another exhaust query

**alex g** · 24-07-2006, 09:44 PM

am going to build an exhaust manifold for the 16v i need a little help in the runner diameter??i am going to go 4 to2 to 2somewhere under the car, a nice long system, i need help in which diameter tubing????

thanks

**gotrice** · 25-07-2006, 03:53 PM

Just use the same size as the exhasyt ports in the head and you cant go wrong.

**alex g** · 25-07-2006, 06:29 PM

yer good point i throught of that today

err duhh

**finemk1** · 25-07-2006, 07:26 PM

be carefull of your gear lever when your measuring it up on the car, be sure to have the gears in 1st and 2nd making sure it dosnt hit the extractors/exsaust, its a pain when you have to take a angle grinder to your newly made extrators...
2inch pipe is probably the most commonly used..

**alex g** · 25-07-2006, 08:28 PM

cable change

**finemk1** · 25-07-2006, 08:40 PM

oopss Mk2......... timmy!! no probs then

**alex g** · 25-07-2006, 08:52 PM

no its a mk1

**twin eng, twin turbs** · 16-08-2006, 11:01 PM

If your interested i made some extractors to suit a 1.8 16v in a mk1, i havn't used them at all, they are 1.6mm wall thickness mild steel mandrel bent 4-2-1with two flexable joints and go into a 2 1/2" collector. I have a stainless 2 1/2" system to go with it...