NISMO 46cc Heads inspected... to be installed \m/, ^_^ .\m/
#141
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Originally posted by x350Zx
Okay even with tuning would I be able to run the car on 91 octane? By swapping the VQ30 head in, won't I lose the Continuously Variable Valve Timing Control. Also can you explain what you mean by 3 angle valve job and would I be using the valves from the vq30 or vq35? Also while I'm in there shouldn't I swap to better springs and cams?
Let's say I swap the VQ30 head in after getting it ported and polished, get the valve job done, swap in new springs and retainers, get the ecu reflashed and redline extended to 7100, swap in some JWT cams, how much wheel hp am I looking at?
Okay even with tuning would I be able to run the car on 91 octane? By swapping the VQ30 head in, won't I lose the Continuously Variable Valve Timing Control. Also can you explain what you mean by 3 angle valve job and would I be using the valves from the vq30 or vq35? Also while I'm in there shouldn't I swap to better springs and cams?
Let's say I swap the VQ30 head in after getting it ported and polished, get the valve job done, swap in new springs and retainers, get the ecu reflashed and redline extended to 7100, swap in some JWT cams, how much wheel hp am I looking at?
#142
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Originally posted by x350Zx
Okay even with tuning would I be able to run the car on 91 octane? By swapping the VQ30 head in, won't I lose the Continuously Variable Valve Timing Control. Also can you explain what you mean by 3 angle valve job and would I be using the valves from the vq30 or vq35? Also while I'm in there shouldn't I swap to better springs and cams?
Let's say I swap the VQ30 head in after getting it ported and polished, get the valve job done, swap in new springs and retainers, get the ecu reflashed and redline extended to 7100, swap in some JWT cams, how much wheel hp am I looking at?
Okay even with tuning would I be able to run the car on 91 octane? By swapping the VQ30 head in, won't I lose the Continuously Variable Valve Timing Control. Also can you explain what you mean by 3 angle valve job and would I be using the valves from the vq30 or vq35? Also while I'm in there shouldn't I swap to better springs and cams?
Let's say I swap the VQ30 head in after getting it ported and polished, get the valve job done, swap in new springs and retainers, get the ecu reflashed and redline extended to 7100, swap in some JWT cams, how much wheel hp am I looking at?
#143
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^ Double Post
Wow 6-angle valve job has to be expensive. How much are the nismo blanks. They would have to be like buying new cams. So $1000 plus the cost of regrinds with is about $150-$200 per a cam from crane. So about $600-$800. So this is definatily race application, that is mucho money.
Wow 6-angle valve job has to be expensive. How much are the nismo blanks. They would have to be like buying new cams. So $1000 plus the cost of regrinds with is about $150-$200 per a cam from crane. So about $600-$800. So this is definatily race application, that is mucho money.
#144
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the cams come as blanks though, so I don't know if you can just regrind them, or if its more specialized than that?
Last edited by Z1 Performance; 04-28-2004 at 02:38 PM.
#145
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INJECTORS
There was absolutely too much information in an article about injector sizes that i read in GRM magazine, so you'll have to get it or go to there website to read it, basically addressing the issue of injector size. In short it stated that engineers use the smallest injectors for the target hp. (for multiple reasons; fuel efficiency, smooth idle at low rpm and emissions) If you start adding hp with bolt-ons you could be running too lean (regardless of the octane) and not getting the full benefit of your hard earned money you spent on all those parts and eventually ruin your engine in the process! So basically if your adding hp you need to use the formula they give, which they state is an industry standard, get the appropriate size INJECTORS adjust your timing and get an ecu flash as necessary.
#146
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VQ30DE Steel valve;
Face In: 36.0 - 36.3mm
Face Ex: 31.2 - 31.5mm
Stem In: 5.965 - 5.980mm
Stem Ex: 5.945 - 5.960mm
Length In: 97.32 - 97.82mm
Length Ex: 94.85 - 95.35mm
Valve seat angle 45º15' - 45º45'
VK45 Titanium valve;
Face In: 36.0 - 36.3mm
Face Ex: 31.2 - 31.5mm
Stem In: 5.972 - 5.980mm
Stem Ex: 5.962 - 5.970mm
Length In: 96.57mm
Length Ex: 94.50mm
Face In: 36.0 - 36.3mm
Face Ex: 31.2 - 31.5mm
Stem In: 5.965 - 5.980mm
Stem Ex: 5.945 - 5.960mm
Length In: 97.32 - 97.82mm
Length Ex: 94.85 - 95.35mm
Valve seat angle 45º15' - 45º45'
VK45 Titanium valve;
Face In: 36.0 - 36.3mm
Face Ex: 31.2 - 31.5mm
Stem In: 5.972 - 5.980mm
Stem Ex: 5.962 - 5.970mm
Length In: 96.57mm
Length Ex: 94.50mm
#147
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VQ35DE Steel valve
Face In: 37.0 - 37.3mm
Face Ex: 31.2 - 31.5mm
Stem In: 5.965 - 5.980mm
Stem Ex: 5.955 - 5.970mm
Length In: 96.12 - 96.62mm
Length Ex: 93.65 - 94.15mm
Valve seat angle 45º15' - 45º45'
Well it appears that I ahve been beaten to the punch of playing around with VK45 valves. I plan to see what is involved in fitting the VK45 exhaust valves into some stock VQ35 cyl heads. New shims should do the trick.
Face In: 37.0 - 37.3mm
Face Ex: 31.2 - 31.5mm
Stem In: 5.965 - 5.980mm
Stem Ex: 5.955 - 5.970mm
Length In: 96.12 - 96.62mm
Length Ex: 93.65 - 94.15mm
Valve seat angle 45º15' - 45º45'
Well it appears that I ahve been beaten to the punch of playing around with VK45 valves. I plan to see what is involved in fitting the VK45 exhaust valves into some stock VQ35 cyl heads. New shims should do the trick.
Last edited by SR20DEN; 06-06-2004 at 05:42 PM.
#151
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hey has anyone successfully installed these heads yet? If so what all is required to do so? What were the gains? I WAS interested in these but after reading this thread I think my interest has gone more the the AEBS stroker kit....
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