from another forum wrote:
OST: I have a couple of inquiries relative to this entire thread? Specifically, 1.) how do you keep the set screws on the manifold from vibrating loose on a running engine?1)
2.) What is an approximate cost for you to duplicate a 16V head just like the one in this post?
3.) How many hours of labor does it require to duplicate if you do it.
This post and your pics are outstanding!! You are to be commended for your prowess as a head porter/developer.
Locktite 290 2)
It depends... Anywhere from $1000 and up... price depends on many things... some excluding my porting work*
Who is supplying the smallport head, and ITB adapter? (smallport heads are tough to come-by recently...)
Is the head in basic usable condition? That means it has the cam caps w/ good journals, it has good valve guides, and good valve seats.
Do you want OEM valves, OEM back cut valves, or aftermarket valves?
You will need aftermarket valve springs to function w/ 9mm lift cams
Do you want Toyota, or aftermarket valve seals?
* - my current pricing for porting work on a 4AG 16V head -
$600 (minimum service) to do the 16 bowls/seats, taper the valve guides, deshroud and balancing chamber volume, exhaust port re-taper, and polishing.
$150 to blend the intake guide bosses and to re-taper port roof - largeport
$175 to blend intake guide bosses, blend port walls, and re-taper port roof - smallport
$100 for machining of the heads surface
$80 for cam journal deburring and polishing, and overall deburring
$80 for hand lapped valves
$60 for re-assembly
$60 to set valve clearances - your supplied camshaft, special order shims not included
$80 to adjust T3 smallport/largeport adapter
$140 to blend T3 ITB manifold for silvertop throttles
$220 to blend T3 ITB manifold for blacktop throttle
Loynings valve jobs - a few hundred to a few thousand3)
Since it isn't finished yet, the best I can give you is a ballpark time estimate - 50 to 60 hours.
Just a small detail for me... but so much easier on my client when it comes to assembly, and fitment... check out the injector port clearancing
More to come.....