Just wonder what the biggest solid roller cam you can run on the street AND have enough vacuum for power brakes?
Vitals...
454 BBC
10.25:1 compression
800-850 cfm carb
3600 stall
All in a heavy '72 Chevelle

Almost 300 duration, supercomp cam, .714 lift, 4 lbs. of vacuum, really need an electric assisst.

Something akin to the Comp XR292 I should think. Right around 250@.050 and 110 lsa.

I agree -- 250 @ .050 is about tops and then IMO you need a vac reserve can. I run 248/254* @ .050 on a 108* LSA in mt 383 and its borderline, should be better in a 454.

Check with Lunati on availability of the new VooDoo solid rollers.
they should have:
231/237 at .050, .629"/.641" valve lift
237/243 at .050, .641"/.655" valve lift,
243/249 at .050, .655"/.664" valve lift.

They should have 2 larger ones also, but no vacuum for them.....

The 243/249 had 565 ftlbs of torque at 2500 in our 9.8:1 ZZ502 with 310 Canfields.

UDHarold

If you play with the combo you will be suprised at how much cam you can use. I had no problems with the ZL-1 in a 454 with a manual trans but I used over 20 degs initial and used a vacuum dist hooked to manifold vacuum.

In my 496 I'm using a Comp. Solid Roller with 252/256 @ .050 and .714 lift on 112LSA and can only muster about 7lbs of vacuum. I run a reserve can but, the brakes are still not where I want them!

I've got a 255/264@.050, 110 LSA in my 491. I've only driven it 3 times now, but the power brakes worked fine so far. It does have EFI with timing control, but similar results should be possible with a carb with good tuning. RUnning a lot of timing helps a lot (25+)

Check with Lunati on availability of the new VooDoo solid rollers.
they should have:
231/237 at .050, .629"/.641" valve lift
237/243 at .050, .641"/.655" valve lift,
243/249 at .050, .655"/.664" valve lift.

They should have 2 larger ones also, but no vacuum for them.....

The 243/249 had 565 ftlbs of torque at 2500 in our 9.8:1 ZZ502 with 310 Canfields.

UDHarold

Harold,
I have absolutely no doubt that your designs do everything you say they will...and maybe even more. But, I really have a problem buying from Lunati after the way they showed you the door. You see, I had something similiar happen to me only a few months ago. I just don't think its right to support a company who uses people to pad their wallets and then tosses them out without so much as a thought. I know this thinking may seem dated and simplistic but, I (unlike Lunati) do still have some loyalty and regard for what is decent and right.
I'm not bashing their products. I know that with your new designs in hand, they're products have probably never been better. But, I think I'll just spend my money elsewhere. Thanks.

I don't have power brakes on my car so I can't tell you how my cam works with them but, with my setup I'm running a .030" over 454, with 10.0cr, an Isky mechanical roller, 290/290 @ .020", 248/252 @ .050", .638"/.646" lift, 110 LSA.

At idle (950 rpm), I'm pulling 10-10.5 inHg.

Harold,
I have absolutely no doubt that your designs do everything you say they will...and maybe even more. But, I really have a problem buying from Lunati after the way they showed you the door. You see, I had something similiar happen to me only a few months ago. I just don't think its right to support a company who uses people to pad their wallets and then tosses them out without so much as a thought. I know this thinking may seem dated and simplistic but, I (unlike Lunati) do still have some loyalty and regard for what is decent and right.
I'm not bashing their products. I know that with your new designs in hand, they're products have probably never been better. But, I think I'll just spend my money elsewhere. Thanks.

Thats life in the big city Justin, nothing you or I can do about it. I think you'll have a hard time NOT buying from Holley once you find out who/what all they own. Some day when you're rich and famous, and have your own speed shop, you may hire some kid that shows you an easier/better way to do something, then maybe you'll think about it before you show him the door,then maybe not, you may take the idea for yourself and call it yours, ya never know.

I ran a CC XR-286 in my last 454 combo (10.37:1 pump gas). Edelbrock Performer RPM and HP-950. The cam was .660 and 254/260@.050. IIRC it had ~9-10" of vacuum at idle (900 RPM). I also run a Crane vacuum cannister. Worked great street driving as well as slowing it from 126-127 at the end of the 1/4 mile. IMO this is a great cam for a street/strip application. I only ran about ~180lbs of seat pressure and it would rev to 6,800 without any signs of valve float.

hth...

