best exhaust piping size for N/A?
#1
best exhaust piping size for N/A?
I was reading through the forums a bit and am thinking of going to a single exhaust. 3" or possibly even 2.5". I feel like the exhaust I have right now, 2.5" true dual with x pipe and resonated test pipes may be a bit much for n/a and there is too much flow/not enough velocity. I know the stock cats are very restrictive so I would like to keep the test pipes in.
Just trying to get some opinions of what the best option would be?
right now current mods are:
2.5" true dual w/ x pipe and 2 resonators.
2.5" resonated TS1 test pipes.
440cc injectors
UTEC w/ map sensor
jwt pop charger w/ z tube.
in the future I am considering 11:1 pistons, rods, and jwt cams.
as far as exhaust considerations, these are what I am thinking:
Topspeed pro 1 w/ y pipe but using included silencers.
Custom single 3" to hks carbon muffler w/ resonator
custom 2.5" single to HKS carbon muffler w/ resonator.
any suggestions/ advice would be appreciated. Just trying to find the optimum setup for my goals. thansk in advance.
Just trying to get some opinions of what the best option would be?
right now current mods are:
2.5" true dual w/ x pipe and 2 resonators.
2.5" resonated TS1 test pipes.
440cc injectors
UTEC w/ map sensor
jwt pop charger w/ z tube.
in the future I am considering 11:1 pistons, rods, and jwt cams.
as far as exhaust considerations, these are what I am thinking:
Topspeed pro 1 w/ y pipe but using included silencers.
Custom single 3" to hks carbon muffler w/ resonator
custom 2.5" single to HKS carbon muffler w/ resonator.
any suggestions/ advice would be appreciated. Just trying to find the optimum setup for my goals. thansk in advance.
#2
IMO, 2.5 true-dual is perfect for NA VQ35's. I have a Fast Intentions exhaust (2.5" piping with an X-Pipe), along with 2.5" resonated test pipes. I had great gains throughout ALL the RPM's (2000-7000 RPM's) with my current NA setup.
Normally 2.25-2.5 true dual is idea. I can't say for single since im not exactly sure.
Normally 2.25-2.5 true dual is idea. I can't say for single since im not exactly sure.
#3
#4
I talked to a muffler guy, one that has been in the business for over 40 years. This guy does some great work and will be doing my custom exhaust. He too said if you go with a true dual, that the maximum you should go with is 2.25 - 2.5".
For a single pipe, which I'll be going with, he recommends 3".
For a single pipe, which I'll be going with, he recommends 3".
#6
I was reading through the forums a bit and am thinking of going to a single exhaust. 3" or possibly even 2.5". I feel like the exhaust I have right now, 2.5" true dual with x pipe and resonated test pipes may be a bit much for n/a and there is too much flow/not enough velocity. I know the stock cats are very restrictive so I would like to keep the test pipes in.
#7
Red Card Crew
iTrader: (24)
I couldn't be happier with my Borla 2.25" dual with my magnaflow resonated X. But I have not had a chance to drive a car with the Stillen dual/X with 2.5" piping.
Hydrazine was very specific on what pipe sizes he experienced as ideal. Best way to get a really good/educated hands on opinion would be to search his posts. Luckily, he doesn't post that much and when he does, it's very educational.
He likes 2.25" and 2.5" piping. And 3" single exhaust depending on which cats and Y you are using.
Hydrazine was very specific on what pipe sizes he experienced as ideal. Best way to get a really good/educated hands on opinion would be to search his posts. Luckily, he doesn't post that much and when he does, it's very educational.
He likes 2.25" and 2.5" piping. And 3" single exhaust depending on which cats and Y you are using.
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dikdiamond (04-21-2018)
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#8
For NA, a 2" true dual would be ideal even with your high power/rev plans. 2.5" TD on these cars is overkill and probably hurts low to mid range power because the exhaust velocity is too low. The lack of exhaust velocity is why people report low/mid range suffering when adding high flow exhausts. The OEM single setup is nearly 2.5" ID. It's plenty large enough for these motors assuming you're NA. The most restrictive parts on the exhaust are the cats, manifolds, and then the muffler (in that order). 3" single is probably overkill. I had a 3" single on my 94 Z28 and 3" single are common place among the LS1 F-Body crowd. A 3" single can easily support 450whp and the LT1/LS1 motors move A LOT more air than the VQ does, even a VQ revving to 7200rpms. A 3" single would probably hurt low/mid range power and throttle response on your car. I'd stick with 2.5 and no more than 2.75".
if the restrictive order is as such, then would an ideal setup be Dc headers, test pipes, stock y pipe and mid pipe, to an aftermarket muffler?
#9
For NA, a 2" true dual would be ideal even with your high power/rev plans. 2.5" TD on these cars is overkill and probably hurts low to mid range power because the exhaust velocity is too low. The lack of exhaust velocity is why people report low/mid range suffering when adding high flow exhausts. The OEM single setup is nearly 2.5" ID. It's plenty large enough for these motors assuming you're NA. The most restrictive parts on the exhaust are the cats, manifolds, and then the muffler (in that order). 3" single is probably overkill. I had a 3" single on my 94 Z28 and 3" single are common place among the LS1 F-Body crowd. A 3" single can easily support 450whp and the LT1/LS1 motors move A LOT more air than the VQ does, even a VQ revving to 7200rpms. A 3" single would probably hurt low/mid range power and throttle response on your car. I'd stick with 2.5 and no more than 2.75".
In theory, I see what you're saying. But it doesn't seem to be the case for me. Not atleast for my setup.
#10
IMO, 2.5 true-dual is perfect for NA VQ35's. I have a Fast Intentions exhaust (2.5" piping with an X-Pipe), along with 2.5" resonated test pipes. I had great gains throughout ALL the RPM's (2000-7000 RPM's) with my current NA setup.
Normally 2.25-2.5 true dual is idea. I can't say for single since im not exactly sure.
Normally 2.25-2.5 true dual is idea. I can't say for single since im not exactly sure.
#14
I've seen guys run single exhaust up to 3.5 with HUGE gains. Infact, I've been reading that single exhaust are actually better than true dual exhuast. When you have a dual exhaust, you need a properly placed X pipe to converge the exhaust gasses, and because of the 2 pipes, and the added drag, they don't seem to flow as well.