NA Build Inside....Soup to Nuts :)
01-17-2008, 12:14 PM
#402
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valve timing? valve timing is not adjustable on the Z unless you have VTC gears or a standalone. The 268's are designed around a stock VTC curve -it would be trial and error beyond that
01-17-2008, 12:25 PM
#403
Yes - all cams are designed with stock VTC curve.
I do have the ability to adjust valve timing.. and with valve timing info its much easier to calculate the theorical VTC curve to start with as the sweet spot of cam timing is pretty narrow.
I read from one of your posts saying that you have got the valve timing specs from Tomei by asking.. and would provide it to whoever needs the info... so I asked
It'd be greatly appreciated if you can help me out here.
Thanks
I do have the ability to adjust valve timing.. and with valve timing info its much easier to calculate the theorical VTC curve to start with as the sweet spot of cam timing is pretty narrow.
I read from one of your posts saying that you have got the valve timing specs from Tomei by asking.. and would provide it to whoever needs the info... so I asked
It'd be greatly appreciated if you can help me out here.Thanks
01-17-2008, 02:04 PM
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Originally Posted by Z1 Performance
my cost and your cost would be 2 totally different things, since we assembled the motor here, and did all the swap work (taking my old motor out, and installing the new motor) in house. Also, machine work, for the heads and plenum just as an example, vary greatly from shop to shop, so there is no way for me to quantify this. You would be best off consulting an engine builder and asking what they would get for it with full head work, block machining, balancing, etc.
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01-17-2008, 02:07 PM
#405
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Originally Posted by bleunetizen
Yes - all cams are designed with stock VTC curve.
I do have the ability to adjust valve timing.. and with valve timing info its much easier to calculate the theorical VTC curve to start with as the sweet spot of cam timing is pretty narrow.
I read from one of your posts saying that you have got the valve timing specs from Tomei by asking.. and would provide it to whoever needs the info... so I asked It'd be greatly appreciated if you can help me out here.
Thanks
I do have the ability to adjust valve timing.. and with valve timing info its much easier to calculate the theorical VTC curve to start with as the sweet spot of cam timing is pretty narrow.
I read from one of your posts saying that you have got the valve timing specs from Tomei by asking.. and would provide it to whoever needs the info... so I asked
It'd be greatly appreciated if you can help me out here.Thanks
Last edited by Z1 Performance; 01-17-2008 at 02:16 PM.
01-17-2008, 02:12 PM
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Originally Posted by ke0ki2k
how important was the bottom end build to the car anyhow? I mean I know you had to balance it and throw in stronger rods & bearings to turn those rediculous RPM's yours does. but if one were wanting to keep it down to like 7500-7700 RPM's with similar power band to yours, could ya do it just building the top half of the engine? maybe Nismo heads, cosworth manifold, and some HIGH lift cams with like 268-272 duration (along with all the other stuff I dont feel like listing )?
)?Many of the high lift NA cams worth having also won't work with stock pistons...they would need machining for proper valve clearance.
Last edited by Z1 Performance; 01-17-2008 at 02:16 PM.
01-17-2008, 02:16 PM
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gotcha gotcha...so your engine is basically ok to have the **** run out of it for years to come? lol and cams that run like...11.5mm lift wont work with stock pistons?
Last edited by ke0ki2k; 01-17-2008 at 02:24 PM.
01-17-2008, 02:24 PM
#408
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I didn't want a motor I'd have to rebuild, so this is designed to be as robust as it needed to be, to last me for as long as I'd ever need
I suppose it would depend on the cam. Tomei I know says that over 11.0, at least for their cams, will require reliefs cut into the pistons
" The above camshafts are sold as a pair for each side, either Inlet or Exhaust.
* Cams with cam lift greater than 11mm will require the valve springs to be upgraded as well.
* Cams with cam lift greater than 11mm will require valve recession on the standard pistons as well.
* Not compatible with engine models with variable valve timing (eVTC) on the exhaust side.
(Also not compatible with the Z33 Anniversary edition from Sept 2005 onwards)."
I suppose it would depend on the cam. Tomei I know says that over 11.0, at least for their cams, will require reliefs cut into the pistons
" The above camshafts are sold as a pair for each side, either Inlet or Exhaust.
* Cams with cam lift greater than 11mm will require the valve springs to be upgraded as well.
* Cams with cam lift greater than 11mm will require valve recession on the standard pistons as well.
* Not compatible with engine models with variable valve timing (eVTC) on the exhaust side.
(Also not compatible with the Z33 Anniversary edition from Sept 2005 onwards)."
01-17-2008, 02:27 PM
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well that clears alot of confusion up. regardless I'm kinda screwed in the exhaust cam department. I read BC is gonna make some revup cams, is Tomei gonna come out with any?
02-12-2008, 02:57 AM
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Posting removed at thread owner's request. Sorry for attempted thread jacking. Will generate new post in appropriate sub-forum.
