Engine Mod Thread

[PiercedE30]

OK, list what you have done to your engine as far a performance mods/machine work/whatever. I am just looking to see what everyone has done to their motors and your impressions of those mods. List anything from 3-angle valve jobs, ARP studs, Nitrous, to turbos or superchargers or different cams or cranks. List it all....
Go ahead... list it.

[euroshark]

I used to have a high performance Hanes sock for an oil filler cap, but it got sucked into the engine once while I was racing and has resulted in giving my cam more lift and duration due to shards of it wrapping around all of the lobes.

Schrick < Hanes + Stock

My motors are physically stock for the most part. My M90B35 has a slightly milled head and a 3 angle valve job... The M90 already has awesome power and torque, and very nice throttle response due to the short stroke and big bore, so I really don't know if these changes enhanced anything but it needed a new head anyway.

Edit: I just realized this is in the 24v section, my beer vision failed me.

[Beej '86 325es]

I haven't run mine yet, but I'll have my engine back from the shop so I can start the installation by the end of the month.

S50, bored to 2nd oversize
11.1/1 CP Pistons
Schrick cams
Stainless +1mm valves w/ 3 angle
Ti retainers
Higher tension valve springs
Port/polish
Euro 3.5" HFM
Samco intake boot
24 lb injectors
Software TBD

[FredK]

Holy Christmas Beej, you're FINALLY swapping in an engine! Sounds like it's pretty much got all the bolt ons!

With the custom pistons and top end work, it will screw!

[Beej '86 325es]

Holy Christmas Beej, you're FINALLY swapping in an engine! Sounds like it's pretty much got all the bolt ons!

With the custom pistons and top end work, it will screw!

Haha, yeah...finally is right. I've been collecting parts for this swap for 2 years now! I'm still deciding what I'm going to do for the tuning though. I'll probably have a custom chip cut.

[backtrail69]

That car is going to scream!

[FredK]

Haha yeah I think I collected parts for at least a year before I really got down to business. :D

I have a Turner HFM, 24lb, Schrick for 506 DME chip if you want to fire it up without running ludicrously rich on the stock software... PM if you want it. Haha I am so shameless.

[equate975]

TMS Chip
24# injectors
3.5 HFM
OBDI Conversion

Never drove the engine stock, so I can't tell you how much of a difference the mods made lol

[e30polak]

TMS CHIP
24# INJECTORS
3.5" HFM
ASC+FAN DELETE
POWERLITE ELECTRIC FAN
COLD AIR INTAKE SETUP
USING CUSTOM 6-1 HEADER, W/ 3" EXHAUST+ HIGH-FLOW CAT& MUFFLER

I only drove the original m3, before the swap, so i can't tell how much the extras helped w/ the motor in the e30, b/c the power difference is unreal. But, I got such deals on the all the parts that I couldn't stop myself from buying them...still need to dyno the car

[dude8383]

Currently thinking about rebuilding an m42 that I have sitting in my garage.

I have virtually everything I need to rebuild one.

I may bore/stroke it a bit to get a bit mo powa!