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VVT, VTC... so what
Topic Started: Apr 8 2006, 04:48 PM (1,159 Views)
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Datsun Taikor
ocphangaz
Apr 11 2006, 11:50 AM
vacuum is for the timing only... cookie,, your idle at 19, how come full advance only 20? should be more than 30... the mechanical advance is about +20 degrees advance. i think your vacuum hose got leak..

for the secondary jet... you can try is pop open your airfilter, see the carb.. start the engine, push the throttle from the carb... if the top butterfly open (rev above 3k) that means it is working. below 3k, even the throttle butterfly valve open, the secondary's top butterfly have not enough low pressure to open. the vacuum is dofferent from the MAT

MAT is using the vacuum or low pressure to activate from the primary venturi, while the secondary jet is the vacuum only in second venturi to open the second valve...

meet up at next TT so i can explain... hard to explain here because Hitachi306 is a bit different from normal carb.

master carb thank you for your explanation :P

me noob fella need master to lead the way :lol:

hehehe me no vacuum leaking to be frank my timing after I adjust already idle is 21 high rev or full throttle open is around 30+ :o

haha slow car like that one so no choice :(
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ficxky
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Administrator
good. so this saturday nite ?

btw where mr shab (volvo) gone ?
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zyfull
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Slow Driver
y my carb is different??where got one butterfly open at 3krpm...hope meet sifoo ocphangaz for better explaination about hidden power...care to share bro since im juz noobie...
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Datsun Taikor
zyfull
Apr 12 2006, 03:43 AM
y my carb is different??where got one butterfly open at 3krpm...hope meet sifoo ocphangaz for better explaination about hidden power...care to share bro since im juz noobie...

got carb open at 3k that is known as progressive carb B)
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sam1741
Expert Driver
hi all..
what is that advance timing thing?
after change to electronic distro.. still got working?
dono the stupid mech disconnect my hose or not..
my car damn underpower....

anyone got pic? thanks
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ocphangaz
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Datsun Taikor
check in datsun1200.com for pics.. if not come to next TT and i'll bring a real carb to explain :P sure have mechanical advance wan.

30advance already power la cookie... somemore your ignition coil got extra "spark"... sure lagi power wan... mine stock only
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ocphangaz
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Datsun Taikor
zyfull
Apr 12 2006, 03:43 AM
y my carb is different??where got one butterfly open at 3krpm...hope meet sifoo ocphangaz for better explaination about hidden power...care to share bro since im juz noobie...

when you engine cold start.. do you hear "glock-glock-glock" sound? thatis the second butterfly vibrating...

progressive is meaning the second butterfly only open at later stage of throttle....

but in hitachi306, there is another butterfly. it opens ONLY when there is enough vacuum in the second throttle (above 3krpm). this is to keep the fuel economy.. there is a site in the web explaining about it... forgot where is it already
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Datsun Taikor
ocphangaz
Apr 12 2006, 10:16 AM
check in datsun1200.com for pics.. if not come to next TT and i'll bring a real carb to explain :P sure have mechanical advance wan.

30advance already power la cookie... somemore your ignition coil got extra "spark"... sure lagi power wan... mine stock only

war...... need to go next TTT wanna c my sif000 lead the way :lol:

aiseh 30 advance is good but my engine gap I haven re-gap it so not optimise yet :(
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Datsun Taikor
ocphangaz
Apr 12 2006, 10:19 AM
progressive is meaning the second butterfly only open at later stage of throttle....

but in hitachi306, there is another butterfly. it opens ONLY when there is enough vacuum in the second throttle (above 3krpm). this is to keep the fuel economy.. there is a site in the web explaining about it... forgot where is it already

my carb yah uses vacuum to open the secondary plate. when it reaches above 3K the carb will open the butterfly.

even during idle I can fell the air going into the secondary plate as I tested before :)
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ocphangaz
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Datsun Taikor
cookie
Apr 12 2006, 10:55 AM
ocphangaz
Apr 12 2006, 10:16 AM
check in datsun1200.com for pics.. if not come to next TT and i'll bring a real carb to explain :P sure have mechanical advance wan.

30advance already power la cookie... somemore your ignition coil got extra "spark"... sure lagi power wan... mine stock only

war...... need to go next TTT wanna c my sif000 lead the way :lol:

aiseh 30 advance is good but my engine gap I haven re-gap it so not optimise yet :(

mine too.. long time didn't regap... not ocntinue studying.. starting to neglect my dattie :(

you la sifu.. i curi curi makan only

waiting for my pertronix to arrive
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cookie
Datsun Taikor
ocphangaz
Apr 12 2006, 03:16 PM
mine too.. long time didn't regap... not ocntinue studying.. starting to neglect my dattie :(

you la sifu.. i curi curi makan only

waiting for my pertronix to arrive

I'm planning to re-gap my my engine timing soon when I send my car for service as so far I can still drop to 2nd gear n rev until 8k no problem

but with fuel haik hmmm....... 6K enuf lar......... :lol:

where u got curi makan u show your true colours :o
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sam1741
Expert Driver
har.. why need to bring a carb..
i thought its somewhere near the distro..
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ocphangaz
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Datsun Taikor
easier to explain ma... no need to put head into dark dark hood... can lepak with teh tarik and touch touch carb... i sleep with my spare carb under my bed, 3 sport rims and 2 tyres in room and fuel line on table.
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ocphangaz
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Datsun Taikor
cookie
Apr 12 2006, 04:06 PM
ocphangaz
Apr 12 2006, 03:16 PM
mine too.. long time didn't regap... not ocntinue studying.. starting to neglect my dattie :(

you la sifu.. i curi curi makan only

waiting for my pertronix to arrive

I'm planning to re-gap my my engine timing soon when I send my car for service as so far I can still drop to 2nd gear n rev until 8k no problem

but with fuel haik hmmm....... 6K enuf lar......... :lol:

where u got curi makan u show your true colours :o

change the contact point to newer models wan.. new packaging with new nissan logo. the contact point not one round shape.. but donut shape.. got hole in center. so the point won't get too hot.

After i changed to bosch ignition coil with 1.8ohm resistance (meant for merc), the normal points keep hangus.. every 1-2 months the points totally burned out. fried is the right term actually...

then i changed to the newer ones at least didn't hangus. still makan the point, but after 2 months, still can use compared to the old ones hangus until cannot use.
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Datsun Taikor
master I respect u man :blink:
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