Supersprint & SCZA 2.5" System w/ Mods

[enjoy_m3]

any sound clips?

[Tbonem3]

Ya I owned one briefly. I didn't like the sound, in the end. The dummy tips didn't bother me much, knowing that it was functional. Good weight. I polished the tips.

[jbfrancis3]

Yes, the dinan is 2.5" and it has no bends greater than 90 degrees iirc. It's probably the best flowing muffler you could buy for this car.

As usual you're on top of it. Yes, simply two 90 deg bends. Illustrated on pg 3: https://documents.holley.com/d660-4604_white_paper.pdf

[Tbonem3]

Yes, the dinan is 2.5" and it has no bends greater than 90 degrees iirc. It's probably the best flowing muffler you could buy for this car.

[jbfrancis3]

jbfrancis3 I would venture to say that the second option might be best, as the merge point is exactly where SS put it, or close to it at least. Deviating from stock H bridge placements has not always been met with acceptable results, at least in terms of power/efficiency.

Thanks, that’s what I remember reading. I also remember reading that moving away from the H-pipe has a noticeable impact to torque but I don’t remember to what extent or how it was phrased.

The Dinan exhaust arrived today. It’s actually 2.5” tubing. I either completely missed that or it wasn’t documented. Pleased about that

[CrisSilberGrau]

I have the SS dual Sec. 2 comming but am hesitant to install it as it sounds like (pun) it really does quite things down. So that order may need to be canceled or part sold down the river.

My stock Sec. 2 barely clears the diff OPF and RACP as is, with the heatshield removed,I think this is mostly due to the fitment issues with the SCZA.

I really do like the sound mine makes now and making it quieter does not interest me at this point. I am considering getting an RE El Diablo muffler for a bit more volume actually.

Unfortunately my quest for maximum NA hp gains on this car is over with so exhaust volume/tone takes priority for me. It is just too much $ for minimal gains so it's time to be a 16yo and tune up an n54 chassis, something I can afford and make quite fast.

I have SSv1 and the SS sec 2 res with SCZA and it gave the car a much more refined tone, and quieter than my original setup (oe euro, stock s1 s2, scza). The original is my favorite sounding, super raw and banshee like at high RPM.

Now reading your post im afraid if I refresh my tired and broken hangers, my sec 2 will not fit anymore. I was surprised my SS sec 2 fit with the shield on. I now think that was a mere fluke.

jbfrancis3 I would venture to say that the second option might be best, as the merge point is exactly where SS put it, or close to it at least. Deviating from stock H bridge placements has not always been met with acceptable results, at least in terms of power/efficiency.

[jbfrancis3]

I ended up buying a Dinan section 3 and skipped the Megan installation. I realized when I did the v-bands, I changed the spacing between tubes at the section 2-to-3 connection. So I only want to spend timing modifying one exhaust.

Rogue Engineering's exhaust hangers also arrived. Nicely made pieces.

So here's a question for the peanut gallery. I'm fairly certain I want to try an x-pipe configuration around where the H-pipe currently exists. After hearing the Dinan, all else being equal. The H-pipe would be eliminated. I'd like to see if I get a higher pitched rip like any generic writeup on x-pipe vs H-pipe will tell you. I understand there will/may be a torque penalty.

Do I...

#1 - do a little less work and put the convergence where the chassis brace w/ exhaust mount is? The bends of the dual pipes as they sit now are conducive to this spot.



or #2 - move the v-bands closer to the cats which creates the necessary space for the x-pipe to lay exactly where the h-pipe was?


Don't scrutinize my CAD skills too much as it relates to overlap and such.

[Tbonem3]

great flow, fair used price, good weight, good quality. Sound isn't bad, just not good either, and that's just my subjective opinion

[jbfrancis3]

Dinan is a great exhaust, but dummy tips and meh sound.

Lol what's left, then, to make it still great?

Glad you mentioned the Megan - I actually have one stashed away from when I found it on the cheap. There's no reason not to try. Thanks for the reminder!!

You, and others, are certainly right about the larger tubing sacrificing good sound traits due to the lower velocity.

To wonder a little further off-track. Another thing that's occurred to me (you all will say no shit) is when S54 headers are listed as equal length, they referring to the 6 primaries as being equal length up to the first merge point. That merge point is for 3 primaries on a given bank. After that, the distance up to the next merge point (typically the h-pipe or an x-pipe) is not equal length. Has anyone ever endeavored to do equal, equal?

[Tbonem3]

Dinan is a great exhaust, but dummy tips and meh sound.

If you want to be cheap, I think Megan's muffler is 2.5"

El diablo lost so much power because it was 55mm / 2.16" piping, but v2 is now 60mm / 2.365" same as Supersprint/eisenmann/most others. RE will custom make you a 2.5" version if you want.

Don't expect a 2.5" el diablo to sound like a 55mm el diablo. There's a reason why the el diablo sounds so good on all the old videos on youtube...

Ian's old setup of JVTs and OM scorza sounded so good because the JVTs, like all headers except ss v1s, are 55mm outlets.

I'm going to be putting my OG scorza on my steelgrey with the best sounding headers, Fabspeeds (or ss tubulare, of which the fabspeeds are the best reproduction). I'll get videos.

If you listen to my later videos with 2.5" piping and 2.5" scza, it doesn't hold a candle to 2.16" headers/sect 1 plus 2.36 or 2.5" muffler.

[jbfrancis3]

It was around 15 straight back to back with the scza. After all I've done to get power I can't stomach losing that much for a different exhaust note. Never tried Dinan's, I'm still stuck on the dummy tips

Great data point. And hey, I get it.

I'm guilty of drinking some of the Dinan koolaid: https://documents.holley.com/d660-4604_white_paper.pdf

The other route I'm considering is re-packing the SCZA with some stainless steel wool. Again, finding myself on the long path..

[Apex_80]

My fault, that was poorly written and didn't mean to imply that. By hurt power, I mean how much are we talking? I could get around a 10-15hp penalty. If the number started with a 2, then no thanks.

Did you ever try Dinan's? Early on, I thought hell no to dummy tips. Now, I'm not sure that I care all that much.

It was around 15 straight back to back with the scza. After all I've done to get power I can't stomach losing that much for a different exhaust note. Never tried Dinan's, I'm still stuck on the dummy tips

[jbfrancis3]

I wish I could say that was my first exhaust setup but I've done a bunch. My favorite sound wise was the Rogue El diablo, but the combination of the 2.25" piping and the harsh bend on one of the pipes really hurt power. I'm not sure what other section 3's there are out there that would provide a better not and not completely dominate the airbox.

My fault, that was poorly written and didn't mean to imply that. By hurt power, I mean how much are we talking? I could get around a 10-15hp penalty. If the number started with a 2, then no thanks.

Did you ever try Dinan's? Early on, I thought hell no to dummy tips. Now, I'm not sure that I care all that much.

[Cubieman]

I have the SS dual Sec. 2 comming but am hesitant to install it as it sounds like (pun) it really does quite things down. So that order may need to be canceled or part sold down the river.

My stock Sec. 2 barely clears the diff OPF and RACP as is, with the heatshield removed,I think this is mostly due to the fitment issues with the SCZA.

I really do like the sound mine makes now and making it quieter does not interest me at this point. I am considering getting an RE El Diablo muffler for a bit more volume actually.

Unfortunately my quest for maximum NA hp gains on this car is over with so exhaust volume/tone takes priority for me. It is just too much $ for minimal gains so it's time to be a 16yo and tune up an n54 chassis, something I can afford and make quite fast.

[tnord]

is there any commentary on the audible difference between SS resonated twin 2.5'' and SS resonated X pipe?