why use the sidepot for airintake?

[donkeasy]

why use the sidepot for airintake?
What's wrong with the hole in the bonnet?
Looks to me as an air-intakepoint.

[stig]

Eh? Not sure if I understand the question chap?

Sidepod aid intakes are for the engine bay and usually feed the aircon rad and oil cooler, bonnet intake is for coolant radiator?

[donkeasy]

Yes your right. I Try again:
Why not take fresh air from the opening in the fiberglass above the engine.

Joop

[bigmack]

On the GTR, yes, I think its best to take air into the engine from the top scoop on the car and save the side pods intake for the oil cooler and aircon condensor. Most people with a single throttle body on their motor, like an LS(X), or going with a modified plumbing setup to the side pods. Personally, I built an airbox that went up on my sports and blocked it off to the top scoop.
Cheers!
-Mack

[CanAm Dave]

Hi Joop

I think the roof scoop may work ok on the GTR for an air intake but not on the Can-Am.

Regards Dave

[tuxman]

what ever way you look at it the hottest part of the rear clip area is at the top i have seen temps of 60 degrees in traffic my old carb used to hate this .did some test and the coolest place is in the sidepods ,been out tonite for a spin outside air temp was 22 degrees temp at top of clip 55 degrees air intake temp 24 degrees !!!!!drawing air from side pod has been the coolest way to get more power if i had been using the air from the top of the clip (55 degrees)i would see a 15% reduction in fuel !!!!acording to ecu map ,must equal a fair lump of power .simon

[donkeasy]

Thanks Guys,

If somebody else has input,
I would like to hear it too please.

Joop

[splatspeed]

the colder the air

the denser

the denser the more oxygen and less chance of detination

a lot of NA cars are using cold aitr intakes for that little bit more power

turbos have been using intercoolers for years

its a trade of between cooling the air and restricting it

[GTWayne]

I will be boxing in the air intake from the foof scoop down to the inlet trumpets and trying to seal it as well as I can.I think insulation is a good way to go to try and keep the inside of the box cooler than the engine compartment.I am also looking at having the roof scoop/air intake modified to protrude above the roof line or maybe to extend across the roof like the Stealth B6 because in the standard possition, it is in an area of low pressure and although of negligible benifit at low speed,once moving will then have a 'ram air' effect.

[steve_d]

GTWayne said:

I will be boxing in the air intake from the foof scoop down to the inlet trumpets and trying to seal it as well as I can.I think insulation is a good way to go to try and keep the inside of the box cooler than the engine compartment.I am also looking at having the roof scoop/air intake modified to protrude above the roof line or maybe to extend across the roof like the Stealth B6 because in the standard possition, it is in an area of low pressure and although of negligible benifit at low speed,once moving will then have a 'ram air' effect.

One of the race preped cars I saw a while ago had the scoop extended right to the top edge of the screen. It may have been one or both of the cars across the North sea somewhere. I agree that would be one way to make the scoop effective. The other would be to put a pair of fans in the scoop. This would add the benefit of flow at lower speeds.

Steve

[pb3]

Wayne, what you describe is what I have just done to my GTR.

Here's a pic


This works a treat but I still get some heatsoak when standing still, I need to seal it a little more as hot air can still make its way in.

[donkeasy]

I was also thinking in that direction, GTWAYN, intake-extending over the roof.
But that doesnot solve that the fiber will be heated up, which is a big problem.
Maybe I should use all the cold air I can get to cool the enginecompartment/fiber

[GTWayne]

Looks good.I am thinking of maybe having a snorkle type of inlet permantly fixed to the induction setup and protuding through the rear clip remaining static when clip is opened. donkeasy; Double skining will help to reduce heat soak and have you thought of installing an extractor fan in the rear grill to help heat exit the engine compartment whilst at slow speed or stationary? My exhaust runs along the top of the G50 and gives me enough room to mount 2 X Spal fans that shift 1160cfm, don't know how well they work yet or indeed if they work but will keep you posted.

Edited by GTWayne on Tuesday 6th June 11:59

[canam-phil]

I ran the Canam with a Holley on the 500bhp engine for a year before switching to EFI. With the Holley I didnt have the problems with the high intake air temperature but did have the hot air blasting out of the scoop when stationary.

So, I adapted it for the EFI air filter shown in the images.

The IAT seems to stabilise about 5 to 10 c above ambient air temp. Now I dont get the hot air blast for the passenger and driver!

I think another heat problem though is the fuel temperature. In a carb there is a lot of heat passed to the fuel in the bowls with the possibility of vapour locks etc. I was concerned and when I went EFI I would attempt to minimise any heat buildup in the fuel and rather than fit the swirl pot anywhere on the bulkhead, I fitted it low down on the chassis under the header along with the high pressure pump and filters. A heat shield goes between the exhaust header and swirl pot. The pot remains cool but it is surprising the amount of heat picked up by the unused fuel as it circulates through the fuel rails and back to the swirl pot with the rest going through the tanks. I shielded the fuel rail feeds and pipes.

http://img273.imageshack.us/img273/58
http://img273.imageshack.us/img273/27
http://img273.imageshack.us/img273/81
http://img273.imageshack.us/img273/97
http://img273.imageshack.us/img273/22
http://img273.imageshack.us/img273/64
http://img273.imageshack.us/img273/33

Edited by canam-phil on Tuesday 6th June 18:56

[crafty]

The rear of the car is a negative pressure area..... Air will get sucked through the holes (on roof and in side) by the negative pressure at the rear.

[canam-phil]

crafty said:

The rear of the car is a negative pressure area..... Air will get sucked through the holes (on roof and in side) by the negative pressure at the rear.

Strange though that hot air comes through the top rear clip gap when moving very swiftly in the Canam! Just place a hand over the clip gap behind the seat backs and you can feel considerable flow and heat. I would love to see the wind tunnel flows for the full screen canam because that generates a low pressure just behind the seats and I think that this gives rise to the hot air sucking out of the gap and scoop if you dont block it off. Do I remember a factory recommendation to seal off the scoop on the Canam?

[tuxman]

just thinking about blocking mine off at the moment the only problem is where will all that hot air go ?

[andygtt]

crafty said:

The rear of the car is a negative pressure area..... Air will get sucked through the holes (on roof and in side) by the negative pressure at the rear.

Apparently this is not what will happen.

[V-Corse]

I think the roof scoop from around the north sea must be mine! After hitting this site for a few times when searching the internet for Ultima i finally registered. Im the mecanic that runs the Ultima from the Belcar.
As soon as i find out how to attach a picture i'll share a picture of the roof scoop.

[HCT]

You can host your images at www.imageshack.us

Works well most of the time.