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Gotcha. There's been documented increases on replacing stock paper element with higher flow gauze element, removing intake resonator, and using silicone elbow. I just think after that, increases can be negligible in moving to a cone setup unless doing it mainly for sound characteristics.
100% agree. Aside from those observations, sound and eye-candy definitely have a certain appeal
100% agree. Aside from those observations, sound and eye-candy definitely have a certain appeal
There is a "claw" intake setup for the Corvette I've been eying for years - I know it won't do ANYTHING as far as performance, but it looks fuggin' awesome and eliminates the ugly black ABS plastic airbox...
There is very little clearance in the Corvette nose where the factory air box sits...a full-size cone filter will not fit. Options include using a larger filter relocated in a hot area of the engine bay (stupid), installing an intake into the space where the license plate would go (ugly AND stupid), or one of the multi-filter rigs...
The diameter of those blue filters is about the largest thing you can fit in the area where cold air actually feeds into the Corvette engine bay...so in addition to making the owner imagine that his romantic prowess has been tripled, it also makes engineering sense.
EVO is installed now and sounds great/aesthetically pleasing.
I have a K&N in the garage that was on the car previously (terrible design) and a 997 3.8 air box on order.
Might try a Dyno comparison soon.
If you're wondering about the gold heat tape, it dropped the external temp of the intake pipe 70-80 degrees on track from 200 coming in hot post session to 120-130.
Last edited by vandersmith; 08-29-2016 at 05:38 AM.
I have a K&N in the garage that was on the car previously (terrible design) and a 997 3.8 air box on order.
If you're wondering about the gold heat tape, it dropped the external temp of the intake pipe 70-80 degrees on track from 200 coming in hot post session to 120-130.
Tried the 3.8 airbox and also observed it side by side. Didn't do too much over the stock gutted(resonator removed) 996 box powerwise except look better. It may make a difference on a built motor but didn't see any gains on a stock internal motor.
On the Evo intake setup, you'll see more gains by cutting a vent above the filter on the factory decklid than any gains wrapping the intake will do. As you observed, the temps are lower but it really doesn't do anything for HP in the real world on that setup even though it sounds good on paper.
Did you also consider heat shielding the box in which the filter sits? It seemed to me that sucking in nice, cool air using the factory ABS intake tube and dumping it into a black steel box that is heated to whatever the ambient temperature of the engine bay was a great way to preheat that pesky cool air...but due to the fitment issues with my aero engine cover, I didn't bother trying to resolve any heat issues (real or imagined)...
Tried the 3.8 airbox and also observed it side by side. Didn't do too much over the stock gutted(resonator removed) 996 box powerwise except look better. It may make a difference on a built motor but didn't see any gains on a stock internal motor.
At this point I'm more curious than anything. At the end of the day, I really don't think you're gaining or losing anything with these other than sound. The KN is the worst, there's no way that MAF location (16" from the TB) is getting an accurate enough reading for the DME.
Originally Posted by alpine003
On the Evo intake setup, you'll see more gains by cutting a vent above the filter on the factory decklid than any gains wrapping the intake will do. As you observed, the temps are lower but it really doesn't do anything for HP in the real world on that setup even though it sounds good on paper.
Have been considering a second hole above the filter for a while. Will need to think about it some more from a hydro perspective
I wasn't expecting any gains from the wrap. When I would come into the paddock the EVO pipe which is metal (alum?) would be scorching hot. You couldn't even touch it. I used my tire pyre and it was over 200 degrees on an 80 degree day. Wrapped it in some gold heat shield and now its consistently around 120 - not sure if that translates to the inside but I'd imagine it does.
Originally Posted by 5CHN3LL
Did you also consider heat shielding the box in which the filter sits? It seemed to me that sucking in nice, cool air using the factory ABS intake tube and dumping it into a black steel box that is heated to whatever the ambient temperature of the engine bay was a great way to preheat that pesky cool air...but due to the fitment issues with my aero engine cover, I didn't bother trying to resolve any heat issues (real or imagined)...
The box is actually hard ABS plastic and doesn't really transfer heat at all. The intake pipe from the TB to the Air Filter being metal does which is why I wrapped it.
The box is actually hard ABS plastic and doesn't really transfer heat at all. The intake pipe from the TB to the Air Filter being metal does which is why I wrapped it.
Right, right - it is the k&n with the metal box, and the abs one that didn't seal with my mkii aero lid. It's a blur.
08-25-2016, 06:50 PM
