323i cam in 325i

[gstuning]

323i´s make max power at 6000rpm but that can atribute to other then the cam it self,

i.e diffrence manifold size or exhaust headers

[MR 325]

So we have come to the conclusion that the 323 cam is in fact just a bit "hotter" than the 325i cam.

Thanks guys for the help, mainly you Charlie for researching it for me.

[trent]

So we have come to the conclusion that the 323 cam is in fact just a bit "hotter" than the 325i cam.

Thanks guys for the help, mainly you Charlie for researching it for me.

Well, this has really sparked my interest -- longer duration doesn't make for a "hotter" camshaft.

Since the durations are not THAT different, I would be more interested in the difference in lift between the cams. The problem I have here, is that the Euro 323 motor was much higher compression than the US 325. The 323 has less stroke than the US 325i. However, the 323 was still a fairly torquey motor. I would almost think that while the 323 camshaft has longer duration, the lift is not as large as the US 325 which would offer more mid-range torque but still pull decently up top and ultimately make the smaller 2.3 engine feel faster. The higher compession of the Euro 323i would make up for loosing top end with the less lift.

This is just something to think about, compression plays highly into designing camshaft profiles and ramp angles. So bringin this crap to a close the 323 camshaft may not work as good as most think in the lower compression US 325i engine. I may be wrong, just something to think about.

EDIT: What I am saying basically is this is just theory. MR 325 you should measure the lift of the 323 cam and compare it to the 325 cam. Yes 1mm would make a difference.

[Bunta]

Ask the webmaster of www.e30.de
if the 323cams make the 325 more powerful he certainly knows about it...

[Stu]

The 325i cam is 264 duration, I don't know the specs on the 323i cam.

[MR 325]

Man, my head in spinning...

[mikeedler]

I have my Hanes manual here in front of me and I still dont know why you all claim the euro models had a higher CR this is a euro manual and the CR for the E21 323 is9.5:1 and the E30 323 is 9.8:1 and the E30 325 has a CR of 9.7:1 It also shows the cam lift of the 323 is 6.5009 to 6.6609 mm or 0.2559 to 0.2622 in. all the part numbers are the same for both engines in the ETM euro or not for the motor. for the 325i.

[Digitalwave]

US E30 325i's had 8.8:1, 325e's had 9.0:1.

[BavarianBimmer]

Isn't there an oil line journey difference :?