hacker-pschorr

Stubborn I guess....

The enigne builders I work with do not like sleeving a motor unless it's absolutly necessary.
We have a 928 up here running 30psi via supercharger in a 100% bone stock engine. To date there is more than 25,000 miles on this setup with zero issues to speak of (see the Todd link in my sig). Granted it's using Autroinc and has eight seperate fuel / ignition maps.
If I ended up going stand alone with the Mercedes I would use the same ECU that which will give me the same tuning capabilities. I have no idea what kind of intake comes on these motors, but if they have similar limitations like the 32V 928 intake, I would pursue a custom one.

Then again I might just drop in a bone stock 5.0 Euro motor like I originally planned. I haven't really thought about this project in a long time, car has been in storage 10+ years.

123quattro

Interesting thread. Cool stuff.

marlinspike

Well then you guys have figured out boosting on Alusil and should just ignore me.

I have good pictures of the intake on a hard drive of a computer that is apart while waiting for thermal paste right now; however, you can see the lower intake in this photo
http://davidson.smugmug.com/photos/8...9_7GGwe-XL.jpg
and you can kinda see the upper in this photo (I dropped a custom machined non-magnetic screw...had to get it....)
http://davidson.smugmug.com/photos/8...7_vn3CB-XL.jpg

I was talking to a guy who said he could bore my throttle body out another 7mm, I just need to get him a gasket (which is easy enough, I just don't want to both with taking intake parts off again right now), so maybe there's some more power there who knows.

That brought a tear of sadness to my eye.

hacker-pschorr

Lot's of dyno tuning.......here is the 8 wideband setup:
https://rennlist.com/forums/928-foru...light=todd%27s

Oh yea, that intake. Like I said, it has been a while since I poked around the Mercedes stuff.

I don't like it either, but it's a better fate than most would have put this car through. It's in a heated storage facility, safe and sound until it's time to start wrenching.

marlinspike

Psh, first thing I did was ditch what little electronic stuff the CIS has. O2sensors? What O2 sensors? That's way too complicated for me.

Nightfly

That's the post that says it all. The cars are close enough in performance; all it takes to win or lose a drag race is a difference in launch, a very slight change in shift points or an infinitesimal delay in engaging the next gear. Unless of course you're racing with automatics and letting them shift on their own, and then basically what's the point anyway? You might as well hire someone else to drive it for you.

The magazine tests are usually done with a seasoned pro at the wheel, and even they rarely manage identical best times. The times you read about are the best ones they manage on any given day; other runs are done, but aren't as quick. So the odds of you being able to match a pro's best run when only doing one is remote indeed (unless you're Don Garlits or some other championship class driver, I'd name a more recent drag racer but I haven't followed drag racing in 40 years). When you're talking about hundredths of a second to get the shift exactly right, it all comes down to who gets it as close to perfect on the single race. And....the odds of you both doing that in the same race are nil.

That said, the only BMW I've ever thought was remotely nice looking was the M1. The rest are all sedans, and you may as well want to drive a taxi, they're so plain. The 928 is a thing of beauty. Park one out at the end of a row in a mall somewhere, and then go sit and watch. People will drive out, and stop, just to look at it. No one does that with Bimmers. Or Evo's. Or AMG Merc's. No matter how fast they are. A sedan is just a sedan.

marlinspike

I agree there is no such thing as repeatability, but it gives a frame of reference. Having said that, there is nothing for a seasoned pro to do in an auto 540 - just mash the pedal to the ground from a standstill.
Also, each mag has its own formula, but I don't think any of the major mags uses a single best run (C&D might, I forget). Motor trend averages the best 3 and road and track the best 5 IIRC.

Also, how are all MBs and BMWs sedans (save the M1)? You wouldn't drive out to look at a 300SL? A Pagoda? a BMW 507? And these are all sedans? People don't drive over to look at a 997. What you're missing is that the 928 is a design that came out in the 70s. I think people would drive over to look at W111 cabriolet or a 3.0CSL. It has a lot more to do with the vintage than the make.

blown 87

The current wunder Kid is Tony Schumacher, he has broken just about every record out there for number of wins in a TF car.

I am not a fan of his, but I do respect his ability as a driver.

They are going to be at Thunder Valley (Bristol TN) this weekend and it is a great track.

