Get HFC a good cat back exhaust with a x pipe or x muffler and tune and you will be close ..

 

30-40tq would indicate a 35-50 hp in crease, and those mods are nowhere close 35hp.

 

30 shot of Nitrous

 

Trade in for an AWD coupe/sedan. It will feel like it has more torque...

 

hmmmm, that's too bad. I'd settle for 20 more I suppose. Anybody recommend a good hfc and catback system(s) without drone and good and not too loud sound? And the Stillen stage 3 is the way to go for CAI's? Are there any impartial 3rd parties out there who use the stillen who have proven dyno results? I understand that those are really expensive.

In fact, it seems like a lot of exhausts and CAI's for G37s are really, really expensive. I used to think 330 for a CAI was bad, but I thought I saw a G37 CAI for like, 800+? That's crazy - is that because of the dual everything? And the catbacks seem expensive as well - is this true? What's a good ballpark figure to have to spend for a good CAI and hfc/exhaust set up? I know the Cobb is around 600, with free beta tuning software, which is very cool of them, so ho much more am I looking at for hfc/catback/cai?

 

Injen CAI dyno. I think it's around 500 or less now.

https://www.myg37.com/forums/intake-...-dyno-fun.html
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Pick an exhaust first and go from there. If your going for FI, then i would suggest get an FI hfc's as well. Vonyc is selling a whole setup like this. Pm him or check his FS thread. For CAI, you either get Injen or the Stillen 3 G.

 

You should do some more searching ....

 

I ***** on forums all day while I'm on the phone at work. I've yet to see, for most mods, independent dyno results that are beyond the error range on a dyno, let alone a 35 hp gain on a G37 from the above said mods.

In fact, since it comes up, Cobb explicitly states that their maps are for use with STOCK intakes only.

Funny, because the STOCK intake on the G35 has also been proven to be the best, after six years of debate. All other intakes are purely for noise increase.


I refuse to believe that Nissan's engineering is so poor that a simple intake tube made with minimal R&D can provide horsepower. This is supported by the simple fact that the throttlebodies do not open all the way on a VQ, airflow is not the restricting factor.

The VQ37 already has steller hp/liter, and it is difficult to improve that.

The mods that I do acknowledge create power are HFC/TPs and a tune (albiet, at the cost of low/midrange power). An exhaust may not create power, but weight loss is always welcome a well.

Headers will create power as well.


All in all even with a AP, custom tune, TP, Headers, and Exhaust, I do not think a 35-50hp gain is possible. If it was, then we wouldn't be having trouble with flashed 335s. A 366hp Dinan 335 vs a 365 (330 + 35) hp G37 would be a driver's race, but it's not.

 

With the 335's twin turbo boost controlled by an aftermarket flash, I would think just about anyone would have trouble with those. That would probably make them ridiculously fast.

So I get it - turbo kit for real power + goodbye warranty or be happy with a tune, full exhaust and possibly a cai for, what, 20 - 30 whp tops? 15-20 lbs torque? I'm coming from a G8 GT with a just a tune, and that had me close to 400 lbs of torque. I just need to accept my current reality I suppose, or buy those turbos, I guess

 

If dealership detects that you've reflashed the ECU (tune), they may void the warranty as well, depending on the issue.
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Well I just looked at the ATM - very nice kit with exhaust for 6k or so. Decent price. For the same money, I could just drop in an LS3 6.2 lol....I wonder if anyone has ever done that, seriously, that'd be insane.

 

DO IT!
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Yes, been through all of that with my last car. The bottom line was that, as long as you flashed back to stock before going to the dealer, there was basically no way to tell even though the engine's ECU (LSx series) was capable of recording the hash of the last 10 flashes. But GM never used it that way, and at least one forum member had blown his engine on a tune, tuned it back to stock, and then took it to the dealer with no problems. That's why I want a handheld tuner, so I have the ability to tune back at will.

But that being said, I have no idea what Nissan's capabilities are in terms of detecting previous flashes. Does anyone else? Any Nissan / Infiniti techs on here?

 

You joke, but people do LSX drop-ins with a turbo (for God's sake) to the 240-260-280z's all the time...it's insane. But they're usually purpose-built for drag racing, etc....