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Discussion Starter #1 (Edited by Moderator)
My previous bm was the e34 (5 series) 525i with vanos (m50 engine) was auto and
considering what a heavy beast it was - it f-ing shifted man!

was wondering on my drive home today what is the throttle response and torque like on a manual 325 e36 like?

it must be rapid as such a big engine in a tiny car.

also which is the better one to go for the vanos or non vanos is there any differences in performance btw em?

thanks

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Only the very early (1991) 2.5 M50 engines are non-vanos and give around 188HP. From 1992 onwards the 2.5 M50 had VANOS raising it to 192HP.

After 1996 the M50 was dropped and replaced by the M52 VANOS engines, the 2.5 giving 170HP and the 2.8 giving 193HP. It is possible to derestrict the M52 2.5 by swapping the inlet manifold for a M50 one.

So for best power you want a post 1992 325 M50 or a post 1996 328 M52.
 

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Discussion Starter #4
Only the very early (1991) 2.5 M50 engines are non-vanos and give around 188HP. From 1992 onwards the 2.5 M50 had VANOS raising it to 192HP.

After 1996 the M50 was dropped and replaced by the M52 VANOS engines, the 2.5 giving 170HP and the 2.8 giving 193HP. It is possible to derestrict the M52 2.5 by swapping the inlet manifold for a M50 one.

So for best power you want a post 1992 325 M50 or a post 1996 328 M52.
thanks but whats the point of the 328 as the engine size is bigger than the 2.5 and only 1 hp more! lol! does it have more torque than the 325?
 

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For track cars, the non vanos, the torque is high up the rev range making it more sporty at higher rpms, but for real world driving, the vanos one.

The upside is also they will be younger and cleaner, and also the vanos engine was updated along with the front shock design.
Pre-vanos cars can struggle to get front shocks unless the topmounts are converted to the later spec. Not a big problem, it doesn't add much onto the cost of replacing shocks and topmounts to get the top spring plate and various washers, but it can be something to look out for if you are planning uprated suspension.
 

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Only the very early (1991) 2.5 M50 engines are non-vanos and give around 188HP. From 1992 onwards the 2.5 M50 had VANOS raising it to 192HP.

After 1996 the M50 was dropped and replaced by the M52 VANOS engines, the 2.5 giving 170HP and the 2.8 giving 193HP. It is possible to derestrict the M52 2.5 by swapping the inlet manifold for a M50 one.

So for best power you want a post 1992 325 M50 or a post 1996 328 M52.
Is the 170 BHP 2.5 the one found in the 323? Was there a 325 with lowly horses? Just asking as I have no idea
 

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Is the 170 BHP 2.5 the one found in the 323? Was there a 325 with lowly horses? Just asking as I have no idea
Not in an e36, but there is some wrong data out there, I've seen a couple of places quote the 188 figure, which matches a very rare BMW 324 CKD.
 

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The 325 is about the same power as a standard 328.
1bhp less but with a few simple mods ie chip from EndTuning,CAI you'll get a 325 with quite a bit more BHP than a stock 328...Then again a few simple mods and you'll get a lot more out of a stock 328......If I was getting a 328 I would make sure it doesn't have a Nikasil block in it
 

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1bhp less
Thats why I said 'about' as I can never remember if it's 1bhp more or 1bhp less :lol

I'd always go for a 328, because as you say, if your prepared to do abit of work and spend a couple of quid, you can get some decent power out of them - Where as, on the 325, realistically, the only option you've got is a remap.
 

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My Non-vanos 2.5 made 218bhp on the rollers with a few choice mods. The Vanos 2.5 is a little smoother at idle, the non vanos somehow sounds more old skool through the rev range. I have driven loads of them over the years I have looked after E36's and you can hardly feel the difference between the 2 when you drive them. Being a mechanic I would pick the Non-vanos everytime because there is less to go wrong. :hihi

You wont be dissapointed with either though.....:thumbsup
 

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My Non-vanos 2.5 made 218bhp on the rollers with a few choice mods. The Vanos 2.5 is a little smoother at idle, the non vanos somehow sounds more old skool through the rev range. I have driven loads of them over the years I have looked after E36's and you can hardly feel the difference between the 2 when you drive them. Being a mechanic I would pick the Non-vanos everytime because there is less to go wrong. :hihi

You wont be dissapointed with either though.....:thumbsup
Pah!
You'll be well versed in all this soon :hihi

Back on topic though and I think I'd go for the youngest e36 I could find, and if you want a 2.5 that will be a vanos engined car.
The early 325i vanos engines were slightly different to the later 325i vanos engines; the later ones had a diaphragm spring in the vanos to quieten them down as the early ones tended to rattle. Mine is an early vanos (being a 94) and I can hear a slight rattle. The seals are prone to wear too, so with all that in mind a complete vanos re-build will benefit most cars imo.
You have to remember that they are all getting on a bit now and wear and tear will start to affect them all at some point.
 
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