Turbo upgrade and swap. Need advice.

[Driv3r]

Hi everyone,

Looking for some advice from our gurus. I recently swapped my M535i M30B34 engine with M30B35 from E34 that came from another E30 project (was tuned at 307KW@25psi). The M30B35 has stock bottom end, OEM HG, ARP studs with turbo CatCam, TCD turbo exhaust manifold and Tial wastegate. It ran for a year on E85 and had no problems before the swap. After the swap, my E28 went through all the relevant upgrades that includes: LS2 coils, full fuel system upgrade, surge tank, ECU Master Classic ECU, heavy duty clutch, full Ground Control suspension kit, Tarox big brake upgrade and so on.

Currently running at 15psi on E85 dyno result was 275KW atw. I picked up the car last Friday and the shop asked me to note down any fault and failure and return in two weeks so they can address all necessary adjustments and remedy the issues and also have it ready for the engineering certificate (for registration purpose).

Car drives fantastic and its so much fun when it hit boost. Currently set at two map settings (10 & 15psi) that can be changed by a launch switch. It will be tuned at 10 & 18psi after we replace the Tial wastegate (due to a current faulty spring).

Problems that I've currently noted are:

1) Slight tapping or knocking sound from the engine like what you would expect from a diesel engine (see 0:40 in my youtube link). Not sure if I'm overreacting or not but it didn't bother shop engineers. What are your thoughts?
2) Crank pulley is slightly wobbling. I was told about this before taking the car but they said it can be adjusted after i return the car in 2 weeks but when I was driving home (after I drove the car like I stole it!) the aircon belt came off under high rev and got jammed under the other two belts causing all other belts to snap off. Managed to put the other two belt back in and drive home. I'm just worried that the wobbling crank pulley could be related to the crank shaft but shop mechanics told me that it's not serious. Has anyone had this issue?

Here is a video:
https://youtu.be/poCFWN9QqgQ

Regards,

Kaye

[Shadow]

obviously the loose crank pulley is ultra bad because it can fly off.

Also, can you post a dyno graph?

on the knocking. i built an engine that had 000000 rattle at all.
ultra smooth. it was unnaturally smooth for an m30.
The m30 i'm running now i rebuilt and is clicking an clacking reving it high 460hp all day.
one thing that i should say that the piston/bore clearances are on the big side but once it heats up its all good.
junkyard motors just thrown in every one of them had some sort of knocking even my old m20.

my opinion it shouldn't click and click if it's new but.. i don't really see a problem, unless there is a problem.

[MichaelKah]

The best and most cost effective way is to swap in a BP then add the turbo. I can only help so much. Please look in the FAQs there is full swap guide and donor lists. Did you check out the worklogs yet?