25-10-13, 06:36 AM
If you change your exhaust headers make sure the restrictor point of the new set is similar in overall opening size to the original set. [/size]The original outlet measured: [/size] [/size]35mm (narrowest point) to 43.5mm (widest point) externally at its most restricted point.
[/size]I’m not sure what the wall thickness is but I reckon it must be somewhere between 1.0mm and 2.00mm, my original pipes are still in good condition and I was loathe to saw them up to find out.
[/size]In any event the Motad replacement header system outlet pipe is has a clear open area of 1364sqm.[/size] [/size]Whereas the original outlet is restricted to somewhere between 962sqm and 1075sqm.
[/size]When I fitted the Motad headers the power band almost evaporated and a gas analyser showed it be running far too weak, this being supported by the plug colour.
[/size]A further test was done by a lazer temp gauge on the exhaust clamp bracket of both original and new pipes and this showed the exhaust gas temp had risen.
[/size]To solve the issue the Motad pipe was sleeved down first to 1075sqm which improved things no end, and finally down to 975sqm, which seemed to be better.
[/size]Plugs were checked and exhaust gas analysed and the results were as good as I could get them.
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[/size]I’m not sure what the wall thickness is but I reckon it must be somewhere between 1.0mm and 2.00mm, my original pipes are still in good condition and I was loathe to saw them up to find out.
[/size]In any event the Motad replacement header system outlet pipe is has a clear open area of 1364sqm.[/size] [/size]Whereas the original outlet is restricted to somewhere between 962sqm and 1075sqm.
[/size]When I fitted the Motad headers the power band almost evaporated and a gas analyser showed it be running far too weak, this being supported by the plug colour.
[/size]A further test was done by a lazer temp gauge on the exhaust clamp bracket of both original and new pipes and this showed the exhaust gas temp had risen.
[/size]To solve the issue the Motad pipe was sleeved down first to 1075sqm which improved things no end, and finally down to 975sqm, which seemed to be better.
[/size]Plugs were checked and exhaust gas analysed and the results were as good as I could get them.
[/size]
[/size]