Mini Carb...

Post by **Kevin** » Fri Feb 18, 2005 3:33 pm

Best inlet manifold is the alloy MG Metro one

Oselli or Howley is better, and the 1.3/4" SU as you say only really comes into its own on a tuned 1275cc anything else works fine with a 1.1/5" SU and will not really be disadvantaged until above 70mph with a standard 1275.

Post by **bmcecosse** » Fri Feb 18, 2005 4:04 pm

Oh I agree about the Oselli/Howley manifold - and next time I see one on ebay for £2 be sure I will buy it !! My last two MG alloy ones cost exactly that - £ 2 each. With a half round file the corner inside the big hole has been modified extensively - and the runners carefully opened to match the big port head. I doubt the O/H manifolds will be much better now !! And of course P/T - all the elements need to be matched to get good air flow - although a small carb (1.5") running into a big manifold (1.75") will be ok. It's when the size decreases that problems occur.

Post by **Peetee** » Fri Feb 18, 2005 9:43 pm

With a half round file

I can thouroughly recommend a 'Dremmel' type high speed drill. I have one by Hobbycraft, it cost me a tenner and came with loads of different heads. With another £5 I bought another grinding head suitable for working my cylinder head. It's great fun.

Post by **bmcecosse** » Sat Feb 19, 2005 7:47 pm

The Dremmels I have seen and used are far too small for any serious head work.

Post by **Peetee** » Sun Feb 20, 2005 12:42 am

The Dremmels I have seen and used are far too small for any serious head work.

Have you ever tried to use one on a cylinder head? I can assure you that with the right grinding bits they do a very good job. I have deshrouded the valves and inlets around the valve stem on my 202 head following patterns set out in Vizards 'bible'.

Post by **picky** » Fri Feb 25, 2005 10:07 pm

I agree with Peetee, I have a similar tool that I have used on cylinder heads, manifolds and carbs. The tool bits may not last very long, but If you want very professional results then you would be better off buying a cylinder head ready modified by professional tuning company.

Post by **Peetee** » Fri Feb 25, 2005 10:29 pm

you would be better off buying a cylinder head ready modified by professional tuning company

Indeed, but part of the cost of these things comes down to the time spent polishing it to a mirror finish - a totally unnecessary indulgance.
If you are stuck to fill the hours during the winter months I can really recommend having ago at DIY cylinder head mods. I have really enjoyed it despite the fact that the head I was going to use has proved useless because it was cracked

. It just means that the next time I have a go I will really know how to do it well.