回壓喉加個perssure chamber有咩用

19# redbullbull

唔好勞氧,我諗大家都係想幫吓手啫,慢幔傾....
sdan321 發表於 2009-4-21 02:10

                               
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哈哈sdan兄,幾時帶埋我這個新手去場玩呀?
上一次和你交收很愉快哦

22# redbullbull
嘩....你都叫新手,随時你資力仲深過我吖,''紅牛''大哥
有時間又想入場玩時,找我啦,PM或電聯都得,等你......

Exhaust Gas Cooler to increase runtime on 1 fueltank.

Hi All,
I have a few questions :-
1. is 回壓溫度降 = this item -> http://www.topcad.com.hk/v4/Description/gg/GG2208.php
2. is 回壓溫度降 = perssure chamber

Thanks

裝後 .12引擎可降幾多度?如可降死氣温度,將它在引擎前油喉當油泠會否更好?

I really cannot see how exhaust cooler can reduce temperature of the engine and make the engine run faster.  Even NovaRossi has not make such a claim.

Exhaust cooler is not the same as pressure chamber.

Exhaust cooler: see this http://www.novarossi.com/content_uk/products/gadgets/index.php

Pressure chamber : see link in my previous post.

以我所知有以下function, 有錯請插.
1, 加o左後令回壓的氣體temp降低, 令engine temp低o左, engine temp低左大家都知有咩好處la.
2, 有filter function, 令回壓o的氣清潔D
3, 回壓壓力低D, fuel減少氣泡, 令engine easy to fune.
但都要因情況而定......

I really cannot see how exhaust cooler can reduce temperature of the engine and make the engine run faster.  Even NovaRossi has not make such a claim.

Exhaust cooler is not the same as pressure cha ...
Phelipcopter 發表於 2009-4-21 20:58

                               
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贊同上述分析。
市面上有三種外型相似的東西，可能因此引起混亂。
1.用作過濾
2.降温(有散熱片外型)
3.Pressure chamber
我認為第三種是用作穩壓，引擎運作特別是高速後變回怠速，回壓的壓力大幅回落，這容器就是短時間負有穩壓作用，就像風泵的氣缸儲存壓縮空氣一樣，又或像半波整流綫路內的電解电容，令DC更平.滑。

見大家傾得咁開心，加入討論，小弟冇玩油車5年，有少少out 當時有用回壓喉，並且利用其長短去控制回壓大小；令到full雞唔會窒油。但唔記得有冇Fuel Cooler呢樣東東 睇咗上文，估計佢地係兩樣嘢嚟 Pressure Chamber 功能等同回壓喉，不過佢比較容易set回壓大小，唔似以前啲回壓喉(其實係油喉)要剪短或加長去set回壓大小 由於有高温廢氣進入油壺內加壓，令到內裹汽油升温，而高温汽油對引擎表現利(小弟冇這方面的知識，只是抄前文師兄意思)，所以要加 Fuel Cooler，令油温降低 請留意，Pressure Chamber是裝在加速管與油壺之間；而Fuel Cooler是裝在油壺與引擎之間 而且睇嚟兩樣可以一齊装:) 以上純屬猜測，有錯請更正:)

                               
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其實依家有一樣野叫PRESSURE COOLER CHAMBER , 係3racing出品

功能:
As Pressure Chamber - speed up the action
It also can equalize a pressure coming between tuned pipe and fuel tank. When you open the fuel tank, air pressure will be disappeared. The pressure chamber adjustable needle to regulate the insert amount of gas flow the system and provide a temporary space for storage a air pressure. You can get ready at once after closing the fuel tank.

As Cooler - saving oil
Mount it between the tuned pipe and fuel tank. It can cool down the heat air when the air pass through the cooler so that heat gas will not go into the fuel tank directly. As a result, it can slow down the evaporation of the oil because the fuel tank temperature is decreased.

As Filter - protect your engine
There is a filter plate in the pressure chamber cooler to provide a oil filter function, it prevent impurity fuel enter the engine. You can mount it between the engine and the fuel tank. Mostly used in 1/8 buggy.

