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      08-25-2010, 09:26 AM   #1
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JB+ review and questions

Its been about a week and a half since I installed the JB+ on my car.

I have it set at 50% and am quite pelase so far. I am running Sheel V-Power with 91 octane. It seems that at about 3,000 rpm the engine really comes alive a lot more than it did. Very smooth from that point on. I have yet to red line (highest was 1000 rpm below it) the car since I have owned it but it seems a lot easier to get to that point.

I will probably crank up the JB+ a bit more in the near future.

Quick question: Will using 94 octane make a noticeable difference at the 50% setting? What about at the 65 - 75% setting?
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      08-25-2010, 10:25 AM   #2
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Quote:
Originally Posted by VWtoBMW View Post
Its been about a week and a half since I installed the JB+ on my car.

I have it set at 50% and am quite pelase so far. I am running Sheel V-Power with 91 octane. It seems that at about 3,000 rpm the engine really comes alive a lot more than it did. Very smooth from that point on. I have yet to red line (highest was 1000 rpm below it) the car since I have owned it but it seems a lot easier to get to that point.

I will probably crank up the JB+ a bit more in the near future.

Quick question: Will using 94 octane make a noticeable difference at the 50% setting? What about at the 65 - 75% setting?
With the 94 octane you can try it at 75%. A lot of my customers really like to run at 75%

Mike
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      08-25-2010, 11:30 AM   #3
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By all means set it to 75% and do the bypass
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      08-25-2010, 12:50 PM   #4
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Quote:
Originally Posted by SitDown View Post
By all means set it to 75% and do the bypass
Still a slight newbie here... What is the bypass?
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      08-25-2010, 03:08 PM   #5
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young padawan

I'm actually on the fence about the bypass. I'm at 75% and I'm going to let my car adapt for a couple days, do the bypass and see what the difference is like. If anything noteworthy happens, I'll post it here.

From the 8 billion threads I've read on this, the bypass is entirely optional at 75%...it's just a matter of preference. I drive a 6MT and am eager to see whether it really makes a difference.
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      08-25-2010, 03:30 PM   #6
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Quote:
Originally Posted by VWtoBMW View Post
Still a slight newbie here... What is the bypass?
You reroute/bypass boost solenoid lines. Only takes a few minutes, and you will feel the difference. See page 12, starting with 2nd paragraph thru page 13 (all other info does not apply to JB+).

http://burgertuning.com/instructions...5i_Install.pdf
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      09-23-2010, 05:45 PM   #7
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Update!

After running the JB+ at 75% (93 octane gas from Sunoco in PA, 10% ethanol) for a few weeks, I felt like I was used to the car enough to try the bypass and see if it made any difference at this boost level. I do want to note that I did get 1 'engine malfunction'/limp without the bypass but I haven't scanned my car yet so I'm not sure it was JB+ related...it happened at full operating temp, WOT pull to redline in 2nd gear (and I very rarely do WOT pulls or that many rpms).

SO, anyway, I did the bypass which was totally straightforward and not really that hard but it did take a minute because I was really careful I didn't break anything pulling the hoses off. When I pulled off the first hose it hissed at me a little bit which was kinda funny.

First drive: seems to spool a bit quicker and, from what my ears tell me, it holds more boost. I'm not exactly sure what that solenoid's job is but I hear considerably more turbo whistle and it almost sounds like I have a blowoff valve in there now lol. Ran it up through second and third gears through most of the rpm range and it felt really strong. I did pull out and do a quick run up through 1st gear to get in front of some traffic and I then I got an engine malfunction/limp again...sigh...really need to bust out a BT on that thing and get to the bottom of it.

Both limps I got cleared after cycling the car. Overall opinion so far on bypass @75% on 93 octane = worth it, quick and easy...will only take a minute to undo it for dealer visits.

