Acceptable lobe variation?

chris wilson said:
That is Funny! No not a chance no worries. I have realized a great deal from reading posts around the internet and the hours of reading that Grumpy has provided to me that just does not end! Just as i think i am through it the next page has 20 more links that each has 20 more links. Thankfully some actually double up on past readings. So i have grown an 18 inch beard sifting through it all.

It appears that one can buy these kits at $500.00 cam and lifters. (obviously garbage) kits $800.00 that have springs, retainers camshaft , pushrods ,lifters. keepers, timing chain, (more garbage)
and than $1500.00 that give you lifters and cam that will actually handle over 7000 rpm, but you still need springs, retainers, keepers, pushrods, stud girdle, and odds and ends.

The lower end kits with the $350.00-550.00 lifters seem to be were the majority of the problems stem from unfortunately. It is also the most profitable for vendors and the most affordable for the general public. This roller stuff done right may be worth visiting but from a performance stand point you have to put some serious coin into it to do it right or not do it at all.

I am starting to believe that one is better off to go Solid Roller than invest in these mediocre hyd roller kits that limit performance and appear to be great for puttering around but that is it. The durability is indeed questionable unless you keep things below 5500rpm. Not really what i have in mind from a performance standpoint.
Click to expand...

More expensive to do it right going down that road now I lucked out and found my lifters at about half price from an abandoned project. Other wise they would have been around $1100. I am only aiming to spin up 7300 cause I want to keep some low end also. I am also not building a drag engine. I need my engine to run on the street and in a road race environment. Waste of time going solid roller with those heads!!! They fall on there face after .600 and there is not enough room to port them into miracles. So you want a cam as close to .600 lift as possible if your next problem that needs to be addressed is the spring pockets unless you want to run a nascar set of springs that cost close to $1000. Again solid roller not helping but hydraulic roller springs come on those heads unless you changed them. And even if so can be had cheap. You can run an aggressive hydraulic roller that will work with your set up for much more reasonable price. Ask how I know been down this road. The port on the 195 head becomes restrictive at higher RPMs.

Here is set of great hydraulic roller lifters for a reasonable price recommended to me by Mike Jones of Jones Cams he also gave me a cam recommendation this was when I still had the AFR 195s R75365-110 244/244 @.050 .365"/.365" 110 LSA, Steel Billet, w/iron gear $441.64 recommender to use 1.6:1 rockers stated would work with the AFR PAC springs that came on my heads. Those Morel lifters are the same as Howards and a few other cam companies they supply allot of cam companies with lifters. That is an aggressive hydraulic that will spin to 7000 losing only about 10hp to a solid roller. Your heads are your limiting factor in this case but you are still talking around 550hp here said and done.
http://www.buydart.com/morel-sbc-vert-tie-bar-hyd-roller-p-16192.html
 
Thank you john , Yes i saw your post over at speed talk. I was going to drop Mike a line re springs and one of his cams but you saved me bugging him! Which lifters did you actually purchase for your project? My main concern is the durability of the lifter and i would be very pleased to have a lifter that could actually handle 7000-7200. I agree the spring pockets are the biggest pain for these heads. The heads have been fully ported and yes they still run out of breathing room as was mentioned! Grumpy, once i can get away from all all the internet links you have provided i will go down the rabbit hole! I have a library but i might have missed 0ne or two of those books! :0 Thank you all for the guidance.
 
I ended up with a different route then my original plan I sold my AFR heads and ordered a new set from Tony Mamo along with my cam. He was one of the main guys that redeveloped the AFR line into what it is today. But I went solid lifter and have the ISKY red zone bushing lifters (hit the lotto on ebay on an abandoned project) in a hydraulic lifter I would go with the ones I posted for you. Solid lifters face a whole different set of problems to a hydraulic roller as explained spring pressures and hammering seem to big things. It also starts creating geometry issues along with flex issues. I would still contact Mike if I was you explain as much as possible to him what you want. The more info you give him the better you will be. I am building for a street Road Race application and my set up would not be ideal in a drag race setup if that is what your building for. My car will also face regular maintenance and a lifter rebuild and inspection schedule. So if you do not want to be pulling the intake at minimal once a year and inspecting the valve train the solid roller is not the best choice for you. Plus with those heads I would have chose the hydraulic just for that reason. 10hp would not have been worth it to justify the maintenance that comes with it.

Here is my build
http://garage.grumpysperformance.com/index.php?threads/my-chevelle-build-and-spot-to-rant.10231/
There is allot info there on my setup and plans including my old setup.
 
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