MIKe30's 11:1 cammed OBD2 s52 build

[z31maniac]

Mike, I'll just throw this out there. For the time being I'm just going to buy rebuilt calipers from BMA, they are rebuilt and painted silver for $40 + core, but you get your core back when you send your's back.

To me that is too cheap to fuck with rebuilding.

[Van Westervelt]

Pilot bearing is to match the input shaft on your tranny, so you are good there.

The throwout bearing release arms are usually fine unless you see a visual abnormality or problem. Only had to replace one before, and it was bent due to an exploded bearing.

You do need a clutch alignment tool.

[MIKe30]

getting the extensive list of parts together on pelican to purchase.

so far:

front caliper repair kit x 2
front brakes
front rotor x 2
rear caliper repair kit x 2
rear brakes
rear rotor x 2
535i green engine mounts x 2
sachs clutch kit
pivot pin & spring for t/o bearing release lever
input shaft seal for tranny
output shaft seal for tranny
selector rod seal
both cover plates and felt ring for pilot bearing if need be
guibo

edit: made some executive decisions...
questions (pardon the ignorance):
need a new pilot bearing? if so, one that matches the motor or the tranny? I ordered the pilot bearing that matched the tranny and trans internals, hope that was right.
need a new t/o bearing release fork? do they really go bad?? Decided to re-use the old one, dont see how this can go bad.
really need a clutch alignment tool? Forgot to add this, really a big pita without it or not so much?


this shit adds up. think this list only leaves me with an m42 radiator to purchse, motor mount brackets, and possibly a harness adapter if i dont feel like wiring it myself. Then just other half of bimmerworld kit and exhaust. FML.

starting to consider selling my clean 318is daily i just picked up to fund this :/

[MIKe30]

Yea, 260 and S3.73 rear end for now. Will drop to 3.46 or 2.93 if need be later. Sell me the parts I need people!!!

[sharksforthecup]

Wow I'm excited to see how this build goes! I'm building a very similar engine.
I just ordered my custom 11:1 87mm bore je pistons today with gapless rings from top end performance. They'll be here in a month or so then I'll drop the block/head off at the shop. I've got sunbelts sitting on the living room floor too! I'm thinking about doing the trm remote tune with the same idea of the baseline tune and having it modified. Maybe matt can chime in, but from looking at their site I would think they'd do it as many times as it takes to get the proper tune. You just got to pay for dyno time. Keep us posted!

[mbonder]

First post seems to infer a 260 for the trans, don't think he mentioned what rear end though

[e30polak]

AA tune is a custom dyno tune. They will send me a baseline tune, I go get it dyno'd, send them the graphs - and then they fine tune it. 2nd flash is free, anything after I have to pay for. CMT on bf.c said his was spot on after the re-flash, his dyno's appeared to support that too.

Not to jinx it but I'm expecting/hoping 290whp. We'll see. Hoping to to order some bits tonight so i can get started on the weekend.


So I'm definately going to delete the secondary air pump, rear o2 sensors, and ews. What's this EGR valve sharky is talking about?

That's optimistic, but not impossible with your set-up. It'll really be up to what AA can do with the tune. What trans and gear ratio will you be running?

[MIKe30]

AA tune is a custom dyno tune. They will send me a baseline tune, I go get it dyno'd, send them the graphs - and then they fine tune it. 2nd flash is free, anything after I have to pay for. CMT on bf.c said his was spot on after the re-flash, his dyno's appeared to support that too.

Not to jinx it but I'm expecting/hoping 290whp. We'll see. Hoping to to order some bits tonight so i can get started on the weekend.


So I'm definately going to delete the secondary air pump, rear o2 sensors, and ews. What's this EGR valve sharky is talking about?

[z31maniac]

Those are pretty impressive numbers. I'm guessing at least Schrick race cams and their Stage 3 Head. Probably suffers low end with those numbers.

Metrix Motorsports claims to build a 300+whp S52.

I want that + 6 spd.

[rThor432]

Those are pretty impressive numbers. I'm guessing at least Schrick race cams and their Stage 3 Head. Probably suffers low end with those numbers.

I'm tempted to say that it is just their Stage 3 head (with hot cams, of course) with a stock rebuilt/lightened bottom end. Not 100% sure though. May suffer a bit down low. He's running a 3.73 with the ZF 1:1 box, so he's got plenty of gear to help with the slight loss of bottom end torque. Strict DE car, but it's an insanely nice car. He's on this board a good bit and hopefully one day he'll post up pictures of the damn thing..

[sharky]

Sounds awesome, a little thread jack, I am doing a S52 swap and have all the EWS stuff but would like to delete the rear O2's, EGR valve and secondary air pump as well as the EWS just for sake of ease and less things to break. Are there any things that I need to get welded or plugged up when I remove the secondary air system? Who has some really good tunes for these?

[e30polak]

The dyno tune would be a nice touch for a motor build like this. I've also heard that AA's tunes are only so-so.

FWIW a friend of mine has a motor (S52) that was built by VAC and did ~280whp on the dyno. Wasnt terribly pricey and definitely got my attention.

Those are pretty impressive numbers. I'm guessing at least Schrick race cams and their Stage 3 Head. Probably suffers low end with those numbers.

[rThor432]

I'd say cough up a couple hundred extra for a custom dyno tune. The AA tune wont do the motor justice, plus their tunes aren't all that great. My $.02.

The dyno tune would be a nice touch for a motor build like this. I've also heard that AA's tunes are only so-so.

FWIW a friend of mine has a motor (S52) that was built by VAC and did ~280whp on the dyno. Wasnt terribly pricey and definitely got my attention.

It's good to hear that they have the baffled E34 oil pans done! Excellent news.

[etxxz]

if you're gonna send your ecu to say...bimmerworld... you might as well get the ews deleted with the rear O2 and get your tune.. at the end of the day it costs the same as getting a spare key from bmw; which becomes really hard when you don't actually have the paperwork of the car from where you obtained your engine. i only have 1 key so i'm screwed if i loose it.

subscribed!!

[e30polak]

Sounds like it will be a lot of fun!

I wouldn't get too hopeful with the numbers though, but you've done plenty of research. The 11:1 compression wont give you too much, neither will the valve job. However, the motor should behave much better, with a very linear power band. Since you're doing all this work I'd say cough up a couple hundred extra for a custom dyno tune. The AA tune wont do the motor justice, plus their tunes aren't all that great. My $.02.