Cylinder Head 201 - Radius Cut Valve Job
This video covers the complete valve job process that your machinist might
perform. If the 100 series videos didn't help you identify and correct a
problem with your cylinder head, then this is the next step. This video is
brought to you with permission from my machinist in full 1080HD, and covers
cleaning up the head inside and out, preparation and setting up a radius
cutter, cutting all 16 valve seats, valve grinding, and spans 3.5 hours of
actual work in under 30 minutes. There's nothing like this anywhere else
THANK YOU BALLOS PRECISION MACHINE. Thank you for the professional
explanation and execution of a job excellently-done, and un-precedented
access to your facilities.
A valve job is done by re-grinding or replacing valves, and then having new
seats cut to match the faces of the valves you're using. There are several
different machines that might be utilized to achieve this result, but the
process is the same no matter how it's done. There are seat cutters that
utilize cutting stones. There are valve seat cutters with 3 separate
angles installed 120° out-of-phase, and there are single cutters with all
3 angles (radius cutter) that cut with one blade in one pass. The machine
demonstrated here is a Sunnen VGS-20 Radius Cutter. This machine (now out
of production) produces a gradual curved seat that's superior to the shape
of a traditional 3-angle seat. While a radius cutter does contain the 30,
45 and 60 degree angles, it does so without leaving any sharp edges between
My valve selection includes Supertech 1mm oversized nitride-coated
stainless steel undercut and back-cut intake valves, and 1mm oversized
Inconel back-cut Exhaust valves.
Inconel is a high-temperature alloy utilized in marine and forced-induction
performance engines that can handle more abuse than steel can without
melting. The other characteristics of the valves which are discussed
typically yield bigger gains in airflow than simply using a bigger hole and
a bigger valve.
Why I did this to a perfectly-good cylinder head:
I changed cams. Because the valves were previously recessed during another
valve job 9 years ago, my valve installed height was increased and this
raised the operating positions of my rocker arms. My new camshaft
selection dictates using the stock valve install height. The only
solutions to this valve install height problem are to either replace the
valve seats, or install oversized valves. I opted for the latter.
'97 RevSpeed DC2 & EK9 Time Attack
A rare RevSpeed video from '97 featuring the Spoon Sports DC2-R and K Shift
EK9 engaged time attack battle at the Tsukuba circuit. Mr.Spoon (Ichishima)
is driving the DC2R, though, doesn't seem to be one of his best races..
Skunk2 Pro 3 cams idling
Here's how Skunk2 Pro 3+ cams is idling. The knocking sound is from the
ultra stiff valve springs. Rev cut now is 10,000prm and usable power is
available until 9,500rpm. WIth B18CR N3E gearbox, 100km/h is reached in
second gear @ 9,300rpm.
Honda Integra Type R B18 225HP vs Honda Civic Type R K24 250HP
Recording:Panasonic Lumix FT1
CTR K24 248,5hp/272Nm
ITR B18 http://img843.imageshack.us/img843/7460/Dynoitr.jpg
integra type r stroker 1950cc 240hp
Test drive road "la plaine"
integra type r onboard
b18c6 / 240 hp Dyno
stroker b18c 92mm stroke 82 mm bore (1943 cm3) cp pistons
head ported and polished by billvtec.
camshaft skunk2 pro 2 / ferrea competition plus valvetrain /440 cc inj.
stock intake manifold port and polish by billvtec
mugen air box
sp. 98 pump gas
gear box ek9 with 4.4 final drive
preparation billvtec france.
bc racing coilover
spoon caliper with carbone rc5.