xrwagon":2j9cxps5 said:Tighe cams are the only ones that sell semi finished crossflow rollers, i know of a couple of guys using them, i know one guy i talk to had a few problems with Tighe but the camshafts are good, he had either clive or Wade finish the cam. Camtech did the final machining of his cam, he is running Comp Cams solid roller lifters, can give more info if needed, his last solid cammed crossflow had a in his words below
xctasy":2j9cxps5 said:It's no problem getting a roller rocker cam in any form, X-flow or non cross flow.
I'd strongly suggest you look at the ones that can be gotten through Kelford. Mine are suitable for turbo, and are really a K code/E303 cheeter cam. It's a specific grind to pass emissions, as unlike 5.0's, you can't prove a post 1975 3.3 or 4.1 in an X shell, Bronco, F100 or Fox will pass any Aussie or US or US California 1975 to 1983 standard emission test. Enough work has been done, and the EO and CARB requirements can be applied to make the 5.0 eclipse a 3.3 or 4.1. But a 3.3 or 4.1 can with ease out decimate the 350 to 500 horsepower potential of a 5.0 or 347 if a turbo orblower is added, but the most draconian states in Australia and the USA make an aluminum headed 3.3 or 4.1 a gross poluter unless its on propane. Its that inequity that made me push for a non cross-flow roller cam with the non cross flow head, in a later 1976 to 1992 X-flow block.
The 291 cam that George C used in his TD x-flow Cortina 250 is the right option for making in roller form for the right turbo.
You'd cover off the cost by talking with Mike at Classic Inlines and having a set kit trialled in your 250. X-flow or log or non cross flow or Classic inlines is a non issue, a roller cam is a device that can put a 250 into the 7500 rpm bracket without breaking the long pushrods or taking out the rocker fallcrums.
The American industry has had roller cams suppied to the USA by Crow cam since 1990 for a certain Texan called JD who trailed one in his econo rail. Lynx Corporation and Crow cams did the work back then, but the inline six market for small 144-250 Ford sixes is a very fickle one, with many wanting to go fast, but few wanting to pay the price. There is no risk of ruining a block if oil pump isn't overloaded and you use an EDIS ignition system and a roller cam. You can lean on it reall hard.
I don't want to add another bump in the road map to sucess, but a roller cam is a self funder, and he who pays will also be able to certify a 250 turbo cross flow for us on any engine.
Thanks gentlemen.....( I think)???
This is what I know:
I know full well the benefit of a solid roller cam w/ regard to making power. It was always a go to in all of the V-8 engines I raced. Like I said, Chet/Doug herbert made the cams, and the lifters could be had for a SBF for around 500.00 for both.
I know that the only set of solid roller lifters now available w/ a removable link bar are the Comp Cams Endure-x line...right around 400.00 for 16.
I know that the great state of Alabama has not seen fit to require ANY car that is registered in this state be certified for emissions,...so being emission compliant isn't a concern....
I know that if I could get one,...I could make it fit.
I know that all of the reasons one typically gets a "solid roller cam" are not the same reasons I want a solid roller cam...(well some of the reasons).
A.I do not intend to spin the engine above 6000 RPM,...more like 5500 will be the real world.
B. Along those same lines, I would actually want the cam profile less aggressive (as opposed to all poppity poppity poppity)
C. Big power has to be content to live w/ it's mother-in-law......."reasonable gas milage".
D. I won't have to worry about getting the engine to start immediately, then run at 2000-2500 RPM for 20-30 minutes.
( Remember......D.I.S,...MSII,....custom MPFI.....all untried,.....all hand built by yours truly,...NOT instilling a buttload of confidence in me that it will do what it needs to from the moment I turn the key)
The things I do not know is who to get it from, or how much the thing will cost. I know it'll cost more,..but money is an object...(otherwise I'd be driving a Ford GT instead of a Ford Fairmont.)
I will contact Kelford and we'll see if they'll respond.....Wade wouldn't even reply to my inquiry, and Martin @ Crow has yet to tell me what he want's me to do to complete the original order for the flat tappet cam I was originally considering...before my paranoia set in.