Nitro body venting???
#1
Nitro body venting???
I've been seeing a lot of nitro bodies these days cut differently than what is typical. Usually a body has a hole in the windshield that is inline with the engine head. Now I'm seeing some pro racer bodies that have the front hole cut at the top edge of the front windshield. They're cut so high that they are pretty much on the roof of the body.
What is the benefit of cuttng the hole so high on the body?
I've attached an example of the high hole. I've also seen the same thing in ads of Mugen's MTX3.
What is the benefit of cuttng the hole so high on the body?
I've attached an example of the high hole. I've also seen the same thing in ads of Mugen's MTX3.
#3
Tech Fanatic
It also higher because the tank is more towards teh center of the car instead of the front half. That's all. I use to cut that hole on the windshield for my ntc3 but for my mtx-3, it's like half way on the roof in order to open the tank. So...nothing special I think.
G
G
#5
Tech Addict
but the round hole in the windshield is often enough to get the job done..
#7
U do no that its not legal to cut the body on tha roof like that and your only aloud to cut 1/2 of the windsceen.
But who gose by the rules any way.
But who gose by the rules any way.
#8
Originally posted by Thunder racer
U do no that its not legal to cut the body on tha roof like that and your only aloud to cut 1/2 of the windsceen.
But who gose by the rules any way.
U do no that its not legal to cut the body on tha roof like that and your only aloud to cut 1/2 of the windsceen.
But who gose by the rules any way.
I don't have my new rulebook here, so if anyone knows exactly what the rules state, fire away.
#9
Tech Elite
iTrader: (2)
rules change depending what part of the world your
from. that body that was posted for example was from
the japanese nationals. for us. as long as the vent from
windshield to roof line is within spec diam. i forgot the
exact measurement it will pass. the just want to limit
the diam. on the windshield.
from. that body that was posted for example was from
the japanese nationals. for us. as long as the vent from
windshield to roof line is within spec diam. i forgot the
exact measurement it will pass. the just want to limit
the diam. on the windshield.
#10
The latest rules for the upcoming IFMAR Worlds, just an FYI:
"1.15 Only the following AIR HOLES and sizes are permitted in the bodyshells:
One (1) cooling hole may be cut in the front windscreen only (not intruding on either the roof or bonnet) with a maximum dimension in any direction of 60.00mm.
15.00mm maximum diameter hole in the roof for glow plug access.
Both front side windows and the rear window can be removed for ventilation, except for the side rear windows, which must remain intact.
Re-fuelling hole maximum 50.00mm diameter.
Small holes can be made for the exhaust pipe, transponder and radio antenna.
No other holes are permitted."
"1.15 Only the following AIR HOLES and sizes are permitted in the bodyshells:
One (1) cooling hole may be cut in the front windscreen only (not intruding on either the roof or bonnet) with a maximum dimension in any direction of 60.00mm.
15.00mm maximum diameter hole in the roof for glow plug access.
Both front side windows and the rear window can be removed for ventilation, except for the side rear windows, which must remain intact.
Re-fuelling hole maximum 50.00mm diameter.
Small holes can be made for the exhaust pipe, transponder and radio antenna.
No other holes are permitted."
#11
Tell me if I might be wrong on this ... I have seen many cars raced by the pros that have the hole on the windscreen. Might the ones at the top near the roof line be because it is a combination for ease of re-fueling and also that the ambient temperature is too cool? Might it be that they want to keep the engines at the right working temperature?
#13
Tech Fanatic
On the mtx-3 i cut mine a little on the left side of the body just below the roof line
#14
mtx3racer - I notice that with a Dodge Stratus bodyshell you need to have the hole higher up to the roof line to access to the fuel tank. With the Alfa 156 2.1 there is no real need.