Has anyone deleted the resonator in the stock airbox? or made a larger snorkel?

[Turdinator]

And a sound clip. This is with the MaxRacing duct, Perrin silicon intake, Perrin foam filter and all other resonators removed and sealed.

[ame]http://youtu.be/xbpEtjbpRFc[/ame]

[Huehuecoyotl]

before and after dynos...

[Turdinator]

Originally Posted by Huehuecoyotl

before and after dynos...

I don't have any in my local area but I will see if I can hunt one down. The good old butt dyno thinks it adds more than the silicone tube but less than the filter.

[NickFRS]

Now I need to buy one..... They are so expensive though!!!

[NickFRS]

Originally Posted by Turdinator

And a sound clip. This is with the MaxRacing duct, Perrin silicon intake, Perrin foam filter and all other resonators removed and sealed.

can you take a picture with flash of where it sits behind the bumper? I'm curious about that. If I did go this route I think a mesh guard before and after the snorkel might be a good idea

[Turdinator]

Originally Posted by NickFRS

can you take a picture with flash of where it sits behind the bumper? I'm curious about that. If I did go this route I think a mesh guard before and after the snorkel might be a good idea

I have a close up one that i'll post when i get home. I will se what i can do from further away. I don't know if the iphone flash is strong enough.

[Turdinator]

And Gem when you return PM again.

[Turdinator]

Here you go @NickFRS

[vtmike]

Originally Posted by Xanatos

The resonators are put there to create better flow. I don't know why you'd want to remove it.

When the valve closes right after intake air inside your intake has nowhere to go. A pressure wave is created as soon as the valve closes and that wave rebounds backwards towards the entry point. The resonators allow these high pressure air waves to expand allowing the new air that was sucked in to remain in your intake for the next cycle.

That's just speculation and hasn't been shown to be the case in any testing with this car. The trd engineers didn't find them necessary on their griffon build car.

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[Kodename47]

Originally Posted by vtmike

That's just speculation and hasn't been shown to be the case in any testing with this car. The trd engineers didn't find them necessary on their griffon build car.

Can you wait 3 weeks for some results?.... I'll get both dyno and road test results and draw a real conclusion rather than speculation. I drilled the rivets from mine so I can easily put them back in.

I still believe that the main resonator helps throttle response lower down, might have to do with added volume of the airbox as well as wave cancellation. As stated the Griffon is a race car and will spend time at full throttle & high RPM where it's likely the resonators make less of a difference.

[vtmike]

Originally Posted by Kodename47

Can you wait 3 weeks for some results?.... I'll get both dyno and road test results and draw a real conclusion rather than speculation. I drilled the rivets from mine so I can easily put them back in.

I still believe that the main resonator helps throttle response lower down, might have to do with added volume of the airbox as well as wave cancellation. As stated the Griffon is a race car and will spend time at full throttle & high RPM where it's likely the resonators make less of a difference.

I'm all for some testing. Mine are gone and I haven't noticed any difference besides sound. The only company I know that mentioned doing testing with the resonators is perrin who said they made no difference.

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[NickFRS]

I don't think a dyno will truly show anything. But if you do get a dyno and be like the car lost 1HP! The engine will flux 2-3HP per pull on its own naturally. So it's hard to figure it out... I believe the only way you could compare is if you had a stock car with stock intake. Then compare the AFR's with and w.o. Otherwise it's just false data. PLus when you speak of throttle response we are talking milliseconds here. Also all CAI in your theory would have the same waves you are talking about and create bad throttle response since they don't have resonators. (the only reason cai's have better throttle response is the added volume in the tune and it's not so aggressive bends. This creates better air flow)

My theory: The resonators are put in place to reduce induction noise. All stock cars have zero induction noise. The sound tube was created to increase engine noise in the cabin to give that little extra pazaz of performance but in reality doesn't really change anything that dramatically. You can hear my intake scream now after 4k RPM's when my vvt and dual avcs kick in harder. Also i'm assuming w.o the resonators the car wouldn't be carb legal. Plus on a stock car when you are talking about 2k response time the only time I would see myself at 2k RPM's is in first rolling at 5mph and there will always be a flux in throttle response in first due to the drivetrain and gear size as well as 2nd. This will be more dramatic with a LWCP and LWFW. Since the ratio is so small and if you have the reduction in spinning weight/mass the ECU has to really think to go with throttle position let alone all the other variables. If you are in a higher gear your car in general is about to hit the torque dip and w.o headers the plot from 2k-4k is discusting. Mine shows this on the dyno graph. a camel back of torque between 2k-3k is always going to feel weird while driving.

[NickFRS]

Also I believe the TRD griffith car was the creation stand point behind the TRD intake. They were testing "I mean truly" testing with that car. Once they figured out the resonators and sound tube were for emissions and customer satisfaction they deleted them and started production of the TRD intake you see today that just hit the market as an "after market solution." The box is still huge and thats due to emissions also! Big ins't always better. Vacuums dont have huge hoses on them for a reason. It creates less suction. A small 2.0 doesn't need a huge intake! A engine has to be rounded and mods have to complement each other. mods don't stack up HP or TQ .

^^^ assumption

Plus cai intakes don't really show any real true gains over stock once tuned unless we are talking about FI.

[vtmike]

Originally Posted by NickFRS

I don't think a dyno will truly show anything. But if you do get a dyno and be like the car lost 1HP! The engine will flux 2-3HP per pull on its own naturally. So it's hard to figure it out... I believe the only way you could compare is if you had a stock car with stock intake. Then compare the AFR's with and w.o. Otherwise it's just false data. PLus when you speak of throttle response we are talking milliseconds here. Also all CAI in your theory would have the same waves you are talking about and create bad throttle response since they don't have resonators. (the only reason cai's have better throttle response is the added volume in the tune and it's not so aggressive bends. This creates better air flow)

My theory: The resonators are put in place to reduce induction noise. All stock cars have zero induction noise. The sound tube was created to increase engine noise in the cabin to give that little extra pazaz of performance but in reality doesn't really change anything that dramatically. You can hear my intake scream now after 4k RPM's when my vvt and dual avcs kick in harder. Also i'm assuming w.o the resonators the car wouldn't be carb legal. Plus on a stock car when you are talking about 2k response time the only time I would see myself at 2k RPM's is in first rolling at 5mph and there will always be a flux in throttle response in first due to the drivetrain and gear size as well as 2nd. This will be more dramatic with a LWCP and LWFW. Since the ratio is so small and if you have the reduction in spinning weight/mass the ECU has to really think to go with throttle position let alone all the other variables. If you are in a higher gear your car in general is about to hit the torque dip and w.o headers the plot from 2k-4k is discusting. Mine shows this on the dyno graph. a camel back of torque between 2k-3k is always going to feel weird while driving.

Agreed. Throttle response is such a subjective thing and susceptible to placebo effect. The ecu effects it tremendously as demonstrated by post reset dead pedal.

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