New Soho Single exit for the 370z!!

Gregor12

just for an update. i Replaced the y pipe with the soho y pipe as well. going to put the car on the dyne and then go back to stock to get some official numbers on this single

Bananaz

Damn this sounds good. Is the recommended ID of a single exit 3"?

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Gregor12

thanks man. and I’m not to sure. from what i understood yes. the single makes great power and weighs like 15 lbs lol ill let you know official numbers very soon so you can compare to other cat backs. also I’m having a resonator installed soon so ill upload another video showing what kind of tone it will have then.

NoLaKrewe

Can't wait for updatwa

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Gregor12

Well guys it's on the dyno. Here's the results on stock map. Next week I'll get a baseline. But I'm happy as hell with the numbers

321rwhp 267lb/ft


Mods:
Soho y-pipe
Soho y back single exit exhaust

Stock intakes
Stock cats
Factory tune

jaedub

41 whp gains just from cat back exhaust seems way too high. What dyno did you use?

Chuck33079

Yeah, that's way too high for a z with a cat back. OP, what does a stock z put down on that dyno?

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Gregor12

it was in a dynojet. And idk but I was standing right there when he put my car on the dyno. Those were the numbers! Lol

09 370z right before me made 333 and 278
Aam cold airs
Motor dyne manifold
Z1 headers and test pipes
AAM cat back
Tuned

2013 370z 335hp 282lbft
Fast intentions high flow cats
Fast intentions cat back
Injen cold airs
Tuned

08 G37s put down 316hp 2XXtq
Takeda cold airs
Z1 manifold
Belluga test pipes and cat back

I personally know a good bit of cars that've been on this dyno and it reads just like any other dynojet. I have it all on video if you guys want to see. I was impressed as well. I Bet nik at soho a car wash that there was no way I'd break 310 but he proved me wrong. Now I have to wash his Z lol

Japanjay

That middle one is not normal. The other three are and yours are not normal numbers. This platform has been around for 5 years and no one has been able to create "41whp" from just an exhaust, no tune or nothing else. Tomie's is identical, doesn't do that not even close, so I do believe you are the only one thinking that this is even possible without having a severely inflated dyno. But everyone will see when you baseline, with the exhaust put back to stock. Non-nismo will be around 273-77ish consistently state to state dyno to dyno for the last 6 years.

NoLaKrewe

While I agree some numbers may seem inflated, I do think we will get to the bottom of this. Gregor seems to be doing a honest job on his end to provide us with information. Either way I did want to point out that Soho and Tomei are not the same. Sohos y pipe is 3 inch whereas tomie is only 2.5. I am not saying their is a major difference there but I do remember reading a 3 inch y pipe being recommend on the tomie thread.

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abm89

I feel the need to correct you:

The Tomei Y pipe is 76.3mm, which is right around 3". Tomei Specs

I use the Motordyne Y Pipe.

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Gregor12

where In the **** did I post a 41 whp gain? I never said that, I just posted numbers. THESE ARE STD NUMBERS ON A DYNOJET. They're normal. Is it higher than some other dynos? Sure why not. None of that mattes. I know who put this exhaust together. That's why I payed good money for it. It was built and designed by power junkies who get payed 6 figure salaries to build them on race cars so if it makes more than usual, I won't be surprised. Not for looks or its "shinyness". I'm not even trying to praise anyone. Im giving Yall the facts to try and help Out other 370z owners by bringing something different. I'm not here for soho Motorsports or anyone else. I represent myself and my car. I was the first one to get this exhaust so that's why I shared it on here. All of you need to be patient and just stick around. The dyno numbers will do the talking. High, low, or normal doesn't matter to me. I just want to know the Gains. I would rather not go back and fourth about it. You cannot compare dynos. It's apples to oranges.

Also, the 370z has a 18% power loss through the drivetrain if what you're saying is true. It shouldn't be that under. A 350z HR with intake and exhaust made 276 on this dyno. It's not that inflated. I've been around this dyno for 4 years now and have attended three dyno days. Go look at the videos. My brothers mustang was spot on with Paxton's dyno. Todd from Alabama brought his G and put down the exact numbers he put down at forged performance. This dyno reads a little below what used to be CINs mustang dyno. It reads higher than 42 auto sports dyno dynamics by about 15-20 percent which is normal. It reads lower than Z1's dyno. I don't know why yall like to assume I'm bullshitting. It's not going to benefit me or anyone else. There are hundreds of factors at play here as well. Different cars, temps, humidity, mods, and all kinds of **** haha. Just give me some time to get you guys a baseline so we can see the gains.

Just wait for the numbers and gains. That's all I ask lol. This should be a thread of Horsepower, torque, and other info. Not a dyno war

synolimit

Depends what you consider normal. If he made 320 with those mods in STD in 5th gear then SAE in 4th's only 301hp. With a CBE and drop in's like he said it's still high but possibly possible. My stock tune with CAI, and CBE was 280 in 4th SAE. Why the 21hp more? Idk.

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Gregor12

Very true sir! Dyno most likely reads higher than the one you were on. what kind of mods were you running? Depending on your conditions at that time and day it could've been 300 std. Doesn't std basically correct the weather to the best temp and humidty. From what I rmemebr SAE takes the current weather and humidity into consideration where std is what you'll make in prime weather conditions for MAX POWER. Lol

Also I hope this exhaust does make great power. I'll give you guys a base line here soon

synolimit

like said i had half a CAI, CBE and RPF1's on the stock tune. after LTH's i went up to 293hp. why with the cats removed you're still 8 more hp idk.

no SAE and STD are the same they just target different temps and humidity. STD is a lower temp which if a car was running in a lower temp it'd produce more HP from the cooler more dense air unless youre actually blowing hot air at the DJ sensors. if you do this you screw the sensor up so much the car will show a ton of power because youre still moving the drum fast but the sensors reading like 100+ degrees.

what i dont get is all DJ are calculated the same unless youre on a DJ thats both an inertia and load cell (DJ does make these hybrids). so with the calculation set to either STD or SAE whether in Dever in winter or Miami in summer the same car should put down the same numbers no matter what. the hybrids are like a mustang and whatever you input you get change the output unlike a normal inertia DJ.

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