Does a stinger / chamber increase performance?

rankoz350 · 21st February 2006, 06:47

Certain questions I would like to get answered.
1. Does a stinger/ chamber increase perfromance of a bike?
2. Which is the most optimal design of a stinger/ chamber?
3. Can anybody explain how a stinger/ chamber work, and relevant performance feedbacks....

buzzin_hornets · 21st February 2006, 06:52

Quote:

Originally Posted by rankoz350

Certain questions I would like to get answered.
1. Does a stinger/ chamber increase perfromance of a bike?
2. Which is the most optimal design of a stinger/ chamber?
3. Can anybody explain how a stinger/ chamber work, and relevant performance feedbacks....

are u referring to a combustion chamber?

satyamenon · 21st February 2006, 20:49

Quote:

Originally Posted by buzzin_hornets

are u referring to a combustion chamber?

I think he's talking about an expansion chamber.

On 2 strokes, a chamber is supposed to pull out the spent charge as quickly as possible and without pulling out any fresh charge with it. In fact, a good chamber will have a pulse going back towards the cylinder to prevent fresh charge from coming out along with the spent charge.

karthik247 · 21st February 2006, 20:52

A chamber, if made correctly accodring to the bike will increase the performance of 2stroke bikes.

Off Topic - Are chambers used on 4strokes too? Or are they mufflers??

satyamenon · 21st February 2006, 20:56

Mufflers are only used to deaden sound... don't think its used for much else.

For 4 strokes, I don't think they're called expansion chambers. But the exhaust system in a 4 stroke is designed for a slightly different purpose.

On 2 strokes, the pulse is used to push charge back in. On 4 strokes, the exhaust system should be designed in such a way that no pulse goes back to the cylinder. Also, if not designed properly, on a 4 stroke, you could fry your exhaust valve...

Tech whizzes, please correct me if i'm wrong.

rankoz350 · 22nd February 2006, 07:16

Wow! That was an eye opener!! I have put a chamber made manually by my mechanic, for my 4-stroke honda dio, and the performance decreased like anything - specifically :
1) mileage reduced significantly.
2) Pickup reduced.
If further explainations as to why the above two inefficiencies took place, I'd be greatly obliged ( if required, i can post the pic of the internal part of the chamber ....)

..... Thankz a lot guys!!

satyamenon · 22nd February 2006, 15:28

what exactly did he consider when designing the "chamber" ?

rankoz350 · 23rd February 2006, 07:48

the chamber he has given looks plain simple, with no emphasis on the actual logic behind it ( as given in earlier posts)..... i'm not good at the technical side so bear with me....
It comprises (from outside to inside) of a cylinder (the exterior shell of the chamber), glasswool, mesh, and finally a thin pipe like thing.... i think u call that the muffler....

I would appreciate some logic on the said above configuration....thankz

satyamenon · 23rd February 2006, 15:11

This sounds more like a simple free flow design sort of exhaust... I have my doubts if he considered factors like back pressure when designing it...

rankoz350 · 23rd February 2006, 18:58

no i dont think he did

......how do i make it right?!....rather what do u suggest in makin a performin stinger...

satyamenon · 23rd February 2006, 19:57

sorry bud... got very little knowledge when it comes to automatic scooters... Why do you want to mod a dio?

rankoz350 · 26th February 2006, 16:41

someone pls tip me...........

turbo_v12 · 27th February 2006, 13:38

Think Satya's right here...
Your mechanic has only done something to the exhaust system...As expansion chambers (stingers as u call them) can only be applicable to 2-strokes. As for a free-flowing exhaust, I think that if not done properly it adversely affects the exhaust valves...am i right? And it does affect the average also...just makes the bike sound better.

rankoz350 · 28th February 2006, 21:54

yeah.... there was a drop in performance.... like the pick up reduced quite a bit, but it did great between 50-70 km/hr...... the exhaust valve is ported......

cinclaturbo · 1st March 2006, 06:08

Quote:

Originally Posted by rankoz350

yeah.... there was a drop in performance.... like the pick up reduced quite a bit, but it did great between 50-70 km/hr...... the exhaust valve is ported......

Now don't tell me the dio has got reeds also.

U don't put chambers/stingers to four stroke engines. Ur mech must be 2-T specialist.....

Use a free flow exhaust sys.And get the tuned length right. And add performace air filter something like UNI or K&N.

