Provide reasons, not opinions.
Provide reasons, not opinions.
Major Contributor
I would say that anything that is low compression and a strong bottom end would be great.
The M50 has a superior head with dual cam.
The V8 would be too complex to turbocharge with two manifold
The M30 is bulletproof with forged pistons.
A lot of M50 or M30 are being super and turbocharged. Even in stock form without any mods to the bottom end.
If really depends what is the ultimate goal.
'85 Euro 635csi Race Turbo, megasquirt, Group A
'92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
'02 Subaru WRX Wagon with STI springs, bigger sway bars
Big, Big Time Poster
A non vanos engine will not change the cam timing at a higher rpm, this can effect the turbo when vanos hits and the exhaust and therefore intake characteristics change. The more consistent the exhaust from the engine the more consistent the turbo, the more efficiently it will work. This is in an aftermarket set up. You could, and I'm sure people have, get Vanos and turbos to work, but most systems are half assed and don't account for the effect that vanos has.Originally Posted by clevertd
Conforti chip, K&N filter, Racing-dyn sways, EBC pad/rotor, SS brakelines, UUC DSSR, custom sound+alpine receiver, 17" PS2s, H&R/bilsports.
"Speed is the product of doing everything right"
VaNOS turns on/off at different RPM dependent on load and temperature. For peak numbers? Sure, I could see the NV route, but there is more power under the curve and better driveability when VaNOS is used. There are many people out there that tune VaNOS and are easily contacted. There is NO reason to half ass a turbo system, if you do, you've got bigger problems.
This will help: http://forums.bimmerforums.com/forum...d.php?t=944487
Big, Big Time Poster
People half ass them all the time to save money(just look on ebay)! I'm not saying half ass the system. I'm saying that most people will not consider that vanos will effect the turbo. A non-Vanos engine will be easier to tune w/ cams and easier to produce a more predictable boost due to the consistency of the power curve. Unless you tune the Vanos (which I bet more then 50% of people who turbo there BMW do NOT) then I think it is pointless to get a vanos motor. I've seen m50 non vanos engines w/ low boost produce over 400hp
Good thread!
In the thread both my and your points are proven!
Vanos=good for street
Non-Vanos=better for track
Last edited by healtoeit; 11-19-2008 at 06:51 PM.
Conforti chip, K&N filter, Racing-dyn sways, EBC pad/rotor, SS brakelines, UUC DSSR, custom sound+alpine receiver, 17" PS2s, H&R/bilsports.
"Speed is the product of doing everything right"
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