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

[NickFRS]

Also I would recommend everyone to get a custom tune that is directly for your car. Base maps or E map data doesn't give justice to what putting your car on the dyno and letting a tuner sit behind the wheel and work their magic.

[Kodename47]

Guys, I know what I'm doing. Dyno variance etc. is all old news to me, I'm not going to make my choices over a 1hp difference. I have the ability to log everything as we do the tests, both dyno and road. If there's no difference then I'll say so, but I'll post my findings either way. The map shouldn't be any different whether the resonators are present or not anyway, I'm guessing you'll all agree on that since you're telling me that there's no performance difference.

Oh.... and you don't have to put up with a dead pedal after reset/reflash I know I don't...

@NickFRS, have you considered that on partial throttle when a smaller vacuum is created that having a larger volume of air in a chamber near the TB may well be beneficial? Hence the large TRD box and the resonator on the stock airbox. It's just my theory and I could happily be wrong.

[zooki]

When you say "at partial throttle a smaller vacuum is created", are you measuring before or after the throttle body? You will have more vacuum behind the TB at part throttle than if the TB was wide open, correct? I know in the old school carb days dual plane intakes used a split plenum so there was less mass of air to accelerate into the chambers when the throttle was opened. The trade off was less plenum volume to fill the cylinders at high RPM.

[sierra]

Unless I need the power I stick to the higher gears and use 6th in 60kph limits, 5th for 50kph. Around town 3rd is good for roundabouts and taking turns into sidestreets with 1060rpm to 3200rpm equating to 20kph to 60kph.
In that rpm range it pulls sweetly, without any drama and with good strong torque.

The dyno plots the full throttle power throughout the rev range while partial throttle is, I suspect, far less affected by the torque dip.
If I floor it at 2000rpm it pulls hard and then dies from 3200rpm to 4000rpm when it comes alive again with 5000rpm to the cut out really strong.
However I rarely use full throttle and the same exercise using 1/3 throttle has far less impact[if any] in the 3200 - 4000rpm zone and at 5000rpm up I enjoy increasing the throttle in increments because it's so responsive you can feel every extra bit you give it.

My last 3 fill ups by calculation were 6.61, 6.96 and 6.50 L/100km[36.2mpgUS]

All my resonators are connected and the only mods are Perrin drop in filter and Nameless axleback.

[Turdinator]

It seems logical to me that a greater volume of air between the throttle and ait filter will provide better throttle responce. But i can't see how a larger volume before the filter would improve things unless there is a further restriction before the filter.

[Turdinator]

Originally Posted by sierra

...My last 3 fill ups by calculation were 6.61, 6.96 and 6.50 L/100km[36.2mpgUS]...

Off topic but those are fantastic fuel consuption figures. I don't drive at all for economy but my computer says i am at about 10.5L/100km [22.4mpgUS]

[sierra]

Originally Posted by Turdinator

Off topic but those are fantastic fuel consuption figures. I don't drive at all for economy but my computer says i am at about 10.5L/100km [22.4mpgUS]

That's probably why I rave about the power, it's a surprise when I put my foot down! You must get into it all the time! I reset the average L/100km when I fill up and it reads 0.2L/100km low.

I'm going to start another thread, if I can't find one, about changing the engine oil because it's been cooked. So I do give it some too.

[NickFRS]

I average 30MPG..... 36 is awesome!

[Turdinator]

Originally Posted by sierra

That's probably why I rave about the power, it's a surprise when I put my foot down! You must get into it all the time! I reset the average L/100km when I fill up and it reads 0.2L/100km low.

I'm going to start another thread, if I can't find one, about changing the engine oil because it's been cooked. So I do give it some too.

Haha, i enjoy driving my car thats all i will say. Incidently i don't feel the car is underpowered. If the torque dip was filled in i would think it was a great engine for this car.

Sorry for going off topic.

[sierra]

Originally Posted by Turdinator

Haha, i enjoy driving my car thats all i will say. Incidently i don't feel the car is underpowered. If the torque dip was filled in i would think it was a great engine for this car.

Sorry for going off topic.

I agree. This is one sweet car and the engine is a perfect match apart from the torque dip. Any mods to improve it, without going to FI are of interest to me, that's why I follow threads like this.
I wonder if those that fit a turbo are really happy with that route afterwards? They have more torque and power but the delivery, once it spools up, is quite linear in delivery and engines under boost are quiet.
I much prefer to hear it working it's guts out, at least when it sounds good and this motor while NA delivers and completes the race car package.

[Jesse]

recently went from injen intake to TRD airbox/intake. much more smooth with fa20clubs tune. less noise, but its drives better. i would like one of the upgraded snorkels mentioned earlier in the thread, i think i would work nice with the trd box.

[nix]

I checked today and my average is at 13.8l/100km (17 MPG). Oops.

I am going to leave the main resonator on my car. I took the snorkel off when installing my FMIC but plan to replace it with aftermarket eventually.

I still need to do some shrouding tweaks around the fmic/radiator/heat exchanger before I'm totally finished with the intake.

[Kodename47]

Originally Posted by Turdinator

It seems logical to me that a greater volume of air between the throttle and ait filter will provide better throttle responce. But i can't see how a larger volume before the filter would improve things unless there is a further restriction before the filter.

I don't see that it would matter particularly just before/after the filter as it's within the same enclosure. It's not like there's a much of a pressure difference before/after the filter

[sierra]

Originally Posted by Kodename47

I don't see that it would matter particularly just before/after the filter as it's within the same enclosure. It's not like there's a much of a pressure difference before/after the filter

I agree.
It's the volume after the throttle valve that's critical and the only way it could be important before that is if there's a restriction back down the line.
Why would they engineer that in?