Bought the car with headers all the way back to a giant catback

[RandomFact314]

Originally Posted by Floordford

Please elaborate on that. How does driving a certain car make me stupid?

I guess he is pissed off you get better MPG in a stang than he does in that Infiniti

[Arragonis]

Could I get a quick translation. I think by headers you mean what we in the "old world" would call the manifold - the bit that connects the exhaust ports to the exhaust system and not a cylinder head ?

If so has the new "header" been matched to the ports in the head ?

Is the camshaft standard ?

Originally Posted by RandomFact314

... Also, with these new pipes, there is no o2 sensor hooked up so that concerned me too.

This would worry me for the open loop / closed loop, er, "thing"

Just trying to get everyone to discuss the car please. Some people have had good results with these and it would be a shame if Random didn't share results...

[Floordford]

Exhaust Manifold- the stock, cast metal exhaust component that channels exhaust gas from the engine into the exhaust system.
Exhaust Header- the aftermarket tubular exhaust component that channels exhaust gas from the engine into the exhaust system. Made in different configurations. Long tube style, shorty style which is usually a direct stock replacement, mid length style.

Basically a manifold is stock and a header is aftermarket.

[Mifunego]

In my experience and observations, exhaust mods can make notable performance/efficiency improvements in big displacement engines, or forced induction engines. Modded exhausts on little NA 4 bangers do little other than make more noise. I'd say do your neighbors a favor and put an actual muffler on there. The sound of an uncorked Honda exhaust makes fingernails on the blackboard sound positively pleasant in comparison.

[Arragonis]

Originally Posted by Mifunego

In my experience and observations, exhaust mods can make notable performance/efficiency improvements in big displacement engines, or forced induction engines. Modded exhausts on little NA 4 bangers do little other than make more noise. I'd say do your neighbors a favor and put an actual muffler on there. The sound of an uncorked Honda exhaust makes fingernails on the blackboard sound positively pleasant in comparison.

Not quite so cut and dried IMHO. On this side of the pond view people are fancy pants enough to own a big capacity engine car. A well designed exhaust "header" (aka Manifold) and system can realise some decent returns - sometimes double figure % in terms of HP. One just bought over the counter and bolted on probably won't have much if any difference.

Hence my questions on cams and matching.

But TBH swapping the exhaust for a standard one and making less noise will result in a far more relaxing and economical drive.

Kind of like playing easy listening instead of death metal...

[mcrews]

"as long as you dont do 3" piping on anything under 600hp you'll be fine."
this IS absolutely a very stupid thing to say.
It means that 2.75 is ok in ANYTHING under 600hp.
So....anything???????
like the little 4 banger the op has?????

No.
that is a stupid statement.

But then........you go on to say that "headers ALL THE WAY back" (now pay atterntion, I've blodded the key words) is the same as "Headers back". That is your second stupid statement.

Then you claim that what he said was " aftermarket header, aftermarket pipe, aftermarket muffler".
no. what he said was"HEADERS ALL THE WAY BACK TO A GAINT CATBACK"
pretty simple words. only 2 are multisyllable.

And your the only person on the face of the planet who thinks that ANYTHING about this entire aftermarket exhaust is "catback"

And now, the op admits that his description was incorrect.
And that's really ok.
And so is my calling attention to it.

But stupid is trying to lie about it.

And having owned:
1. A 66 Mustang w/ 200ci w/ Offenhauser 3 carb manifold (2 170s and 1 200 carbs), clifford headers, w/2" dual inlet & 1.75" daul outlet muffler runnung to GT tips, Shelby spec'ed front suspension.
2. 73 351Clevland/w 4 bbl carb bone stock
3. 79 Mustang Indiannaplois 500 PACE Car - Recaros, TRX Michillins, 2.2Liter turbo 4 banger Bone Stock
4. 66 Mustang w/200 ci w/ 250 head w/ 2bbl adaptor w/ clifford headers 4-2 -1 (2" pipe) to single inlet dual outlet muffler w/ gt tips
5. 2004 Mach 1 - bone stock

I have experienced enough mustang owners to be able to make the statement I made.
But let me help you.

Ford mustangs are built and designed for the bolt on crowd. ANYTHING can be bolted on and make improvements.
for example
2003 Mustang 4.6liter 280 cubic inches, 260hp tons of bolt-ons
2002 Infiniti Q45 4.5liter, 274 cubic inches, 340hp Very few bolt-ons

I didn't even have to look at the car you owned when you made that silly first statement.

[mcrews]

Originally Posted by Floordford

Exhaust Manifold- the stock, cast metal exhaust component that channels exhaust gas from the engine into the exhaust system.
Exhaust Header- the aftermarket tubular exhaust component that channels exhaust gas from the engine into the exhaust system. Made in different configurations. Long tube style, shorty style which is usually a direct stock replacement, mid length style.

Basically a manifold is stock and a header is aftermarket.

WRONG!!!!!!!!!!

Many cars come with factory headers........surprise!!!
example: Infiniti Q45
But you were kinda close in a guessing kinda way.

A header implies tubes to each exhaust port. usually equal length
a mainifold is usually cast metal. all ports tend to dump into one.

[Floordford]

You really are out to just contradict anything I say aren't you? Why did you even start posting in this thread? You've been nothing but a wet sock the whole time. I saw the OPs picture and realized what he was running. That's how I knew it was header to custom pipe to muffler. Headers back and headers all the way back is the same. Its admitted that there are headers. Then its admitted that there is a full exhaust system. Manifold back and header back is different.

Oh yeah you must have meant this Infinity Q45 exhaust manifold. 2002 INFINITI Q45 Left Exhaust Manifold
Man-i-fold! Not header
These are an example of long tube headers Holley Performance Products Ceramic Headers 32100FLT
Shorties Motorator Blog - Stainless Steel Shorty Headers for 2010 Camaro SS
Mid-length headers BRP Hot Rods: 1 5/8

So can we end this now grumpy gus?

[Arragonis]

Unsubscribing...

[jcfdillon]

if it helps to reduce back pressure, would it be fuel efficient to use a sound-insulated leaf blower that has been rebuilt with metal parts so that there is no danger of plastic melting and burning? otherwise, is there a better type of vacuum system for the tailpipe, such as a small high powered durable metal fan at the end of the tailpipe and muffler? might be better to place it before the muffler so that its sound is neutralized. something like a steel bladed oven fan made to stand up to high temperatures might be ideal. then it would be just a matter of testing the device at different fan RPMs, and see how the electric power consumption balances out with any mpg gains that might be possible. because this may vary at different engine RPMs it may require some kind of computer load balancing program to run it efficiently. please excuse me if this is a stupid idea or if it has already been tried. (i guess i would like to know if it is used somewhere and/or if it was tried and found useless.)