09-23-2020, 07:47 AM | #45 |
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I'm sure that is true but a 5 or 6 lb boost increase over stock with the additive Maps 1 or 2 should be huge. That is a fairly significant increase with a big bump in tq.
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09-23-2020, 09:53 AM | #46 |
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It all depends if there is no timing retard. Boost is great but there is a lot more to tuning a vehicle than jacking up the boost.
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09-23-2020, 10:39 AM | #47 | |
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Map 2 is best set up if you are stock, map 3 maxes you at 18psi and map 5 maxes you at 20psi Map 2 I'm hitting 22psi
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09-23-2020, 12:35 PM | #48 | |
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Why are you getting 4 psi more though? Does he feel hitting 22 psi is safe with no other supporting mods? Last edited by 130FeetDeep; 09-23-2020 at 12:50 PM.. |
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09-23-2020, 02:20 PM | #49 |
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Thank You, I am very well aware of that. These piggy back devices are far from "tuning a vehicle". Adding this amount of boost while logging afrs where I see the in these logs is asking for a problem and not worth it.
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09-23-2020, 02:38 PM | #50 | |
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Just know a flash is an insta-void on your warranty. It isn't a maybe anymore with the new ISTA, it is gone. Anytime your SA plugs into your car, this data is now uploaded to BMW so your warranty is gone. That means piggies are your only choice if you want to retain your powertrain warranty. |
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09-23-2020, 03:24 PM | #51 | |
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I read through a few threads about JB4s on another forum and some of the guys claim to have some serious SOTP improvements in M5s and M550is. How much boost do you think these motors can handle and stay in one piece for say 50,000 miles? My prior experience is with supercharged Ford V8s with Zoeler forged pistons, forged crankshafts, Manley 4340 rods. Going from 8 lbs to say 14 on those 4.6L motors was a profound increase in performance as in going from 13 second 1/4 miles to mid 11s. I'm nowhere near the break in point on my '21 M50i and have not run it anywhere near redline but am seriously impressed with the stock power and that is here in the SW FL severe heat and very high humidity none of which are favorable to FI engines. |
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09-23-2020, 03:52 PM | #52 | |
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My only concern is the timing drops showing up in Tim's logs. I also am not sure why he is seeing 22 lbs of boost when the map he is running should only target 18? |
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09-23-2020, 06:12 PM | #53 | |
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09-23-2020, 06:28 PM | #54 | ||
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This is day 3 of running map 2 and it pulls like a train on the highway, that is where I see majority of the improvement. Overall I'm happy with the set up and think it's worth the money and only 45 min install. Another positive is that it's a piggy back so you won't get flagged when you go into service which Is major.
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09-23-2020, 06:57 PM | #55 | |||
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I'm just concerned that my stock brake boost time vs the one you had with JB4 are very similar. Albeit you had a full tank and I had 1/4 tank. I tried a burger tune (piggyback) on my '16 F15 50i. It actually made it slower. |
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09-23-2020, 07:05 PM | #56 | ||||
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09-23-2020, 07:08 PM | #57 | |||||
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09-23-2020, 07:11 PM | #58 | ||||||
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There's usually a nice stretch of road on my way home so I'll see if I can get some times in
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09-23-2020, 07:56 PM | #59 | |
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09-24-2020, 07:20 AM | #60 | |
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This is really a great forum! Last edited by speedyman; 09-24-2020 at 07:27 AM.. |
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09-24-2020, 07:23 AM | #61 |
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09-24-2020, 08:03 AM | #62 |
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You still feel the difference in city driving just not as much as highway, on the highway it pulls like a train
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09-24-2020, 02:22 PM | #63 | |
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I can't tell from the pics of the install instructions, are the TMAP sensor connections on the grill or firewall side of the intercoolers? I think I can see the TMAP sensor on the grill side of the intercooler on passenger side but can't make it out on the driver side intercooler. I didn't remove the brace or plastic ducting as of yet. |
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09-24-2020, 04:42 PM | #64 | ||||
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This is on map 2
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09-24-2020, 06:48 PM | #65 |
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Awesome!
How did it feel? I mean, did it still feel like it was pulling hard? I am going to run some stock ones this weekend. |
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09-24-2020, 07:12 PM | #66 |
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It was Deff still pulling hard around the 110 mark but had to slow down for traffic, it will easily do 130+ no issues
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