cone filter heat shield/proofing

[wrightyHGT]

Hi peeps....just after some advise for heat shield/proofing of cone filter on mk1 bravo....but could relate to any car with cone fitted.

Here's a pic of my current set up.

Plan on replacing filter with a jetex cotton cone which seems to have good write ups.
http://www.fastcar.co.uk/2012/05/04/performance-car-air-filter-test/7/
Do like the ITG foam jobbie but too impractical.

But want to provide a decent cold air flow and offer some heat protection at same time.

Cold Air flow first: Easy option is to use standard air feed from above radiator and pipe to filter and also thought about using the inner arch vent but popping a little filter over it.
Another option was popping the N/S fog light out and using that as cold air feed as its well away from engine heat, but could also be put back to factory at a later date if needed.

Heat shield: The filter is well placed in the wing but still open to heat soak from the engine. I want to construct a heat shield enclosure in the wing but unsure of what material to use.

After a search found Aluminium based material...
http://www.nimbusmotorsport.com/ProdShop.asp?category=252

Used on engine bay side of wing and on front under bonnet stay clip to enclose the filter. With cold air feed fed through from both front of car and inner wheel arch vent.

Loads of heat proofing on market but wanted something rigid that i could form rather than the stick on stuff....any left thought i might try make a form of my ex manifold heat shield too.:yum:

Is there anything else worth doing while at it, lagging rest of intake pipes etc....
Have a stainless magnex system and FCperformance chip also fitted. Just thought the next step would be to scavenge a miniscule amount from efficiency.

http://strikeengine.com/air-filter-heat-shields-3

Just after ideas what else is out there or what other people have done.

Cheers for taking time to trawl through all that.

 

[fingers99]

I'd forget about heat soak.

I'd forget about lagging.

To remove hot air from under bonnet, improve air flow through it with vents (not scoops!).

 

[wrightyHGT]

To remove hot air from under bonnet, improve air flow through it with vents (not scoops!).

thanks for your reply but i dont think i mentioned "Scoops!" once in my post.

I was planning on using the inner wing "vent" as i mentioned but wasn't sure if it mattered where the main cold feed came from and or if i needed to protect the filter. If i needed to what was the best way.

I understand that you need to vent air out,but you also need a supply of cold air to start with.

I purchased the car running but in need of upkeep, it had split piping and knackered cone,maf to start with, i've replaced what i could to the best of my funds/abilities at the time and now want to improve on the job.

How else do i VENT air from under the bonnet ????

Sorry as i seem to have offended you by asking such a stupid question.

 

[fingers99]

Scoops because a lot of folk (but not necessarily you) think that's the way to do it.

My best guess is that there's enough air flow to the cone. Popping the odd vent in (or on) will simply improve things by increasing airflow.

As long as the filter is high enough, it should be fine (otherwise there's a possibility of going hydraulic if you hit a big enough puddle). In any event, any kind of direct ducting to the filter is likely to cause a lot of turbulence. My guess is that there's plenty of cool air from under the car (at least, if flow can be established).

HGT isn't going to present the kind of heat management issues that a turbo would, so gains are likely to be very small.

The Alfa folk seem to think that using cone filters has a damaging effect on the MAF on the 1.8 and 2 litre Alfa/FIAT t/c 16v engines. Dunno if there's any truth in this, but it would be worth checking out.

 

[wrightyHGT]

folk seem to think that using cone filters has a damaging effect on the MAF . Dunno if there's any truth in this, but it would be worth checking out.

Indeed the standard paper filter is 99 odd percent efficient, a sports panel filter reduces this to 70 odd percent and a cone markably more so its no surprise that all those extra particals being sucked through by a filter big enough to envelope any small mammal or passing child does not have a damaging effect further down the intake.

Its often the case of finding the balance between flow and filtration/efficiency.

So this is what i'm trying to achieve......bingo

You've got me on the right path...buts what is the best proven result for the hgt.....(I do like the sound of a cone on the 20v lump, be a shame to loose it.:nono....

 

[dave]

you don't need to shield that where it is, let heat out by cutting gaps in seal between bonnet and bulk head

 

[wrightyHGT]

Its funny cause at the mo got a dent in middle of bonnet at front near catch and it has warped the passenger side up a gnats c*ck so i do have really good airflow/venting at mo...

And thinking bout the MAF it has large square grid on intake to catch bigger debris so could this be changed to a very fine mesh and not destrupt any thing as already have increased flow.???:shrug: