[Insider]

Originally Posted by Terry335

Hey guys,

I was planning on breaking in to the 11s all turbo today, but the weather just didn't want to cooperate. Since I was already dressed up, I decided to swing by the dyno on the way back.

Mods are JB, UR offroad downpipes, 2nd cats & res removed, cutouts, and ITG air filter. All runs were on ~96 octane. Correction factor 1-2%.

Run 4 is the off the shelf JB2
Run 5 is the JB2 with the new downpipe/93 octane pill
Run 3 is the JB2R with the new downpipe/93 octane pill

Overall I was pretty happy with the numbers. I also did a run closed cutouts (stock muffler), and peak hp/tq was around 8 less.

To do a quick analysis on the downpipes, I did around 323rwhp before on the JB2 91 octane, stock downpipes, stock mufflers. So I *think* the downpipes were worth around 10rwhp/15rwtq on the normal JB2. Not bad at all! Spool is much better, and the sound is a bit more tinny but not bad. Overall they are a high quality product and do perform. I don't really want to get in to a downpipe war but will be testing the Riss downpipes soon as well.

The downpipe/93 pill adds around .5psi, and produced a nice gain. On the JB2R + .5psi the torque really took off, maybe too much for daily driving, but makes for a fun track curve. Not *too* lumpy...

Anyway enjoy.

I thought downpipes were supposed to add around 25 WHP?

[DrewKo]

Originally Posted by Terry335

The ECU manages the timing curve based on IAT just like it does stock, unless the "R" switch is on. Which maxes out the ECU timing pull.

Terry, if the R switch maxes out the ECU timing pull, does that mean there is no safety margin aside from going to limp mode?

[E90 335i]

FTW

[e90AW335i]

Originally Posted by E90 335i

FTW

+1

[Terry335]

Originally Posted by DrewKo

Terry, if the R switch maxes out the ECU timing pull, does that mean there is no safety margin aside from going to limp mode?

No, you still have your normal ~8 degrees before limp. So with the IAT at ~70 over ambient (depending on ambient) you get ~10 degrees before limp. If you were to turn the R switch on with say 93 octane you would drop ~5 degrees, or ~8 degrees on 91, so you'd only have 2-5 degrees left before limp code. With 96 octane there is no drop at all (aside from initial 2 degrees from the IAT).

Confused yet?

Wait a minute, you're not a JB2 customer. What do you care?

[DrewKo]

Originally Posted by Terry335

No, you still have your normal ~8 degrees before limp. So with the IAT at ~70 over ambient (depending on ambient) you get ~10 degrees before limp. If you were to turn the R switch on with say 93 octane you would drop ~5 degrees, or ~8 degrees on 91, so you'd only have 2-5 degrees left before limp code. With 96 octane there is no drop at all (aside from initial 2 degrees from the IAT).

Confused yet?

Wait a minute, you're not a JB2 customer. What do you care?

---Ok, I understand...makes sense....just learning!!! This is great, free education in f/i.

[e90AW335i]

Originally Posted by Terry335

No, you still have your normal ~8 degrees before limp. So with the IAT at ~70 over ambient (depending on ambient) you get ~10 degrees before limp. If you were to turn the R switch on with say 93 octane you would drop ~5 degrees, or ~8 degrees on 91, so you'd only have 2-5 degrees left before limp code. With 96 octane there is no drop at all (aside from initial 2 degrees from the IAT).

Confused yet?

Wait a minute, you're not a JB2 customer. What do you care?

He is just looking for flaws......

[Terry335]

Originally Posted by DrewKo

---Ok, I understand...makes sense....just learning!!! This is great, free education in f/i.

Keep in mind this is all very 335i specific....

so what psi are the turbos running at with the jb2r and 93 octane pil?

[Terry335]

Originally Posted by that guy nico

so what psi are the turbos running at with the jb2r and 93 octane pil?

