fumes through open tailgate

[TeaMonsta]

You lost me when you mentioned football.

Don't tempt me into another physics lesson!

[welshred]

Run it on wvo, then you can sniff the fumes as much as you like and still not die!

no just like a chip shop lol

[Rob5464]

Mine is even worse because i cut the tailpipe and welded it straight to the back with a rectangle tip on it. Smells like an old bus.

When I start running on on veg oil it will smell nice.

There is no silencers in mine and its obnoxiously loud. Currently welding in a small resonator.

With a gasless mig trying to do stainless steel is hard in itself, with a 5mm difference between the pipes its making for a messy weld

[wishbone]

With a gasless mig trying to do stainless steel is hard in itself, with a 5mm difference between the pipes its making for a messy weld

Grind some 1" long slits along the larger pipe and then bend the tabs in a bit to make the smaller pipe fit snug, then weld up.

[Rob5464]

Grind some 1" long slits along the larger pipe and then bend the tabs in a bit to make the smaller pipe fit snug, then weld up.

Cheers for the advice, but I can't its the resonator thats a bigger diameter and it doesn't have any pipe attached.

[wishbone]

You can do it the other way too - grind 4 slits in the smaller pipe and bend outwards to make it fit the larger hole, then weld up the slits, or patch over them if they're too big to bridge with weld.

[shokenore]

Agreed. High pressure flows to low pressure. Which is why the air will rush out of a football when you stick a knife in it. As your car moves through the air, the air is being pushed out the way causing an area of low pressure behind the car. That void needs to be filled again so air gets "sucked" round the back of the car. Air behaves like a liquid. Think of the effect a rock has in a flowing stream. Your car is the rock, the air is like the water. And it's much more pronounced with cars that have a flat rear end. Like a Surf. Anyway, physics lesson over; I'm boring myself (and others, probably....)

What happens to this low pressure area when you have a strong tail wind equal to or greater than the speed of forward motion?

I like physics.

[BUSHWHACKER]

What happens to this low pressure area when you have a strong tail wind equal to or greater than the speed of forward motion?

I like physics.

65mpg.

[shokenore]

So if you had a model plane in your boot would this low pressure area over the wings cause it to take off?

[MWS]

So if you had a model plane in your boot would this low pressure area over the wings cause it to take off?

Only if it was traveling along a coveyor belt at the same speed..

[Rob5464]

You can do it the other way too - grind 4 slits in the smaller pipe and bend outwards to make it fit the larger hole, then weld up the slits, or patch over them if they're too big to bridge with weld.

I will see how I get on tomorrow and do that if needed. I welded one side onto the pipe today but I will need to put the exhaust back on and tack the other side to make sure the flange on the other end lines up.

[Koi]

So if you had a model plane in your boot would this low pressure area over the wings cause it to take off?

depends which way its facing. If its facing the front of the vehicle then you need to have the front windows open to cause the air flow to go over the wings in the right direction., then it might.
With just the rear open it just causes a vortex at the rear of the vehicle with no significant air flow as such.

[Wolfracer]

What happens to this low pressure area when you have a strong tail wind equal to or greater than the speed of forward motion?

I like physics.

So do I, but why would you have your back window open in a hurricane?

[TeaMonsta]

65mpg.

Correct.

[Wolfracer]

Correct.

Sh!t, I must always be driving in the wrong direction then...