21st February 2006, 06:47	#1
rankoz350 BHPian Join Date: Jan 2006 Location: Ghusais - Bangalore - Dehradun Posts: 94 Thanked: 0 Times View My Garage	Does a stinger / chamber increase performance? Certain questions I would like to get answered. 1. Does a stinger/ chamber increase perfromance of a bike? 2. Which is the most optimal design of a stinger/ chamber? 3. Can anybody explain how a stinger/ chamber work, and relevant performance feedbacks....
	() Thanks

21st February 2006, 20:52	#4
karthik247 Senior - BHPian Join Date: Feb 2005 Location: BLR, HYD Posts: 2,710 Thanked: 30 Times	A chamber, if made correctly accodring to the bike will increase the performance of 2stroke bikes. Off Topic - Are chambers used on 4strokes too? Or are they mufflers??
	() Thanks

21st February 2006, 20:56	#5
satyamenon BHPian Join Date: Dec 2005 Location: Jacksonville, FL Posts: 110 Thanked: 5 Times	Mufflers are only used to deaden sound... don't think its used for much else. For 4 strokes, I don't think they're called expansion chambers. But the exhaust system in a 4 stroke is designed for a slightly different purpose. On 2 strokes, the pulse is used to push charge back in. On 4 strokes, the exhaust system should be designed in such a way that no pulse goes back to the cylinder. Also, if not designed properly, on a 4 stroke, you could fry your exhaust valve... Tech whizzes, please correct me if i'm wrong.
	() Thanks

22nd February 2006, 07:16	#6
rankoz350 BHPian Join Date: Jan 2006 Location: Ghusais - Bangalore - Dehradun Posts: 94 Thanked: 0 Times View My Garage	Wow! That was an eye opener!! I have put a chamber made manually by my mechanic, for my 4-stroke honda dio, and the performance decreased like anything - specifically : 1) mileage reduced significantly. 2) Pickup reduced. If further explainations as to why the above two inefficiencies took place, I'd be greatly obliged ( if required, i can post the pic of the internal part of the chamber ....) ..... Thankz a lot guys!!
	() Thanks

22nd February 2006, 15:28	#7
satyamenon BHPian Join Date: Dec 2005 Location: Jacksonville, FL Posts: 110 Thanked: 5 Times	what exactly did he consider when designing the "chamber" ?
	() Thanks

23rd February 2006, 07:48	#8
rankoz350 BHPian Join Date: Jan 2006 Location: Ghusais - Bangalore - Dehradun Posts: 94 Thanked: 0 Times View My Garage	the chamber he has given looks plain simple, with no emphasis on the actual logic behind it ( as given in earlier posts)..... i'm not good at the technical side so bear with me.... It comprises (from outside to inside) of a cylinder (the exterior shell of the chamber), glasswool, mesh, and finally a thin pipe like thing.... i think u call that the muffler.... I would appreciate some logic on the said above configuration....thankz
	() Thanks

23rd February 2006, 15:11	#9
satyamenon BHPian Join Date: Dec 2005 Location: Jacksonville, FL Posts: 110 Thanked: 5 Times	This sounds more like a simple free flow design sort of exhaust... I have my doubts if he considered factors like back pressure when designing it...
	() Thanks

23rd February 2006, 18:58	#10
rankoz350 BHPian Join Date: Jan 2006 Location: Ghusais - Bangalore - Dehradun Posts: 94 Thanked: 0 Times View My Garage	no i dont think he did ......how do i make it right?!....rather what do u suggest in makin a performin stinger...
	() Thanks

23rd February 2006, 19:57	#11
satyamenon BHPian Join Date: Dec 2005 Location: Jacksonville, FL Posts: 110 Thanked: 5 Times	sorry bud... got very little knowledge when it comes to automatic scooters... Why do you want to mod a dio?
	() Thanks

26th February 2006, 16:41	#12
rankoz350 BHPian Join Date: Jan 2006 Location: Ghusais - Bangalore - Dehradun Posts: 94 Thanked: 0 Times View My Garage	someone pls tip me...........
	() Thanks

27th February 2006, 13:38	#13
turbo_v12 BHPian Join Date: Feb 2005 Location: Thane Posts: 457 Thanked: Once View My Garage	Think Satya's right here... Your mechanic has only done something to the exhaust system...As expansion chambers (stingers as u call them) can only be applicable to 2-strokes. As for a free-flowing exhaust, I think that if not done properly it adversely affects the exhaust valves...am i right? And it does affect the average also...just makes the bike sound better.
	() Thanks

28th February 2006, 21:54	#14
rankoz350 BHPian Join Date: Jan 2006 Location: Ghusais - Bangalore - Dehradun Posts: 94 Thanked: 0 Times View My Garage	yeah.... there was a drop in performance.... like the pick up reduced quite a bit, but it did great between 50-70 km/hr...... the exhaust valve is ported......
	() Thanks