I bought some MR HEADERS and now it seems like it's running richer??

 

MR headers? The header on the MR and Standard IX are the same.....

 

I think that he means Megan Racing Headers. I have those headers on my car and they have always been leaking. At first i thought that they were warped or something but it turns out that they were always missing a weld in the middle section. I dont think that they should make ur car run richer. Do u have a air/fuel gauge?

 

Its a manifold, we don't have headers.

 

That's incorrect too:

head·er /ˈhɛdər/Pronunciation Key - Show Spelled Pronunciation[hed-er]Pronunciation Key - Show IPA Pronunciation
–noun 1.a person or thing that removes or puts a head on something. 2.a reaping machine that cuts off and gathers only the heads of the grain. 3.a chamber to which the ends of a number of tubes are connected so that water or steam may pass freely from one tube to the other. 4.Automotive. an exhaust manifold. 5.Building Trades. a.a brick or stone laid in a wall or the like so that its shorter ends are exposed or parallel to the surface. Compare stretcher (def. 5). b.a framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters. 6.Informal. a plunge or dive headfirst, as into water: He stumbled and took a header into the ditch. 7.Soccer. a pass or shot made by heading the ball. 8.a sign that is part of or attached to the top of a rack displaying merchandise. 9.Computers. a line of information placed at the top of a page for purposes of identification.




Thank you for playing though, we have some lovely parting gifts for you.

 

hmm I dont know how you could tell if it is running richer, unless you have a wideband??? anyways though go get your stocker ported and put that back on...

 

how does it "seem" like it's running richer?

 

You didnt use the turbo housing gasket that came with the manifold did you?

 

I have a wideband... @26 psi it reads 9.9A/F.... With 100 octane,,
I'll take them off and do some runs with the stocker back on,,,,

 

Should lean you out a bit, more flow means more air means leaner afr. Tune it before something breaks.

 

9.9 holy god get a tune.

 

not possible to run 26psi and have AFRs in the 9s. get your wideband checked...

ss manifold should make you run leaner if it indeed improves flow

 

my wideband doesnt even go to 9

 

Not necessarily. It does improve flow, but that may move it into higher load table in the map, and if you have looked at the stock map it gets richer as load increases. Therefore more flow = more load = more fuel. I noticed this as well when installed a header on my car. I leaned it out and picked up some noticeable power. Not much of a gain until I pulled some fuel out though

 

that manifold could be sending you into a load range that is way off(tune wise). This would cause you to have a rich condition because you are simply running in a load range that you are not tuned for.

By rights, if your boost didn't increase and all else stayed the same, you should notice a bit faster spool and would run a little leaner AFR's. The decrease in backpressure would be the biggest contributing factor. The less restrictive the manifold is(and everything else after it...i.e. turbine section, o2 housing, TBE.) the more this lean condition is pronounced.


CJ