I was getting ~14.5psi, but if you look at JonM's recent dyno, he got around 14psi. Another customer with an xi just posted a dyno without the pill and got around 13.2psi.

[radgator1]

Hey Terry, I'm loving the JB2!!

Haven't gotten to install the R switch yet because I was out of town until this week. Can you point me to a thread that explains the "pill". Is it an add-on to the JB2 or is it a stand alone unit and can it be used with the R switch?

Thanks

[Terry335]

Originally Posted by radgator1

Hey Terry, I'm loving the JB2!!

Haven't gotten to install the R switch yet because I was out of town until this week. Can you point me to a thread that explains the "pill". Is it an add-on to the JB2 or is it a stand alone unit and can it be used with the R switch?

Thanks

The pill is just something I'm playing around with that adds .5-.75psi boost, but I'm not sure about it yet. On 93 octane in cooler temps it seems to work really well, but need to test 93 octane on hotter temps. On 91 octane I think its going to be a no-go even with exhaust/downpipes, but need more testing.

Originally Posted by Terry335

I was getting ~14.5psi, but if you look at JonM's recent dyno, he got around 14psi. Another customer with an xi just posted a dyno without the pill and got around 13.2psi.

very very tempting

[silvrevo]

What about people with 92 octane,,,, BP gas.

That might be a nice inbetween spot , when one dosnt want to spend the extra mula, and time getting race gas.

Have you had people try it on 92 yet Terry,, the pill that is?

And also if you want to disclose,,,,, have you ever tested the minimal octane rating for using your jb2r? I know your saying 96 octane.

Maybe just to see where the bottom is,,,,, and actually what happens, cel , limp, ect.

thanks.

[Terry335]

Originally Posted by silvrevo

What about people with 92 octane,,,, BP gas.

That might be a nice inbetween spot , when one dosnt want to spend the extra mula, and time getting race gas.

Have you had people try it on 92 yet Terry,, the pill that is?

And also if you want to disclose,,,,, have you ever tested the minimal octane rating for using your jb2r? I know your saying 96 octane.

Maybe just to see where the bottom is,,,,, and actually what happens, cel , limp, ect.

thanks.

Oh yeah I've done a ton of testing. The R will throw a code on 91 on hot days, not on cooler days, but I don't suggest it at all. Why risk it. The pill stock exhaust on 91 doesn't work on hotter days, but I think it will on 93. 92 is probably not going to work.

[silvrevo]

cool beans.

[Bimmer335i07]

Originally Posted by Terry335

Oh yeah I've done a ton of testing. The R will throw a code on 91 on hot days, not on cooler days, but I don't suggest it at all. Why risk it. The pill stock exhaust on 91 doesn't work on hotter days, but I think it will on 93. 92 is probably not going to work.

So, are you saying that I can run the "R" switch with 93 octane? Our temps these past few days are between 25-40 degrees. If so, I'm turning the switch back on. lol! I miss the POWER!!!

[Terry335]

Originally Posted by Bimmer335i07

So, are you saying that I can run the "R" switch with 93 octane? Our temps these past few days are between 25-40 degrees. If so, I'm turning the switch back on. lol! I miss the POWER!!!

I'm not saying that, but I can't stop you from trying.

[Bimmer335i07]

Originally Posted by Terry335

I'm not saying that, but I can't stop you from trying.

What's the worst that can happen???

Limp mode, then turn the switch off, restart my car to get rid of the limp mode?

[e90AW335i]

Originally Posted by Terry335

I'm not saying that, but I can't stop you from trying.

Its called liability boys.....

[Terry335]

Originally Posted by Bimmer335i07

What's the worst that can happen???

You have to pull over and pickup pieces of the engine that got left on the highway. But most likely it will work as long as temps are below 50, and most likely worse case scenario if it doesn't work is a limp code. I just have to scare you like that for liability purposes.

[e90AW335i]

Originally Posted by Terry335

I just have to scare you like that for liability purposes.

Whats your company registered as? LLP, LLC?