LCB

[tysonn]

Could some knowledgeable person please identify this manifold and explain what would be needed to fit it to my 1275 ragtop.Presently has the bog standard steel system.I noticed that the pipes go virtually straight down vertically whereas the existing arrangement inclines away from the engine as it goes downwards.[frame][/frame]

[philthehill]

It sounds as though you have a LCB from a MG Midget/Sprite and which hugs the engine block. The LCB for the Minor follows the same tract as the standard exhaust system as it exits the engine bay. There is not enough space between the block and the chassis leg for the MG Midget/Sprite LCB without cutting away metal either on the manifold or chassis leg.
A photo of what you have would be helpful.

[bmcecosse]

LCB is really for a developed engine - with a 'long' camshaft fitted. It will not show any gain on a standard engine. Better with a simple '3 branch' . The Minor ones slant back through the 'porthole' in the bulkhead. I think most of the 'usual suspects' will sell you one if you really must.....

[philthehill]

Tyson
As suspected it is a MG Midget/Sprite LCB.
Better to sell it and buy a proper Minor LCB/3 branch.

[tysonn]

Fair comment.OK then whats the best LCB and system I could get?Mild steel or stainless?Can anyone recommend a supplier?
Mick.

[tysonn]

Bear in mind the history of my car.It was bought as an "unfinished project" a couple of years ago.After all the problems I have had and great expense to put them right(which I will probably document on the forum as a warning to anyone thinking about buying a similar project) I'm just about there and want to finish it correctly.Its just come back from Tomroy who had the engine out to correct the oil gusher from the rear oil thrower.He (and my pal that runs a garage locally)said that the engine was rebuilt with a "hotter" cam(their words not mine).Without taking it apart to look I have no idea what cam this is.The car certainly shifts although as expected is a bit lumpy at idle.It has an HS4 carb.I plan to take it to Bogg Brothers who are a well known tuning outfit nearby with a rolling road to get it all setup in the best possible way.I thought possibly if I were to add a LCB and system that this would be best done beforehand. I can understand any advice of "why bother if its just a road car" but the cam and carb were there before I bought the car so apart from more expense reverting to an original 1098 etc I may as well carry on.

[philthehill]

If you want the best get a MANIFLOW lcb manifold and system. Not cheap but good!!!
see:
http://www.maniflow.co.uk/index.php?vie ... tegory=141
for the various options available.

[tysonn]

So this?
http://www.maniflow.co.uk/index.php?vie ... oduct=1498

[philthehill]

For your engine (with unknown cam) it would be a good system when including the manifold.
I have MANIFLOW inlet and exhaust manifolds fitted on my engine and I consider them to be the best. MANIFLOW exhaust manifolds and exhaust systems are fitted to many road and competition cars.

[bmcecosse]

Since you can't safely REV a 1098 engine - I advise against spending all that money on an exhaust that is intended for a modified/high revving engine..... But it's your cash - and certainly Maniflo have a v good reputation.
Does the engine at least have a crankshaft damper fitted?

[tysonn]

Dunno whether this is sufficient:[frame][/frame]

[philthehill]

From your photo - YES it does have a crankshaft damper.

[tysonn]

Thanks Phil.I'll order the full set up tomorrow.
Mick

[bmcecosse]

Yes - that's the thing - ESSENTIAL on any hard driven 1098 - actually on ANY hard driven A series......

[tysonn]

Its a 1275 Roy.

[bmcecosse]

Oh - sorry - I must have confused it with another thread ..... It's standard on a 1275.

[picky]

I can also highly recommend the manifold LCB manifold and exhaust system for performance, huge improvement BUT it is incredibly loud, think modern motorbike type loud! You will end up being very light on the throttle and changing gear early just to stop the noise!

Also it no longer sounds like a Morris Minor, I personally like the funny noise that the Morris Minor exhaust makes, very distinctive. I ended up going back to the standard system (probably a bit too small diameter for a 1275 though)

[bmcecosse]

Come on Picky - fix the master cylinder!

[picky]

True it has taken me far too long to fix that! New cylinder is actually in place but not started the dreaded brake bleeding yet.

[tysonn]

Well I'll be able to judge for myself shortly as I've ordered the Maniflow full system.