Before Exhuast mod.few questions

[unknown007]

To people who do mods instead of keeping everything STOCK!!!

So i was talking to some guy about removing my exhaust straight from the headers and running straight pipes.Well of course people say it sounds like crap but i was going to unbolt the exhaust from the headers to see what it sounds like first.Anyways long story cut short he says if i changed anything on my exhaust like redo it or put straight pipes he said i have to re-tune my car,it'll lose HP,lose torque,and major loss of gas mileage is that true?

Any idea what sounds better straight pipes from I'm guessing cats or straight pipes from headers?Or what would be best?I was deep roaring sound.

Tomorrow i was going to remove suitcase, but before i do theres something i need to know.Before unbolting the pipes that go with the suitcase what do i do with that circle object attached to the driver side bolts?Can i still drive the car i do the muffler delete and have the same gas mileage as i did when i had the muffler?

Let me know before i do it in the morning thanks.


Modified by unknown007 at 5:11 AM 7/29/2008

[Rex]

In short, you shouldn't see a significant change in anything but noise, but IMHO you do not want "just straight pipes", some type of muffler should be utilized.

Sounds like he's a believer in "back pressure", and that without it, your car won't run "right". Well, that's a politics and religion conversation, b/c those that believe one thing will most likely never let their minds be changed.

My opinion is you can see improvements by tunning (air & fuel changes required) both the "in bound" and "out bound" air flow. That's why you hear (and some claim feel/see) changes/improvements by opening up the intake from an air flow standpoint.

The stock (designed) exhaust is a compromise of performance and sound. Keep in mind this is a luxury car that recorded the lowest in cabin sound levels at 70 mph of any car in its day.

[elwesso]

I still think the best exhaust modification you can do if you want a nice sound is to cut the resonators out and put a muffler in the back replacing the suitcase.

[jarred15801]

Cut off from the cats back(cut off suitcase and both resonators). run straight piping from there. i suppose you could throw in a muffler if you wanted to but thats more money and its only going to bring the sound level nearly back to stock again.

[maxnix]

i suppose you could throw in a muffler if you wanted to but thats more money and its only going to bring the sound level nearly back to stock again.

Which is not bad, as completely removing CAI and exhaust impediments will net you maybe 6 HP if engine is in top shape (far more important).

Many would be well served to read Q45tech's prevouos posts about his exhaust experiments, the compromises they induced, and why he returned to stock.

It is already faster than a Mustang 3 valve SOHC V8, why make it sound like one? If it's not faster, you need to spend some time on your car and some funds on a NICO ECU. If you need the "sound", get some external speakers and play the Ferrari V8 CD. Much better!

[DrewQ45]

To people who do mods instead of keeping everything STOCK!!!

So i was talking to some guy about removing my exhaust straight from the headers and running straight pipes.Modified by unknown007 at 5:11 AM 7/29/2008

If you do that, you eliminate the cats and your car wont pass inspection. Not only will it probably fail on the exhuast test, when they put a mirror under your car, they'll fail u on the spot.

[unknown007]

Cutting the resonators and removing cats?I rather pass smog on the spot.But doing a muffler delete don't you think that's easier at least for now?

Again what do i do with the round circle thing on the driver side bolt?the one thats next to the pipes that go to the suitcase?

wouldn't it be easier to just run pipes from where the suitcase hooks up?Can i drive without the suitcase for now and have no problems?

Just want to hear the V8 not trying to keep it quiet and dont want to lose mileage removing the suitcase but i;m going to find that one thread.

[jimbyjimb]

Simple suitcase removal changes nothing except noise level. If you want the car to sound really nice and lose or gain no performance it is the BEST option since it is very cheap to remove and the stock mufflers already sound like a Flowmaster.

[unknown007]

Simple suitcase removal changes nothing except noise level. If you want the car to sound really nice and lose or gain no performance it is the BEST option since it is very cheap to remove and the stock mufflers already sound like a Flowmaster.

Ok i have to now since my U-bolt or whatever broke.Its so rusty.Can i drive it like that?with noithing happening to the engine?

One more thing how can i remove the rust bolts?they are completly stuck.
Modified by unknown007 at 2:00 PM 7/29/2008

[unknown007]

Well since nobody on here can answer my question about driving with out the muffler alone is bad then screw it i'll take my risk!!!

