ste91 Posted December 29, 2008 Share Posted December 29, 2008 I noticed this a long time ago but I thought I might aswell ask anyway, after a certain RPM (pretty high definately past 5k or so) the sound changes from a deep roar to sort of a fairly deep "tinny" - almost similar to a VTEC sound but different ;) I was wondering is this sound normal or not? Does anyone else's 4EFE do this? Breathing mods I have are rolla mani and a open filter coming off a bit of alu pipe.Or could the sound be something different altogether - maybe at high RPM the engine is shaking the shit out of something causing it to rattle and make a noise? Quote Link to post Share on other sites
Si@Fiske Posted December 29, 2008 Share Posted December 29, 2008 erm nah, cant say mine does matey lol.get it checked out ;) Quote Link to post Share on other sites
Mikey Jay Posted December 29, 2008 Share Posted December 29, 2008 Possibly because they're DOHC maybe, second cam kicking in maybe?(could be talking rubbish, as am a noob when it comes to engines)Only thing I can think of Quote Link to post Share on other sites
ste91 Posted December 29, 2008 Author Share Posted December 29, 2008 I don't think it's anything to do with the cams (atleast I don't think so) it's just wierd that the sound changes like it does, the thing about VTEC was a bit of a joke so don't take it too seriously. ;)I can't think of anything though, the engine is running fine and it was only a few months ago that I fully serviced it including oil flush & change. I thought it would be because of the air filter setup (just having a different sound) but it did it before on the airbox anyway. Quote Link to post Share on other sites
Asad Posted December 29, 2008 Share Posted December 29, 2008 I think i know what you mean when going from 60 (3k) to 70-80 i can hear a kinda of a deep roar from the mani sounds fooking amazing. Must try and be chav n video it or something lol ;) Quote Link to post Share on other sites
montanajr Posted December 29, 2008 Share Posted December 29, 2008 Possibly because they're DOHC maybe, second cam kicking in maybe?(could be talking rubbish, as am a noob when it comes to engines)Only thing I can think ofDOHC means the engine has an seperate camshaft for exhaust and intake as opposed to just one, wouldn't be causing the sound. VTEC makes the changeover sound as when you hit a certain RPM a larger lobe on the intake cam is engaged...no idea what the noise you're hearing is mate! But if it sounds nice, enjoy it! lol Quote Link to post Share on other sites
Asad Posted December 29, 2008 Share Posted December 29, 2008 Mine makes odd noises but...i just turn everything down on the motorway n listen if all is well keep an eye on dash lights etc put up the music n heater + keep on rolling ;) Quote Link to post Share on other sites
Big_al_ep91 Posted December 29, 2008 Share Posted December 29, 2008 mine makes the same noise at high revs, like you say about 5k or so. think its just the set up as i have a 'rolla mani and it didnt make this noise before i fitted it, also when im doing over a certain revs if i lightly press the throttle, wen it sucks it sounds bit like a turbo whistling ;) i love it ;) Quote Link to post Share on other sites
Asad Posted December 29, 2008 Share Posted December 29, 2008 ^^ Thats the noise a better filter made mine louder...i think its just the shear ammount of air that its sucking in which causes it. Quote Link to post Share on other sites
Bourkey Posted December 29, 2008 Share Posted December 29, 2008 Idrees' sounded like this at the last Hudds meet. Sounded awesome on his SR. He has a 5Zigen back box on his as well. Yum Yum ;).Bourkey Quote Link to post Share on other sites
Sparky Posted December 29, 2008 Share Posted December 29, 2008 Its perfectly normal ;)All 16v cars have the "change over" sound at high revs, its to do with the power delivery being at the top end of the revs ;) Quote Link to post Share on other sites
Glanza-Love Posted December 29, 2008 Share Posted December 29, 2008 above 5k in any car given it the shoe sounds awsome because its going into higher rev range.. like sparky says, completely safe and sounds sex Quote Link to post Share on other sites
Idrees Posted December 29, 2008 Share Posted December 29, 2008 Idrees' sounded like this at the last Hudds meet. Sounded awesome on his SR. He has a 5Zigen back box on his as well. Yum Yum ;) .BourkeyThanks dude. Yes since I have fitted the 5Zigen exhaust (which came off a CRX Vtec) and I must say mine sounds like a mini Vtec thingy hehe ;) it's too addictive though! Quote Link to post Share on other sites
ste91 Posted December 29, 2008 Author Share Posted December 29, 2008 That's alright then good it's nothing to worry about. ;)High revs and then let your foot off, the overrun sound is great. Quote Link to post Share on other sites
Sparky Posted December 29, 2008 Share Posted December 29, 2008 When giving it some and backing off for a few secs and quickly banging back on the loud pedal sounds immense in my car, gives a nice bang and a flame sometimes ;) Quote Link to post Share on other sites
Idrees Posted December 29, 2008 Share Posted December 29, 2008 Or when slowing down after heel and toeing just tapping the accelerator lightly to hear it go pop pop pop! Quote Link to post Share on other sites
Mikey Jay Posted December 29, 2008 Share Posted December 29, 2008 Damn you all, my exhaust doesn't popUsed to, but after the ECU was reset it hasn't done it since ;)I liked the sound too Quote Link to post Share on other sites
Glanza-Love Posted December 29, 2008 Share Posted December 29, 2008 the glanza popped the other day.. put the boot down switch from 3rd to 4th about 6.5 revs POP!!! i shit my self hehe Quote Link to post Share on other sites
Mikey Jay Posted December 29, 2008 Share Posted December 29, 2008 Now you're showing off tooMine can't even do 6500rpm ;) ;) Quote Link to post Share on other sites
montanajr Posted December 29, 2008 Share Posted December 29, 2008 Mine flames sometimes and after lots of heel and toeing after slowing down from a high speed it pops pretty loud. Love it lol Quote Link to post Share on other sites
Sparky Posted December 29, 2008 Share Posted December 29, 2008 I'll be getting a front exit ^^ ;) Quote Link to post Share on other sites
Galliano Posted December 29, 2008 Share Posted December 29, 2008 The Paseo seems to do it too... seeings as the Galliano has an aftermarket backbox but standard filter - it seems to give a more roar above 4.5k in the Paseo Quote Link to post Share on other sites
Glanza-Love Posted December 29, 2008 Share Posted December 29, 2008 Im not showing off if i were id say i can go to 7... and once the td04's in and i have Emanage ultimate i will rev to 8 odds ;) Quote Link to post Share on other sites
Bourkey Posted December 29, 2008 Share Posted December 29, 2008 Mine pops and bangs. It has flamed very large once shifting down form high speed on Snakes Pass ;). Mine also sets car alarms off, makes dogs bark, and just genrally sounds like hell is breaking loose behind me. Silencers pfffff who needs them ;).Bourkey Quote Link to post Share on other sites
5T4R7ET N/A Posted December 29, 2008 Share Posted December 29, 2008 When giving it some and backing off for a few secs and quickly banging back on the loud pedal sounds immense in my car, gives a nice bang and a flame sometimes ;)Did u re set yur e.c.u u wen u put your exhaust on. By taing it off for 30 ins Quote Link to post Share on other sites
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