JB2, JB2R offroad downpipe dynos

Terry335 · 11-30-2007, 03:48 PM

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.

RiXst3r · 11-30-2007, 03:51 PM

lookin good

Bimmer335i07 · 11-30-2007, 03:52 PM

Wow!

Great #'s. lol!

Quick question Terry. When you say JB2R with the 93/octane pill. Do you mean that you have the JB2R swithced on and the octane pill with 93 octane?

bmwzimmer · 11-30-2007, 03:55 PM

Run 4 is the off the shelf JB2 (with 96 octane?)
Run 5 is the JB2 with the new downpipe/93 octane pill (96 octane?)
Run 3 is the JB2R with the new downpipe/93 octane pill (96 octane?)

Sorry, what is 93 octane pill?

Terry335 · 11-30-2007, 03:56 PM

Quote:

Originally Posted by bmwzimmer

Run 4 is the off the shelf JB2 (with 96 octane?)
Run 5 is the JB2 with the new downpipe/93 octane pill (96 octane?)
Run 3 is the JB2R with the new downpipe/93 octane pill (96 octane?)

Sorry, what is 93 octane pill?

Yes all runs 96 octane on drag radials. Was on the way to the track....The 93 pill is something I'm playing around with. I've used it in the past for customers who make less boost than they should (due to extra resistance in their map sensor, etc), but realized it works damn well as a DP/93 tune. More testing to come.

Terry335 · 11-30-2007, 03:58 PM

Quote:

Originally Posted by Bimmer335i07

Wow!

Great #'s. lol!

Quick question Terry. When you say JB2R with the 93/octane pill. Do you mean that you have the JB2R swithced on and the octane pill with 93 octane?

Yes, the 93 pill snaps in and can't be switched on/off. To avoid confusion we should call it the hot pill. So you can have a JB2, JB2H, JB2R, JB2RH (like this dyno).

musc · 11-30-2007, 03:59 PM

Very nice #s terry.

j|rz44 · 11-30-2007, 03:59 PM

wow 20 psi... that what you ran in that race the other day?
drag tires helps on a dyno?

GG nice numbahs

DrDomer · 11-30-2007, 03:59 PM

Quote:

Originally Posted by Terry335

Yes all runs 96 octane on drag tires @ 20psi. Was on the way to the track....The 93 pill is something I'm playing around with. I've used it in the past for customers who make less boost than they should (due to extra resistance in their map sensor, etc), but realized it works damn well as a DP/93 tune. More testing to come.

20 PSI!!!!!!!!!!!

Terry335 · 11-30-2007, 04:00 PM

Quote:

Originally Posted by DrDomer

20 PSI!!!!!!!!!!!

lol the tire pressure, no 20psi boost spikes with my hardware.

Nikolas · 11-30-2007, 04:01 PM

Those are some remarkably consistant curves between each run.

RiXst3r · 11-30-2007, 04:03 PM

Quote:

Originally Posted by Terry335

lol the tire pressure, no 20psi boost spikes with my hardware.

lol... you freaked me out with the 20psi thing too!

Ok... so what PSI is it running at?

Terry335 · 11-30-2007, 04:04 PM

Quote:

Originally Posted by RiXst3r

lol... you freaked me out with the 20psi thing too!

Ok... so what PSI is it running at?

lol changed it.

JB2 was ~11.25psi, JB2H ~11.75, JB2HR ~15. They all roll off towards redline.

e92phreak · 11-30-2007, 04:04 PM

Dang Terry... very impressive HP and torque #s!

11-30-2007, 04:12 PM

hmm i already have catless downpipes, so i wonder if i would get similar numbers with jbs2r

Bimmer335i07 · 11-30-2007, 04:14 PM

Quote:

Originally Posted by that guy nico

hmm i already have catless downpipes, so i wonder if i would get similar numbers with jbs2r

Don't forget the H, so it's JB2RH. lol!

A418t81 · 11-30-2007, 04:14 PM

You think us 93 octane + downpipe guys could get away with 12.2-ish psi?

Terry335 · 11-30-2007, 04:15 PM

Quote:

Originally Posted by A418t81

You think us 93 octane + downpipe guys could get away with 12.2-ish psi?

Maybe... but the problem is it might be OK when its colder out, but not when its hot, and the JB hardware can't adjust boost based on IAT. I need to leave some margin in there to allow for temperature variation.

11-30-2007, 04:16 PM

Quote:

Originally Posted by Bimmer335i07

Don't forget the H, so it's JB2RH. lol!

ABCDEFGHIJRBRBRBRBRBR2

musc · 11-30-2007, 04:22 PM

Quote:

Originally Posted by A418t81

You think us 93 octane + downpipe guys could get away with 12.2-ish psi?

12.5psi up to about 75-80 F ambient, beyond that some timing will be pulled. Sounds like the 'hot' pill is a nice in between. A winter version would be nice for those with 93oct and cooler temps. Could call it the JB2HW.

Terry335 · 11-30-2007, 04:23 PM

Quote:

Originally Posted by catm3

12.5psi up to about 75-80 F ambient, beyond that some timing will be pulled. Sounds like the 'hot' pill is a nice in between. A winter version would be nice for those with 93oct and cooler temps. Could call it the JB2HW.

