Bora 4Mo Intake and cold air feed ideas

[Dyldo]

From memory, there was a thread (can't remember if it was here or on vortex) that the guy did a heap of testing and the best airbox design was the stock airbox that came with the car. I think he also increased in breathing the diameter of the intake tube..... I tried a search for you but it didn't come up.... Though if you're just after intake sound, the VF and BMC intakes sound good.

Have seen dyno graphs of Mk5 R32s with after-market intake setups and they have lost power at the wheels over stock though....

Surely we're not going to wade into this terrible part of the discussion? I do hear you, and there is a decent logical argument that speaks to the hours and hours of R&D and testing of the "right" airbox design by a team of folks in white coats at VW. Truth (i believe anyway) is that, although there are guys in labs in white coats and stuff doing testing, there is an equal and powerful element of economic reality by bean counters with pocket protectors and propellor hats that dictate the end unit cost and profit of the cars.

Long way of saying they made a very good airbox that is proven in all weather and conditions and made of durable plastic, but is also easy to assemble at the factory and cost-effective to produce in multiple units.

Why do I mod? For the same reason a surfer puts surf stickers on his cars and stuff - because he likes to and it makes him feel good.

Honestly, I mod because i also buy into the marketing and purported research done by aftermarket folks who do their fair share of research and development and (hopefully) testing of their products. I sure as ****t know that when i fitted the VTDA to the TDI golf I had a documented increase in fuel efficiency, and having no data yet other than butt dyno and the sound i hear there is a definite bang for buck value with the VTDA on the Bora now too. It turns people's heads when i dump it in second or third now.

For me, i'd pay it all again. Its worthwhile. I haven't done baseline dyno tests so i can't prove anything of course, and you may well be right. If you are, i'd kinda not like to know.
"Ignorance is bliss"
-Cypher

[Dyldo]

This is the neuspeed CAI that i have had for about 2.5 years now and i love it!

Looks very neat and toidy, where mine looks Ghetto Funkified - but one question: Where is your air filter?

[JustCruisn]

Here are some pics of my BMC.
It draws air from behind the bumper. I have cut the vent in the bumper to allow better air flow.

This is a Golf but I assume its the same in a Bora.
Much better sound.

[Peter Jones]

Not sure if mine's a kit, but on my Bora the snorkel off the airbox has been removed and a flexy pipe installed. The pipe runs down to behind the foglight blank which has had it's grills opened up.

There's a K&N panel filter in the stock box too.

Dunno if it makes any difference, it's the way the car came to me.

Pete

[Dyldo]

Here are some pics of my BMC.
It draws air from behind the bumper. I have cut the vent in the bumper to allow better air flow.
This is a Golf but I assume its the same in a Bora.
Much better sound.

So how long have you had this installed for? Any issues?

How has your fuel econ gone?

I am simply amazed at the freakishly hot sound it has helped the engine make.

[Dyldo]

Not sure if mine's a kit, but on my Bora the snorkel off the airbox has been removed and a flexy pipe installed.

What in gadzook's is a flexy pipe? I am still shortlisting ideas for how to plumb/funnel a bit more cold air in similar to you.

[JustCruisn]

So how long have you had this installed for? Any issues?

How has your fuel econ gone?

I am simply amazed at the freakishly hot sound it has helped the engine make.

Installed about March 2006, no issues at all. I go easy with the oil. Clean a few times a year more when using dirt roads. It fills up with gravel really well.

Fuel is about the same, 9.5-10 city, 8l/100km country. Cannot comment on Bora sorry.

NFI how it sounds on an NA 6cyl.

[balkanac]

Looks very neat and toidy, where mine looks Ghetto Funkified - but one question: Where is your air filter?

The filter sits (or hangs ) just behind the left grille which doesnt have holes in it. So there is no problems with water getting in, but it still gets cold air from behind the bumper. If i want it to get proper cold air i just take the grille out. You can actually feel the difference. I love the fact that thewre is a grille in front because after about 30,000km the filter was still clean. I replaced it anyway

[gavs]

Surely we're not going to wade into this terrible part of the discussion? I do hear you, and there is a decent logical argument that speaks to the hours and hours of R&D and testing of the "right" airbox design by a team of folks in white coats at VW. Truth (i believe anyway) is that, although there are guys in labs in white coats and stuff doing testing, there is an equal and powerful element of economic reality by bean counters with pocket protectors and propellor hats that dictate the end unit cost and profit of the cars.

Long way of saying they made a very good airbox that is proven in all weather and conditions and made of durable plastic, but is also easy to assemble at the factory and cost-effective to produce in multiple units.

Why do I mod? For the same reason a surfer puts surf stickers on his cars and stuff - because he likes to and it makes him feel good.

Honestly, I mod because i also buy into the marketing and purported research done by aftermarket folks who do their fair share of research and development and (hopefully) testing of their products. I sure as ****t know that when i fitted the VTDA to the TDI golf I had a documented increase in fuel efficiency, and having no data yet other than butt dyno and the sound i hear there is a definite bang for buck value with the VTDA on the Bora now too. It turns people's heads when i dump it in second or third now.

For me, i'd pay it all again. Its worthwhile. I haven't done baseline dyno tests so i can't prove anything of course, and you may well be right. If you are, i'd kinda not like to know.
"Ignorance is bliss"
-Cypher

Mate, settle, I wasn't having a dig at you, I was just making a suggestion! All I was saying is that someone either here or on Vortex had run several different setups on his R32 (which from memory was used as a race car) and his testing had shown the stock airbox was the best for airflow and volume levels WITH a larger intake pipe. Hell, I was going to put a BMC intake on my 1.6, just so it sounded better!! Unfortunately, the alure of a rear swaybar and shocks was more powerfull! I have the stock airbox and a 100mm intake pipe, it sounds better and has more induction noise, but the only thing I have found it did was seemingly makes the engine rev smoother past 2500rpm but this could just be due to the change in the acoustics of it, I can't be certain.

See here:
http://www.vwwatercooled.org.au/newf...ead.php?t=6996

[Peter Jones]

What in gadzook's is a flexy pipe? I am still shortlisting ideas for how to plumb/funnel a bit more cold air in similar to you.

Just a bit of flexible air hose. It's black and sort of a fabric/plastic wrapped over a spring. Looks pretty generic.

I'll see if I can grab a photo.

Pete