[Utvolman99]

Okay guys, I'm sure this topic has been beaten to death but my search is inconclusive or brings up old threads from when there wasn't that much info about the N20.

I currently am stock with a JB4 on Map 1 (I'm assuming this would be considered Stage I). How at risk would my engine be in with a downpipe and Map 2, with 93 octane (I'm assuming this is "Stage II").

I know there are a lot of folks running this setup with no issues. However, I have read where a couple of folks lost their engine with similar setups.

[BunkerJ]

Originally Posted by Utvolman99

Okay guys, I'm sure this topic has been beaten to death but my search is inconclusive or brings up old threads from when there wasn't that much info about the N20.

I currently am stock with a JB4 on Map 1 (I'm assuming this would be considered Stage I). How at risk would my engine be in with a downpipe and Map 2, with 93 octane (I'm assuming this is "Stage II").

I know there are a lot of folks running this setup with no issues. However, I have read where a couple of folks lost their engine with similar setups.

With a flash tune, you'll be perfectly safe. Been running "Stage 2" for quite some time. Now, what you're referencing in terms of bricked engines running JB4 has to do with AFR. Some people would run JB4 without the supporting mods or part of the system not performing to standards, which leaned out the engine and bricked it. JB4 is safe so long as you have the supporting mods and monitor it, especially in the beginning. Ensure you are not running lean and you'll be fine.

[nemobanks]

Originally Posted by BunkerJ

With a flash tune, you'll be perfectly safe. Been running "Stage 2" for quite some time. Now, what you're referencing in terms of bricked engines running JB4 has to do with AFR. Some people would run JB4 without the supporting mods or part of the system not performing to standards, which leaned out the engine and bricked it. JB4 is safe so long as you have the supporting mods and monitor it, especially in the beginning. Ensure you are not running lean and you'll be fine.

That Part. I remember when I was running Jb4 It felt as if i was living on the edge, it was so stressful lol . I became a tuner within months.

[BunkerJ]

Originally Posted by nemobanks

That Part. I remember when I was running Jb4 It felt as if i was living on the edge, it was so stressful lol . I became a tuner within months.

JB4 can be great, but can really mess up your car if not everything is working together well. At least with a tune, you can find that out during the process and adjust accordingly, or make changes to a safer range.

[blakep8]

Originally Posted by BunkerJ

With a flash tune, you'll be perfectly safe. Been running "Stage 2" for quite some time. Now, what you're referencing in terms of bricked engines running JB4 has to do with AFR. Some people would run JB4 without the supporting mods or part of the system not performing to standards, which leaned out the engine and bricked it. JB4 is safe so long as you have the supporting mods and monitor it, especially in the beginning. Ensure you are not running lean and you'll be fine.

How many miles have you ran your stage 2?

[BunkerJ]

Originally Posted by blakep8

How many miles have you ran your stage 2?

20k+

[David328M-Sport]

I have a JB4 + catless dp on my 328i for some years and run it on map2. No issues - ever. Just loads, and I mean LOADS of fun with extremely fast acceleration in sport & ds mode. We have 98RON fuel here in Australia, so I get the most out of the car.

Got used to pseudo launch control (as the 328i doesn't have an official lc) and the car really takes of from standing start. Love it.

[BunkerJ]

Originally Posted by David328M-Sport

I have a JB4 + catless dp on my 328i for some years and run it on map2. No issues - ever. Just loads, and I mean LOADS of fun with extremely fast acceleration in sport & ds mode. We have 98RON fuel here in Australia, so I get the most out of the car.

Got used to pseudo launch control (as the 328i doesn't have an official lc) and the car really takes of from standing start. Love it.

Good to hear. JB4 is a nifty tool for what it is. Some people didn't use it right and bricked their engine, so it scared a few people. Use it with the right mods in the right map and you're good. It does tend to run a little more lean, but that might be dependent on fuel. That being said, flash tunes are readily available and much better to buy rather than a piggyback.

[mike@x-ph.com]

As long as you running the suggested maps and mods, you are as safe as you can be.

Most of the problems i have seen were due to customers going with maps that are too aggressive for their mods.

[Utvolman99]

Originally Posted by mike@x-ph.com

As long as you running the suggested maps and mods, you are as safe as you can be.

Most of the problems i have seen were due to customers going with maps that are too aggressive for their mods.

So, I'm planning a catless downpipe, stock exhaust and an intake. From what I've read those are "proper mods" for the JB4 map II?

