Drilled raceland induction's why?

[saxova]

As title, why are people doing this? Doe's it help any?

Looks like it would 'suck' in hot air from the bay.. Wouldn't drilling a hole in the bottom and adding a cold air feed be more beneficial?

[rick_VTR]

+ 1.

if it was better to have holes in the top then they would be like that from the factory.

i dont get it, it already has a cold air feed of its own, why drill more holes? i cant see it even making a difference.

[KamRacing]

I thought people were drilling holes in the front slam panel? Thats where the cold air comes from....

[rick_VTR]

nah ive seen a few with 3 or 4 holes drilled in the front/top of the carbon/plastic cover part.

will try and get some pictures now to explain.

EDIT: near the bottom of the second page of this thread, this guy has done it to his.

http://www.saxperience.com/forum/showthread.php?t=342683&page=2

[Paul]

I've seen people do this, pretty pointless.

Only thing i can think of is it might make it abit louder?

[rick_VTR]

I've seen people do this, pretty pointless.

Only thing i can think of is it might make it abit louder?


yeah i could see that posibly hapening, but still, surely it would decrease performance? as the air is less free flowing and not directed straight towards the filter, it would be escaping with 3 big holes drilled in the top of it?

[Mike_420]

one of my mates mates says like you can drill holes in the exhaust muffler and it adds at least 5bhp ?

worth a try i suppose..

[Paul]

yeah i could see that posibly hapening, but still, surely it would decrease performance? as the air is less free flowing and not directed straight towards the filter, it would be escaping with 3 big holes drilled in the top of it?

Yeah it would decrease performance.

An induction kit on its own isn't going to give you much 'performance' anyway, doubt you'd even feel a difference in power in all fairness.

[rick_VTR]

yeah, ive got the K&N 57i open cone with cold air feed and it doesnt really make much difference, just sounds louder, only time i really notice it is at higher speeds, say 50/60mph and i go to pull away or overtake, can really feel the cold air feed working and the inlet sucking in the cold air, but driving under 50mph and no difference at all.

[clubbz]

http://www.saxperience.com/forum/showthread.php?t=339515&highlight=raceland

My best guess :)

[blackie_2k5]

yeah, ive got the K&N 57i open cone with cold air feed and it doesnt really make much difference, just sounds louder, only time i really notice it is at higher speeds, say 50/60mph and i go to pull away or overtake, can really feel the cold air feed working and the inlet sucking in the cold air, but driving under 50mph and no difference at all.

really?

[DanTvts]

I agree with the hardly making any difference comment, when i fitted my simota back on after putting the cams in, it seemed a fair bit louder, didnt really like it so ive just got a green panel filter now with a half decent cold air feed, a lot quieter and doesnt seem to have affected much, and is slightly better when sat in traffic, because the filter is further away from the manifold i suppose.

[Darkslider]

really?

I would guess it's just the extra noise making it feel like the car's pulling harder, you won't be getting that much more air in from an open cone filter regardless of cold air feed. If you want the air to be properly forced into the filter at high speed you need a fully enclosed induction kit with a ram air type airbox like the Raceland. Saying that, I fitted my Raceland straight after driving on a standard airbox and I couldn't honestly say I noticed a massive performance increase, although the noise was nicer.

The linked thread shows that a Raceland induction kit with a big filter (like mine) will have a 7 bhp increase. 6-7 bhp isn't a lot and you'd certainly be hard pushed to notice it I think!

[Saxovch22]

It was me that done it first then I sold mine to Jonesy on here and since then a few people have done it

[Darkslider]

Thought I'd bump this as I had the grill off my MK1 vts today. Had a look at the general placement of my Raceland airbox and where it sits the majority of the airflow into it is completely blocked by the slam panel. A bit is channeled up into the far left corner of the airbox via the plastic scoop that's in the top of the fan housing but nowhere near as much as it could be.

So out came the angle grinder and, rightly or wrongly I decided to cut out a 15cm x 5cm rectangular slot out of the panel, directly behind the opening of the smiley grill and in front of the airbox. You can now clearly see into the airbox if you squat down and peer through the grill, so at speed a massive amount of air will be forced into the induction kit and the filter. Doesn't seem to be any noticeable loss of strength in the slam panel, the bonnet still closes and opens fine and unless you know where to look it's difficult to see it's even been done. The only potential problem I can foresee is water ingress into the airbox may be increased, not sure how I can tackle this, perhaps some relatively fine but strong mesh behind the grille to disperse splashed water and heavy rain. If I fit the airbox so it doesn't quite meet the slam panel at the bottom there should be room for water to escape.

Will get some pictures if anyone's interested!

[saxova]

I've noticed that the slam panel block's alot of airflow too.. Would like to see this done!

[Jay_]

thats what kam said at the top of the thread :y:

[Darkslider]

thats what kam said at the top of the thread :y:

Yep but wasn't until I looked at it properly it became obvious what to do. May be different on a MK2 vts, and if you wanted to do a tidier job you could probably cut several holes with a 40mm hole cutter but you wouldn't have quite the same amount of airflow. I've just cut a big 6 x 1 inch rectangular hole out which isn't pretty but should do the job.

[Darkslider]

Other thing I've thought of is I've got a standard K&N filter in my Raceland box which has the shiny silver front on it, if I swapped it for a twin cone filter a lot more air would get forced directly into the centre of the filter, as opposed to having to swirl round and in the sides. Nitpicking maybe but it could add another BHP or two, and it all adds up!

[Tontsy]

a bhp or two, will never make any difference on its own.

if people want to "force" more air in... do it properly and go forced induction!

[-shuggles-]

Jonothans thread shows some very good results but if you are going to all this effort in finding 1-2bhp why not either loss some weight or spend a bit more money to release power

[Darkslider]

Good point, but I had a day off the weather was nice and I was quite happy tinkering with it on the driveway, so five minutes with the grinder wasn't a big deal. In real terms it will probably give the same gains as removing the back seat or something but we'll see!

I'm planning on spending more money in due course anyway so this will all help!

[-shuggles-]

Good point, but I had a day off the weather was nice and I was quite happy tinkering with it on the driveway, so five minutes with the grinder wasn't a big deal. In real terms it will probably give the same gains as removing the back seat or something but we'll see!

I'm planning on spending more money in due course anyway so this will all help!

just take the filter off and have a bare throttle body.