Dr. Boost
I was wondering what rpm the non-vanos M50 valvetrain is good for. I realize stock hydraulic lifters begin to collapse over a certain rpm as well.
97 M3 - 8.94@164 - 8 sec street machine, all BMW driveline, factory ECU
02 M3 - 9.74@145 - Maximum PSI stage 2 turbo kit, stock motor, factory ECU
16 M3 - 9.3@151 - Built motor/twins
15 M3 - 9.2@162 - Built motor/single turbo/Ecutek
BMW SOB's turbo E30 - 8.72@158.39
follow our latest builds and upcoming events! - facebook.com/maximumpsi - instagram.com/maximumpsi
Member
Probably somewhere around 7300 or so. 7250 is a safe redline.
Rob - 2000 BMW Z3 M Roadster | 1986 Porsche 944 5.3L LM4
Dr. Boost
Thanks for the educated guess. I hope to be turning more than that.
The S52 head/valvetrain is good for 7k+. By the looks of the M50's double valve springs I was figuring this head was good for even more rpm. I need to find the seat pressure of the M50NV springs vs the S52.
97 M3 - 8.94@164 - 8 sec street machine, all BMW driveline, factory ECU
02 M3 - 9.74@145 - Maximum PSI stage 2 turbo kit, stock motor, factory ECU
16 M3 - 9.3@151 - Built motor/twins
15 M3 - 9.2@162 - Built motor/single turbo/Ecutek
BMW SOB's turbo E30 - 8.72@158.39
follow our latest builds and upcoming events! - facebook.com/maximumpsi - instagram.com/maximumpsi
996whp 2.8 and climbing
7500 with a 7700 revlimiterwith good spring pressure
996WHP 2.8 and going nowhere fast
. e36 4Dr with A/C and leather seats in U.S.
www.bmwturbo328.com 9.93@152.6
Dr. Boost
Ulysses, where is this info from? Stock dual springs? Stock m50 non-vanos cams?
97 M3 - 8.94@164 - 8 sec street machine, all BMW driveline, factory ECU
02 M3 - 9.74@145 - Maximum PSI stage 2 turbo kit, stock motor, factory ECU
16 M3 - 9.3@151 - Built motor/twins
15 M3 - 9.2@162 - Built motor/single turbo/Ecutek
BMW SOB's turbo E30 - 8.72@158.39
follow our latest builds and upcoming events! - facebook.com/maximumpsi - instagram.com/maximumpsi
996whp 2.8 and climbing
Just my hypothesis
996WHP 2.8 and going nowhere fast
. e36 4Dr with A/C and leather seats in U.S.
www.bmwturbo328.com 9.93@152.6
License Revoked
Try giving Bimmerworld or VAC a call, Im pretty sure they would know.
Member
well I money shifted mine on the weekend.. no bent valves.. but a few of the lifters are gone. And I probably hit around 7900-8000 rpm.
Senior Member
I'd guess up to 8,000 rpms. Damn lucky m50 non-vanos owners.
Current: 95 M3 Turbo | 08 335i
Dr. Boost
From the looks of your car list you have a M50 Vanos, which has different valve springs.Originally Posted by bensonious
well I money shifted mine on the weekend.. no bent valves.. but a few of the lifters are gone. And I probably hit around 7900-8000 rpm.
97 M3 - 8.94@164 - 8 sec street machine, all BMW driveline, factory ECU
02 M3 - 9.74@145 - Maximum PSI stage 2 turbo kit, stock motor, factory ECU
16 M3 - 9.3@151 - Built motor/twins
15 M3 - 9.2@162 - Built motor/single turbo/Ecutek
BMW SOB's turbo E30 - 8.72@158.39
follow our latest builds and upcoming events! - facebook.com/maximumpsi - instagram.com/maximumpsi
Member
Sorry.. missed the "non" part.
Member
Mike, when you find out, that would definately help my case. With all my studies though, The safe RPM I have been told by a few is 7250.
Rob - 2000 BMW Z3 M Roadster | 1986 Porsche 944 5.3L LM4
Member
Custom solid lifters ftw?
95 M3, 5.3 LS, PTE 7675CEA, TH400/Gear Vendors OD
10.4@136 Pump gas at 3530lbs.
Build thread
http://www.bimmerforums.com/forum/sh...LS-Turbo-build
Someday...
I know the fellas @ EDGE motorworks in CA pushed their N-VANOS Auto-x car to 7500 on a regular basis.
Dr. Boost
Notice I didn't ask what the lifters were good forCustom solid lifters ftw?
97 M3 - 8.94@164 - 8 sec street machine, all BMW driveline, factory ECU
02 M3 - 9.74@145 - Maximum PSI stage 2 turbo kit, stock motor, factory ECU
16 M3 - 9.3@151 - Built motor/twins
15 M3 - 9.2@162 - Built motor/single turbo/Ecutek
BMW SOB's turbo E30 - 8.72@158.39
follow our latest builds and upcoming events! - facebook.com/maximumpsi - instagram.com/maximumpsi
Member
from what i have read (although i do intend to experience it some day) is that the non-vanos can hold safely to around 8k in stock form. i've read it in a couple different places too, but i cant remember where. again, i dont know this as being a fact though, or even how long it would hold up going that high.
License Revoked
So Mike, does this mean you are shooting for higher RPM? If so, that will make me even happier to see your end results
Member
8000rpm with stock springs.
9.42@155mph
Member
What about lifters? Would we be forced into using solid lifters?
Rob - 2000 BMW Z3 M Roadster | 1986 Porsche 944 5.3L LM4
Killer of cars
whats wrong with soild valvetrain hey - works just fine on the M10 :P
when you pull up next to something with a set of solid rockers/lifters, you know there is something going on
License Revoked
The only downside to solid lifters is the adjustment, right? (I'm very very new to engine building parts, so please go easy on me here!)
needs a new motor :(
x2
-Curt
stock CR 92 non-vanos 325 / first ever Holset HY35 powered BMW / custom tubular manifold & motor mount / stock DME tuning / tial 50mm bov / 46mm xspower w.g./ green top injectors / IC piping designed by myself (above subframe of course)
/ 12x28x3" IC / oil return into pan that seems to work / e21 tranny mounts / custom blow through MAF / koni sport kit / 18x8.5 mvr replica's / various leaks & body colours
Member
Stock lifters and 8000rpm works great.
needs a new motor :(
So I can rev my 92 non vanos m50 to 8000rpms with NO modifications to the head? Is this still safe with boost? Thanks.
-Curt
stock CR 92 non-vanos 325 / first ever Holset HY35 powered BMW / custom tubular manifold & motor mount / stock DME tuning / tial 50mm bov / 46mm xspower w.g.
Member
8000 rpm and 2 bar and 750hp is tested.
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