TR220 112 lsa vs TR220 114 lsa
11-01-2005, 11:34 AM
#51
Getting back to the original discussion, I have a question in regards to what would be considered a free flowing exhaust. Local race engine builders that I've spoken with have basically said that unless you're running open headers, you *generally* want a little more exhaust duration. (I'm sure that other variables can change this generalization...if this thread has taught me anything it's that cam selection isn't cut and dry, there's alot to consider)
Would it be safe to say that anything with cats involved would respond better to a split duration with less overlap...even high flow cats (like the StainlessWorks set-up comes with)? Or are there other ways around that with a single pattern cam?
Would it be safe to say that anything with cats involved would respond better to a split duration with less overlap...even high flow cats (like the StainlessWorks set-up comes with)? Or are there other ways around that with a single pattern cam?
11-01-2005, 01:32 PM
#52
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in my opinion any backpressure, such as cats or a chambered muffler VS straight pipes and straight through muffler, would warrant a split pattern cam.
11-01-2005, 04:17 PM
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Getting back to the original discussion, I have a question in regards to what would be considered a free flowing exhaust. Local race engine builders that I've spoken with have basically said that unless you're running open headers, you *generally* want a little more exhaust duration. (I'm sure that other variables can change this generalization...if this thread has taught me anything it's that cam selection isn't cut and dry, there's alot to consider)
Would it be safe to say that anything with cats involved would respond better to a split duration with less overlap...even high flow cats (like the StainlessWorks set-up comes with)? Or are there other ways around that with a single pattern cam?
11-01-2005, 04:53 PM
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Originally Posted by bluecajun5.3
my a/f ratio was showing around 12.2 @ wot. and between 14 and 15 when slowly excellerating on the dyno. how good is this? don't know too much about a/f ratio. thanks... lance
....................did I? 
11-01-2005, 07:19 PM
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so who makes a split pattern cam that is around the 220 range? futral is all too big, the only thunder racing split is 224/227 which i think is also too big, i cant find any comp ones in the same range and crane is the same story.
thanks
jerome
thanks
jerome