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Apr 19, 2014 17:07:10 GMT
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Any advantage apart from the sales pitch? Currently running a 2.0 n/a 924 with a k&n panel filter in the og air box less the elbow. Any advantage on an induction kit with the cone type filter??...apart from looks noise etc (neither of which are selling points tbh)....performance though??
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Apr 19, 2014 18:46:30 GMT
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On a standard engine - not really. If you're upping the performance then perhaps.
Not many car makers were stupid enough to make the OE airboxes restrictive!
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Apr 19, 2014 19:18:16 GMT
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you would be surprised, they have noise to think about too.
it varies greatly, some make not one jot of difference, where some I have seen 10bhp from, you'd need to find some guys that know about your specific application.
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Apr 19, 2014 20:14:59 GMT
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True they do have to consider noise but you're right, I would be surprised to see 10bhp from an induction kit unless the old filter was clogged.
Truth be told I don't think I've ever seen a convincing back to back rolling road test on an otherwise standard motor. I'm not saying it can't happen but speaking as I find in most cases it does pretty much nothing.
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Apr 19, 2014 20:35:32 GMT
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Apparently they don't do much for our na engines, have you removed the elbow thing off your airbox yet?
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'73 Commer Campervan under full restoration, '83 VW T25 Doka under partial restoration to become rolling project, '04 Saab 9-3 Vector Sport modified and certainly not finished...
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Apr 19, 2014 21:16:48 GMT
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Apparently they don't do much for our na engines, have you removed the elbow thing off your airbox yet? Yeah the elbow's off and running a k and n panel filter and enlarged throttle body, no issues with the set up as it is, was just wondering if there were any performance gains to be had from the open cone type set up?  |
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Apr 19, 2014 21:26:41 GMT
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Best person to ask is the colonel on the porsche 924 owners club forum, he races them so should be able to help you.
Mind sharing the info on enlarged TB?
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'73 Commer Campervan under full restoration, '83 VW T25 Doka under partial restoration to become rolling project, '04 Saab 9-3 Vector Sport modified and certainly not finished...
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stealthstylz
Club Retro Rides Member
Posts: 14,832
Club RR Member Number: 174
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induction kits??stealthstylz
@stealthstylz
Club Retro Rides Member 174
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Apr 19, 2014 21:33:54 GMT
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Induction noise is addictive, therefore the car will go faster as you'll have the pedal to the floor at every opportunity.
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Apr 20, 2014 10:07:46 GMT
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Ram air helps. But the design for ramair has to be specially configured according to the correct design principles. The ideal shape is like this.  It's a round pipe which has been ovalised, the leading edge has been sharpened. There is nothing around the outside of the intake tube. Basically you have to imagine the air as a solid. When you're doing 60mph is is considerably thicker than when you wave your hand through it a 0mph. The design of the intake tube CUTS a section out of the air and the easiest place for it to go is into your engine. If you try to use a bellmouth design (which I see a lot of) the solid air drags on the bellmouth opening causing turbulance and a low pressure zone which likely has the opposite effect, i.e. less air available to draw in. But to do the above isn't always possible. The highest flowing (and still effective) filters are OEM paper filters. The problem is that they clog up quickly. But they are very cheap. So best you can do with an OEM intake tract is to keep the paper filter and do whatever you can to encourage more air to enter the airbox. |
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120y
Part of things
Posts: 423 
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Apr 20, 2014 10:40:59 GMT
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They have induction kits for my K11 Micra supposed to give 10bhp increase so id get 85bhp as apposed to 75bhp asking £80 for the kit.
Id like to do it at some point they do sound good.
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1996 Renault Clio MK1 1.4 RT Auto
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Apr 20, 2014 11:34:25 GMT
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You'd never get an extra 10hp out of a Micra just by fitting an induction kit lol. I thought you were going to say "I'd like to do it at some point..." so I could sue them for false advertising.
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Apr 20, 2014 15:52:19 GMT
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Ram air helps. But the design for ramair has to be specially configured according to the correct design principles. The ideal shape is like this. And how does the pencil help?  |
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Apr 20, 2014 18:19:18 GMT
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Ram air helps. But the design for ramair has to be specially configured according to the correct design principles. The ideal shape is like this. And how does the pencil help? It draws in the air. Obvious really! |
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Apr 20, 2014 22:35:19 GMT
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Badum - Tish !
(Very good!)
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Apr 21, 2014 11:24:05 GMT
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I found this a wile back wether it's accurate or not I'm not sure Airfilter test but what I no does work is keeping the area around an airfilter cold so ram induction or induction kits that area properly boxed off from the rest of the engine bay |
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Apr 21, 2014 17:31:57 GMT
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I found this a wile back wether it's accurate or not I'm not sure Airfilter test but what I no does work is keeping the area around an airfilter cold so ram induction or induction kits that area properly boxed off from the rest of the engine bay Interesting reading, thank you |
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Apr 21, 2014 17:56:41 GMT
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Apparently they don't do much for our na engines, have you removed the elbow thing off your airbox yet? Ive a 924 n/a what will this do? As to the op question if they did improve airflow/bhp/ect car makers wouldnt spend money on reserch and development of there engines and just use ramair/k&n kits. Ive read that on some cars they will reduce bhp.BMW are a prime example. |
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The louder you Scream the faster we go  |
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Apr 21, 2014 19:23:46 GMT
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Fair point and after reading the link that barrytrotter posted above I may go back to stock again to try it. Was rolling roaded 2 years ago and was putting out 129 bhp, which on an original engine that's 33 years old and came out of the factory at 125 bhp aint bad I don't think |
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Apr 21, 2014 19:51:18 GMT
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I think it's quite plausible aswell to be honest.a paper filter is say 1mm thick paper if that,its just concertinad up so is still only 1mm thick along it,yet a foam filter is 1 inch thick plus oiled.
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ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
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induction kits??ChasR
@chasr
Club Retro Rides Member 170
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Apr 22, 2014 20:27:45 GMT
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Depends on the car IMO.
On my 306 GTi-6 it worked better (more low down torque) with the original filter system, especially around town. MPG went up too! My 106 actually ran a little better on the induction kit I hate to say, but hit the sweet spot with a Janspeed decat exhaust system and the stock airbox (torque and top end power (more than I had with the induction kit)).
My 944 was running on a horrid air filter (it was probably one of the worst filters I have recently seen). A fresh Mahle item gave it a bit more pep when I gave the car a full service, although admittedly it does seem slightly (not as much as the service mind you) perkier on the K&N panel filter, in terms of lagging slightly less and feeling a little crisper. The exhaust note also has a more definite bang in between gearchanges now upon give it the beans which of course probably makes the filter change worthwhile over the other factors for me :lol:.
However, in most cases, people notice a difference because the old filter which was removed was in a shocking state.
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