6 replies to this topic

[Pickwah]

Currently have a cooper freeflow that was on my 1275 mg metro spec engine.

That same 1275 is now 1330 with a large valve gasflowed head, same mg cam and hif44.

Am I right in thinking the cooper freeflow mani is getting slightly restrictive and an LCB be a better option (medium bore)

Whats your thoughts guys, freeflow or LCB?

[Dusky]

Id keep the freeflow on a road car.

[Minigman]

Everyone shouts LCB for a big bore and freeflow for small bore, but I ran a freeflow on my last 1310 and it produced more torque than with a LCB. I think a few people have also found this out too.

[hhhh]

Everyone shouts LCB for a big bore and freeflow for small bore, but I ran a freeflow on my last 1310 and it produced more torque than with a LCB. I think a few people have also found this out too.

What was the rest of the spec, cam, exhaust pipe diameter etc.? Thanks.

[Minigman]

276 cam with a std MG Metro larger valve 12G940. Balanced bits and lightened flywheel. Was a few years back but pretty sure that was it. It did have a 286 in it initially but I hated it and swapped it out for a 276. Will go 266 next time I do a big bore engine.

[Cooperman]

For a 1275 engine a freeflow will be best if the normal working revs are between 2500 and 5000 rpm.
For engines aiming for top end power at around 6000 rpm and higher an lcb works best.
With a freeflow the exhaust pipe diameter should be 1.625" internal, whilst an lcb needs 1.75" I/D.

[Mrpeanut]

I ran a freeflow plus maniflow rcm exhaust with a 1330, minispares evo 1 cam and a very good head. It went very, very well and wasn't held back by the manifold at all.