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<blockquote data-quote="alvin24" data-source="post: 3119056" data-attributes="member: 63"><p>Tappets:</p><p>There is a special tool u can use to remove the tappets without removing cams actually. =p Some workshops have it... last time I changed mine also they used it. =p Did mine at SkyZone at Sunway Mas there.</p><p></p><p></p><p>Jun Cams:</p><p>As for the JUN cams, I'm merely stating my worries mah, since they never announced the availability for high cams for 4G93, its very highly doubt-able that they actually produced them. Again, its not meant to flame people selling it claiming its fake, but to bring up awareness to public when purchasing doubtful products... although that sooner is also an indirect effect, i meant for the latter, really.</p><p></p><p>I didn't know Mutiara workers are required to speak Japanese, neither can I think for a reason for them to. =p I worked in Toyota before also, but still haven't learnt enuff to strike a proper full conversation. =p Then i quit... too life-less to work there as a production engineer. =p </p><p></p><p>Anyhowz, we can't come up with a solution arguing like this. I tell u what... I'll email them, and post their reply here. =) I'm also curious to know if its really them manufacturing cams for 93s or not... again, not implying that its DEFINITELY fake. Just saying that its very doubtful.</p><p></p><p>p/s: I'm not saying GT auto and all are selling all fake products (claiming they're ori). I'm saying if u wanna order fake products from them, they can still get it for u. =p</p><p></p><p></p><p>Rebore issue:</p><p>Technically it would make more sense production wise to build the 4G92 and 4G91 block exactly the same only with different bores (water jacket positioning the same, etc)... because redesigning a block would involve a very very hefty price, including having different manufacturing lines for them rather than doing it in the same line.</p><p></p><p>But at the same time, many foreman has told me before they run very slightly. Thats the reason for people 4G92p plonk in 4g91 DOHC use paper gasket will leak after a while, and/or other weird issues arrises that suggests this.</p><p></p><p>I haven't personally measured, so I can't say for sure which is right/wrong... den again, if the offset has a difference also, its not gonna be easy to use a ruler and be able to tell that it run by 1mm. =p That method's accuracy is poor.</p><p></p><p>So this unfortunately still remains a very debatable topic till today. Many have done rebore and succeeded, while others that have failed would be totally against this. My take? Better safe than sorry... so I never rebored, and never suggested. For me I wasn't that willing to spend big on the 4g91, i do what I can... but when it comes to super extreme mods, I'd rather get a stronger platform to begin with. Thats just me, I know there are die-hard 4g91 fans out there who spend shitloads on theirs and the satisfaction gained is worth every penny to them. =)</p><p></p><p>My 4g91 kicked 170whp as my top record as a 4G91 running on stock internals at 0.8bar boost. Can whack stock GSRs, and be on par with some GSRs running 1 bar... okie la... happy enuff for me. For all I know those GSRs i play wif all potato thats why can win.. maybe I fight with healthy wan i lose leh? haha... too many variables to conclude that i can tapau all GSRs. =p Anything and everything can happen in a race mar. =)</p><p></p><p>Loads of $$$ invested, but the knowledge and experience gained is priceless. =) I'm sure many of u modders out there feel the same way! Unless u did a project spend 2k and end up car no difference... then maybe you'll be swearing away laaaa. hahaha... happened to me before also lar... I changed exhaust setup like 4-5 times on my 4G91 leh! haha... cannot find ngam wan end up spend summore. =p</p><p></p><p>About the bore 2mm issue pulak... I think its quite dependant on the engine itself lah. Some engines can rebore more safely. =p</p><p></p><p></p><p>shiet... damn chut long reply! Till here first!</p></blockquote><p></p>
[QUOTE="alvin24, post: 3119056, member: 63"] Tappets: There is a special tool u can use to remove the tappets without removing cams actually. =p Some workshops have it... last time I changed mine also they used it. =p Did mine at SkyZone at Sunway Mas there. Jun Cams: As for the JUN cams, I'm merely stating my worries mah, since they never announced the availability for high cams for 4G93, its very highly doubt-able that they actually produced them. Again, its not meant to flame people selling it claiming its fake, but to bring up awareness to public when purchasing doubtful products... although that sooner is also an indirect effect, i meant for the latter, really. I didn't know Mutiara workers are required to speak Japanese, neither can I think for a reason for them to. =p I worked in Toyota before also, but still haven't learnt enuff to strike a proper full conversation. =p Then i quit... too life-less to work there as a production engineer. =p Anyhowz, we can't come up with a solution arguing like this. I tell u what... I'll email them, and post their reply here. =) I'm also curious to know if its really them manufacturing cams for 93s or not... again, not implying that its DEFINITELY fake. Just saying that its very doubtful. p/s: I'm not saying GT auto and all are selling all fake products (claiming they're ori). I'm saying if u wanna order fake products from them, they can still get it for u. =p Rebore issue: Technically it would make more sense production wise to build the 4G92 and 4G91 block exactly the same only with different bores (water jacket positioning the same, etc)... because redesigning a block would involve a very very hefty price, including having different manufacturing lines for them rather than doing it in the same line. But at the same time, many foreman has told me before they run very slightly. Thats the reason for people 4G92p plonk in 4g91 DOHC use paper gasket will leak after a while, and/or other weird issues arrises that suggests this. I haven't personally measured, so I can't say for sure which is right/wrong... den again, if the offset has a difference also, its not gonna be easy to use a ruler and be able to tell that it run by 1mm. =p That method's accuracy is poor. So this unfortunately still remains a very debatable topic till today. Many have done rebore and succeeded, while others that have failed would be totally against this. My take? Better safe than sorry... so I never rebored, and never suggested. For me I wasn't that willing to spend big on the 4g91, i do what I can... but when it comes to super extreme mods, I'd rather get a stronger platform to begin with. Thats just me, I know there are die-hard 4g91 fans out there who spend shitloads on theirs and the satisfaction gained is worth every penny to them. =) My 4g91 kicked 170whp as my top record as a 4G91 running on stock internals at 0.8bar boost. Can whack stock GSRs, and be on par with some GSRs running 1 bar... okie la... happy enuff for me. For all I know those GSRs i play wif all potato thats why can win.. maybe I fight with healthy wan i lose leh? haha... too many variables to conclude that i can tapau all GSRs. =p Anything and everything can happen in a race mar. =) Loads of $$$ invested, but the knowledge and experience gained is priceless. =) I'm sure many of u modders out there feel the same way! Unless u did a project spend 2k and end up car no difference... then maybe you'll be swearing away laaaa. hahaha... happened to me before also lar... I changed exhaust setup like 4-5 times on my 4G91 leh! haha... cannot find ngam wan end up spend summore. =p About the bore 2mm issue pulak... I think its quite dependant on the engine itself lah. Some engines can rebore more safely. =p shiet... damn chut long reply! Till here first! [/QUOTE]
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