N/A Exhaust Manifolds - old vs new

[ste91]

I read somewhere that the older generation of 4EFE's, (the one found in the EP80) came with a 4-2-1 manifold instead of the 4-1 that we get on the EP91's.

What sort of difference would you get, I know with different manifolds you get more power at difference rev ranges, but I can't remember any of it, someone wanna shed some light?

Basically what I want to know is which one would be better for low end/mid range/top end.

And if they're both a straight swap.

thanks in advance

[Rich]

Generally Speaking 4-2-1 broaden the power range and 4-1 Increase top end.

But If you get a decently made 4-2-1 with long primaries and tapered collectors then you should get the best of both worlds

[ste91]

Ah nevermind then, I thought maybe it would be a cheap short term improvement, I think I'll just wait.

[nic1.3]

Generally Speaking 4-2-1 broaden the power range and 4-1 Increase top end.

But If you get a decently made 4-2-1 with long primaries and tapered collectors then you should get the best of both worlds

hey Rich

I understand what you mean by long primaries.......but what do you mean by tapered collectors???

sorry if this sounds stupid man.

nic

[Rich]

Basically say the first set of pipes out of the engine (primaries) collect into a slightly larger secondary and then the two secondarys collect into a larger collector which tapers down to smaller (same sizes as a secondary ? ) so it flows better.

[Sparky]

I have a standard 4-2-1 not sure if it will fit on my exhaust but I might try it one day

[ste91]

I have a standard 4-2-1 not sure if it will fit on my exhaust but I might try it one day

Do it

[Rich]

I have a standard 4-2-1 not sure if it will fit on my exhaust but I might try it one day

Aint you getting an FTE? I you are and wana get rid send it my way for free yeah? :D

[Sparky]

FTE in the summer mate

Wont hurt to try it, if it gives good gains you can give me a million pound for it