DIY - DX/LX head swap to EX Vtec
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Originally Posted by Nokturnl
umm, yeah. The head (esp. if milled) Will have a higher compression. With out vtec running you will have a better cam profile anyways to boot. The EX cam is hotter than the LX/dx ...not by much but every little bit helps!
Do not do this swap and NOT wire in a VAFC. Unless Vtec is engaged your only gonna have 1 intake valve open, Vtec is what allows BOTH valves to open.
I did my swap and had to wait a week for my VAFC and let me tell you above 5000 rpm to car did NOT have any power, again due to only 1 intake valve open. So boosting and not having VTEC makes no sence what so ever, it would probley cause harm to the engine if anything.
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Originally Posted by DIZZLE
Do not do this swap and NOT wire in a VAFC. Unless Vtec is engaged your only gonna have 1 intake valve open, Vtec is what allows BOTH valves to open.
I did my swap and had to wait a week for my VAFC and let me tell you above 5000 rpm to car did NOT have any power, again due to only 1 intake valve open. So boosting and not having VTEC makes no sence what so ever, it would probley cause harm to the engine if anything.
I did my swap and had to wait a week for my VAFC and let me tell you above 5000 rpm to car did NOT have any power, again due to only 1 intake valve open. So boosting and not having VTEC makes no sence what so ever, it would probley cause harm to the engine if anything.
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Originally Posted by dannn
can you elaborate
http://www.7thgencivic.com/forums/sh...d.php?t=188161
cause they explain more about how vtec works on SOHC engines
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Originally Posted by joshb_
i read threw a few pages on this and couldnt find it...sorry if it was already anwsered....can you just a use a vafc instead of a vafc2
http://www.7thgencivic.com/forums/sh...d.php?t=155261
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Originally Posted by dannn
i heard you cant use the vafc
somone said only the vafc 2 works for the swap
somone said only the vafc 2 works for the swap
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Rep Power: 273 anyways to stay on topic about the head swap.. my car is still running fine.. i even have video of it running last week at the races
http://www.xproductionz.com/mycar/mycivic.wmv
http://www.xproductionz.com/mycar/mycivic.wmv
#133
Re: DIY - DX/LX head swap to EX Vtec
i am thinking really hard about doing this swap, im new to the honda realm, but can you use the same block?? how much gain is achieved? with a motor with 180000miles+ would there be any issues with that?
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That's the whole idea of doing a head swap, non?
You tell us. depending on how the engine is, you might better off dropping a used engine with less miles.
create a new thread explaining that you have read this thread, BTW. this thread is supposed to be for reference to others
You tell us. depending on how the engine is, you might better off dropping a used engine with less miles.
create a new thread explaining that you have read this thread, BTW. this thread is supposed to be for reference to others
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I know this is an old post but just wondering if anyone else has done it or if there is anything extra I should do. I am looking for a head now and I already have a guy lined up that will clean it up for me and do a good valve and spring job. Just looking for any pointer. Anyone know how much you can shave the head and deck the block and still be safe. Ive done jobs like this before but on the gm 2.2. We had a 96 head on a 2000 block. It had 245 lbs of compression but only made about 6 races.
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I know this is an old post but just wondering if anyone else has done it or if there is anything extra I should do. I am looking for a head now and I already have a guy lined up that will clean it up for me and do a good valve and spring job. Just looking for any pointer. Anyone know how much you can shave the head and deck the block and still be safe. Ive done jobs like this before but on the gm 2.2. We had a 96 head on a 2000 block. It had 245 lbs of compression but only made about 6 races.
as for power you could do a cam upgrade to stage 1, stage 2 if you have kpro or aem ems and upgraded valve springs. if you REALLY want u could add high compression pistons and valves but i dont think that would yield enough power to justify all that work.
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you do not want to mill the head past the service limit, esp not to raise compression. you will blow the gasket in no time. 128psi is the stock compression rating, and any knowledgeable machine shop should know the service limit for milling if the head even needs it. i can try and search for it in the service book, but its not much at all. i think one milling is pretty much it before you have to junk the head.
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Im not looking for super high compression and I know its not going to give it that much more power. The problem we had with the gm 2.2 is the rods keep breaking. I havent had a D17 apart but I know some of the older honda motors came with extra meat you could cut down. We fixed one guys d16 and he ended with 170lbs compression. Its been 2 years later and still running strong. Im not spending the money on new rods and pistons, like pwnsauce said not enough power to justify the cost but I do have a new set of bearings ready to throw in while I have the head off. I just did the timming belt and water pump 10k ago but Im the type of person that if I have something apart then I replace what I can while im there.
#140
Re: DIY - DX/LX head swap to EX Vtec
im getting ready to do the swap but im swapping in the whole motor needed a transmission got a ex package deal i couldn't pass up i am planing on doing it with the vafc2 i am just a little curious what the sensor under the vtec plug is and does it have to be used or just left open thanks
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WARNING! this is not for the faint of the heart, have not been finished yet and not worthy if you do not have the rocker arms, cams, vtec solenoid laying around, but very interesting project that another forum member is trying to do.
http://www.7thgenhonda.com/forum/showthread.php?t=25485
he is trying to convert a LX head in a EX head! only for the mechanical savvy guys, not for the runts that need to ask how-to. if you feels like asking, then it's not fer yah! you will be disqualified right there.
http://www.7thgenhonda.com/forum/showthread.php?t=25485
he is trying to convert a LX head in a EX head! only for the mechanical savvy guys, not for the runts that need to ask how-to. if you feels like asking, then it's not fer yah! you will be disqualified right there.
Last edited by sdaidoji; 12-25-2011 at 10:33 AM.
#143
Re: DIY - DX/LX head swap to EX Vtec
how you will connect the vtec wiring??
i changed my motor with a vtec one.. but i dont know where to connect the EGR and the vtec valve??
can we connect them externally ??
i changed my motor with a vtec one.. but i dont know where to connect the EGR and the vtec valve??
can we connect them externally ??
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I was gonna see if it was just a hot linking issue. I've been able to resurrect pages when that was the issue. Unfortunately, Mike (I think that's what xproductionz's irl name was) hosted it on his site -- that he doesn't have anymore. He also had a comprehensive k20 swap diy guide on his site, but now it gone. Sorry bud.
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I was gonna see if it was just a hot linking issue. I've been able to resurrect pages when that was the issue. Unfortunately, Mike (I think that's what xproductionz's irl name was) hosted it on his site -- that he doesn't have anymore. He also had a comprehensive k20 swap diy guide on his site, but now it gone. Sorry bud.
#147
Re: DIY - DX/LX head swap to EX Vtec
i have a d17a1 and my buddy crashed his d17a2 can i take the head ,ecu , harness, and immobilize and slap it into my car without having to flash the key ? and is there any thing else i would have to take to make it work?
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