inlet manifold

Post by **fleurvan** » Fri Oct 10, 2008 10:36 am

Does anybody know of an inlet manifold for a SU 1\"1/4 HS2 carb i could use so i can put a branch exhaust manifold on

Post by **bmcecosse** » Fri Oct 10, 2008 4:25 pm

Yes - you simply cut the inlet section off the standard manifold - but be sure to cut into the exhaust section to leave the inlet useable. Many after-market manifolds too - for the original 1.25 carb although most will also take the larger 1.5" carb. Seems unusual to fit a 'branch' exhaust and retain the small carb - what are you hoping to achieve ??

Post by **fleurvan** » Mon Oct 13, 2008 10:49 am

Need new exhaust and thought it may give my van a bit more go but probably wrong

Post by **d_harris** » Mon Oct 13, 2008 12:23 pm

In all honesty inlet manifolds are so cheap and plentiful on ebay its foolish not to use them!

Post by **Peetee** » Mon Oct 13, 2008 12:28 pm

A change to a free flow exhaust manifold doesn't really create additional power till the revs rise above 4000rpm. A long time before that sort of revs the standard 1098 head and inlet system is strangling the engine so changes there are far more appropriate.

Post by **bmcecosse** » Mon Oct 13, 2008 4:16 pm

Well - on the Mini many companies claim 25% power increase by simply changing the carb needle, fitting a free-flow air filter - and fitting a 3 branch exhaust with straight through silencer. The so called 'stage 1 kit' - so there are gains to be had. But yes I agree - especially since the Minor has a pathetic wee carb as standard - that should be the first upgrade, with a good air filter, and then think about a head change followed by the exhaust changes. But - if you need an exhaust now - and plan the other changes in time, there is no harm upgrading as you plan. Just don't expect it to turn into a fire-breathing monster!

linearaudio · Post by **linearaudio** » Mon Oct 13, 2008 6:47 pm

A thought thats been wiggling around in the recesses of the grey matter for a while- what effect in the first instance of just replacing the original silencer with a (sleeved down) RC40 box. Anyone tried that? After the bigger carb/ better inlet/head stage, that is.

Post by **d_harris** » Mon Oct 13, 2008 7:06 pm

Matt's trav runs a full RC40 Exhaust with a few subtle mods to suit the minor. Might be worth a PM?

Incidentally, the mod is an over axle piece. Available from JLH

linearaudio · Post by **linearaudio** » Mon Oct 13, 2008 7:17 pm

Aah-Haa. Sounds good! Thanks for that

Hold on, I'm a bit green here though- Matt who?

Post by **d_harris** » Mon Oct 13, 2008 7:31 pm

Matt

tis his real name and also his forum name!

Post by **Matt** » Mon Oct 13, 2008 7:33 pm

Me

Got an LCB, with a small (about 4") piece of pipe welded to the end. I then have a mini side exit rc 40, with an over axle bend and a piece of straight pipe I got from JLH. Great exhuast but its not easy to stop it hitting the floor!

Not a wonderful pic, but it might gove you the idea

linearaudio · Post by **linearaudio** » Mon Oct 13, 2008 8:56 pm

Lovely job. Mini section looks like it was made for the moggy! Thanks for the info, now got to save up for a roller so I can fit it

Post by **Matt** » Mon Oct 13, 2008 9:14 pm

I fitted it the right way up ;)