Anyone know if this will fit a rhd 2.8

[Sajk]

Dinan D760-0321B Dinan Cold Air Intake - 1996-1999 BMW 3-Series

Dinan High Flow Cold Air Intake Systems develop horsepower and torque gains by improving the engine's intake airflow. The aggressive system design provides for a less restrictive intake airflow than the stock system for greater engine efficiency and the lowest possible intake air temperatures...

www.dinancars.com

I know it won't make power.

Cheers

 

[Mike Fishwick]

You would be better off having the ECU remapped, but if you just want to make a noise, fit a K&N panel filter - it is quicker, cheaper, and easier to install, but remember that there are several compelling reasons to avoid these toys. In either case, remember that any filter drawing warm air from under the bonnet will reduce power, no matter how much noise it makes. You would be better off making up a cold air intake as per my bit in the tech section.

 

[Sajk]

Hi Mike, this one goes down into the bumper. I have a remap and a panel filter. Now if I could just find rhd headers..

 

[Mike Fishwick]

What do you mean by 'Headers?' In Americanese this means the intake pipes between the manifold and the head. I cannot think of anything on the intake system which would be different on LHD, as the steering column is lower than the manifold. If in doubt, check on a parts list such as RealOEM.

Make sure that your new intake does not use the small hole behind the headlamp, which I bet is sized to reduce top end. I eventually used 70 mm drain pipe all the way, which approximates to the bore of the airflow sensor.

 

[t-tony]

As I understand the American term headers refers to the branch exhaust manifolds which attach to the cylinder head. Hence “headers”.

Tony.

 

[Sajk]

As I understand the American term headers refers to the branch exhaust manifolds which attach to the cylinder head. Hence “headers”.

Tony.

In Australia they are called extractors, in South Africa branches, in America headers.

It is reasonably > 99% certain that lhd items do not fit. Probably the mist expensive are supersprint (italian) are specifically made in RHD or lhd. Of course the RHD ones are twice the price. The ones below are euro 2365.00. Outrageous.

Headers (Right Hand Drive) Stainless steel for BMW Z3 Roadster 2.3i, Headers (Right Hand Drive) Stainless steel

Headers (Right Hand Drive) Stainless steel for BMW Z3 Roadster 2.3i, Headers (Right Hand Drive) Stainless steel

www.supersprint.com

Another source is here

BMW Z3 RHD Extractors

BMW Z3 Exhaust Extractors! Fits e36/7 Roadster Z3 2.8L Guaranteed Power Increase! Stainless Steel! 3 Year Warranty! Email for other BMW Exhausts!

www.motorsportsdownunder.com

Aur 2200. Also outrageous.

There are any amount of supersprint replicas and either short tube or long tube ones available on eBay for around USD 150. All exclusively LHD and various levels of quality. Decent pipes that use the exhaust pulses to pull through more charge can add power in a specific range. Hence the manifolds on S54 looking the way they do.

Anyway rhd seems impossible. I don't know what does not fit.

 

[Lee]

Dinan D760-0321B Dinan Cold Air Intake - 1996-1999 BMW 3-Series

Dinan High Flow Cold Air Intake Systems develop horsepower and torque gains by improving the engine's intake airflow. The aggressive system design provides for a less restrictive intake airflow than the stock system for greater engine efficiency and the lowest possible intake air temperatures...

www.dinancars.com

I know it won't make power.

Cheers

In a word yes, long as the routing is good and keeps the heat away.

We proved a few years ago on a dyno these cold air intakes do give up to 5bhp, not huge or noticable but the noise will be worth it.

 

[Sajk]

Thanks Lee

 

[Mike Fishwick]

Right - I'm with you now! Must be a sign of old age . . . The Supersprint exhaust manifold is a work of art, but I would bet it is not unknown for their long unsupported pipes to fracture - and they would only give of their best when used in conjunction with S54 or 3 litre camshafts. With standard cams the difference would probably be discernable, but not vast, so do not lose any sleep over it.

I wonder how an M52tu 2.8 engine would respond to the use of a 3 litre exhaust system behind the catalytic converters - which seperates the exhaust groups all the way through? If you want a pleasant noise, this would be the answer, as the 2.2 and 3 litre engines really do have that 'six cylinder' exhaust note which is lacking on the other models.

 

[Sajk]

I am tossing up having headers made with a custom exhaust and either hI flow cats or decat with some little mufflers where they currently are.

I will take a look at the diff between the 2.8 and 3.0 system

 

[Mike Fishwick]

If you are in a civilised country, remember that removing the catalytic converters will be an MoT failure, as is a more noisy exhaust. Why to people want to make more noise - as well as making you a target for the police, it only makes you deaf! There is more to fast driving than just sounding fast . . .

 

[Mike Fishwick]

If you are in a civilised country, remember that removing the catalytic converters will be an MoT failure, as is a more noisy exhaust. Why people want to make more noise - as well as making you a target for the police, it only makes you deaf! There is more to fast driving than just sounding fast . . .

 

[Lee]

I am tossing up having headers made with a custom exhaust and either hI flow cats or decat with some little mufflers where they currently are.

I will take a look at the diff between the 2.8 and 3.0 system

Both use similar systems, one has cats on the manifiolds 2.2 & 3.0 (headers) other half way down the car some twin some single cat.

Your on the right track, larger inlet manifold with a 6 branch exhaust manifold sees really good gains on the dyno over on Zpost they've done this a few times with 10-15bhp increase.

 

[Sajk]

Mine has no cats in the manifolds. Those seem to be in the U.S only. There are two under the car. Good to hear this is the right approach. With he tune, cams and manifold I can achieve published stock 2.8 acceleration times at sea level and at my altitude I am about 18% down on power so much have made up about that.

@Mike. It's a point of contention between the exhaust builder and I. He wants me to fit the exhaust that was an option in countries that did not have cats back in the day. Instead two small mufflers are fitted where the cats are located. We don't have emmissions testing or "mot" type testing here. We probably should but we dont. At any rate the other thing I have said is that it cannot be any louder than it is now with just the back box replaced with a free flow unit.

I will probably go for hi flow cats. I am led to believe that since 1999 the technology has become less restrictive.