The JCW/GP2's seem pretty maxed out from the factory although the lower CR (at least on the JCW, is it the same for GP2?) might offer some room for gains Terry has stated before.

EDIT: GP2 seems to have CR 10.5, same as S. So, does that mean GP2 hp/tq is the max you can expect from an S keeping reliability at 'stock' level? I'm assuming it also has the same block strengthening as the JCW to be able to withstand being racetracked? Just from that spec alone it seems like the JCW engine has more potential than the S or GP2. All currently have the N18 engine.

Since the internals are almost identical between S and JCW wonder how much psi the JCW pistons can safely take?

EDIT: After some research looks like:

JCW has 10.0 CR vs S 10.5
~19psi vs ~14psi
208/192 hp/tq vs 181/177 hp/tq (torque does not show overboost)

Does anyone know what psi the GP2 runs stock? Can't seem to find it online.

The JCW has upgraded piston faces and cylinder lining. GP2 hp/tq differences are small from JCW.

SO, if the S engine can run up to ~20psi before exploding, does that mean the JCW can go ~25psi? I'm assuming it's not that simple.

And if the extra 5psi stock with 0.5 lower CR gives almost 30/30 hp/tq difference will another 5psi more give an additional 30/30? I would guess no (it would give you more) because an extra 2 psi on the S gives you 20/30 via JB+.

 

Has anyone tried running 21 psi? Just asking since I know someone will at some point if they can.

 

I did not notice anything like that.

 

Lord have mercy on them hahaha.

 

From what I have read here, the S has a boost limit of ~20psi. After that, the sensors stop being useful and/or piston damage happens from detonation

The JCW engine runs stock to 19psi so the limit is not there (or it is raised).

 

I have, car was insane fast. Logged in at 20.83 psi on the scan gauge. Keep in mind I've gots the meth!

I have since backed it down, per Terry's strong recommendation. Not the best idea unless you are monitor timing VERY closely =]. His words.

 

You running 18-19 now?

 

Yes, currently at 18psi

 

He probably just saved your life or at the very least your engine

 

Yup, I was only planning on leaving it like that for a few pulls.....but that's all it can take sometimes.

Glad I made it to the other side haha

 

Curious to see what Terry can do for Stage 1/2 with the S engine, he knows a lot more than me after an afternoon of internet searching

 

Heh, I knew someone would try it Sometimes ya gotta just go for it to be a pioneer.

 

I'm also very interested in the next level of development. I'm always looking to squeak out a few more ponies.

 

ugh, no one cares about N14 in this thread, hence the thread title.

 

anyone have a compressor efficiency map for the MCS 2011+ turbo? I'd be reluctant to think 20psi on this twin scroll turbo would be beneficial. I suspect it would just be blowing hot air at that point, and roasting itself to death. There is a point where more psi does not equal more power, and it seems to come earlier on twin scroll turbos versus single scroll, common misconception among performance enthusiasts.

 

I have a 13 JCW CM and have been really interested in this post. Is this something that might be beta tested in the future?

Thanks

 

+1

 

It's unclear what the wcdc map rate is currently with the JB, the only person that may know is the owner Terry. I personally suspect the effencity from 3000 rpm to red line with boost set at 18psi is fairly close to 100% max, another word, hitting its max load targets.

 

Terry should care, leaving money on the table.

 

get an accessport and a protune! just like the bmw guys!

 

Easier said than done. I have the AP, but the Protune would require me driving far far away since there only a handful of approved Mini Protuners.

 

Yeah... you just don’t want to get that award posthumously.

 

Testing is going very well. A couple notes.

1) I don't read the forum often, and we don't offer any technical support or assistance on forums. So if anyone winds up needing any help with their BETA JB+ then you'll have to email us.
2) As of right now we have more than enough BETA testers. Please do not email me asking to join the group. For now I am going to switch any inquires on the N18 to a form response. Don't worry. When we're ready for more testers I won't forget to post here.

 

Terry I've got a question. How does this thing work? I don't doubt that it does, a buddy of mine has a 335i with a JB on it and the thing is a rocketship.

It just intercepts the MAF sensor and tweaks the readings, right? I'm familiar with this concept from the pre-OBD tuning olden days of the Super AFC and similar systems, but those were generally used to smooth things over with the ECU after you had done things like installed larger injectors, upped the fuel pressure, and installed a boost controller or even a bigger turbo.

Also, when do you start accepting pre-orders?

 

well first let me say that mine is a R60 CMS ALL4...euro spec

second thing is that ofc it has a MAF sensor...why wouldn't it ? i actually stared it in the eye when i opened the hood

my only concern is if the mappings are similar...or if any other fine tuning that differentiates the euros from american would make life with the JB+ not a pleasant one