nitrozilla

iTrader: (1)

i was looking at pics on neobuggy from this years montipellier and i came across this picture of mayfields buggy. what is he using on his pressure line?? is it a one-way vavle?? If so why

lknracer

iTrader: (25)

My old eyes can't see it on that image, but there are generally two items that some people use on their pressure lines:

1. Exhaust cooler -- an aluminum or steel heatsink (that looks like a fuel filter) which in theory cools the hot exhaust before it gets to the fuel tank. Hot exhaust = hot fuel = worse fuel economy. Some people also used to use a fuel filter without the filter element for this purpose

2. Pressure valve -- Orion introduced one of these a few years ago -- not sure if there are more on the market now. It basically helps maintain the pressure in the tank, even when the car is upside down.

Roelof

That gold color piece near the tank cap?
It looks like a fuel line coupling adapter, maybe it has a smaller hole to lower down the pressure. I have played with lowering the pressure and must say that you can make some improvements with that.

Huleboer

Here are some links to bigger pictures.

http://gallery.neobuggy.net/2012Race.../O/DNC0177.jpg

http://gallery.neobuggy.net/2012Race.../O/DNC0182.jpg

Roelof

Zooming in on the 1st pic I would say I am right. With setting my IE zoom on 400% I do see a smaller hole in the coupling piece.

nitrozilla

iTrader: (1)

ok so i have heard of using valves to increase pressure and have heard nothing but bad things but i have to admit i have never heard of lowering your pressure . what are the benefits?

ehartman_49348

iTrader: (27)

Very interesting....

Completely unrelated: when did Mayfield start running the LRP engine instead of the Reedy engine?

bkuff-losi

iTrader: (17)

I'm pretty sure last year at the ams was the first time

losi_racer

iTrader: (25)

Nats at thunder alley Was the first race

Roelof

The engine will be less pressure sensitive. Going back from top rpm to idle in a normal situation will still give a pressure boost resulting in a rich bottom end when giving throttle again. Trying to lean out can give other problems.
Lowering pressure will fiter out those boosts giving a less rich bottom end without going to lean.

ehartman_49348

iTrader: (27)

What's the exact part and where can you buy it? I would like to experiment with this a little bit to see how it really behaves....

Roelof

Ik do not know what parts, such things can smple be made by yourself.

Therte is one thing you can look at, there are some exhaust gas coolers wit a HSN from a carburater attached. With that you can adjust the pressure.