[jwilliams]

Hi guys. I have recently sold my 2007 N54 335i.

I am thinking of a change to a 435i. As i know there is allot of flaming over on the N54 platform for the N55 equipped cars i thought i would ask here for a possible unbiased view.


I am looking at tuning my 435i like i did my N54 335i.

Im looking at a jb4 stage2 with EWG control and a downpipe. The fuel around my area is 99ron.

My N54 335i was running a jb4 G5 on map 2, exhaust and backend flash and was roughly 410bhp (not to the wheels)

Will the 435i with downpipe and jb4 stage 2 be as quick? Will it stick with it if they were to go toe to toe. Any noticeable difference etc?

Reason i ask is not for foolish reasons for racing etc but more to the fact that i do not want to have sold my 335i and put an awful lot of money up on top for a 435i to essentially be in a slower car as i know ill end up missing the extra power (if any) and will regret spending all the extra cash.

Any help would be gratefully appreciated.

[Mike_L]

An N55 with JB4 MAP 2 and downpipe should run about 370hp. Its not going over 400, not even close. Its gonna be slower.

[jwilliams]

Is that 370whp or 370bhp? As my 335i was 410bhp not sure what its whp would be. 370whp?

[ShlemonboostedM]

its going to be close to 400Bhp with Jb4 w/EWG, Downpipe, which will be bout 350-360whp .. shouldn't be much slower then your previous 335i if any

[Mike_L]

Stock turbo is only rated to 400bhp. Anything higher requires a new wheel.

[smolik]

435 put down 410whp on e85. That's better than my f30 335 on e85

[Mike_L]

Originally Posted by smolik

435 put down 410whp on e85. That's better than my f30 335 on e85

Got that dyno sheet? Burger says EWG cars don't run right on E85.

[smolik]

Maybe I'm wrong, just going off the site http://burgertuning.com/N55_JB4_F_ch...BMW_tuner.html

[Mike_L]

Originally Posted by smolik

Maybe I'm wrong, just going off the site http://burgertuning.com/N55_JB4_F_ch...BMW_tuner.html

Thats E30, not E85. Notice how the power drops off on the top end. The turbo is done. Its got nothing left to keep the power up. With a Pure Stage 2 and downpipe, that car could have made 450 easily, probably more.

[ShlemonboostedM]

the guy was shooting for 410bhp .. not Wheel Horse Power ... Which is easily achievable even with stock turbo on 435.. 410bhp is about 360-370whp or so ..

and the run fine with small mix of E85 .. don't exeed E30 and you should be fine .. but EWG cars do seem to run Lean on top ..

[jwilliams]

Thanks for the replies guys. I am pretty sure my previous N54 335i was 410bhp give or take. As a 335d 2007 was able to keep with it. So couldn't have been mental bhp figures.

Im so confused as people running map 2, backend flash on a N54 335i in uk dont seem to be seeing over 400bhp on those mods using a 95ron pump fuel.

So is the consensus here that mildly tuned N54 and N55 cars with just stage2/Map2 tunes are roughly the same output. But only when higher figures are wanted is when the N54 comes into its own?

[Mike_L]

95 RON is gonna be a problem with MAP 2. Thats only about 91 AKI. Not sure if I remember exactly, but pretty sure MAP 2 requires downpipes and at least 93 octane AKI.

[jwilliams]

It did not dyno any higher on 99ron so i stuck with 95ron as it was cheaper and made no difference.

I may just wait and buy an M4 at this point. Youtube is useless aswell at the moment as there are no jb4 435i vs n54 335i jb4 videos anywhere or any other comparisons apart from a full bolt on 435i with upgrade turbos.

So is my consensus correct in saying 435i jb4 stage 2 and 335i jb4 map 2 will be roughly be as quick as each other but achieving a higher tune than that would be harder than with the N54?

[Mike_L]

If you're good with rear drive and can afford it, I don't see any reason to pick a 435 over an M4. If they offered AWD, i'd be in an M3 right now.

[jwilliams]

In uk we do not get AWD 435i anyway. We seem to get jipped on most cars it seems. The only 435i i can get is RWD anyway. So i may aswell go a for an M4 at this point if the 435i is weak even with stage 2. As with a warranty on a new 435i i cant really go putting turbo upgrades on it. Lol

[ShlemonboostedM]

If you can get M4 instead of 435i and its not hurting your pockets I don't see the reason why not .. M4 stock is probably faster then 435i FBO + Meth and e85 lol .. Get M4 and don't look back ..

[jwilliams]

Thanks guys appreciate your help. Seems the N55 still is weak and probably is not going to change. Its a hard one as now buying a new BMW is out of the question for allot of N54 owners as they would be going backwards Unless they have M4 money. Oh well ill keep my eyes peeled for an M4. And worst case ill ho 911 turbo and be done with it. Lol

[PeterPure]

Originally Posted by ShlemonboostedM

If you can get M4 instead of 435i and its not hurting your pockets I don't see the reason why not .. M4 stock is probably faster then 435i FBO + Meth and e85 lol .. Get M4 and don't look back ..

I raced a dct f80 M3 with full akra and stock tune from 40mph to 120mph. I took 2 car lengths on it

[mike@x-ph.com]

Originally Posted by jordon335

Thanks guys appreciate your help. Seems the N55 still is weak and probably is not going to change. Its a hard one as now buying a new BMW is out of the question for allot of N54 owners as they would be going backwards Unless they have M4 money. Oh well ill keep my eyes peeled for an M4. And worst case ill ho 911 turbo and be done with it. Lol

400 bhp is now weak , damn you N54 you spoiled us with how easy you can be tuned.

[Mike_L]

Originally Posted by mike@x-ph.com

400 bhp is now weak , damn you N54 you spoiled us with how easy you can be tuned.

400hp is very weak. When you can buy domestic cars with 650, 662, and 707, 400 is childs play.

God I wish I could have gotten an AWD CTS-V, GT500 or Charger Hellcat.

[mike@x-ph.com]

Originally Posted by Mike_L

400hp is very weak. When you can buy domestic cars with 650, 662, and 707, 400 is childs play.

God I wish I could have gotten an AWD CTS-V, GT500 or Charger Hellcat.

domestic cars are very weak when you get get a GTR with 2000 whp
You're seriously comparing a BMW to a Hellcat ?
two different cars that serve different purposes.

[Mike_L]

Originally Posted by mike@x-ph.com

domestic cars are very weak when you get get a GTR with 2000 whp
You're seriously comparing a BMW to a Hellcat ?
two different cars that serve different purposes.

But you can't get a 2000hp GT-R off the showroom floor.

A Hellcat and 335 serve the same purpose for me. Car, big backseat, get from point A to point B and able to be modded and tracked occasionally. Plus they cost about the same.

And since I don't play the elitist game that BMW part suppliers do, the Hellcat would have been even better for me if Fiat Chrysler execs weren't such pigheaded idiots.