[jarred15801]

it's perfectly fine driving without the muffler. I didn't really like the sound from just cutting off the muffler though. it wasn't any louder it just had a different tone, but then again i have a y33 so i don't know what the g50 would sound like?

[jimbyjimb]

G50 is much louder w/o suitcase. Completely different car. Exhaust systems do not effect an engines lifespan, unless it is super restricted. You could flat out remove the exhaust system and your engine would be fine. It will run as long as the o2 sensors are analyzing flow. You can bypass them, but exhaust system total removal is stupid unless you race or don't want to pass emissions and enjoy destroying the planet. In other words, without extensive modification your car needs an exhaust system. Mufflers, however, do not matter.

[unknown007]

G50 is much louder w/o suitcase. Completely different car. Exhaust systems do not effect an engines lifespan, unless it is super restricted. You could flat out remove the exhaust system and your engine would be fine. It will run as long as the o2 sensors are analyzing flow. You can bypass them, but exhaust system total removal is stupid unless you race or don't want to pass emissions and enjoy destroying the planet. In other words, without extensive modification your car needs an exhaust system. Mufflers, however, do not matter.

Only thing im removing is the suitcase.i'll put straight pipes later on i gotta check how much they are.

[Q45tech]

The largest restriction in exhaust system are the exhaust values , then comes headers, then cats...............the farther you get from the heads the less a restriction matters.

[unknown007]

The largest restriction in exhaust system are the exhaust values , then comes headers, then cats...............the farther you get from the heads the less a restriction matters.

I'm lost but yeah i get it.Well im stuck with the rusted bolts i was going to heat them but my battery died.It has been i need a new one.

[qship96]

I'm lost but yeah i get it.Well im stuck with the rusted bolts i was going to heat them but my battery died.It has been i need a new one.

What are you trying to say here? Dont understand how a dead battery keeps you from attending to rusty bolts?

"It has been I need a new one"......Speak English so we can understand what you are trying to communicate, please.

[unknown007]

What are you trying to say here? Dont understand how a dead battery keeps you from attending to rusty bolts?

"It has been I need a new one"......Speak English so we can understand what you are trying to communicate, please.

Eh bro check it don't take it in a bad way but i was mad so please just ignore it.The reason why my battery kept me from the bolts is because i have to move it into my garage,but i got it in now i jumped the car with my parents truck.

I torched the nuts and i hammered them with a rubber hammer 4798379743 times and it's still stuck im begining to get very mad but i know i cant so i can do it right.

Anyways i appreciate all the help guess it'll take up my whole day ugh,

[unknown007]

Forget this thread!!!As much as i hate quiting i have to.I cant take the bolts off,except the drive side one broke.Muffler shops charge 30+ just to remove to bolts.I said forget it im just gonna keep it like that because i never accomplish anything so screw it today was a terrible day for me. Thanks for all your help though.

[IceCubeFoSho]

About the Rusted Bolts:

Just google it http://www.essortment.com/home...u.htm

Try em and see what eventually works for you. Always remember to google any question before you make/post a question in a thread

[jimbyjimb]

You trying to remove the clamps? Just cut them or cut the pipe and clamp/weld new pipe over old to bypass.

[Q45tech]

For about 10 years whenever the Q is on a lift I spray about $10 worth of rubber and antirust chemicals on things that might need dissassembly sometime in the future. PREVENTATIVE MAINTEANANCE.

Waiting until you actually need to remove a rusted bolt or nut leaves you frustrated or in need of replacements.

Spending 15 minutes every 90 days sure beats hours or days fighting with something stuck.

[maxnix]

That's way to rational and forward looking.

Bolts should be like Amercian fast food and U-tube; instant gratification that won't tax the participant's attention span nor challenge his mental skills!
Modified by maxnix at 8:27 AM 8/2/2008

[Q45tech]

Why I always recommend car owners take a second part time job as a weekend/night oil technican or used car salesperson. What you will learn in 90 days will change your life.

US wastes too much time on Fri/Sat nights and sleeping.

If your whole life revolves around removing and replacing bolts and parts you learn fast.

[jimbyjimb]

Or we could all just ride bicycles. Replaced well over 60% of my weekly commute with my Univega. Life has never been so good, or so cheap. The downside is waking up between 2:30 and 3 AM to get to work by 4 AM, but the experience is infinitly rewarding.