BMW 325 With Vanos VS 325 no Vanos - Page 2

///BimmerPower · #16 (**permalink**) 10-06-2003, 09:49 AM

Quote:

Originally posted by Stu Mc

The hot cam setup for non-VANOS engines is to put the intake cam in place of the exhaust cam, and buy the Schrick 252 non-VANOS intake cam. Now you have M3 durations with similar lift.

Stu, I am very interested in learning more on the hot cam setup for the m50 non-vanos engine. What are the advantages of m3 durations and lift? Also, what can be expected of installing intake cams in place of the exhaust cams and installing a schrick 252? Would there be a significant increase in hp/tq? Sorry for the novice questions, but this seems like an engine modification I can go through with. Thanks

Stu Mc · #17 (**permalink**) 10-06-2003, 01:07 PM

'91 and '91 non-VANOS engines both have 240/240 cams. They have identicle dual=spring valvetrain as well.

'93-'95 325i/525i has cylindrical valvetrain, while M3's have conical valvetrain.

You cannot put VANOS cams in a non-VANOS motor, and vice versa.

To have hot cams on a non-VANOS, remove both cams. Put the stock INTAKE cam (240*) in place of the exhaust cam. The reason for doing this is because, even though both of the stock cams are 240*, the intake has higher lift (9.7 vs. 9.0), so you want the 9.7 lift cam as the exhaust cam. Buy 1 Schrick 252* intake cam so that you have a 252/240 setup with high lift on both.

fuuukaiai · #18 (**permalink**) 10-06-2003, 02:32 PM

the big question is what kind of hp/tq would you make with the hot cams?

Stu Mc · #19 (**permalink**) 10-06-2003, 03:45 PM

Quote:

Originally posted by fuuukaiai
the big question is what kind of hp/tq would you make with the hot cams?

325's/328's with M3 cams put anywhere from 180-210 to the wheels, it all depends on other factors: engine condition, other mods, what kind of dyno, atmospheric conditions...

fuuukaiai · #20 (**permalink**) 10-06-2003, 03:56 PM

thats pretty decent, but what would the non vanos M50 make with the exhaust/schrick cam install? lets say the engine has intake and exhaust and is running well.

p.s. what do we make at the wheels stock?

ken06 · #21 (**permalink**) 10-06-2003, 04:17 PM

So, which have we agreed upon to be better, Vanos or non-vanos? And how much do M3 cams cost?

Stu Mc · #22 (**permalink**) 10-07-2003, 08:02 AM

Quote:

Originally posted by fuuukaiai
thats pretty decent, but what would the non vanos M50 make with the exhaust/schrick cam install? lets say the engine has intake and exhaust and is running well.

p.s. what do we make at the wheels stock?

Since the Schrick/non-VANOS setup has the same cam durations and lift as M3 cams, I'd say we already have that covered.

About 190 at the wheels.