Hi, I've looked in google as well as in BF's search but I can find what I'm looking for. What is the rev limit for the S50 B30?
Thanks

Are you talking about the stock rev limit?

If you are, the stock rev limit is set at 7200 RPM.

Cheers!

What are the max revs with a chip?

mine does 8000rpm, there is a guy here with motec and Ti rods etc that runs it to 9200rpm...

mine does 8000rpm, there is a guy here with motec and Ti rods etc that runs it to 9200rpm...

Just motec and rods? 3L? No shim under setup? What will a 3.2 spin to?

Just motec and rods? 3L? No shim under setup? What will a 3.2 spin to?
it is fully built, I think 3.1 litre, Ti valvetrain etc, supposed to be safe to 12,000, but not making power over 9500, so limiter is set to 9200, car is a race car, but he recently did a road trip of ~2000 (Qld to Tasmania if you want to look on a map) miles and return...with at least 1 race meeting on the way to destination

i've seen a S50B32 which is completely stock, (only remap) spin to 8800rpm many times, still running strong

it is fully built, I think 3.1 litre, Ti valvetrain etc, supposed to be safe to 12,000, but not making power over 9500, so limiter is set to 9200, car is a race car, but he recently did a road trip of ~2000 (Qld to Tasmania if you want to look on a map) miles and return...with at least 1 race meeting on the way to destination

Wow, that's ridiculous, but awesome. :D

I've done 8600 on my old car but that made me a little nervous lol :D

When we were doing the map for my car the tuner asked me where I wanted it. I said 7.000 since I dont really need more revs :D But I know the engine can handle much more than stock 7.200

and i have set mine to a measley 8000....If i can raise the redline safely beyond 8000 the required boost gets lower and lower for more power:lol

Stock valvetrain and eric is revvin 8800 just over 1000 over stock, alan is hitting 8000 which is 800rpm over stock, maybe i will go somewhere inbetween just to be safe, say, 8300 or so.

Anyone else have any input for what they have been running and for how long?

mine does 7 800 at ~0.5bar; stock cylinder head.
have a look at this movie: http://www.youtube.com/watch?v=4j8aL9e9Fx8
m3 gt from my friend's garage which is in sweden. revs at 8 800. schrick camshafts, carbon airbox, custom tuned stock ECU, fully-prepared cylinder head (titan retainers with motorsport springs), lighter flywheel.

oh that sounds so sick!!!! now with my exhaust, you wont be able to tell the difference from a gsxr1100 damn.......nice

Be careful with the stock 3.0 liter engine if you take it to higher rpm.

The 3.2 is slightly set up to be better suited to the higher rpm with its lighter intake valves and slimmer shims all around.

A very well known engine builder shared his concerns about going to 8K with a S50B30. No name but think of the king of M50 engine building from about 5 years ago.... arguably still the best with NA inline 6 engine building, and reputed to be darn close to 450 HP NA S54....

S50B32 safe to 8K all day long.

If you go higher than these rpm, you're seriously risking longevity of spring package in the cylinder head.

Alex.

So change the springs, simple enough.

OK... maybe I wasn't clear enough.

When I meant spring package, I meant springs, retainers, tappets etc to go to titanium and light weight and stronger springs. If one were to look up prices for commonly available parts for this aspect alone in conversion you'd see its not an inconsequential expense. At least not to most people.

Alex.

OK... maybe I wasn't clear enough.

When I meant spring package, I meant springs, retainers, tappets etc to go to titanium and light weight and stronger springs. If one were to look up prices for commonly available parts for this aspect alone in conversion you'd see its not an inconsequential expense. At least not to most people.

Alex.

So what kind of revs can you get out of a B32 head set up for BMW CCA Prepared class rules? With which cams are you seeing the best results?

I'm thinking about making the jump to CR at the end of this year or beginning of next and I don't think I've got enough power with a stock B32 to be competitive with prepared E46 M3's, particularly with being forced to carry 3200 lbs. vs. their 3278.

Thanks.

I'm not an expert with the rules.

If you're allowed to swap cams, use an airbox instead of the stock plenum, and change the computer programming then there is no reason you could not expect to see 370+ HP depending on other minimal changes and the rules.

That is at the crank. On a similar, not exact, version of my last engine we saw 330 at the rear wheels. 276 is a common quote for stock rear wheel hp on the euro 3.2

I'm not an expert with the rules.

If you're allowed to swap cams, use an airbox instead of the stock plenum, and change the computer programming then there is no reason you could not expect to see 370+ HP depending on other minimal changes and the rules.

That is at the crank. On a similar, not exact, version of my last engine we saw 330 at the rear wheels. 276 is a common quote for stock rear wheel hp on the euro 3.2

Cams, valves and springs are free. Retainers must be same material and at least the same weight as stock. Plenum/airbox are also free, but non-stock ECU and Alpha-N programming are specifically forbidden, so that limits going to a CF airbox, correct?

Injectors are also free... are you using stock injectors or upgraded? If upgrades, what (and for that matter, where would Ifind them)? Also, throttle bodies are free... any options there?

Thanks.

Mine exS50B30@ ca.1bar of boost. Totally stock, with modified (lower CR) stock pistons did 8 500rpm. Whole two days at racetrack. Than pistons let go. Nothing wrong with head, no valve hitting piston noticed.

oops :P

Mine exS50B30@ ca.1bar of boost. Totally stock, with modified (lower CR) stock pistons did 8 500rpm. Whole two days at racetrack. Than pistons let go. Nothing wrong with head, no valve hitting piston noticed.

Not sure this is a good data reference point for people with stock pistons. If you've decreased CR, then you may well have given yourself quite a bit more clearance to allow (inadvertantly) for valve float at higher rpm, and if thats the case you wouldn't appreciate that the springs were not keeping up at that rpm.

just a related topic, whats a reasonable redline set for the S50B32, as im getting the DME reflashed again soon. My hard cutout is set to 7800 currently.

There are refrences from 8000 to 8500. i was thinking midway between.