Precats

[spid]

Thinking of removing my precats, I,ve been reading up on the theads and there is talk of reverse cones. Anyone got any more info on them?
Are they needed?
Dimensions so I can make some or pictures.

[2 sheds]

The non reversal cones keep the gas speed higher and prevent reverse pulses, they do make a difference , better noise as well
Tim

[spid]

2 sheds said:

The non reversal cones keep the gas speed higher and prevent reverse pulses, they do make a difference , better noise as well Tim

Any chance of some dimensions so I can so I can wizz a couple off on my Laser?

[2 sheds]

You need a cone down to say 2 1/2 inches diameter, i hope you're only making these for yourself or i'll send the boys round.
Tim

[Podie]

2 sheds said:

You need a cone down to say 2 1/2 inches diameter, i hope you're only making these for yourself or i'll send the boys round. Tim

Well send 'em round after you've sorted out my Samco hoses…

[spid]

2 sheds said:

You need a cone down to say 2 1/2 inches diameter, i hope you're only making these for yourself or i'll send the boys round. Tim

Thanks Tim
I owe you one.
If you need anything cut give me a shout
Adam

[2 sheds]

Thanks for the offer, i may have some business for you, especially as you are in Sussex

Tim

[Nano2nd]

sorry to hijack your thread mate, but Tim whats the exchange procedure for your manifolds?

[2 sheds]

Nano2nd said:

sorry to hijack your thread mate, but Tim whats the exchange procedure for your manifolds?

I have prepared ones available in advance so you just return the old ones later,
Tim

[pink-fever]

sorry but what are cones ?

[victormeldrew]

You get ice cream in them. Sugar one are nice.

Actually I'm interested too. I presume the cone fits inside the precat chamber and makes for a smooth transition from 4 header pipes down into the one in pipe out to the man cat. I have the factory uncatted headers on mine (so I still have the originals with cats to swap back if needed). I'm wondering if these would be coned? Same applies to the main cat chamber - I have the factory no-cat part, is this coned and should it be?

>> Edited by victormeldrew on Monday 9th August 11:06