Anyone have any quick thoughts on these limps? I'll post here when I find out what the codes were...
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      09-23-2010, 06:11 PM   #8
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The only limp code i've thrown on my car was the day after removing the JB+ and back to stock. Was my error, the shorter vacuum line had split slightly when I re-routed it back and created a leak (30ff). Simply replaced the lil vacuum hose and been golden since.
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      09-23-2010, 06:23 PM   #9
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Any tips on getting the hoses off? I tried so hard to get them off, but doesn't seem like it would budge.
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      09-23-2010, 06:31 PM   #10
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It all depends on what the code is. If it's coming up during WOT its normally something tuning related (or something on the car not up to the task), if its coming up when letting off the gas its normally VANOS. Just let me know the codes when you have them and I'll get you pointed in the right direction.

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      09-23-2010, 09:10 PM   #11
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
It all depends on what the code is. If it's coming up during WOT its normally something tuning related (or something on the car not up to the task), if its coming up when letting off the gas its normally VANOS. Just let me know the codes when you have them and I'll get you pointed in the right direction.

Mike
Thanks Mike - right after I posted this update I went down to my car to head over to Hooters for a local thursday meet - I got a 2-3 second long crank. So I guess we know what it COULD be...

Getting Helix to check my codes tomorrow and I'll report back. 53k and I'm still on the original HPFP so it's probably about time...sucks though because I finally had my car exactly how I wanted it. Good thing the JB+ and bypass are so damn easy (thanks for that!!)
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      09-23-2010, 09:14 PM   #12
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Quote:
Originally Posted by dailo View Post
Any tips on getting the hoses off? I tried so hard to get them off, but doesn't seem like it would budge.
yeah, you gotta pull those suckers. the long hose ('left one') is easy because you can really get a good grip on it and yank STRAIGHT up (my engine was pretty hot...might have helped) and I guess I did try to twist it from side to side a bit to loosen it up. The small one is really kind of a bitch but I got a tiny screwdriver and stuck inside it to kind of loosen it a bit/break any seal (be careful not to rip it!) then took the line out of the aluminum clips and basically pulled straight up on that plastic "T" connector where everything comes together...luckily, the small tube came off on the correct side and I was all set!

I'm thinking it'll be easier to switch after the tubes have been on and off a couple of times...
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      09-24-2010, 04:47 PM   #13
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Scanned the car today, had HPFP codes, a 2DEC code related to unhooking the battery, a 3100 code indicating limp mode (automatically thrown with any limp, almost certainly related to the HPFP) and a tuner code (either 2D18 or 2D25C, cant remember which).

That solves the question then - JB+ did throw a code which is no big deal obviously and pretty much expected @75% and messing with the bypass, BUT it did not cause my limp. Hunch confirmed: HPFP is dying. At 53,000+ miles, it's hard to complain about that...

Crossing my fingers I dont get stranded though

**EDIT - forgot to say, going from JB+ @75% w/bypass back to stock is PAINFUL. I can't wait to get this resolved. NEED that power
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      09-25-2010, 08:19 AM   #14
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What is the purpose of bypassing the boost solenoid?

Extra power? Smoothness? Quicker Spool?

I hate to do something to my car without knowing why.
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      09-25-2010, 08:20 AM   #15
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Quote:
Originally Posted by bkr335 View Post
a tuner code (either 2D18 or 2D25C, cant remember which).
What year is your car and what software version are you running?
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      09-25-2010, 12:46 PM   #16
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Originally Posted by Rustang Cobra View Post
What year is your car and what software version are you running?
Newest software I believe (don't have my service slips with me but my car was just updated mid-summer). It's a late 07, build date Sept 14, 2007.
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      10-20-2010, 09:10 PM   #17
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Quote:
Originally Posted by Rustang Cobra View Post
What is the purpose of bypassing the boost solenoid?

Extra power? Smoothness? Quicker Spool?

I hate to do something to my car without knowing why.
Anyone?
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      10-20-2010, 09:29 PM   #18
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Quote:
Originally Posted by Rustang Cobra View Post
Anyone?
You pretty much get a better/quicker spool, and it holds more boost up top. More power in higher rpm's.
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      10-21-2010, 03:12 AM   #19
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No problem with my var (2007e92 and soft A3.45.c0) and jb+ in 50/60% setting.

JB+ in 75% setting return a classic error 2d25 everyday

European 98Oct gasoline (Agip Blu Super)
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