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Workshop => Engine and Bottom End => Topic started by: supernutt on August 04, 2013, 04:36:53 PM

Title: Exhaust flange size
Post by: supernutt on August 04, 2013, 04:36:53 PM

I got a aluminum exhaust flange when I bought my TRX5 pipe from ESR.  The problem that I have is that it is smaller than the exhaust port on the cylinder. I have a couple other aluminum flanges laying around and they are all about the same size[ATTACH=CONFIG]1194[/ATTACH] as the exhaust ports what would these be used for?  It seems that even the stock exhaust flange is bigger than this one[ATTACH=CONFIG]1195[/ATTACH]

Title: Exhaust flange size
Post by: matt250r21 on August 04, 2013, 04:51:37 PM

ESR has different internal diameter flanges, smaller diameter is suppose to help with lowend. They have stock diameter as well, not sure if they make a larger internal diameter flange, but I have scene a stock flange bored out 1mm over stock.

Title: Exhaust flange size
Post by: supernutt on August 04, 2013, 04:53:08 PM

They never asked or gave me a choice

Title: Exhaust flange size
Post by: Pumashine on August 04, 2013, 06:41:39 PM

The stock exhaust port is 1.740 tall and 1.800 wide. Some builders take that out to 1.860 wide. I have a stock flange here bored out to 1.860 which is 3mm over. You might want to ask ESR about what matt250r21 is saying about the different sizes and why?