2 or 2.25" exhaust confused ??

[Pacey]

Hi all

Just about to get a new exhaust system on my 260Z with a L28 EFI. No cataliyc convertor.

Nothing to wild engine wise, mild cam, port/polished, larger throttle body. No extractors.

Looking for a nice note with a bit of a growl if possible.

Currently has 2" pipework, resonator (hot dog style) and a stainless steel muffler up at the rear,, sounds ok, but low down power is a little weak.

Should I go 2" again or risk going 2.25"

Will I gain or lose performance.

And should I go for the resonator setup again as I believe the L series likes a bit of back pressure.

 

I am finding a lot of differences of opinion in my searches.

 

Any feedback appreciated.

 

[Scoota G]

I liked the 2 1/4 on a near stock engine till i heard dales 2.5 system but he runs extractors. Power gains were more than noticable.

[Pacey]

Thanks Scoota

Do you mean the power was better on the 2 1/4 or Dales 2 1/2

Just wanna get it right..

[Scoota G]

The 2.5 was much better. Dales car runs an L28 with extractors, twin hitachis, electronic ignition and an A grind cam from an L24. I run a 2 1/4 but i'll be going to 2.5. Peter Mac said a 3 inch wouldn't be out of the question on mine.

[Pacey]

Thanks yet again.

I think you've got me swaying to the 2.5

What do you feel about the resonator  ?

[Scoota G]

Dales doesn't run one and i think it sounds spot on. I'll get a video of the sound and you'll see what i mean.

 

 

Here's one i took earlier.

[C.A.R.]

I have a mild L24 (EFi, mild cam, lightly ported head, headers, 9.1 CR) & I run a 2.5" system.

The  power & torque increase over the old 2" system that was on it was VERY noticeable...!

[RB30X]

Peter Mac said a 3 inch wouldn't be out of the question on mine.

 

Peter might have been buttering you up a bit Scoota, 3" would be way too big unless you had a race built L28 that sat on 7000 all day.

 

From my RB days the NA 3L got 2.5" exhaust and no bigger, unless you had a turbo in which case factory and slightly larger turbos got 3" and bigger turbos got 3.5-4".

 

Resonators take the drone out of an exhaust system, but some seem to like drone, makes it sound louder which means of course it is faster Your exhaust can still be loud with one, it depends on the muffler. There is a young bloke down my street with an automatic magna and he has the worst sounding exhaust ever. No resonators just two big cannons out the back. I feel sick every time he drives past.

 

[Pacey]

Guys

Thank you all for the input.

Looks like I'll go with the 2.5". Might try first without the resonator and see how I go with the drone.

Can always add one later.

 

Great to see so many enthusiast's out there, at least I'm not the only madman living and breathing Z's.

 

Does it ever end ?? Hope not..

 

Cheers

[Zedman240®]

Try and run with a resonator in the middle, or else you will get that barky sound. I always used those large cylindrical resonators that look like small cannon mufflers; no droning but just a deep growl with a straight through muffler on the back. 2.5" should be as big as you want to go.

[Pacey]

Thanks Zedman

Yeah I currently have the resonator in the middle of the 2" setup and sounds smooth not barky. But the pipes are now getting way to old, time to upgrade to the 2.5".

 

Cheers

 

 

[MaygZ]

Try and run with a resonator in the middle, or else you will get that barky sound. I always used those large cylindrical resonators that look like small cannon mufflers; no droning but just a deep growl with a straight through muffler on the back. 2.5" should be as big as you want to go.

 

I had a play with this car on the weekend.  It sounds hotter than ..... I don't know what, but it sounds REALLY hot. 

[lightmaster240z]

Come along to the next BBQ and have a listen to a few different system them make up your mind. Personal I went with a 2.5" System and could not be happier

 

[Pacey]

Thanks

The BBQ sounds like a great idea.

can get to see a few cars and hear a few notes.

I have looked at the event tab, and I cant see anything coming up. am I looking in the right place

[luvemfast]

Thanks

The BBQ sounds like a great idea.

can get to see a few cars and hear a few notes.

I have looked at the event tab, and I cant see anything coming up. am I looking in the right place

 

See here

http://www.viczcar.com/forum/index.php/topic,9052.0.html

 

I have a 2.5" too

[Pacey]

Thanks Simon

Sounds great, Ill be there..

hopefully I'll have the new 2.5" by then..

BTW

anyone had any experience with the Jaycar Digital fuel Adjuster, I'd like to discuss a few concerns..

 

Alan

[620Z]

Make sure you put in a resonator otherwise the car might be too loud when cruising. They make a big difference and you won't lose power. Go the 2.5. You know you will probably do something to the motor or extractors. Don't make the same mistake as most and get a 2" or 2.25" then do up your motor and then have to get a bigger exhaust again. This is partly where you waste money on your Zed doing things 2 and 3 times.

[Pacey]

Thanks Craig

Yeah I sure will put on a resonator, dont need to go through the old RWC after the cops pull me up.

2.5' it is.

 

BTW

how do I get a photo up like you all have, cant seem to upload it anywhere, I have had a look at my profile ??

 

 

[620Z]

The thing is the resonator doesn't really make the car much quieter on the out side. A bit. But it makes a massive different in eliminating the rumbling noice in side. So on that long cruise you don't end up partially deaf. 

I think you have to save a picture in your photo's and then attach it to your avatar. But it has to be a small file. I think that's the way but someone here can chime in and correct me if I'm wrong.