Alspos
Member
- Joined
- Mar 19, 2004
- Messages
- 44
- Reaction score
- 11
- Points
- 8
- Location
- Melbourne
- Members Ride
- VK V8 Sedan
My 308 VK has a cowl hood and a whopping hole in the bonnet courtesy of the previous owner. I figured I'd experiment and see if I could make a cold air induction system and utilise what I have.
1. Started with a bucket that's close to what I want.
2. Fibreglass (messily)
3. Modify the fibreglass to fit and miss plug leads and the bonnet
4. Tape to air cleaner base and cut to suit the hole. I extended the lip about 20mm above the bonnet
5. Rivet to the air cleaner and test if it works
6. Make pretty.
My thoughts - I figured air would be more likely to enter now via the top than via the engine bay and get heated on the way. The air cleaner is not directly open to the engine bay.
Observations - At 60, 70, 80 km/hr, I'm pretty sure it makes bugger all difference the way it's configured. The air temperature measured while driving was pretty much the same with or without the shroud. At idle, the temps were also similar.
Conclusion - I think the hoop scoop is letting in cold air regardless, but that may change when speeds get higher. I think to make a proper cold air induction you need to seal to the underside of the bonnet to completely isolate the air cleaner from the engine bay. I guess that's my next step.
1. Started with a bucket that's close to what I want.
2. Fibreglass (messily)
3. Modify the fibreglass to fit and miss plug leads and the bonnet
4. Tape to air cleaner base and cut to suit the hole. I extended the lip about 20mm above the bonnet
5. Rivet to the air cleaner and test if it works
6. Make pretty.
My thoughts - I figured air would be more likely to enter now via the top than via the engine bay and get heated on the way. The air cleaner is not directly open to the engine bay.
Observations - At 60, 70, 80 km/hr, I'm pretty sure it makes bugger all difference the way it's configured. The air temperature measured while driving was pretty much the same with or without the shroud. At idle, the temps were also similar.
Conclusion - I think the hoop scoop is letting in cold air regardless, but that may change when speeds get higher. I think to make a proper cold air induction you need to seal to the underside of the bonnet to completely isolate the air cleaner from the engine bay. I guess that's my next step.