[Benandluna]

Originally Posted by bryan_f22

you have a downpipe which is probably another 12whp.

If you were to dyno it, id guess you are around 370whp.
That m4, 470whp. If he added downpipes, 500whp.

Theres no way ur car can keep up with it unless you only tried to run a block or two.
Or you are awd and hooked while he was spinning.

I wish the cars were faster, but they are not.

I just installed my downpipe this week. Granted the M4 was not DCT so a bad launch or any kinda fuck up could drastically change this.

But at least comparing to my twin turbo 135i with a JB+ I just dont see that huge a difference. Ill get some more hard evidence in a couple of weeks though. Going to drag at the track soon. So i guess that is the ultimate test. What happens on the road.

[Anthony235]

Originally Posted by Benandluna

I would like to see some proof of this. My friends M4 with a JB4 was definitely faster than mine but was not blowing past me with a dinan stage 2 tune and intake in my m235i.

also My M235i stage 2 dinan 2 felt as fast as my 135i JB4 twin turbo.

I think the word destroy is more like a tenth or 2 tenth a second. And I know from experience that i was very lucky with my 135i blowing 2 MAFS and 2 PUMA cases opened against me that post some VAG tool code deletions i didnt get caught.

We could all totally save 2k and put it aside for when and if something goes wrong with an aftermarket tune, and when it does, my guess it will be about twice that cost.

I would like to see some proof of your point actually

Sorry, but a M4 with a JB4 will walk like crazy on a FBO 235i w/jb4 (even more if it's a dinan piggy back)

A stock M4 you would hang pretty good.

[Benandluna]

Originally Posted by Anthony235

I would like to see some proof of your point actually

Sorry, but a M4 with a JB4 will walk like crazy on a FBO 235i w/jb4.

A stock M4 you would hang pretty good.

Hey I said wouldnt Destroy :-p

Destroy to me is like comparing a 13 second car to an 11 second car.

Doesnt the stock M4 run a 12.1 quarter mile, and the stock m235i run a 12.9 ?

Trust me i am not delirious and would ever think I could take an M4, even modded.

[Anthony235]

Originally Posted by Benandluna

Hey I said wouldnt Destroy :-p

Destroy to me is like comparing a 13 second car to an 11 second car.

Doesnt the stock M4 run a 12.1 quarter mile, and the stock m235i run a 12.9 ?

Trust me i am not delirious and would ever think I could take an M4, even modded.

Well I would use the word destroy as well

0.8 seconds and 10mph is a huge difference in the 1/4. If you're going from say a 40mph roll to 150mph it obliterates a m235. Now I'm just trying to use even more extreme adjectives lol.

All in good fun

[Drpoomanchu]

Originally Posted by Anthony235

Update: user installed/uninstalled JB4 without battery disconnected. He doesn't usually do it this way, but "got lazy". He damaged the ground trace on the DME. Car is now flagged by BMWNA for any DME related warranty items.

He put the JB4 back in and car is fine. I guess JB4 bypasses the DME ground trace.

Did he know that this was damaged after he pulled the JB4 as he took it to the dealer..? Wouldnt the car throw a code or drivetrain malfunction..?

[Anthony235]

Originally Posted by Drpoomanchu

Did he know that this was damaged after he pulled the JB4 as he took it to the dealer..? Wouldnt the car throw a code or drivetrain malfunction..?

No, he did not know what was wrong with the car exactly before going to dealer. He did throw 2 codes.

1 CEL before uninstalling the jb4 (that's why he was going to dealer originally). Apparently JB4 could not pull what the CEL was for.

2nd code (drivetrain error) after uninstalling jb4 before dealer visit. He believes this is when he fried his DME because he did not disconnect the battery.

[Drpoomanchu]

Originally Posted by Anthony235

No, he did not know what was wrong with the car exactly before going to dealer. He did throw 2 codes.

1 code before uninstalling the jb4 (that's why he was going to dealer originally)

2nd code after uninstalling jb4 before dealer visit. He believes this is when he fried his DME because he did not disconnect the battery.

Ok, im assuming first code was TMAP possibly and second being ground trace..?

[Drpoomanchu]

Can a ground trace potentially be blown from disconnecting anything on the car regardless of whether JB4 is tied in if negative terminal is not disconnected..?

[Benandluna]

Originally Posted by Anthony235

Well I would use the word destroy as well

0.8 seconds and 10mph is a huge difference in the 1/4. If you're going from say a 40mph roll to 150mph it obliterates a m235. Now I'm just trying to use even more extreme adjectives lol.

All in good fun

lol

[Anthony235]

Originally Posted by Drpoomanchu

Can a ground trace potentially be blown from disconnecting anything on the car regardless of whether JB4 is tied in if negative terminal is not disconnected..?

I don't see how it would be possible if the negative terminal is disconnected. I suppose you could do it if there was some sort of external power source in the mix of whatever you're doing to the car.

Ground trace is the likely cause of the 2nd code he got. Apparently the ground trace is circumvented when JB4 is hooked up and his car worked fine after connecting the Jb4 back up.

[Dylan86]

I'll be able to do an m235i (MT) vs M4 (DCT) comparison with my FBO setup come spring time. We plan on installing a JB4 first (on the M4) then the rest of the bolt-ons. We will run a few highway pulls on video to show what a FBO m235i can do against a stock, JB4 stg1 M4, etc.