-LamaZ
-LamaZ
Last edited by lamaz; 02-18-2008 at 02:50 PM.
02-18-2008, 07:37 AM
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whens this 4.2 liter high compression N/A build comin Kwame? maybe a Haltech platinum with ITBs and Nismo Spec 2 heads/cams? 
go WILD! 450 bhp N/A here we come!
go WILD! 450 bhp N/A here we come!
Last edited by ke0ki2k; 02-18-2008 at 07:39 AM.
02-18-2008, 08:18 AM
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Yep we fixed the rear main seal issue several months ago, and all has been perfect! Hopefully once the backorders are filled a spare manifold will present itself for me to try
Kwame's car is coming along - we should see the motor back here soon and then we'll start his assembly. He will be running a Haltech from the looks of it, as we have the NISMO VTC pullies, which we need to control because of his cams (Tomei 280's) and right now the Haltech looks to be the best bang for the buck. We have thought about ITB's but I don't think its worth the price of admission for a street car - way too costly to do properly, since no one even makes an airbox (which is the only way to do it correctly unless you cut a giant hole in the hood). Kwame's heads are fully built, all done by our same engine builder
Kwame's car is coming along - we should see the motor back here soon and then we'll start his assembly. He will be running a Haltech from the looks of it, as we have the NISMO VTC pullies, which we need to control because of his cams (Tomei 280's) and right now the Haltech looks to be the best bang for the buck. We have thought about ITB's but I don't think its worth the price of admission for a street car - way too costly to do properly, since no one even makes an airbox (which is the only way to do it correctly unless you cut a giant hole in the hood). Kwame's heads are fully built, all done by our same engine builder
02-18-2008, 08:21 AM
#417
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Originally Posted by aggietsi
Ever get the RMS replaced?
02-18-2008, 08:52 AM
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Said so WELL!
Originally Posted by dTor
I've only read the first and last pages of this thread, so I'm sure this has already been mentioned, but...
THANK YOU!! Firstly, for finally doing something that I've long wanted to do, but lacked the resources for proper R&D of what parts will work best.
Mostly, I want to thank you for NOT using so-called "top of the line parts (i.e. Carrillo rods, Arias pistons and the like). Most knowledgeable builders know that such expensive parts are NOT necessary, but it seems that all too often many, if not most, consumers (at least for our cars) seem to be under the impression that if they don't spend at least $2k-$3k on their rotating assembly then it's just junk. What they fail to realize is the Eagle has been making very high quality, but reasonably priced engine components for many years in the domestic market. Same with Wiseco. Also, much applause for using the stock crank, valves, heads, and bearings.
With the exception of the headwork done and the B&B of the rotating assembly, this could one day be a very affordable build, once more builders get experience and get into the market and (hopefully) bring prices down a bit.
THANK YOU!! Firstly, for finally doing something that I've long wanted to do, but lacked the resources for proper R&D of what parts will work best.
Mostly, I want to thank you for NOT using so-called "top of the line parts (i.e. Carrillo rods, Arias pistons and the like). Most knowledgeable builders know that such expensive parts are NOT necessary, but it seems that all too often many, if not most, consumers (at least for our cars) seem to be under the impression that if they don't spend at least $2k-$3k on their rotating assembly then it's just junk. What they fail to realize is the Eagle has been making very high quality, but reasonably priced engine components for many years in the domestic market. Same with Wiseco. Also, much applause for using the stock crank, valves, heads, and bearings.
With the exception of the headwork done and the B&B of the rotating assembly, this could one day be a very affordable build, once more builders get experience and get into the market and (hopefully) bring prices down a bit.
02-18-2008, 08:56 AM
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Originally Posted by Z1 Performance
Yep we fixed the rear main seal issue several months ago, and all has been perfect! Hopefully once the backorders are filled a spare manifold will present itself for me to try
Kwame's car is coming along - we should see the motor back here soon and then we'll start his assembly. He will be running a Haltech from the looks of it, as we have the NISMO VTC pullies, which we need to control because of his cams (Tomei 280's) and right now the Haltech looks to be the best bang for the buck. We have thought about ITB's but I don't think its worth the price of admission for a street car - way too costly to do properly, since no one even makes an airbox (which is the only way to do it correctly unless you cut a giant hole in the hood). Kwame's heads are fully built, all done by our same engine builder
Kwame's car is coming along - we should see the motor back here soon and then we'll start his assembly. He will be running a Haltech from the looks of it, as we have the NISMO VTC pullies, which we need to control because of his cams (Tomei 280's) and right now the Haltech looks to be the best bang for the buck. We have thought about ITB's but I don't think its worth the price of admission for a street car - way too costly to do properly, since no one even makes an airbox (which is the only way to do it correctly unless you cut a giant hole in the hood). Kwame's heads are fully built, all done by our same engine builder