Hi guys....right the 35i, from what I gather its the exact same engine and same turbos as the 35is. Is it just a different tuning? If you both had them remapped by the same people would the output be the same? There is no dffernce in the engines ect? Correct me if im wrong please do. However the 35i is sooooo much cheaper than the IS... Is it really worth the extra just for the little bits you can buy with te difference in cost?
35i/35is
- Thread starter RoyS
- Start date
DMS quote roughly 375bhp for the 35i and 400 for the 35iS as there are differences underneath.
People say they are the same engine but the 1M maps higher than a 135i so I guess as the 35iS is the same engine as the 1M this explains the difference.
People said my 330d LCI was the same engine as a 325d LCI yet is maps 30bhp higher. Underneath there were differences and I am sure the 35iS is the same.
People say they are the same engine but the 1M maps higher than a 135i so I guess as the 35iS is the same engine as the 1M this explains the difference.
People said my 330d LCI was the same engine as a 325d LCI yet is maps 30bhp higher. Underneath there were differences and I am sure the 35iS is the same.
The 35iS gets the DCT auto as standard & adaptive suspension. So basically you're paying £395 for the nicer sounding, louder, exhaust & an ECU map. Also pay attention to insurance costs pre & post modding. For me the 35i costs more to insure & for the same power output attracts a higher premium increase as a % of the standard insurance cost.
Power output can also depend on how 'cracked' the ECU is. I couldn't find a difference in the mechanicals between the 35i & 35iS but there were parts in the electrical system.SO8 said:
SO8 said:
The engine code for the 35i is N54B30 as found in the E9X 335i's, E60 535i, E82 & E88 135i all till 2010 and the X6 and the code for the 35is is N54B30TO which is the same code as the 1M and that's it.
You get some more goodies on the 35is over the 35i as already advised but it's been muted on here that you get bigger discounts on the 35is making it more appealing than the 35i. Have you looked into this?
RoyS said:Angie4m said:
Thanksand yes looked into buying new te dealer wasn't very bice to me if you havent seen in my other post :/ going to try Ipswich dealers when I return home try my look there also looking at used cars also.
Oh yes, I forgot the dealer sounded rather rude. Hopefully you'll find a dealer that can give you all the figures you need to make a decision.
If you are buying second hand the 35i comes out cheaper. Dealers still putting quite on the IS model.
Both cars will remap to exactly the same output. The only difference power wise is the 35i car will come with a ROM version of INA0S (for example) and the IS model will come with INA0S_IS.
You can download the INA0S_IS ROM into the 35i car and have the same power output. With both cars you can remap them to 400hp without changing any hardware, maybe even slightly more depending on how hard you want to push the turbos.
Both cars will remap to exactly the same output. The only difference power wise is the 35i car will come with a ROM version of INA0S (for example) and the IS model will come with INA0S_IS.
You can download the INA0S_IS ROM into the 35i car and have the same power output. With both cars you can remap them to 400hp without changing any hardware, maybe even slightly more depending on how hard you want to push the turbos.
I've had it confirmed that there are no mechanical differences between the two engines since the introduction of TO variant, it's all software. However, the early 35i have marginally different components which make it more risky to extract the same power. For this reason it's common for tuning companies being a little more conservative with the 35i published numbers.SO8 said:
The thing I would worry about with remapping a 35i or 35iS to 370-400bhp is exactly how useable is that power ?? If it spins up totally in first and the majority of second is that really much fun ? Power is nothing without control as they say 
The standard output for a 35is of 335bhp is great. Maybe another 20bhp but more and I think it will spin up totally.
I also would not remap as I have a warranty and am not in the business of wanting BMW to find a map !
The standard output for a 35is of 335bhp is great. Maybe another 20bhp but more and I think it will spin up totally.I also would not remap as I have a warranty and am not in the business of wanting BMW to find a map !
SO8 said:The thing I would worry about with remapping a 35i or 35iS to 370-400bhp is exactly how useable is that power ?? If it spins up totally in first and the majority of second is that really much fun ? Power is nothing without control as they say
I also would not remap as I have a warranty and am not in the business of wanting BMW to find a map !
Just to be picky - 35is output is actually 340hp. More than enough to put a smile on my face every time I get in it! Sometimes more is less!!
Obs-Com said:SO8 said:The thing I would worry about with remapping a 35i or 35iS to 370-400bhp is exactly how useable is that power ?? If it spins up totally in first and the majority of second is that really much fun ? Power is nothing without control as they say
I also would not remap as I have a warranty and am not in the business of wanting BMW to find a map !
Just to be picky - 35is output is actually 340hp. More than enough to put a smile on my face every time I get in it! Sometimes more is less!!
340ps I thought ... which is 335bhp
th30d0r3 said:
ECU map changing is what we have been discussing. A new 35i will have a ROM version of INA0S, a 35is will have INA0S_IS.
The IS signifies that it contains code that will increase the boost pressure setpoint slightly for a small period of time during high load requirements.
When you remap the N54 you are essentially just increasing the load setpoint in the ECU (since the N54 is a load based platform). There are a few other tables that people alter to change the fueling, timing and also some that are changed to facilitate the increased load.
When both the 35i and 35is are tuned to 400hp(for example) they will both be producing the same 18PSI of boost (roughly), the turbos will have their wastegates at the same position and the power curve will look exactly the same.
You can run the boost as high as you want with a remap, the limit on a stock car has been seen at just north of 21PSI i think. 21PSI will yield exactly the same power in a 35i as it will a 35is.
If you have some evidence to suggest otherwise then I would be genuinely interested to see it.