Hi guys, It's my understanding (and confirmed by several people) that RB26 Solid lifters, valves and springs will fit in the VG30 head. I'm getting a full valve job done and going to solid lifters, stiffer springs and oversize valves and the cheapest way seems to be using RB26 OEM or aftermarket parts, since theres more support and hence lower prices/better availability. Can anyone either confirm or deny this with experience? I am also looking at getting some JWT hduty springs from coz or sourcing locally, and using .5mm oversize RB26 valves (which are already .5 larger than the vg30 ones) for a total of 1mm oversize. I will use oem rb26 solid lifters. Cams will be custom grind for 8mm lift. Any advice or where to source heavy duty springs locally? postage from US is like $150 for a set of springs, making it $500 or so to get from COZ/Z1.
Why not just go with lifters springs and cams suited to the vg ? A lot less fussing about in the End?
You know how much it is for a set of new OEM lifters for the vg? Can only assume solid would be as or more expensive...
Doing all that work on a "cheap" scale is a contradiction to me lol U mean if it's doable and will be as strong for less than go for it .
I did a little research on this a cpl of years ago and can say that at least the parts I looked at were very different and there wasn't any sensible way to make it work. So from what I have seen RB26DETT valves train parts in VG30DETT = no it will not work. I can not confirm that there are or are not different versions of the valve gear in the RB26DETT though - I do not THINK there are any significant changes but can not confirm with evidence etc.
it seems possible if you do a custom job on the exhaust valves, custom valve guides to suit oversize stem valves... take a look here http://www.supertechperformance.com/ivalves.html?id=8 but i don't know about the lifters thou...
Well alot of places sell a set of lifters (such as jun) VG30DETT, RB26DETT, RB20DET compatible. They are the same diameter as far as specs and looking at the two next to each other, so I'm hoping they will fit. But yeah might have to price that supertech stuff, just seemed really expensive last time I checked. It's mainly the solid lifters that are so expensive, so was hoping to use the RB26 ones. $600 for aset of solid lifters for VG is just too much lol... I'm sure rb26 oem ones are cheaper. And yeah, was gonna get bronze valve guides so would get ones to suit the rb26 valves if used.
You will find the difference is in the thickness of the lifter base and how much shiming is required. Some vary more than 2mm in height when used on different engines
So as long as it's shimmed out enough the RB26 ones should work then... probably saves 300-400$ which can go elsewhere!
As long as there is room to shim them Guess you could get hold of one and see how much or little it needs
Would be cheaper than tomei solid lifters for $600. Also it says on the page for tomei lifters etc that you require the tomeir or JWT solid lifter cams, what is the difference in the cam besides the lift? Surely you can custom grind a stock cam to suit solid lifters right? Can anyone shed light on this?
8mm lift was a mistake. probably going cams with 10.5mm - 11mm lift. will be built for high revs so need the lighter lifters ect to prevent valve float. We are building the heads with 5 angle and radius intake valve seats, radiused exhaust seats, oversized valves, heavy duty springs, titanium retainers. port and polish, bored throttle bodies with custom butterfly valves with upper and lower plenums port matched.
Solid lifters are much lighter and allow more lift, require different cams, but take a lot more time to set up correct clearances. GTR retainers are the only GTR part you can use. Later model Nissan motors such as VQ motors use solid lifters, also R34 GTT. We did solid lifters on our race car back in 2005, as well used 4 exhaust cams and lots more. The engine was tough but noisy.
How often do you need to do the valve clearances with solids? don't really want to be adjusting shims every 5000kms It's my understanding that rb20/25 and ca18 lifters are exactly the same (29mm diameter) but RB26 ones are 30mm. The reason I wanted to use RB26 ones is that they came stock as solid so I can get them much cheaper, aftermarket rb20/25 ones won't be cheaper than than aftermarket vg ones. Can the head not be modified to suit the 30mm solid lifters from the RB?
Any money you save by buying second hand RB26 lifters will be wasted in extra machining and buying shims and a whole crap load of extra time. As I said they do not simply fit in the engine, John has confirmed this. Z1 sells Tomie lifters for $528 US, IMO that is cheap for what you are getting & with the right shims they WILL fit as easy as is possible.
Postage is like $150 for the lifters from coz last time I checked, so it becomes $500 more than getting rb ones here. The machining isn't costing me so it's $500 that could be spendt elsewhere tbh. I don't have an infinite supply of money to throw at this
