Exhausts

[Jefftav]

Hi all,

What is the best exhaust to use on the 1275 marina engine. I have a lcb manifold and a twin outlet manifold off a metro but wondered what the best options are.

The engine is a standard 1275, I start work early and I do have neighbours that don't like to be woken at 5.30am so it needs to be nothing too loud. If I can retain the original morris fart on gearchznges and overun all the better but thsi is not essential.

Thanks for your help in advance, Jeff

[Peetee]

The twin box large bore system would be the right size for both options you state. It is available in both options from most Morris parts suppliers although last time I looked they were out of stock.
This exhaust system doesn't retain the fart of the standard system and is a bit noisier at all revs. You will notice this in the car and so will your neighbours if you start the car in an enclosed driveway or garage .
To run a standard size system you will need a standard manifold or one from a 1000cc mini which will allow you to run a carb larger than 1.25" - unless you are prepared to cut the inlet section off - but this exhaust will almost certainly restrict your engine.
JLH was researching interest in a new product recently. A large bore, quiet exhaust system. You could try contacting Johnathon to see if he can help out yet.

[bmcecosse]

I would go with the lcb Jeff - and make up a system from that to the rear. If you want it quiet - just don't rev it up! Seriously - you could fit twin silencers which would make it quiet enough. The twin outlet manifold will be difficult to get front pipes to match up - unless you get a Mini twin outlet system and butcher it. The Ital also had the twin outlet manifold - dunno if Ital exhausts are readily available and how much work it will be to modify for Minor use.

[linearaudio]

I'm presently "engineering" a mini/metro twin pipe manifold, as a) I'm a cheapskate, and b) I want to keep things quietish and it seems the fabricated manifolds get a bit noisier. It started when one of those light bulbs illuminated and I realised that the twin outlets of the cast manifold accept the moggy pipe diameter(with a flanged spigot from the mini pipe welded on), and the outlet positions were not THAT different from the moggy manifold. Hence I am butchering two moggy downpipes into a collector box feeding into a mini RC40 system a la "Matt". Not quite got it done yet, but looking very do-able, and the headers won't then be massively too big for a 1098!

[bmcecosse]

Good idea! Let's see some pics LA when it's done !
Now -why did I give away that spare front pipe a few months ago??????????