tucky40 Posted February 28, 2008 Share Posted February 28, 2008 This website claims they gained 24bhp on a bpu car with a blitz SUS power induction kit: http://www.importtuner.com/powerpages/0111it_1997_toyota_supra/index.html The other claims look sensible so why do we keep claiming stock in best? has anyone done any direct comparisons that we know of? supra forums in the US dont seem to be as dismissive of aftermarket filters as we are so have we got it wrong? they claim the stock box is reasonably restrictive. p.s I appreciate ducting is important and on the stabdard box filter this feed is going to be cold but as long as this is done well on the aftermarket kit wont gains be made? Link to comment Share on other sites More sharing options...
Daston Posted February 28, 2008 Share Posted February 28, 2008 Toyota spend millions of £ on car parts. This includes research and testing. If they felt that a big mushroom/cone filter was better then I am sure they would have put one on there in the first place Link to comment Share on other sites More sharing options...
mikeyb10supra Posted February 28, 2008 Share Posted February 28, 2008 Think logically about it, and then think about there claim Link to comment Share on other sites More sharing options...
Nic Posted February 28, 2008 Share Posted February 28, 2008 The second pic down shows the car on the dyno, with the bonnet up, in front of the car will be a couple of huge great fans blowing air towards the engine bay. One of the reasons for not using an induction kit is that it sucks in hot air from the engine bay. A car may see a slight increase of hp on a dyno with an induction kit fitted (24bhp that's a joke right?), but it would be a different story on the road. ...and the thing, they're selling parts, lying through their teeth and want you to give them your money ps. if you still want one I can do them cheaper Link to comment Share on other sites More sharing options...
Firestorm Posted February 28, 2008 Share Posted February 28, 2008 hi nic, so if i was to change my air filter for a better one what would ur recommend- or stick with OEM- i hear a lot of talk over the Apexi ones? i see that a induction kit is pointless so reallywith that lot ur not raelly increasing hp with all that then,. Link to comment Share on other sites More sharing options...
Nic Posted February 28, 2008 Share Posted February 28, 2008 hi nic, so if i was to change my air filter for a better one what would ur recommend- or stick with OEM- i hear a lot of talk over the Apexi ones? i see that a induction kit is pointless so reallywith that lot ur not raelly increasing hp with all that then,. I'd personally stick with stock airbox and either stock or TRD filter element. If you want to fit an aftermarket induction kit I'd go with one of these kits for the Supra. Power Enterprise Air Impulse II http://power-enterprise.co.jp/english/intake/img/inp_top.jpg http://power-enterprise.co.jp/english/intake/img/1.jpg Blitz Sonic Power http://www.blitz-uk.co.uk/images/products/productimages/main/Sonic_P1.jpg http://www.blitz-uk.co.uk/images/products/productimages/main/SONIC_P2.jpg Link to comment Share on other sites More sharing options...
Firestorm Posted February 28, 2008 Share Posted February 28, 2008 I'd personally stick with stock airbox and either stock or TRD filter element. If you want to fit an aftermarket induction kit I'd go with one of these kits for the Supra. Power Enterprise Air Impulse II http://power-enterprise.co.jp/english/intake/img/inp_top.jpg http://power-enterprise.co.jp/english/intake/img/1.jpg Blitz Sonic Power http://www.blitz-uk.co.uk/images/products/productimages/main/Sonic_P1.jpg http://www.blitz-uk.co.uk/images/products/productimages/main/SONIC_P2.jpg yeh im thinking TRD filter element- how much are you looking at for one of these. and wont the inducion kits do nothing hense the start of this thread Link to comment Share on other sites More sharing options...
ShamelessTT Posted February 28, 2008 Share Posted February 28, 2008 yeh im thinking TRD filter element- how much are you looking at for one of these. and wont the inducion kits do nothing hense the start of this thread Link to comment Share on other sites More sharing options...
juanchan Posted February 28, 2008 Share Posted February 28, 2008 I agree with the comments regarding sucking up hot air from the engine bay, but: If you're doing say 4000rpm, that's 4000 x 3 litres of air you're sucking in every minute. Per second that's about 200 litres. You're going to be emptying the engine bay of air very quickly at that rate! My question is, will the air that replaces it really have time to gain any heat before it is in turn drawn into the engine? Link to comment Share on other sites More sharing options...
