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how to increase torque and HP
Topic Started: Apr 8 2006, 04:07 PM (1,396 Views)
ocphangaz
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Datsun Taikor
one of the ways to improve air flow is port matching. different from port and polish... port and polish is to increase ans smoothen the ports, best with 3 angle porting.

port matching is to match the hole of the manifold and the engine head. or the hole of extractor to the exhaust of the engine head. no matter how smooth or big the port is, if it's not match with the manifold, there will be turbulence and air resistance. something like putting a finger at the end of hose with running water.

this is a relatively easy job, and cheap too!

first take out the manifold and mark with the head gasket... make sure you buy only the original gasket as it is 100% match the cylinder head. if you want you can also port match the cylinder head, but due to financial constraint.. i did only my manifold.

Posted Image

see the amount of meat i got to shave... it is marked by using the gasket using the screw holes as guide. up to 1mm at some places.

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end result inclusive of polishing ;)

total costs RM125

result? free rev up to 4k rpm with slight jab at throttle.
smoother and torquier pickup and continue up to 5krpm without hesitant.

difference is like between switching on and off the aircond on our underpowered vehicle
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ficxky
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Administrator
you diy yourself or what ?
aih.
i think i want to do it also ...
but dunno how to explain to the mech.
hehe :)
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zyfull
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Slow Driver
make me tempting...but now no $$$ no time to do...so bad.. <_< :(
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ocphangaz
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Datsun Taikor
if the mech got dremel and know about engine modification, tell him wanna do "port matching". got extra cash do together with port polishing for all intake and exhaust valve
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Datsun Taikor
simple job for a mechanic as they just need to follow the gasket pattern B)
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ficxky
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Administrator
oh ok :D
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ocphangaz
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Datsun Taikor
Posted Image

A15 comes with hardened valve seat. a must to use the newer unleaded fuel.

10 year old engine, no carbon deposit on valve seat


Posted Image
cyclinder 1 & 2

Posted Image
cyclinder 3 & 4

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Datsun Taikor
A15 engine keng man u respect :ph43r:
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ocphangaz
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Datsun Taikor
stock A15 la
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Datsun Taikor
ocphangaz
Apr 13 2006, 09:07 AM
stock A15 la

modify stock engine :lol:
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ocphangaz
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Datsun Taikor
cookie
Apr 13 2006, 09:49 AM
ocphangaz
Apr 13 2006, 09:07 AM
stock A15 la

modify stock engine :lol:

engine also never disassemble. i think the gasket still got write made in japan :P
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Datsun Taikor
ocphangaz
Apr 13 2006, 10:01 AM
cookie
Apr 13 2006, 09:49 AM
ocphangaz
Apr 13 2006, 09:07 AM
stock A15 la

modify stock engine :lol:

engine also never disassemble. i think the gasket still got write made in japan :P

better than me mar...... <_<
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ocphangaz
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Datsun Taikor
why? what happenned to your engine?
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Datsun Taikor
ocphangaz
Apr 13 2006, 10:18 AM
why? what happenned to your engine?

nothing just slow as usual :rolleyes:
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ocphangaz
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Datsun Taikor
T50 celica gearbox?
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