rooster17

Had the resonated race exhaust installed yesterday and spent the better part of today driving. I love it. For me, it’s not too loud in the cabin and the drone hasn’t been an issue. Sure, it’s there. But it’s not terribly difficult to downshift a gear when you get into it. I don’t find myself in the drone range hardly at all anyway. The drone, again for me, isn’t as bad at neighborhood speeds. Highway with the top up it’s pretty bad on the meat of it. Great job Soul! All done rambling for now.

Purekoryo

Thanks for the feedback. Definitely getting one!

Purekoryo

Maybe this will make it louder but not too much:
https://www.fabspeed.com/porsche-718...hoCVCEQAvD_BwE

might be approaching 470hp with this and soul race exhaust. I’d be surprised if the GT4RS does not use the same motor. So much gains for a 6 cylinder with just exhaust! Really would be interested to see if anyone will be / are testing the intake side of things, especially given much gain with air coming out.

LZRD GRN

Just to confirm, do you have the Soul OAP's as well??

Thank you!

jmartpr

The race system doesn't require the OAP as it's a complete, single tube, system from the exhausts manifold to the muffler.

rooster17

Yep, what jmartpr said.

I had the OAP section wrapped in header wrap to reduce heat. Little extra piece of mind.

slilley

Actually, when it comes to perceived sound at the eardrum, it's a 10dB difference to double the perceived volume. To double the sound pressure requires a 6dB change. The 3dB rule applies to the raw power levels used to create these sound level changes. Lots more here: http://www.sengpielaudio.com/calculator-levelchange.htm

mjw930

I stand corrected and thanks for the link. The 3dB number was beat into me years ago but it was always a power discussion, not SPL or perceived.

The point I was making is still valid, it doesn’t take a lot, from a measurement standpoint to make a significant change in the perceived volume. I.e. LOUD does not always equal GOOD. I know Soul gets it as do many of the aftermarket exhaust makers else they wouldn’t spend the thousands of dollars and man hours they do trying to perfect the noise.

This may **** some people off and honestly I don’t really care, race exhausts are not appropriate for street vehicles, period, full stop. IMHO people who install these on street vehicles are the same people who think the quality of a car audio system is measured in SPL. There’s a reason people who race cars professionally all wear ear protection.

jmartpr

Actually it doesn't **** me and good that you don't care as it's your opinion.....I have a race system and headers (pending installation) but what I'm looking for is not volume but the tone.
When I had the 981 the last system I tried (after a couple from different brands) was a GT3 conversion without valves. I wasn't looking for the volume, that was a by product of running an aggressive setup. My goal was to mimic the GT3 sound/tone as close as possible, and it did.
Maybe this system I have now for the 718 will be too loud but I'm willing to try it to see the effects of it.....BTW, I do track my car a lot and it's just glorious to hear these uncorked engines sing...part of the track experience.

Foggy916

Westcoast

I am pretty sure he lives around the corner from me!

mjw930

To be clear, I love the sounds high performance motors make at full song but there’s a time and place for it and I’ve changed the exhaust on virtually every car and motorcycle I’ve ever owned so I don’t think I’m quite as bad as the cartoon

Based on what Matt’s car sounded like with race headers and the switchable Soul exhaust I’m thinking a resonated race exhaust with high performance cats behind headers might dial down the volume enough without changing the tone to be a reasonable compromise. That’s kind of what Dundon is working on. https://www.dundonmotorsports.com/pr...street-headers. (Sorry, don’t mean to cross reference vendors in one thread)

For these cars the full on “race” exhausts are literally straight pipes with absolutely no silencing which, BTW will make the car illegal on a large number of race tracks all over the world, forget about the street.

Quite honestly I’d love to experiment with my Spyder’s exhaust but the prices are way beyond any benefit for me but I suppose it’s all relative. Maybe I’ll hit the PowerBall and just buy a cup car

Porsche444

Tire Temps after install of OAP? Has anyone checked tire temps before/after the installation? I installed the SOUL OAP a few weeks ago and I just purchased a pyrometer last week and i was shocked yesterday when my rear tires where 115 on the outside, 122 mid and 130 inside. I have the stock setup, so no mod to camber and/or toe. Is this normal for the inside temp to be 15 degrees hotter, especially with no camber mod? I was going to get camber/toe mod, but now, i have to rethink this, because adding more camber will increase tire temp on the inside. I saw in post either here or another about excessive heat coming from the new SOUL OAP solution?

Thoughts?

Westcoast

Sorry, no luck with searching for anything on this forum... JCR posted in a thread that they determined that the inner tire temp was significantly affected by the OAP without heat shielding...

TXshaggy

C or F? What were the readings before Soul install?

Think I noticed one of the vendors selling a shielded solution measuring a 10-15 degree (can't remember if C or F) difference at the inside. Since it wasn't third party and not under strict controlled conditions it's just a single data point.

The GPF self cleans like your oven at home and the restriction both contribute a large amount of heat -- so stock shielding is understandable. Delete pipe has neither and is scavenging efficiently, so you'd think temps would be lower....dunno.

I don't remember anyone talking about OAP shielding in earlier generations until Akra and the 718 stock extreme shielding.

You run long enough eventually most things reach steady state anyway.