Straight Pipes & Headers

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04-05-2005, 12:52 AM

#11

Mustang Novice

1st Gear Member

Join Date: Feb 2005

Posts: 98

RE: Straight Pipes & Headers

Thanks Whitey.

I was looking at MAC and couldn't find any dimensions. Plus I don't have my car yet, so I'm having to take everyone's word for it for now.

MAC & JBA are the only long tube I've seen. I saw shorties on the Ford Racing Parts site.

04-05-2005, 03:15 AM

#12

n4ggs

2nd Gear Member

Join Date: Apr 2005

Location:

Posts: 181

RE: Straight Pipes & Headers

Quote:

ORIGINAL: Cruz97GT05

Short tube headers are simply an improvement in diameter and air flow over the stock exhaust manifold to produce more power. Long tubes while having the same advantage also have an eaqual length per tube. As the cylinders fire in sequence it takes more time for the first one to fire and reach the collector at the end of the manifold than the last wich is why the tube for the first cylinder is the longest. This causes pressure to pull the gasses out of the rest of the cylinders after th first one has fired equalling more power.

if you don't intend to lower your car go with the long tubes, if you have sespension mods in mind, go with the shorties. Stick with ceramic coated, they last longer.

this is all completly wrong
this guy has no idea what he is talking about.

the legnth of the primaries has no bearing on the diameter or the flow. long tube headers dont necessarily have equall legnth runners, some shorty headers do. cylinder scaviging is the most important aspect of header design, the momentum of the air leaving the cylinder pulls in air thru the intake valve when the valves are overlapped (both intake and exhaust open) and this effect is confined to a certain rpm band. headers with short primaries tend to do this at higher rpm while longer tubes do it down low. long tubes will have no/next to no difference in ground clearance. ceramics will last longer, but main feature is they keep the underhood temps down.