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Air filter hole in bonnet


Andy - a15cro

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The website I've seen today didn't have a hole In the bonnet for the air filter. I like the look of the exposed filter. Is there a reason it's not got one? And could I put one in if I buy the car? First time posting pics.

It's a 2.0 Zetec 170 with jenveys

D2D3EBF8-BD09-4989-B459-0E75AE36D403_zps

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There's no reason why you can't cut a hole in the bonnet but if they fit under the bonnet there's no need, but it can be changed if you wanted.

Andy

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They fit under, I just didn't know if there was a reason why they didn't.

Just me tinkering before I even but one lol!

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There are two reason for cutting holes in the bonnet

  1. It don't fit - in the days of carbs, inlet manifolds and air filters, it wouldn't all fit in.
  2. Cool air can produce a smidgen more power.  Most tin tops suck their air from a wheel arch or behind the grill
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I understand option 2, I had forced air induction on my MPS.

I thought there may be a reason if it's got the jenveys, and the filter was not sticking out on this one, unlike others I've seen.

Suppose it's no biggie, I'm just buzzing from what I saw today!

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All depends on inlet manifold, throttle bodies and trumpets. If all are short they fit under the bonnet, if long they don't so you need to cut a hole.

Various options available and various opinions as to benefits of said options.

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If you did cut a hole in that one, they wouldn't poke out anyway.

You could always get a V8 style bonnet?

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I thought that Russ on closer inspection of the pictures. Its no biggie to be honest, just me being hyper!

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Get some of Micks flared carbon side panels if you're desperate to start hacking up the bodywork! :d

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Longer ram pipes on the throttle bodies, which then require a deeper air filter are the usual reason for needing to cut the bonnet; this then has the added benefit of more cool  air available to the throttle bodies.

 

But, in addition to the cost of the trumpets and filter, you then need to figure in the cost of a bit of rolling road tuning to tweak the fuel injection maps for modified induction bits.

 

Is it worth it; well the people I know that have done it have generally thought so. But it's not just a mornings work with a Dremel!

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ooohhhhh now I do like a nice bit of carbon bling.

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Just to play devils advocate for a moment....

 

Chopping the front of the tub down for the carbon sides is quite a big mod. With the orange car, it does look like you're perhaps paying top dollar for one of that age with really tidy bodywork. If your plans include much modified body work, I'd be tempted to look for a mechanically sound, but poorer condition bodied car and save yourself a few grand on the purchase price. Something that's had an engine change leaving odd shaped holes in the tub is perfect where you want to put the "very nice" carbon side panels on. - You can get the seller down on price cause of the extra holes, yet you'll be cutting those bits off anyway!

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I won't be doing anything drastic straight away. I'd need to see what I had first.

I should calm myself down a bit! Lol

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