valve time ohc baby

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Well the head is almost there and its time to concentrate on valves and so on.

anyway i'l be doing max 22psi maybe 6500rpm if it holds. runs lpg
will be going nos when things are sorted

dont want to spend the earth just good for my needs, its an ohc engine.

what valves/ rtainer/lock combo should i look at?

i need to use an extra 60thou spacer under the hydrolics
im using a wade regrind thats as bigg as i can go with std springs.
holdn a9x valves could be used they have an extr 60thou in length thus eliminiting need for the spacer.????

all valvetrain will be cryogenically treated.

any ideas/ suggestions? what are other ppl using?

Pumba.
 
ok ........
the cam u are using is a wade 1004 112..... same as me
I warn you about valves, as they get larger and because they run on an angle, the edge of the valve needs to travel less, before it hits a piston... since you are running turbo, id say you wount have flat top pistons or a shaved head...
i recomend using a crow vernier gear...

By the way if you want to use bigger valves, get the seats cut 60 thou deeped into the head, that way you will have greater piston to valve clearance, and you wont need a shim for youre lifters just a thought any way
 
im keeping to standard size valves.looked into recessing the seats but the machine shop say too expensive. gotta find out.

i'm using acl race series pistons for the3.9.. the ones with a valve cut out, i'm assuming that being desingned for high comp, they would have to allow that people would run a big cam.,

why would i need the crow gear???
is the cam timing real bad on the wade??

are the standard valves and locks good enough for poundige and nitrous??
 
dynoed250 are you runnig an ohc motor, just want to know.
how quick are you running? with wat type of combo?
 
Anyone? just need one answer are the standrd bits good for boost and nos?
 
What, advanced OHC engines. How long have Ford been making them?LOL!

Your gonna think I'm being a smart b@$+@rD over this, but an OHC is a complicated beast!

The Falcon cammers have great standard parts, but you can't mix and match bits. The rocker ratio cahnges, the dozens of alloy casting revisions, head gasket and cam and vlave changes, whew!

I've heard of lots of combos, but haven't ever dabled with them. The OHC is a stout kit. I'd talk to punters like Mal Wood, the 5 and 6-speed Tremec man. He raced early OHC Falcons via blue printing bits in Groupe E for years. The XR6 was rallyed in Groupe N.

There is 35 years of Ford OHC technology in the Falcon OHC. Most of it from the 1980 Escort CVH headed engine, which shares much of the architecture with the SOHC Falcons.

If they are anything like the Pinto OHC valve geometry, then you'll need specific advice. When you have lengthened or shortened valves, then effective rocker ratio changes, and some rockers glide off the valves with awfull results. Collets, retainers, seals have changed too, alog with the grade of head bolts.

The reason why information looks locked up with EA-EL and AU engines is that a huge amount of well monied development has been done by Ford, Jim Mock, Herrods, and Crow, and others. You don't share all the secretes, they permeate out form there clients.

If I was doing an OHC, I would keep it as close to XR6 spec as possible, and then blue print everything to factory specs. I don't read up on the OHC engines as much as I should, as there is a raft of claim and counter claim on the aftermarket, and so much darn noise in the market place, there is no one person to tune into.

If you are looking for quick info, I'd suggest buying it. The other option is doing a google search of Cortina OHC Pinto and Lima 1.6/2.0/2.3 engines, and the Escort (US and British) 1.6 and 1.9 EFI, RS 1600 Turbo, XR3, Fiesta XR2 Series 2, and find out what makes them crap themselves. The engines are very similar in valve actuation, and a lot of work cross-cerdits.
 
they might have been used to develop the ohc but the pinto is a completely different ensemble.... true the ohc does seem as the next logical step.

just some diferences\:
chain drive vs belt drve
completely different rocker setup ohc mounted on a shaft, pinto is plain crap

roller cam setup. hydrolics and completely diferent rocker desing

a 60thou longer valve or a shim shoulden make much difference as wade cams takes into consideration the rocker ratio

im just after hardware advise>
 
the crow cam gear will let you advance or retard youre cam... in very minute steps, its called a vernier gear, top stuff
 
cool i know what it is and benefits. but how much will it gain?? What valves do i use?
 
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