6 replies to this topic

[functionjunction]

hello, im new to this forum and i was wanting to get some info on exahust manifolds for my mk1 cooper s (1275). i have recently bought a new set of twin su's 1 1/4" complete with heat sheild. the problem that i have is that the heat sheild interfere with the exaust manifold (nearest to radiator). i am currently cetting some custom heatsheilds made up but i am aslo considering replacing my exahust manifold (and possibly inlet manifold) as both are quite old etc.

can anyone suggest what exaust and inlet manifold i should be looking at that will fit below the heatsheilds and possibly improve performance?

mark

[Silicon Skum]

hello, im new to this forum and i was wanting to get some info on exahust manifolds for my mk1 cooper s (1275). i have recently bought a new set of twin su's 1 1/4" complete with heat sheild. the problem that i have is that the heat sheild interfere with the exaust manifold (nearest to radiator). i am currently cetting some custom heatsheilds made up but i am aslo considering replacing my exahust manifold (and possibly inlet manifold) as both are quite old etc.

can anyone suggest what exaust and inlet manifold i should be looking at that will fit below the heatsheilds and possibly improve performance?

mark

Hi there, and welcome to the forum.

Can I ask what ask what engine you have (bog standard 1275, Cooper 1275, Metro etc), and are the twin carbs for looks / period mod, or for performance?
Because if you are looking for better performance, you are prolly better off with a single, larger carb size of about 1.75" (HIF 38 or 44 depending on state of tune) rather than twins. As for the exhaust fanymold, an LCB would be a good improvement over standard. The inlet fanymold might be OK, but a Mini Spares alloy inlet or a metro inlet, depending on available space, would be a nice improvement over standard (assuming thats what you have?).

Others may be able to offer better / more detailed advice for your needs. Some one will be allong shortly

SS

[functionjunction]

hello, im new to this forum and i was wanting to get some info on exahust manifolds for my mk1 cooper s (1275). i have recently bought a new set of twin su's 1 1/4" complete with heat sheild. the problem that i have is that the heat sheild interfere with the exaust manifold (nearest to radiator). i am currently cetting some custom heatsheilds made up but i am aslo considering replacing my exahust manifold (and possibly inlet manifold) as both are quite old etc.

can anyone suggest what exaust and inlet manifold i should be looking at that will fit below the heatsheilds and possibly improve performance?

mark

Hi there, and welcome to the forum.

Can I ask what ask what engine you have (bog standard 1275, Cooper 1275, Metro etc), and are the twin carbs for looks / period mod, or for performance?
Because if you are looking for better performance, you are prolly better off with a single, larger carb size of about 1.75" (HIF 38 or 44 depending on state of tune) rather than twins. As for the exhaust fanymold, an LCB would be a good improvement over standard. The inlet fanymold might be OK, but a Mini Spares alloy inlet or a metro inlet, depending on available space, would be a nice improvement over standard (assuming thats what you have?).

Others may be able to offer better / more detailed advice for your needs. Some one will be allong shortly

SS

as far as i know it is a cooper 1275 not a metro or anything. i bought the twins to replace my existing set of twin h4's (really worn) basically i didnt want to replace the inlet manifold - i thought that i could swap the h2s's and all would be fine, but basically the heatsheilds dont fit with the exhaust manifold that i have, and i can only assume that i have an odd exhaust manifold??? how could i tell if the manifold that you suggested (LCB) will fit ???

[functionjunction]

as far as i know it is a cooper 1275 not a metro or anything. i bought the twins to replace my existing set of twin h4's (really worn) basically i didnt want to replace the inlet manifold - i thought that i could swap the h2s's and all would be fine, but basically the heatsheilds dont fit with the exhaust manifold that i have, and i can only assume that i have an odd exhaust manifold??? how could i tell if the manifold that you suggested (LCB) will fit ???

[TOMMO0302]

I would give a mini spares company a quick call, tell them what you have, what you want and ask whether that should fit or not to be honest.

Have you any pics of exactly where the problem is?

[Jammy]

Moved to Tech....

[taffy1967]

I'd contact Maniflow because their experts when it comes to exhausts and manifolds and can even make up special systems to suit if required.

Maniflow Link