After going to a event where I saw a sprint car (old shaped megane) I have been wondering if anyone has fitted a cold air feed straight into the throttle body. By this I mean basically just wrapping a bit of foam round the intake and then cutting a hole in the bonnet and scooping air in like that? Whats peoples thoughts?
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Bonnet Cold Air Feed
- Thread starter J9HHY
- Start date
It would be miles better in theory
Think of all those twists and turns of the intake track eliminated for a start off.
Issue would be the looks of the bonnet cut
C-VXR, T8 Map 220BHP
you could get a bonnet from a scrappy but tbh, the P1 already had the best induction out of the lot (arguably) and even with you suggestion I doubt you would see more than 2-3bhp max increase and it will prob suck a bit of water up too
ValverInBits
it could be a good idea, but the angle of the TB still means that you need one 90deg bend.
The other issue is filtering. Most good IKs include an enclosed cone filter, with a huge area. your filter will be pi*70^2
all in all, i'd say it's not a great idea with the amount of work you will end up putting in and the look of it when your done.
The other issue is filtering. Most good IKs include an enclosed cone filter, with a huge area. your filter will be pi*70^2
all in all, i'd say it's not a great idea with the amount of work you will end up putting in and the look of it when your done.
Astra GSI, 172, Golf
It would be miles better in theory
Think of all those twists and turns of the intake track eliminated for a start off.
Issue would be the looks of the bonnet cut
yeh your right about the loss of pipework and bends . but a filter has a lot more surface area to it so makes the car easier to breathe . say if u get a induction kit and breathe through it , no problem now get a sponge and try breathing through that you have to suck more . if he could overcome that and get a kit that can be affectivly mounted there then the idea would work well , as you say a loss of pipework etc and a close cold air feed then i could see it working
Ah but your still sucking through the same size straw no matter how big the filter area is
Its the flow and flow temp thats the key area to a good IK set up and of course a decent flowing filter
Take the Maxogen. All it is is a 50 quid foam IK in a carbon box. Why its good is mostly due to where its initial intake is positioned, ie, the coldest available part of the engine behind the headlight
Its the flow and flow temp thats the key area to a good IK set up and of course a decent flowing filter
Take the Maxogen. All it is is a 50 quid foam IK in a carbon box. Why its good is mostly due to where its initial intake is positioned, ie, the coldest available part of the engine behind the headlight
I am not worried about looks, and will get a carbon fiber scoop or something. It only a track car so I don't need to worry about it everyday as regards to water getting in. Its just a idea after seeing it on a sprint car producing 600bhp. The foam they used was only about 10mm thick and not very thick at all. I am sure I can get something that wouldn't resist much, and when i'm going 80mph and the air is flowing straight in I am sure the car wont have to suck to hard
ClioSport 172 Cup
I had this very idea myself. If you do it you should create some sort of aluminium or plastic enclosure around the entire cone filter that shields the filter from the engine bay temperatures, then put a scoop in the bonnet so that it sits just over the top of the filter, this would be a killer setup. Maximum inlet pressure because of no friction or drag from piping and cool air!! + you will hear the engine roar from the scoop!
I`d say just as good as an ITG Maxogen, if not better! I`ve seen alot of V8's and kit cars at our local sprint circuit that run a panel filter actually sitting outside of the engine bay on top of the bonnet, probably not convenient for a road car but the idea is similar!
Sam
I`d say just as good as an ITG Maxogen, if not better! I`ve seen alot of V8's and kit cars at our local sprint circuit that run a panel filter actually sitting outside of the engine bay on top of the bonnet, probably not convenient for a road car but the idea is similar!
Sam
M
mini-valver
This is my effort of getting air into the bay, mines a 1.6 though with a custom plenum set up. Although you could move your battery and run a filter into the same position on an F4R.
M
mini-valver
Yeah but the air on an F4R has to go up down and round, whereas mine goes across and in. Shorter, less restrictive and bigger inlet tract FTW.
182cup & 172 racecar
I ve often thought about this as well,cant see why it wouldnt work.
This is my effort of getting air into the bay, mines a 1.6 though with a custom plenum set up. Although you could move your battery and run a filter into the same position on an F4R.
Hi There
Your set-up looks amazing, who did that? I think I am seeing Angelworks logo there? How are the results, you reduced the runner lenghts, how did that effect the torque and power band. I am thinking about finding a spare plenham and do exactly the same.
Best
Alper
03 RS clio 172 flameR
car will only suck in as much air as it needs when its NA tuned, the only thing you want is colder dencer air, bonnet scoop and throttle bodys would mean a decent power gain, but if you jus had CAFs from somewhere else to throttle bodies it would still fly, for what its worth, its ya bonnet! dont take a hack saw to it.
You can never have enough air
Thats half the battle of the tuning game !! lol More details on that inlet / TB set up please ?
M
mini-valver
This is a 1.6 remember, not the 2.0 although theres no reason you couldnt apply the same plenum to the F4R....! Check out my progress thread in the projects forum "K4M project blog" to save spamming the thread!
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