Firestorm Posted February 28, 2008 Share Posted February 28, 2008 I agree with the comments regarding sucking up hot air from the engine bay, but: If you're doing say 4000rpm, that's 4000 x 3 litres of air you're sucking in every minute. Per second that's about 200 litres. You're going to be emptying the engine bay of air very quickly at that rate! My question is, will the air that replaces it really have time to gain any heat before it is in turn drawn into the engine? hhmm good point. however i wasnt sure it was that straight forward. for instance when u lift the hood when u stop after blitzing it for a while its theres shed load of heat coming from the engine bay- surely there isnt enuf displacement of air even if ur traveling fast. as far as i was aware depening on setup- the air filter is ducted from the front as as u travel the air goes straight up frm the front the car- where as a induction kit is place slight more inside the engine bay. so i dunno bud i think that u cant cool the air that quickly unless u have a piece of specalised eqipm,ent to do that. or a fridge Link to comment Share on other sites More sharing options...
juanchan Posted February 28, 2008 Share Posted February 28, 2008 hhmm good point. however i wasnt sure it was that straight forward. for instance when u lift the hood when u stop after blitzing it for a while its theres shed load of heat coming from the engine bay- surely there isnt enuf displacement of air even if ur traveling fast. as far as i was aware depening on setup- the air filter is ducted from the front as as u travel the air goes straight up frm the front the car- where as a induction kit is place slight more inside the engine bay. so i dunno bud i think that u cant cool the air that quickly unless u have a piece of specalised eqipm,ent to do that. or a fridge I was meaning more will it gain temperature from ambient as opposed to actually cooling it prior to using it Obviously when stationary the air will be hot too. The engine will be hot, but if the air is being sucked through the engine bay from outside at that rate, will it really gain that much temperature before reaching the combustion chambers? Link to comment Share on other sites More sharing options...
Matt H Posted February 28, 2008 Share Posted February 28, 2008 Yeah but teh SUS filter is so pwritty! Link to comment Share on other sites More sharing options...
Animal Posted February 28, 2008 Share Posted February 28, 2008 I don't know about the technical side of thinds, but when I replaced the HKS mushroom on my N/A with a stock airbox, the difference was incredible. Throttle response was greatly improved, and driving in general was a lot smoother. It actually felt like I'd gained an extra 50 horses it was that much better. Link to comment Share on other sites More sharing options...
marc_p Posted February 28, 2008 Share Posted February 28, 2008 I'm sticking stock and just getting a k+n panel filter. Link to comment Share on other sites More sharing options...
Firestorm Posted February 28, 2008 Share Posted February 28, 2008 so its a case of making your engine bay look impressive rather than actually techinical advancement then LOL! Link to comment Share on other sites More sharing options...
marc_p Posted February 28, 2008 Share Posted February 28, 2008 so its a case of making your engine bay look impressive rather than actually techinical advancement then LOL! Think you've just hit the nail on the head. Link to comment Share on other sites More sharing options...
Firestorm Posted February 28, 2008 Share Posted February 28, 2008 Think you've just hit the nail on the head. and to be fair how many people are impressed when u open the hood and uve got this massive induction kit. make its look good and people think your car is uber fast- whereas it just for show- but that our little secret lol Link to comment Share on other sites More sharing options...
Animal Posted February 28, 2008 Share Posted February 28, 2008 and to be fair how many people are impressed when u open the hood and uve got this massive induction kit Well, (a) if its a club meet, then no-one and (b) I've got an N/A, so I don't open the bonnet unless I have to, lol. Link to comment Share on other sites More sharing options...
Firestorm Posted February 28, 2008 Share Posted February 28, 2008 Well, (a) if its a club meet, then no-one and (b) I've got an N/A, so I don't open the bonnet unless I have to, lol. A. 100% correct- take it off lol B. 100% correct- keep it shut LOL Link to comment Share on other sites More sharing options...
marc_p Posted February 28, 2008 Share Posted February 28, 2008 Well, (a) if its a club meet, then no-one and (b) I've got an N/A, so I don't open the bonnet unless I have to, lol. Just do what I do and tell them the turbo is hidden in a secret compartment and you went for one of them "silent" dump valves, it works 0% of the time 100% of the time;) Link to comment Share on other sites More sharing options...
SimonB Posted February 28, 2008 Share Posted February 28, 2008 I agree with the comments regarding sucking up hot air from the engine bay, but: If you're doing say 4000rpm, that's 4000 x 3 litres of air you're sucking in every minute. Per second that's about 200 litres. You're going to be emptying the engine bay of air very quickly at that rate! My question is, will the air that replaces it really have time to gain any heat before it is in turn drawn into the engine? Yes, because the main source of that air is air that has gone through the radiator and other coolers at the front of the car (and FMIC if you have one). Link to comment Share on other sites More sharing options...
colsoop Posted February 28, 2008 Share Posted February 28, 2008 Go for a drive in summer with an unshielded induction kit then come back and ask that question Link to comment Share on other sites More sharing options...
ivan Posted February 28, 2008 Share Posted February 28, 2008 I'm sticking stock and just getting a k+n panel filter.Exactly what I've done. Link to comment Share on other sites More sharing options...
_Shane_ Posted February 28, 2008 Share Posted February 28, 2008 I remember seeing a thread years ago and all the big name induction kits were fitted to one car at different times and dyno'd. Apexi came first Will try and dig out the thread Link to comment Share on other sites More sharing options...
Axle Posted February 28, 2008 Share Posted February 28, 2008 Im sceptical about aftermarket boxes too. For whatever gains you may make, if any (other then an annoying drone) making your engine less reliable by sucking in dirtier air is not a good thing. I remeber a huge fuss that was made over the CDA airbox because it 'uses Formula 1 technology'. Link to comment Share on other sites More sharing options...
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