried your suspension on comfort to help absorb those bumps?
It's always on Comfort for runs. It sits better on its haunches and absorbs the power that would often otherwise result in hop. I only change the suspension for road courses or regular twisties.
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      10-29-2019, 03:53 AM   #16
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Those are some very impressive times for just a JB4. Congrats!
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      10-29-2019, 07:10 AM   #17
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Quote:
Originally Posted by limeypride View Post
It's always on Comfort for runs. It sits better on its haunches and absorbs the power that would often otherwise result in hop. I only change the suspension for road courses or regular twisties.
This is interesting I donít think my car has ever experienced comfort. Iím in sport+ 100% of the time. Iíll need to give this a try.
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      10-30-2019, 08:54 AM   #18
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great results man!

care to share your map 6 set up?
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      10-30-2019, 09:22 AM   #19
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That 60' time is unreal. What tires are you running? 275/35 & 285/35 PS4S?

I might run R888R in 285/35 & 305/35 since my M5 won't be my daily. Or I will run PS4S 285/35 & 295/35 if I end up hating the R888R.
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      10-30-2019, 09:56 AM   #20
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Quote:
Originally Posted by gtenedio View Post
great results man!

care to share your map 6 set up?
Sure. 5 psi from 1500 rpm through 3000. Then 5.5 through 6000 rpm and 5 psi at 6500 and 7000 rpm.

Again note: the stock JB4 firmware doesn't work on 2020 M5 Comps (possibly non Comps, too, I don't know for sure on that one). This run was on firmware I got from Terry in an effort to fix what he referred to as changes to boost targeting in 2020 models.

Note also: I'm still not convinced that 5.5 feels quite right without octane booster—still tinkering—so I may lower my daily to 5 flat or just get used to adding 20oz per tank.
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      10-30-2019, 09:56 AM   #21
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Dean I didnt check all the posts but what is your octane? I wonder what your exact map on my shitbox 91 would yield with probably less optimal conditions here in CA?

Oh nice numbers Mister.
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      10-30-2019, 10:02 AM   #22
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Quote:
Originally Posted by apsuard View Post
That 60' time is unreal. What tires are you running? 275/35 & 285/35 PS4S?

I might run R888R in 285/35 & 305/35 since my M5 won't be my daily. Or I will run PS4S 285/35 & 295/35 if I end up hating the R888R.
Pilot Sport 4S at 285/30/20 front and 295/30/20 rear. 37psi (in ~50f) all round.
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