u/Ok-Call-3200

Tossing around with the idea of finally putting some time and money into my 14 435i, had the car for about 4 years its always been really good to me. Recently I had some inclination to pull and build the motor. Started looking into prices on parts, and quickly realized it probably makes more sense to build a B58/S55 and sell the car, but I like being different lol. Went down a rabbit hole and found a bunch of options for cheap chinese 4032 rods and pistons. Reached out to a couple companies and got pricing around 1000usd for rods, pistons, wristpins, rings etc. They claim the rods and pistons will support 800-1000hp. Looking at H-Beams for the rods. KingTec and XR Racing were the 2 best looking ones out of the group. I know most are going to suggest just biting the bullet on Manley or CP, but I was curious if anyone has any experience with these? Trying to do a budget build on this car, already got a frame up going on a truck, and don't want to put too much money into the summer daily. For an idea, heres kinda what I was planning. Most of the time will be run on 93/94 octane but would like a E85 map, up here in Canada would have to get it by the barrel and just is not convenient for frequent use.

- Forged rods and pistons

- S55 Crank + 4 pin crankhub

- Epoxy closed deck block

- Resurface deck/head and hone cylinders

- Intake manifold with 750cc port injection

- DS25 HPFP

- Stage 3 LPFP

- S63 EU5 Direct injectors

- VRSF intercooler

- CTS charge pipe

- B58 Coil conversion

- ARP Rod bolts, main bolts and head bolts

- King main and oversize rod bearings

- 8374 or 6875 or G35 turbo

- Top mount manifold (cant find these cheap

anywhere for n55 - help lol)

- 8HP70 swap or spool stage 2 8hp45 kit

- Possible built transfer case or convert back to rwd or maybe X-delete (not heard the best things)

If anyone has any experience with a similar N55 build or can offer advice regarding the rotating assembly it would be greatly appreciated. Aiming for 600-650whp+ on E, hoping I can get around 550 on pump gas. I want to keep the price down as much as possible. I will be doing all the work (aside machining), myself, so labour wont be an issue. Not going for any world records here, will probably never take the car on track either, just want a fun n55 for the street.

I’m building an NV4500, and put a bigger input shaft in (1.375in), and a 13in flywheel. Can I run a NV5600 clutch or do I need to buy a dedicated clutch for the upgraded shaft? I already have a 5600 clutch sitting around that’s why I’d prefer to save money

I’m experiencing an issue where whenever I start driving my 14 435i, it throws a chassis fault on my Idrive screen, and anytime I cross over exactly 20kmph, it throws my car back into comfort mode from sport. RPM isn’t limited, no speed limiting, doesn’t seem to be in “limp mode”, but it’s throwing a 482A3C code under verticle dynamics management. “EDC - Valve Coil - Rear Right - Current Regulator Plausibility Fault”. The car originally came with EDC, but has been deleted for years by the previous owner. It has Bilstein B6 shocks with eibach springs and the rear shocks were replaced last year.

I’m wondering if anyone has experienced this issue before? Has something failed within the EDC delete kit? Not quite sure how it all works as I never installed the kit in the first place.

It is also throwing a CF1541 Trans fault code but from my research it isn’t related.

Any help would be greatly appreciated