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 Basic Intake and Exhaust Modification Guide, for normal aspirated cars v1.0

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kokhing520
post Aug 8 2011, 07:17 AM

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can i know that wat is the different between spiral bullet and straight bullet?

compare between that two....
neither 1 spiral bullet will cause better performance and FC..
Or 2 Straight bullet will cause better performance and FC..???
kokhing520
post Oct 12 2011, 06:06 PM

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I want to ask ... Which distance is best for auto 1.0 from bullet tO the midbox and then to the tip?
kokhing520
post Oct 13 2011, 04:24 AM

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QUOTE(kokhing520 @ Oct 12 2011, 06:06 PM)
I want to ask ... Which distance is best for auto 1.0 from bullet tO the midbox and then to the tip?




best setup consists of either one midbox or one bullet only, if u need more than one to be satisfied, it simply means the piping is too big in diameter

generally keep at least 30-45" of pipe between extractor and bullet but this is not entirely accurate. need to know engine spec and cam timing to know for sure
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currently my setup is..
- 3-1
- straight flow with modify bullet (to increase backpressure)
- big S-flow muffler
- piping 1.6"
kokhing520
post Oct 13 2011, 08:54 PM

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QUOTE(upontheriversky @ Oct 13 2011, 12:10 PM)
what engine is ur 1.0?

honestly 1.6" is too big, mine is kelisa and used to have 1.6" piping and sflow and it is not fast at all, pickup is fairly good but later on high gear felt like driving lorry, slow and no torque boost at higher rpm, FC becomes higher because i kept on pushing the car as it wont accelerate faster at high gear speed, it was worst than my stock piping, standard muffler with 3-1 extractor. i was very disappointed and that was when i start studying about all these exhaust stuff

it is a standard setup from every exhaust shop i went for 1.0, where they suggest 1.6" pipe and use sflow to increase backpressure from that 1.6" pipe

i have seen a kelisa 1.0 with stock 1.3"-1.4" piping, change extractor, straight bullet and straight flow muffler and the performance is really satisfying. the exhaust sounds fast and the feeling not like lorry at high gearing speed. definitely way faster than my last 1.6" and sflow setup

if u can have access to ur stock pipe again, i strongly suggest u get them back on, put straight bullet in the middle and custom a 1.5" straight flow muffler at supercircuit for rm350++. if budget does not allow, 2" straight flow is more readily available sometimes at cheaper price, but most importantly get smaller piping

trust me, u will gain much more power in ur driving at all rpm, guaranteed. 1.6" is superb on 1.3 myvi auto
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Really appreciate on your explanation bro!! thumbup.gif
currently engine if not mistaken..should be EJ-VE..
so...wat is the size of the piping u recommanded?

kokhing520
post Oct 17 2011, 12:56 AM

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QUOTE(upontheriversky @ Oct 13 2011, 12:10 PM)
what engine is ur 1.0?

honestly 1.6" is too big, mine is kelisa and used to have 1.6" piping and sflow and it is not fast at all, pickup is fairly good but later on high gear felt like driving lorry, slow and no torque boost at higher rpm, FC becomes higher because i kept on pushing the car as it wont accelerate faster at high gear speed, it was worst than my stock piping, standard muffler with 3-1 extractor. i was very disappointed and that was when i start studying about all these exhaust stuff

it is a standard setup from every exhaust shop i went for 1.0, where they suggest 1.6" pipe and use sflow to increase backpressure from that 1.6" pipe

i have seen a kelisa 1.0 with stock 1.3"-1.4" piping, change extractor, straight bullet and straight flow muffler and the performance is really satisfying. the exhaust sounds fast and the feeling not like lorry at high gearing speed. definitely way faster than my last 1.6" and sflow setup

if u can have access to ur stock pipe again, i strongly suggest u get them back on, put straight bullet in the middle and custom a 1.5" straight flow muffler at supercircuit for rm350++. if budget does not allow, 2" straight flow is more readily available sometimes at cheaper price, but most importantly get smaller piping

trust me, u will gain much more power in ur driving at all rpm, guaranteed. 1.6" is superb on 1.3 myvi auto
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so..bro..if i use 1.5" pipe will i get the same result as 1.6" since they jus diffe 0.1"?
Straight muffler? how abt S-flow muffler?

kokhing520
post Oct 18 2011, 02:32 AM

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QUOTE(upontheriversky @ Oct 17 2011, 06:48 PM)
u will be surprised with how different the car goes with 0.1" pipe change. increasing pressure in exhaust increases gas velocity in squares i.e. 2 pressure increase = 4 velocity increase, 3 pressure = 9 velocity. so u can imagine how 0.1" change can make lots of difference

if backpressure happens, the velocity will be reduced in same fashion too

i only know straight flow setup bro. have to ask others who have experience with sflow in their setup


Added on October 17, 2011, 6:54 pm

may i ask what is the muffler spec? and any mod on stock piping?
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can u share your straight flow full setup ?
u manual or auto??
kokhing520
post Feb 26 2012, 02:47 AM

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my car setup currently is
3-1 extractor
flexible pipe(2")
stock bullet (1.5")
fake apexi S-flow muffler (2")

piping from extractor to stock bullet is 1.6"
piping from stock bullet till the end is 1.5" (stock piping)

wat i facing is RM50 for my viva
always be on MRR2 from kepong to setapak..
80-100 km/h , normally not over 3k rpm..
i only can get 330km for rm 50...

any suggestion?? >< Thx
kokhing520
post Aug 14 2013, 12:01 AM

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any suggestion for saga 1.3 CVT exhaust system?
does CVT need the same back pressure with AT?


 

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