I figured with my car being FBO that it should be really close to the M4 in stock form, from a roll. If my car can keep up to a stock M4, and still being on the factory turbo, I'm very happy with that. It's like, a baby M4 I don't need to walk on these cars in order to be satisfied like some, though..

[Benandluna]

Originally Posted by Dylan86

I'll be able to do an m235i (MT) vs M4 (DCT) comparison with my FBO setup come spring time. We plan on installing a JB4 first (on the M4) then the rest of the bolt-ons. We will run a few highway pulls on video to show what a FBO m235i can do against a stock, JB4 stg1 M4, etc.

I figured with my car being FBO that it should be really close to the M4 in stock form, from a roll. If my car can keep up to a stock M4, and still being on the factory turbo, I'm very happy with that. It's like, a baby M4 I don't need to walk on these cars in order to be satisfied like some, though..

That is going to be awesome, it would be great if you could show a manual vs manual or 8spd vs DCT.

Some other thread OP, i think in the 335i section is having some major Dinan tune issues. Some cars are just different i suppose. I think a lot of us get lucky we dont or havent yet had major issues pushing power into these beastly little vehicles.

[Taunto]

To put this Thread back on track!

I recently attended BMW training in Vancouver BC as a BMW tech this January and they mentioned it that they are starting to crack down on catching JB4 software since it is one of the most commonly used programmers.
That being Said, i think the only way BMWNA is going to be looking at the FASTADATA(which in short is the data log your car has which is sent to BMW servers after every time the vehicle is scanned) is only really going to be reviewed if the car needs Approval from BMW to replace a component..such as the DME..
When replacing a DME under warranty - the Tech needs to supply a case showing the faults, concerns, customers concern, tests they have done, pictures, TSB's if any, pictures if any, and also has submit a fresh FASTADATA to BMW to review.
From their BMW reviews it all and approves or declines the part.
So through FASTADATA yes a JB4 could be picked up if BMW see's it... If the tech doesn't notice it, or if they are someone like me and frankly don't care if the car is tuned or not, i usually don't say anything cause me and the dealership still get paid either way.

Like i said earlier - if the component requires approval from BMW to replace...then there's nothing the dealership nor the tech can do to have it not show up. A Tech's best bet would be to do a Battery Reset(disconnect the negative cable) for a minimum 1.5 hours..re-connect, reset all engine and vanos adaptaions...drive the car for 5-10kms...then re-scan the vehicle and submit the FASTADATA and from their, just hope they don't see it.

Not just BMW vehicle's but pretty much any modern vehicle today has very complicated and sensitive electrical components on the vehicle - if you or anyone is removing/disconnecting those components with out having the battery disconnected, than that's your fault..that's the first step in any repair.

This has actually happened to a lot of techs working on N63 engines for the customer care packages and shorting out BSD data lines and frying DME's..so even all BMW Dealerships stated if your working on any electrical components, and the battery is not disconnected...and u short something out...that part will be charged to you.

[Dylan86]

^^ Very much the case with VAG cars as well. What are your plans for the car, personally? Which route are you taking for performance mods, if any?

Been through the good and the bad myself with VW having flash tuned ECU's (before the Burger tuning days), cost me a lot. Piggy back tunes are our best bet IMO unless out of warranty, but nothing's guaranteed as said, and the ball is in your court if you want to play around with your warranty coverage. I'm fairly comfortable tuning this car because it's a fairly mainstream parts bin, and if I do F something, I can afford to fix it. Good news is my dealer is a Dinan vendor, and have very keen enthusiasts working there, that also fart around with JB4's themselves.

[Taunto]

me personally will do a jb4 due to the availability and known knowledge of the product.
But being a tech and working for bmw I can probally get away with most warranty repairs on the car if needed lol

[bryan_G01]

I will never use a jb4. Flash only.

Why use a piggy back with Bootmod3 available now?

[Dylan86]

When I'm out of warranty I'll be looking at a flash tune, probably Bootmod3

[Benandluna]

Originally Posted by Dylan86

When I'm out of warranty I'll be looking at a flash tune, probably Bootmod3

I probably will move from the Dinan once I am out too. Though I still have like 33k to go.

[josem235i]

I took mine into service today, JB4 map 0, I have ER charge pipes, and BMS intake etc.

I'm cool with my SA and he is "mod friendly"

Nothing was detected or flagged

I'll attach a picture of the page with what was done, all covered.

[Benandluna]

Originally Posted by josem235i

I took mine into service today, JB4 map 0, I have ER charge pipes, and BMS intake etc.

I'm cool with my SA and he is "mod friendly"

Nothing was detected or flagged

I'll attach a picture of the page with what was done, all covered.

Pretty sure that all changes if you blow something. Turbo, maf, etc.

There's only so much a cool sa can do for you.

[josem235i]

Originally Posted by Benandluna

Pretty sure that all changes if you blow something. Turbo, maf, etc.

There's only so much a cool sa can do for you.

Yeah that's true, but I really don't beat on my car I just have it for when "I need it".

I've never had a problem with the car to this day and I'm hoping it stays like that lol, but yeah SA's can only do so much, Great point!

[Benandluna]

Originally Posted by josem235i

Yeah that's true, but I really don't beat on my car I just have it for when "I need it".

I've never had a problem with the car to this day and I'm hoping it stays like that lol, but yeah SA's can only do so much, Great point!

Haha, I feel like I always need it. I do really wanna feel what's it's like with a jb4 in our cars. My old 135i was a small beast