kh4nh

Read this and tried this mod today. The intake sounds awesome now!

http://www.edmunds.com/lexus/rc-f/20...-solution.html

Joe Z

iTrader: (10)

Too complicated..!!! LoL

Unplug the harness clip on the solenoid...

Welcome to 2008

Joe Z

johnnyreb

OK Joe, where's the Pics on this Mod!

Joe Z

iTrader: (10)

Pictures worth.....




Unplugged leaves secondary flap open all the time..


Joe Z

Dbcooper13

It's literally a five second mod.
vacuum cap from advance Auto Parts.
I also have resonators taken off. Car sounds amazing now.

Joe Z

iTrader: (10)

^^^ But the plug disconnect takes one second and no trip to the store..

Joe Z

RCFormante

iTrader: (1)

I read that you will lose hp of this mod because of heat soak, is it true?

johnnyreb

RCF500, you just HAD to go Rain on Everybody's Parade Didn't You! Lol! Hopefully it Doesn't! I'm sure JoeZ or somebody else will let us know For SURE!

Joe Z

iTrader: (10)

LoL..

We found in the hot months.. The car didn't launch as well with the Flap always open..

Sounds *****ing..!!

But remember SOUND increase does not always equal HP gains

Sometimes in the cooler SoCal months, I unplug it to spice things up a bit

But as soon as it's hotter than 70, it's plugged right back in.

Joe Z

RCFormante

iTrader: (1)

Lol...just trying to get the most power of out the car, even though my car is still in the shop! I should have it back within two weeks with a new exhaust system and a carbon ceramic brake system, I'm so excited!

Good to know! Thanks!

kh4nh

So the car sounds amazing! I noticed the revs are smoother with the 2nd intake always open. W/o this mod, i've felt around 2k - 3k rpm the car hesitates a little.

Ryanmcd

I thought it was only me, it seems worse when cold and in 2nd gear too

johnnyreb

Man, i Can't Wait for you to get it back so i can SEE it & HEAR it! Definitely show us some Pics & Sounds! I Can ONLY imagine How Excited you're going to be when it's Ready!

rjmalm

I wanted to see if I could record the sound improvement with casio video camera mike and also record a radio shack db meter mike response. So in Sport driving mode (not Sport + to avoid ASC), in manual, did a 2nd gear run up on the street.

With vacuum connected, sound peaks at about 87db while vacuum unconnected went off scale to > 90db. Clearly louder or fuller sound.
Meter response setting was fast so it is not averaged, and weighting was C to get the low frequencies to measure.

I also did a slow run up with the car parked and clearly could not hear the difference but later could see increases in the frequency content. I tapped on the cell phone case at 3k, 4k and 5k rpm. You can see the vertical strips labeled on the frequency vs time plot. Not sure why one see more yellow (high db level) in the connected image (more horizontal and brighter yellow) when greater than 3.7k but there is not major increase but tome in the unconnected at 3.3k and 3.5k. This difference could be difference in where I was holding the cell phone. You can see more cyan in the frequencies 500 to 1500 in the unconnected. Maybe the speed of the run up would allow the difference to show up.

Bottom line I think you can hear the difference in the videos.

Great tip to just pull off the connector JoeZ

ssmoked

Anyone else done this "mod"? Any long term performance differences?