Jump to content
WI BIMMERS - Wisconsin's BMW Community
Sign in to follow this  
GunMetalGrey

I Have a Problem

Recommended Posts

I know, I know, I know, I moved and abandoned everyone, but the car and truck both have WI plates so it kinda counts, right?
The real reason is to keep track of things, and this forum format is pretty slicks.

So, I bought another E30. Like any logical man I made sure to buy one that was thousands of miles away, and too low for any sanely priced shipping company to touch. 
Took my truck to WI to say hi to a few people, fly out to CA for work, then fly back to WI so I could load up the car on the trailer and head home with it. Nothing like a 4,000 mile round trip to grab a car!
image.png

So the real question here is; why?

This is a car that has been mentioned from time to time, a handful of you know it, but never had much presence on the internet or in person. This is the car that a friend purchased shortly after he saw me rebuilding my first E30 and thought it looked cool. I've been working with this car since day one, and know the details on all of it, so minimal surprises.
He's owned the car for around 10 years, and it has seen an M10, M10 turbo (shortly), M50, and the current setup. It has been the bastard child of many projects, but what I really wanted was the current drive-line. 

Car Details:
1984 318i
Rear euro bumper on, front in the car to be put on
full late model brake swap
houndstooth / black leather interior
Koni adjustable suspension, poly throughout the whole car for bushings
M3 steering rack

Engine Details:
S52 OBD1 Swapped
11.5:1 Pistons (bored over)
MLS Head gasket (.01" taller than stock to compensate for block and head decking) 
Shrick Cams
Bavarian CNC port and polished head
Upgraded valve springs
Solid lifters (?)
M50 Intake manifold
Riot Racing big bore throttle body
3.5" Euro MAF
24lb injectors
Turner Underdrive pulleys 
ARP hardware throughout 
Ceramic coated headers, full stainless exhaust from Mr. Asparagus's NA setup

Needless to say, the car can really get out of its own way. 
We rolled the car across a scale a year or so ago which was very similar to how it sits now, and the scale showed 2,400 lbs. Lightweight NA power is a whole different ball game from what I've known. 

The car needs plenty of clean up work as it has been "neglected" for many years, a lot of the finer details are not in a way that I appreciate. 
I'm excited to be back behind the wheel of an E30 that will actually be enjoyable to drive (the diesel noises were cool before, but the rest was strongly mediocre).

Until next time!

 

Share this post


Link to post
Share on other sites
12 hours ago, YoungCR said:

Glad to see this isn't gathering dust in a corner! I haven't seen this car since it was at your old old shop.

Yeah it's been a paperweight for the most part lately, will be good to have it back out on the road!

8 hours ago, SteelBlue said:

It definitely scoots.

It looked really good after I did a paint correction on it however many years ago, but it sat outside that winter...

Yep, that was good stuff for sure, minus the missing wheel cap. 
image.png
 

Share this post


Link to post
Share on other sites

Long time no update
This thing has been a struggle. 

Things that were happening; engine was stumbling around 3200-3500rpm and sometimes wouldn't push past it, light throttle would allow those revs. Would hit some form of limiter far before what the hard limit is set to. 
I thought it may be due to 92 octane (10% ethanol) vs the tune being for 91 no ethanol. I tracked down some 92 no ethanol (technically not legal in WA) and tried that. No dice
Hooked up a wideband to see what it was doing in that range and noticed that it would lean out on light accel and was running right on the edge of what seems comfortable for being too lean. 

Took the fuel pump out while I was trying to further investigate my lack of fuel gauge and was reminded of the time when the pump in this car was being changed and I noted you couldn't dangle a fuel pump with a piece of wire cable tied to the fuel pump bracket. I dropped the pump back down and verified the pickup of the pump was sitting on the bottom of the fuel tank. 
Drove again and the AFR's came back nicely, but still struggling a bit in that 3k and rev limit range, though I noted a strong increase in midrange torque. 

I had been monitoring spark plugs and cylinder tops and had noted that each time cylinder 6 was wet on top, and so was the half of cyl 5 that is near 6. Tried blowing them off to see if it was fuel from a leaky injector or something of the like and nothing happened. Cylinder 5 and 6 were the lowest in a compression test, so the head came off assuming the HG didn't manage to hold through the lean abuse. 

Off came the head, the old gasket did have faint notes of failure.
image.png
I decided to go with another MLS as my last cut ring experience was not good, and I was unsure if the stock HG would allow for the 87mm bore pistons. When removing the old gasket it seemed thicker than it should be (.08" was the previous order) and I verified that this engine has been using a .100" thick gasket this whole time. A rough ratio shows that it brought the compression back to just about stock. 
I ordered stock thickness so we will see a hair above 11.5:1 compression now. 