[BunkerJ]

Originally Posted by Utvolman99

So, I'm planning a catless downpipe, stock exhaust and an intake. From what I've read those are "proper mods" for the JB4 map II?

Not a JB4 user, but high flow DP and FMIC are the recommended mods for a stage II application.

[Utvolman99]

Originally Posted by BunkerJ

Not a JB4 user, but high flow DP and FMIC are the recommended mods for a stage II application.

Never head the intercooler for JB4 map2. I need to research more as I read somewhere the N20 has the same intercooler as the N54. If that's the case, I would assume the stock cooler would have some room.

[BunkerJ]

Originally Posted by Utvolman99

Never head the intercooler for JB4 map2. I need to research more as I read somewhere the N20 has the same intercooler as the N54. If that's the case, I would assume the stock cooler would have some room.

Stock cooler isn't too great. Again, stage II applications recommend DP and FMIC upgrades.

[drivef30]

key word is "recommended" you dont HAVE to per say, but you will loose performance if you demand too much from the car without a FMIC.

[BunkerJ]

Originally Posted by drivef30

key word is "recommended" you dont HAVE to per say, but you will loose performance if you demand too much from the car without a FMIC.

Of course you don't have to. I remember some of those guys saying that before they came back to the forums with a bricked engine.

[mike@x-ph.com]

Originally Posted by Utvolman99

So, I'm planning a catless downpipe, stock exhaust and an intake. From what I've read those are "proper mods" for the JB4 map II?

Originally Posted by BunkerJ

Not a JB4 user, but high flow DP and FMIC are the recommended mods for a stage II application.

Originally Posted by Utvolman99

Never head the intercooler for JB4 map2. I need to research more as I read somewhere the N20 has the same intercooler as the N54. If that's the case, I would assume the stock cooler would have some room.

Yes you can run stage 2 with the mod you plan on getting.

It is strongly recommended that you upgrade the intercooler as well.
Stock intercooler cannot keep up with the additional boost and ECU will pull ignition timing causing very noticeable loss in power.

[madmortar]

Ask this in another few threads but

Are there difference what bolt ons you need for stage 2 tunes between N20 and N26?

Wondering for people that have N26 and went stage two...would assume you HAVE to replace mid-pipe as it has extra cat in addition to aftermarket downpipe vs. N20 where you can just get a downpipe and go.

[BunkerJ]

Originally Posted by madmortar

Ask this in another few threads but

Are there difference what bolt ons you need for stage 2 tunes between N20 and N26?

Wondering for people that have N26 and went stage two...would assume you HAVE to replace mid-pipe as it has extra cat in addition to aftermarket downpipe vs. N20 where you can just get a downpipe and go.

Copied from my other response. Mike from XPH also responded in another thread.

"No difference between the two engines. Only difference is PWG vs. EWG, which should be released soon. As for the midpipe, the second cat is not very restrictive, so you don't have to. I did replace mine with the AWE midpipe in order to get the resonator."

[madmortar]

Thanks!

[fate_f30]

Originally Posted by BunkerJ

JB4 can be great, but can really mess up your car if not everything is working together well. At least with a tune, you can find that out during the process and adjust accordingly, or make changes to a safer range.

When you upgraded your turbo and fuel pump who custom tuned your new set up? PTF? The only reason I ask is I'm considering doing those upgrades really soon and I just want to get an idea of who tuned your car after the switch.

[rjd_F30]

Originally Posted by fate_f30

When you upgraded your turbo and fuel pump who custom tuned your new set up? PTF? The only reason I ask is I'm considering doing those upgrades really soon and I just want to get an idea of who tuned your car after the switch.

Just gonna jump in because I haven't seen Bunker on here in a while lol. As far as I know he's running the OTS stg. 2 BM3 map with the bigger turbo and fuel pump. It's perfectly fine to run OTS with a bigger turbo like MHI or Dinan, because they're really not all that big. Same goes for the fuel pump. It will run perfectly on an OTS map, the only reason it's upgraded is to handle the demands of ethanol as far as I know.

[fate_f30]

Originally Posted by rjdnyy224

Just gonna jump in because I haven't seen Bunker on here in a while lol. As far as I know he's running the OTS stg. 2 BM3 map with the bigger turbo and fuel pump. It's perfectly fine to run OTS with a bigger turbo like MHI or Dinan, because they're really not all that big. Same goes for the fuel pump. It will run perfectly on an OTS map, the only reason it's upgraded is to handle the demands of ethanol as far as I know.

Thanks for jumping in. You did the larger MHI turbo but not the fuel pump upgrade. Correct?