IJE0S vs INA0S

  • Dark Theme is now available. Switch at the bottom of the page or in your preferences.
May 14, 2018
1
#1
Hi everyone.

Before the statement of "use the search function" starts, please note that i have used it, and google, and every other avenue, but all i get is MSD80/81 results, and some other threads. but nothing significant to what im trying to find out.

I have an '09 E92 335i N54 DCT. (South African car). it is currently equipped with JB4, MHD Pump BEF, gutted stock Cats and an upgraded Charge Pipe with Forge DV set.
the Wastegate arms have been replaced as well as the Turbos reconditioned.
I am getting slight Turbo Siren, but nothing crazy, and have just fixed a boost leak at the Intercooler to Charge Pipe connection. and made a bracket to hold on the Rear turbo inlet pipe as it had come off.
My issue is that car feels gutless, i cant even get the Traction Control light top flash anymore, an it used to flash at the slightest heavy throttle input.
my throttle is also extremely unresponsive, and very laggy.
My DCT shifts are not bad, but not smooth like they should be
whereas about 2months back, the car was very strong, and had decent response.
My ROM is IJE0S

i drove a friends '09 Z4 35i N54 DCT, mods were, Charge Pipe, Intercooler, stock Cats and Stage1 MHD OTS map.
the difference was night and day, his car had instantaneous throttle response, it was extremely strong, and lit up the TC light like a christmas tree all the time.
Hi DCT gearbox is ridiculously smooth even in Sports+ mode, and engages brilliantly.
His ROM is INA0S.

I know INA0S is the 335is revision ROM, but i just want to find out if the INA0S is the reason for the great throttle response, and smooth DCT Shifts.

I have read that there is a possibility to update the ROM on IJE0S cars to the INA0S version, but how, can i take it to the dealer, or is it specialist work? ive already contacted my dealer, and they dont know what im talking about, and im not sure exactly what to ask of them.

look forward to learning a bit more here, and hopefully i can get steered in the right direction. Id live to Update to INA0S, as ive heard great things.

thank you in advance everyone.
 

matreyia

Lieutenant
Apr 19, 2017
723
#2
I have the IJ version and no issues at all with power or throttle. Stage 2 plus mhd and Fbo with upgraded vacuum hoses.
 

RSL

Sergeant
Aug 11, 2017
275
#3
If INA0S is an updated rom for your car, could flash it with MHD or WinKFP pretty easily. If INA0S isn't part of the update path, could still do it, but would need a copy of a stock bin to flash...like pulled from your friend's car.

The real diff between your car and his is JB4 vs. flash only. With enough work, JB4+BEF can be "ok" on DCT, but if you tried JB4 and then flash only back to back, you'll likely notice the difference in DCT shifts immediately.
 
Oct 28, 2017
818
Monroe CT
#4
Contact Terry with a log he will get you setup perfect he has great customer support and knows his hardware better than anyone.
 

Jeffman

Lieutenant
Jan 7, 2017
847
#5
Remember: Maintenance before mods. I’d make sure to check your fuel injectors, walnut blast / clean intake, coils and plugs, etc., LPFP and HPFP pressures (do logs!) before looking to change the engine software.
 

matreyia

Lieutenant
Apr 19, 2017
723
#6
Remember: Maintenance before mods. I’d make sure to check your fuel injectors, walnut blast / clean intake, coils and plugs, etc., LPFP and HPFP pressures (do logs!) before looking to change the engine software.
I would not recommend altering engine ROM.
 
Jul 26, 2018
1
#8
jb4 and DCT does not run well together, the torque requests from the dme to the dct not correct anymore because of jb4 piggy back
 

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Thread starter Similar threads Forum Replies Date
veer90 N54 2

Similar threads

Top