Straight pipes

[stokerace]

New to the forum everyone just had a quick question my friend is debating with me on whether straight pipes reduce power due to back pressure but doesn't back pressure hold the car back? If I have a completely free flow system then isn't that the best case for an exhaust system? I have a 325ix just got if about 2 months ago

[slammin.e28]

"Backpressure" doesn't exist. Exhaust is in pulses.

[stokerace]

I hear people complain about back pressure all the time nd how it "holds them back"

[nando]

I really want to say mean things but I won't.

Just leave your exhaust alone. Whatever you're talking about, isn't what you think it is. all you are going to do is make it really loud for no reason. please don't destroy another ix.

[Roysneon]

I really want to say mean things but I won't.

Just leave your exhaust alone. Whatever you're talking about, isn't what you think it is. all you are going to do is make it really loud for no reason. please don't destroy another ix.

Loud exhausts are fun for a week or so, then your ears want to punch you in the dick every time you drive.

Sincerely,

The guy who had an exhaust that used to set off car alarms

[Smelser]

I hear people complain about back pressure all the time nd how it "holds them back"

if you run 1.5" exhuast pipe, yeah, your gonna choke power.

if you take your manifold off, and let the head breathe free like willy jumping a wall,
your gonna screw the engine up.

get a nice header to start.(i recommend ANYTHING from Ireland Engineering!!)
depending on your engine find a nice size pipe to allow the gas to freely flow, (2.25-3.5")
play with it as far as muffler, many mufflers are straight through designs and just help to "dampen" the sound so it doesnt sound like a lawnmower on steriods.

your only limit is money and time.

[Smelser]

Loud exhausts are fun for a week or so, then your ears want to punch you in the dick every time you drive.

Sincerely,

The guy who had an exhaust that used to set off car alarms

HAHAHAHAHA

I had that happen with my old truck. 2000 silverado, 6.0L 360+ cubic inch. had 3" pipes all the way to back for each bank, then 17" long 5.5" tips, backed up to a barrier in the parking at niagara falls casino, fired the truck up and 5 car alarms went off. I laughed till I pulled out and had to stop at the gas station

[stokerace]

if you run 1.5" exhuast pipe, yeah, your gonna choke power.

if you take your manifold off, and let the head breathe free like willy jumping a wall,
your gonna screw the engine up.

get a nice header to start.(i recommend ANYTHING from Ireland Engineering!!)
depending on your engine find a nice size pipe to allow the gas to freely flow, (2.25-3.5")
play with it as far as muffler, many mufflers are straight through designs and just help to "dampen" the sound so it doesnt sound like a lawnmower on steriods.

your only limit is money and time.

Thanks that's all I needed to know I'm getting
In on the group buy from bullet ride cause no headers will fit the IX

[nando]

most headers fit the ix just fine

[iwantspeed]

most headers fit the ix just fine

for the orignal poster this guy knows what he is talking about^
he owns one of the nicest e30 ix's on r3v just check out his build thread.

[Roysneon]

Anytime my room mate or I can't figure something out betwen us, the answer always ends up being "We'll just ask Nando" haha. Kind of a running gag but he's the real deal. From iX front input shaft trickery to cracking s54 DMEs, he's got e30 info on lock.

[TobyB]

then your ears want to punch you in the dick every time you drive.

that sounds painful....

t

[Zreberlcoe]

I have been toying this idea as well except I just want it to be slightly louder so I wasn't think a true straight pipe. I was think cat back and machining two identical mounts that bolt up to the cat back and then from those conjoining two pipes to one and bend it appropriately and after that just split the pipes coming out the back so it doesn't look like a subaru or honda.

[artoo93]

HAHAHAHAHA

I had that happen with my old truck. 2000 silverado, 6.0L 360+ cubic inch. had 3" pipes all the way to back for each bank, then 17" long 5.5" tips, backed up to a barrier in the parking at niagara falls casino, fired the truck up and 5 car alarms went off. I laughed till I pulled out and had to stop at the gas station

This used to be me with my 1975 Camaro!! 350 SB with headers into a 3" stainless dual exhaust with glass packs!!! Would rattle windows as I drove!! Could never sneak anywhere! Boy I miss that car!!!!!

Now I do it with my 2007 Harley Ultra Classic with true duals and Rinehart slip ons!!! Love to drive through parking lots and see who has real sensitive car alarms!!!!!!

[Northern]

An m20 with stock midsection cat/resonator but a straight catback is unbearable, I can't even think about what full straight pipes would sound like