Started reassembling the engine and got everything timed up and assembled, went to install the primary chain tensioner and it never got tight. Surprise no more threads in the tensioner hole. 
image.png

Called around to see who had an M26 helicoil with no success. Tried a local E36 shop who said on the phone they had them and could fix it, drove an hour there to drop it off, waited for 2.5 hours, then got a call saying they couldn't fix it and they didn't think they even made helicoils that big. That was a colossal waste of time and made me super happy.
i ended up ordering a kit to helicoil it as I'm not super keen on welding in that hole and would still need to pay someone to bore it back out and tap it again. 

In good news I finally took it from the original (adorable) early 318i front brakes to the late model brakes with all new parts.

image.png
Hoping to have the head back on by Saturday before I leave for another month work trip.

.....This was supposed to be fun to drive and just small projects

 

 

 

 

 

 

Share this post


Link to post
Share on other sites

Got the engine back together and was still getting breakup issues around the 3500rpm mark, but wouldn't stumble if I was spinning tire at that point, and got worse as the engine warmed up. Being unsure of the quality of the chip tune, and long time desire to see this dyno tuned, it was finally time to take it in and see if the tune was to blame.
After some wood and time to get it up the dyno ramps (it's not high off the ground...) it was nestled in and the tuning commenced. Yes the door was open for tuning.

126252944_3711979398823345_6170488384619

The first pull on the chip tune yielded a very lackluster 236hp and 231lbft of torque, and the breakup around 3500rpm really reared its head.
I would be lying if I told you that I was happy with that amount of power, but rolled into it knowing that may happen.
The tuner then took the existing tune out and tossed on one that he had from a roughly similar motor to see how it liked that. The pull was smooth and didn't break up with the new tune, and it sounded much better. I glanced at the screen and saw 296hp flash across it, and I looked at the tuner to verify what I had just seen. He hadn't looked at the number yet, so we went over and looked. Sure shit, first pull with a different tune and we gained 60hp. We were all quite impressed, as that was nearing the highest HP S5x they have ever seen NA, and its a specific E36 shop that builds many a motor. 
More tuning commenced and the motor responded really well to any changes and kept improving in powerband and peak numbers, though as the engine would heat-soak the breakup around 3500rpm would return no matter how much fuel or timing was added/removed. That one boils down to a hardware issue somewhere that I am working on tracking down.
After a few hours of playing he finally determined that it was doing the best it could, and put down some serious numbers that everyone was happy with. image.png

We managed to pick up 75hp and 45ftlbs more torque on an NA engine which is simply astounding. The car is now making more TQ across the entire range than it made in horsepower on the chip tune. The rev limit is at 6600rpm right now and once I find that breakup issue when warm (affects rev limit also) I will be going back and having the limit moved up a fair bit as peak horsepower is at redline right now so I will likely continue to make more power.

The car is an absolute machine now, it pulls hard and smooth throughout the whole range and I keep hitting rev limiter because at no point does it feel like I need to shift. 

Absolutely stoked with the whole tune, and the guys at the shop were great to work with. 

 

Share this post


Link to post
Share on other sites

Wheel centers and the euro front bumper have definitely helped this car's appearance.

Those are turbo tuning numbers in terms of gains. Understandably so, given what's in the motor. Looking forward to going for a ride at some point.

Share this post


Link to post
Share on other sites
1 hour ago, KaiserRolls said:

Great results.

i know you’re OBD1, but was he able to log any IATs or anything during the runs? Heat soak that quickly sounds not fun

 

It's not an intake thing ( I don't think at this point) as the intake tube was cool the whole time. I'm thinking there is a sensor on the fritz or something like that and is affected by temperature. It didn't have the breakup issue in WI but started happening shortly after bringing it out here. 
I tried (5) different coils today and that didn't change anything, so will shuffle them around and try again. I had tried a new crank sensor but the new one was DOA. Not entirely sure what else to start chasing down. 

 

1 hour ago, m42b32 said:

There's just something about an early model with euro bumpers, it looks so good. Amazing numbers! I bet it's an absolute riot to drive. 

It's a classy look for sure, but doesn't sound or drive classy! 

Drove it around a bit today, and realized how much I hate the clutch. It was put in when he thought he was going to do boost, so its a stage 39485958 6 puck unsprung on a single mass flywheel. It blows, that's pretty high on the list of things to replace because it simply isn't enjoyable. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.