merge collectors

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Re: merge collectors [Re: Tig] #1676616 09/25/14 05:18 PM 09/25/14 05:18 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: We swapped out some home built, crappy mild steel 2 1/4 with 4 inch collector for some custom, $2500, Stainless, 2 1/4 equal(ish) length with 4 inch merge collectors. Et's and MPH never changed a bit but they sure looked a lot better Thats the time about headers and the merge collectors.. it has to be matched to the engine and the rpm that it will be at MOST of the time... I did header work at Chrysler for about 15 years and near the end I was playing with merge collectors... but the merge coll wants to be in a certain rpm range most of the time.. thats why the pro stocks use them.. they dont vary a ton in rpm like a lot of other engines... I put about 40 hours into merge collectors on the dyno to come up with a formula but I never really got there

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