You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!!
SVTJohnPerformance wise I do not have any flow specs but they are 3-1 headers that have a 2.25" collector that replace the 99+ logs that have a 2" collector, the size of the primaries are on the front page. Common math tells your that the performance gain is going to be worth it.
Lando7886You can just have a shop modify a GT X-pipe for you with 2.25" flanges and the correct angle for the headers. My shop did mine for $70
TOKIV6Sent you a PM about that, hope it helped, if you want paste what I said in here so others can see it.
crashLOL Thanks man, but im not on enough or know enough to be a legend
cobra232WOW I havent run by those yet but I will keep my eyes open now and buy the first set I find to take pics and measurments for everyone.
MantaDreamsThanks And you are very correct, thats why its always best to try to find an inspection station that might have a rep of not lifting the car, there is one here in Springfield Mo. that I go to. As soon as I go home to California I have to get cats. I think I may have mentioned that it is a good idea to keep all stock exhaust componants just for inspection and smog reasons. Also California police check for smog equipment almost all of the time if they suspect other mods to your car.
I also mention in the PM that I sent that deleting the EGR isnt a good idea, its best just to keep it.
In the PM I mentioned that I muscled the 2000 EGR tube to work with the 94-97 headers that I used (Mine were 1996 headers to be exact.)
Sorry that I havnt been on much, lots of work at home and work
Here is a video of my exhaust without mufflers. The sound quality isnt great but you get an idea. This was taken with a small digital cam. You can see the stock muffler on there still but not connected, that was for inspection purposes. I also have another stock Y-Pipe that I can switch over to when I go back home to cali, I also have 4 hi-flow cats I can weld in too So I have a few options.
This video was to show that the exhaust can sound good but for the most part is annoying. Also the reason for the light smoke at the end is because I still need a wideband dyno tune. It was tuned for about 25hp less than what it can make just to be on the safe side.
It idles at 750, the first rev was 1400rpms, 2nd was 2000, third was 3000 and the 4th was 5000rpms.
RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!!
Even though the 94-98's are larger their 3 primaries all get squashed down into the 2 1/4in collector where as the 99-04's each dump directly into the 2 inch pipe with no loss of diamater. Makes me wonder if the older ones might actualy flow less.
RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!!
Quote:
ORIGINAL: MustangMike2001
Even though the 94-98's are larger their 3 primaries all get squashed down into the 2 1/4in collector where as the 99-04's each dump directly into the 2 inch pipe with no loss of diamater. Makes me wonder if the older ones might actualy flow less.
no they flow more than 99+, but not alot better on NA cars. on FI cars they are alot better and withstand the heat better as the 99+ log style manifolds are known to crack on stock setups letalone performance setups.
the power difference between the 2 on even a full bolt-on cammed with ported heads and intakes would only be about 5hp in favor of the 94-98's and even that would be pushing it.
2.25" collector is more than enough size for 3 cylinders to feed. there is no cramping down of flow withthe 94-98 header. they are actually well oversized for a stock engine and that is why you don't see any gains from aftermarket shorties even with a blower. LT's help the torque and scavenging to add more hp on top. the old 5.0 had horrible stock headers and that is why they see better gains with them than 3.8 guys
__________________
current mods
98 3.8L 11psi P1SC Procharger,97 junkyard engine ,3.73`s,7.5 Detroit Truetrac,TA rear girdle,B&M shift kit,2500 stall
mods to complete
8.5:1 ross .030" pistons,Eagle H-Beam 351W rods,Comp cam 224/236 .569"/.578" 112* lobe sep,Rhodes variable duration roller lifters,Pro-M Univer MAF,siemens deka 60lb injectors, upgrade to D1@20psi,Delk Main Girdle and Main studs, Head studs,Comp 1.7 roller rockers, home ported heads CFM 216/196,PI 3500 stall
RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!!
That's good news. I was just looking at one of the headers the other day while I had it off the car and noticed how the tubes were squashed together and it made me wonder a little.
RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!!
Did anyone else have issues with the passengers side header coming in contact with the motor mount? It took me forever to figure out why that side wouldn't seal to the head and it turned out the tube for cyl #1 comes in contact with the mount. I had to cut a notch the bracket with an angle grinder to get it to fit in.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!!
