Engine change,

[NZ00Z3]

A super charger would be an easier way to get some more HP out of your M52TUB20. Here's a package that available in New Zealand. I'm sure there will be supplier in the UK that offer a similar package.
http://www.trademe.co.nz/motors/car-parts-accessories/bmw/engines/auction-1174041102.htm

The other cheaper options are:
- Fit a M54B25 inlet manifold. You will need an adaptor plate to reuse your throttle body. A M54B30 manifold would have very limited improvement over the M54B25 on a 2.0 L engine.
- Change the VANOS seals to ensure the valve timing is correct
- Fit better designed headers, exhaust and high flow cats, or cat delete (depending on your smog testing laws)
- Clear engine adaptions and drive the car so the DME sets it self up for the engine breathing changes.
- If you really what to, Dyno tune and DME remap to optimise the engine breathing changes you've made and the DISA valve switching point

This will give you an improvement in performance and would provide the right platform for the super charger to fit on top of.

 

[windym]

Super chargers on a 2.0 would be a waste of time and money. They take so much hp from the engine to start with.

Andy

 

[Sean d]

A super charger would be an easier way to get some more HP out of your M52TUB20. Here's a package that available in New Zealand. I'm sure there will be supplier in the UK that offer a similar package.
http://www.trademe.co.nz/motors/car-parts-accessories/bmw/engines/auction-1174041102.htm

The other cheaper options are:
- Fit a M54B25 inlet manifold. You will need an adaptor plate to reuse your throttle body. A M54B30 manifold would have very limited improvement over the M54B25 on a 2.0 L engine.
- Change the VANOS seals to ensure the valve timing is correct
- Fit better designed headers, exhaust and high flow cats, or cat delete (depending on your smog testing laws)
- Clear engine adaptions and drive the car so the DME sets it self up for the engine breathing changes.
- If you really what to, Dyno tune and DME remap to optimise the engine breathing changes you've made and the DISA valve switching point

This will give you an improvement in performance and would provide the right platform for the super charger to fit on top of.

Thanks for the detailed info, what improvement would I gain from fitting the M54B25 manifold, I will be getting the VANOS seals done over the winter period. @Murray Wall

 

[NZ00Z3]

I have not been able to find and dyno results to answer your question backed with data.

Results from my reading.

The mod increases the air flow to the engine:
- Removes Manifold tube shape restrictions. M52TUB20 manifold tubes are oval in shape. The M54B25 are "D" shaped and match the shape of the ports in the M52TUB20 head.
https://www.google.co.nz/url?sa=i&r...L17zMMylTmLoivZLZlEXWKcg&ust=1476224895609765

- Shorter ram tubes. When the DISA switches (around 3,500 rpm) and the manifold uses only the ram tubes, the M54B25 has shorter tubes.

Reported results are:
- No real improvement noticeable under 3,000 rpm
- Engine rev's freer and hits red line faster above 4,000 rpm.

 

[Mac Romans]

I don't know how much of a rush you're in but I may be having a heart (engine) transplant over winter. If I do it'll make my 3.0 engine, gearbox, ECU and loom could all be available.....

 

[Grumps]

I don't know how much of a rush you're in but I may be having a heart (engine) transplant over winter. If I do it'll make my 3.0 engine, gearbox, ECU and loom could all be available.....

???

 

[Mac Romans]

???

An S54 may be coming up from a trusted source so I'm considering silencing the ///M police once and for all!