Bimmer335i07 · 11-30-2007, 04:25 PM

Quote:

Originally Posted by Terry335

Maybe... but the problem is it might be OK when its colder out, but not when its hot, and the JB hardware can't adjust boost based on IAT. I need to leave some margin in there to allow for temperature variation.

Glad to see that you're looking out for everybody's best interest!

11-30-2007, 03:48 PM	#1
Terry335 Banned 112 Rep 2,587 Posts Drives: 335i Join Date: Jan 2007 Location: Socal iTrader: (0)	JB2, JB2R offroad downpipe dynos 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. Attached Images
	Appreciate 0 Tweet Quote

11-30-2007, 03:51 PM	#2
RiXst3r 327 Rep 6,510 Posts Drives: M235i Join Date: Sep 2006 Location: Ohio iTrader: (14)	lookin good
	Appreciate 0 Quote

11-30-2007, 03:52 PM	#3
Bimmer335i07 BK Employee of the month! / Moderator 747 Rep 15,795 Posts Drives: BMW 335i Sedan Join Date: Apr 2007 Location: ... iTrader: (9) Garage List 2007 335i [0.00]	Wow! Great #'s. lol! Quick question Terry. When you say JB2R with the 93/octane pill. Do you mean that you have the JB2R swithced on and the octane pill with 93 octane? __________________ Sponsored by: Pics of the ---> Barbera Beast <--- Martino Auto Concepts (Like them on Facebook MAC) Factory Trained & Authorized by BMW of North America Matt@Camber-Toe (Like them on Facebook Camber-Toe) LuxAngelEyes (Like them on Facebook LuxAngelEyes) LTBMW (Like them on Facebook LTBMW) OEMconcepts (Like them on Facebook OEMconcepts)
	Appreciate 0 Quote

11-30-2007, 03:55 PM	#4
bmwzimmer Major 45 Rep 1,084 Posts Drives: 335 Join Date: Jan 2007 Location: 91 octane states iTrader: (0)	Run 4 is the off the shelf JB2 (with 96 octane?) Run 5 is the JB2 with the new downpipe/93 octane pill (96 octane?) Run 3 is the JB2R with the new downpipe/93 octane pill (96 octane?) Sorry, what is 93 octane pill?
	Appreciate 0 Quote

11-30-2007, 03:59 PM	#7
musc Free T_e_r_r_Y :) 236 Rep 1,706 Posts Drives: X3MC, Audi TTRS MK3, 335is DCT Join Date: Dec 2006 Location: Charleston, SC iTrader: (9) Garage List 2023 BMW X3MC [10.00] 2011 BMW 335is [10.00]	Very nice #s terry.
	Appreciate 0 Quote

11-30-2007, 03:59 PM	#8
j\|rz44 Lieutenant Colonel 48 Rep 1,683 Posts Drives: 335i\|E92 Join Date: Oct 2006 Location: Lost iTrader: (2) Garage List 07 335i [0.00]	wow 20 psi... that what you ran in that race the other day? drag tires helps on a dyno? GG nice numbahs __________________ Life is Good
	Appreciate 0 Quote

11-30-2007, 04:01 PM	#11
Nikolas Colonel 313 Rep 2,576 Posts Drives: 996 TT Join Date: Jul 2007 Location: Sierra Mountains iTrader: (0)	Those are some remarkably consistant curves between each run.
	Appreciate 0 Quote

11-30-2007, 04:04 PM	#14
e92phreak General 398 Rep 21,745 Posts Drives: E92 335i TiAg/E46 323i TiAg Join Date: Mar 2007 Location: CA iTrader: (1) Garage List 2007 E92 335i [9.50] 2000 E46 323i [0.00]	Dang Terry... very impressive HP and torque #s! __________________ 07 E92 335i \| TiAg \| Step \| Padl \| Cmft \| Alum Trm \| PDC \| Nav \| Assist \| Sat \| Lthr \| Prem \| Sprt \| Rear Splr \| RDSport Quads \| iPod \| V1 \| LT Refl \| VS Clear Bra \| OEM Lip \| KWV2 \| Mtec Sides \| BBS LM-R 00 E46 323i \| TiAg \| 5sp \| Sport \| Roof \| RDSport Cams \| RDSport tune \| RDSport Shift \| Volk LE37 \| M3 spoiler \| PSS9 \| SuperSprint \| Brembo
	Appreciate 0 Quote

11-30-2007, 04:12 PM	#15
nico335 Guest 0 Rep n/a Posts Drives:	hmm i already have catless downpipes, so i wonder if i would get similar numbers with jbs2r
	Appreciate 0 Quote

11-30-2007, 04:14 PM	#17
A418t81 Lieutenant Colonel 438 Rep 1,553 Posts Drives: Ever changing fleet Join Date: May 2007 Location: Alabama iTrader: (1) Garage List 2013 335is [0.00]	You think us 93 octane + downpipe guys could get away with 12.2-ish psi? __________________ 23 IOMG G80 CX, 23 iX M60, 24 GT3RS PTS Weissach, 23 296 GTB, 24 Cybertruck
	Appreciate 0 Quote