Last weekend was the first 3 second 1/8 mile run, Cory Mac ran the 1/8 in 3.007 seconds at 275 MPH, that is a shocking number when you think about it, and the 2's are around the corner if the track conditions are right.

Love Nitro racing.

And in the words of Don Garlits Alcohol is for drinking, gasoline is for washing parts, Nitromethane is for racing.

I took this one a couple of years ago and it is for some reason one of my favorite drag photo for some reason.

This is just after the hit and you can see the the car in the far lane is all ready getting into the head gasket by the green flames.
But he was wheels up and moving by that point.

sweet928

[QUOTE=marlinspike;7666875]Whoa whoa whoa...an 8 series that was invisible? What the heck?????? That's borderline blasphemous.

Sad but It's true. I owned the 840 for 3 years. It was a great and complex machine. I enjoyed it but it was quite heavy and not fast. I sold it soon after a friend of mine took me off the line in his 5 speed VW. I think it was a GTI for g-d sake. No one ever noticed that car the way my 928 get's attention. And it's not just the vintage -- as I had two S4's back when they were still in production and it got more comments then both 911's, the SL500, 540Sport, the 840, all three Vette's. Only other car that attracted similar attention was the NSX. I loved the NSX in many ways but it had no soul.

Only one in my list that has it all, has been the 928. Not even the 911 comes close. Something about the 928 - for me - is up there with what I imagine it would be like to own a Miura. Something that is unique in all the world and utterly timeless.

gronkX

I remember at one of the Devek track days there was a 540 - I seem to think it had upgraded brakes, but was otherwise stock. My 928 did have fresh suspension upgrades, and had been corner balanced.

The 540 was a very close match for my '86.5 - the BMW pulled a way a bit in the straights, braking was probably around the same, but the 928 had better cornering. And he was probably a better driver than I was, so it would be an interesting race.

Erik N

Just explain that, even though his pink BMW may be a bit quicker than your car, that it takes a manly-man to pilot the 928. You don't have all that modern ABS, traction control, airbags, or stability electronics crap. Explain to your friend that the 928 was built by men who knew cars, for men who appreciate cars and who can drive them properly and deliberately, without all those girlie whiz-bangs to hold their hand. Tell him that your 928 is made from oily metal parts like gears and bolts and axles. Tell him that, sure, he has a nice BMW, and that you could even see your girlfriend/wife driving something like that. Especially in pink.

And then accelerate away in your smooth greased machine, while he ponders his decision.

See? You WIN!

blown 87

WHO is this guy?????????????????

I like him all ready.

Richter12x2

I have an '02 540i and an '85 928 with an x-pipe, air pump delete, electric fan, and Porken's chips. It's hard to compare because it's a different kind of power, the 4.4 doesn't have it down low like the Porsche 5.0L does, but my 928 would probably edge the BMW on a long enough road, I have a feeling it would be pretty close though.
An early 928 though, I hate to say it on this forum, but unless he's pretty bad, you MIGHT still be close enough after 1/4 mile to read his license plate, if your eyes are good.

Nightfly

300SL the original gull wing? Sure. But I don't know if you're ever going to see one. They're all in museums and rich guys multi car garages. You certainly won't see one in a parking lot anywhere. Same with the C111, you're simply never going to see one 'in the wild'. Yes, the new pagoda's are nice, so are the old ones, but they're pretty common, I don't think you'll see anyone finding them very interesting. The Bimmer 507? It's an ugly SOB. No one wants to look at it.
The 928, on the other hand, is a beautiful work of art, pretty rare, and looks like nothing else on the road. As Clarkson put it, yes, it was designed in the decade that style forgot, but it still looks good today. And that's something that you can't say about many cars designed about 40 years ago. Actually, only a handful of them. And the 928 is one of them.

pcarfan944

I own a 97' 540i/6 and have driven many 928 variants. The 540i would indeed leave your 928 in its wake, and the cars 0-60 isn't even it's strong suite; it really comes into it's own from 60-160. They'll accelerate from 0-150 in just a few ticks over thirty seconds. Just from looking at their power to weight ratios, they shouldn't be as fast as they are, but bmw got the gearing and torque curves just right and they're very underestimated. My biggest problem is with owners like your friend who give the rest of us a bad rap.