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The mkiv Supra Owners Club

24bhp gain from after market induction kit!?


tucky40
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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?

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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 :innocent:

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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

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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 :taped:

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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?

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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 :p

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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 :p

 

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?

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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.

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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;)

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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).

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