24# eddie1981

如果閒日或者多朋友一齊去玩,多數去pyc,因交通,飲食,入場費等比較方便,....而trc通常都是星期四先去,因有朋友載我來回...eddie師兄,多謝你的邀請,因本星期日會到pyc一遊,所以下星期一先暫停放車,而下星期四（即三十號）暫定會去trc玩玩,睇吓有機會一齊交流同指教吓小弟,大家可pm聯絡,好嗎?等你

係隔垃圾

靚仔多過有用........

係隔垃圾
lunb 發表於 2009-4-24 19:31

                               
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靚仔多過有用........
DC5 發表於 2009-4-24 19:50

                               
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Really OMG...

Sorry I don't check posts all the time,
happened to miss this interesting post.  =)

If you have played any larger scale engines .21+,
then you will know what it's used for.

#1 It stabilizes the pressure inside the fuel tank (i.e. regulates fuel pressure).
Have you ever noticed the difference in throttle response (fuel richness) between a full-tank car and a half-tank car?
The pressure chamber helps regulate the air pressure when the tank is full.

#2 For large-scale cars, because the exhaust pipe and fuel tank are not in the same positions,
it is easy for the air pressure(inside fuel tank) to rise/drop during left/right corners.
Routing the back-pressure line helps,
and positioning this pressure chamber at a strategic position helps minimize that pressure difference in left/right turns so the engine runs much much more stable with a stablized fuel pressure (resulting in stabilized air/fuel ratio)

For this reson, you'll see a lot of top buggy drivers route the back-pressure line in strategic ways,
and many of them have a pressure chamber installed along the pressure line.

There is no filter inside the pressure chamber,
so it's not for 隔垃圾 LOL, I laughed so hard when I saw 隔垃圾.
Some people can really be ignorant

I guess for .12 to .15 engines, the pressure difference isn't that big,
so the actual use of the pressure chamber is minimal.
When you've driven .21+, such as a .28 used in Savage for example,
then you'll feel the difference in fuel pressure under left/right turns;
You would want to eliminate that damn difference,
and the pressure chamber is a solution that helps  =)

Cheers,
BigHead

Really OMG...

Sorry I don't check posts all the time,
happened to miss this interesting post.  =)

If you have played any larger scale engines .21+,
then you will know what it's used fo ...
BHP 發表於 2009-4-25 00:27

                               
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Oh I left out #3, a very crucial #3.

#3 Each time the engine idles (entering corner),
the air pressure within the fuel tank decreases due to throttle lift-off.

When gas is applied again, it takes time for the air pressure to build up --> fuel pressure --> air/fuel ratio issues.
This is why many 1/8 and 1/10 drivers keep up "blipping" the throttle before they exit the corner,
the idea is to maintain the air pressure within the fuel tank.

The pressure chamber helps to maintain the air pressure a little bit if strategically placed.
Where the strategic placement is depends on the layout of your pipe / fueltank,
as well as track layout.

For starters,
it's usually placed in front of the fuel tank,
on the other side of the pipe for a more-balanced overall air pressure.
#3 is often overlooked,
because the top drivers already practice this throttle blipping skill all the time.
Yet, with the pressure chamber, it can make the car handle much smoother in mid-corner,
as sound more realistic, instead of sounding like an idiot blipping 4 times every corner (personally against throttle blipping technique) =)

BigHead

#3 is my understanding too. But #1 and 2 are the new knowledge to me

#3 is my understanding too. But #1 and 2 are the new knowledge to me

Fluke 發表於 2009-4-25 21:05

                               
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Most people would be concerned about #3,
since #1 can be solved by not filling the tank full  =P
and #2 only concerns 1/8 or larger scale cars  =)

I don't know,
maybe there are more reasons to use the Pressure Chamber,
although I don't think "cooling" or "filtering garbage" are the true intentions of this product  

Most people would be concerned about #3,
since #1 can be solved by not filling the tank full  =P
and #2 only concerns 1/8 or larger scale cars  =)

I don't know,
maybe there are more rea ...
BHP 發表於 2009-4-25 21:35

                               
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Thanks for your sharing

I need to dig out my physics text book - since when the location of an 'air' chamber will affect pressure.  I think it is the length/diameter of the fuel line that affects pressure, the longer the line, the more pressure drop and smaller diameter, higher pressure?