powerwrx

iTrader: (11)

Are induction kits any good? Which is best? and do they break
m.a.f's.
LETS GET TO THE BOTTOM OF IT

[Davey]

IMHO they are a waste of time unless you are mounting the cone outside the engine bay. Even with pointless metal heat sheilds they are still sucking in the hot air that is circulating in the engine bay.

Get a high flow pannel filter.

JTaylor

I have a FMIC so no option. I splashed out on a Pipercross Viper kit because it's dry and doesn't vibrate (MAF friendly) and is enclosed, thus avoiding the heat suck issue. In terms of gains, unless you're going for BIG, BIG bhp and need to flow more air than the OE airbox can muster, as Davey says, I wouldn't bother. HTH.

J

sl1000

Don't agree about the possible gains.
See previous post:
http://bbs.scoobynet.co.uk/showthread.php?t=502146

There is a significant loss in pressure due too restrictions by the airbox and also MAF.

Although I do agree that an induction kit which does suck hot air is not the sollution.

if at 300 horses you have a inlet pressure of 0.8 and you use 2.5 bar absolute boost pressure for this, the pressure ratio increases from 2.5 to
2.5/0.8 = 3.125.

This will result in higher turbo air outlet temperatures.
And depending on the intercooler used an certain amount of engine air inlet temperature increase.
next to this you will reach the limits of the turbocharger earlier. because it has to work harder.

Seems to me if you go to the trouble and money of fitting better turbochargers and fmics, you should save some for a better induction.

For me ultimately this will mean leaving MAF and use a MAP based ECU and a decent inlet pipe diameter (let's say 3") with the filter placed so it can only suck in cold ambient air.