TheNeedForZ Posted September 7, 2007 Share Posted September 7, 2007 How good are they at preventing exhaust backflow at low rpm? I am looking for a comparo in which an engine with long-duration cam, smaller LCA is tested(in other words, a lot of overlap) with regular headers and anti-reversion headers. How much do they cost compared to regular headers without anti-reversion cones? Who makes/sells them? Thanks Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 8, 2007 Share Posted September 8, 2007 no one makes them ,that I know of currently but thats hardly a problem they DO work, but your unlikely to notice UNLESS youve got a dyno and can tune fairly well http://store.summitracing.com/partdetail.asp?autofilter=1&part=FLO%2DR3025&N=700+115&autoview=sku slip these inside a junction between a 3" collector and a 3" exhaust, its generally good for a few extra low rpm ft lbs (smaller exit down stream) but tuning the total collector length and dia. is critical to success the idea is to speed up the exhaust flow exiting the collector and making reverse flow hit a lip that tends to disrupt the pulse slightly the exhaust port restricters like this tend to kill high rpm flow in my experiance Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.