Thanks Ken, sounds like that cam is close to the one I had in mind. I think I'll try it. The cam I'm considering calls for 200lbs of seat pressure and 550-600lbs open(depending on install height). Specs are 248/254 duration with .645/.659 net lift on a 110 LSA. My concern now is getting closer to the suggested 11:1 compression(they actually told me 10.5 would work) for the cam. I have TRW 2349 pistons and 119cc #049 heads so, I'm sitting at 10:1 right now so, its looking like I'll have to manupulate deck height and chamber volume.
They (Competition Products) also suggested I run a single plane with this cam. I'm alittle hesitant about that. Think I'll try my Air Gap first.

Edit: started new thread

For SilverSS454

I don't know the background on this but if I am reading this correctly it sounds like Harold and Lunati parted company. As someone who recently felt the sting of an unfair / unethical dismissal I know where you are coming from. After something like this happens lyou just want to retailate in anyway possible. All you really can do is hope that the person / persons responsible for things like what I think I am reading about here get to pay their dues in the future. Harold tried to do his job by going above and beyond the call here on the forum. He worked to promote his employers products by answering both public and private inquiries...if that is any indication of his work "at the office" I think something rotten must have happened.

Companies are huge amorphous blobs something the size of Holley has no conscience (good or bad), no uniform corporate ehtic (good or bad) they simply are balance sheet / revenue statement producing entities. It is usually one or two A-Holes inside the company that cause a bad situation to happen to another individual. It all comes back to personalities, petty turf wars and what not.

Loyalty is unfortunately an outdated concept when it comes to employers. If companies use workers to line their pockets only to dispose of the workers later then he companies deserve no loyalty from anyone, employee or customer. Managements have created this "disposeable worker" no benefits or endlessly decreasing benefits, endlessly increasing expectation workplace. The real retailaition has to come as SilverS454 says. NO CUSTOMER LOYALTY. NO EMPLOYEE LOYALTY. Treat them (the companies) just the way they treat their people and just the way they treat their customers. If they are hire and fire oriented HAVE NO GUILT / NO REMORSE when you say "Got a better deal across the street I am quitting today" or if they want to sell cheap higher profit foreign made junk then don't buy it.

What goes around comes around and it is up to all employees and customers to help make it go around as fast as it can. Pass it right back to the bastards in the fancy offices that don't know how to DO anything themselves except count the money and bitch that people are not workin hard enough.

Thanks Ken, sounds like that cam is close to the one I had in mind. I think I'll try it. The cam I'm considering calls for 200lbs of seat pressure and 550-600lbs open(depending on install height). Specs are 248/254 duration with .645/.659 net lift on a 110 LSA. My concern now is getting closer to the suggested 11:1 compression(they actually told me 10.5 would work) for the cam. I have TRW 2349 pistons and 119cc #049 heads so, I'm sitting at 10:1 right now so, its looking like I'll have to manupulate deck height and chamber volume.
They (Competition Products) also suggested I run a single plane with this cam. I'm alittle hesitant about that. Think I'll try my Air Gap first.
I don't know the specifics of your combo, but I'm not sure I would run that wide an LSA (assuming this is a 454 or smaller engine). Mine was on a 108. It made great power/torque and propelled my 3,760lbs (at the time) car to a best of 10.53@127.11. With a cam this size I would stick with the dual plane. I tried a Vic Jr. on that same combo and it was a dog (killed .3 in ET and MPH was a wash, 60' times suffered horribly). As I mentioned, you can get away with 175 on the seat, but you better keep a close check on the springs. I had one break after about ~240 passes. 200 on the seat would probably be better. Don't sweat the compression requirement. A cam that size will build great cylinder pressure. I run Canfield heads that have a little bigger runner than the 049s, but were also a 119cc chamber. I see no reason why the engine you're building wouldn't make the same or possibly more power with the parts you've described.

Good luck.

Ken, you're right it is a 454 and I will definately be running the Air Gap. I haven't had the chance to run one yet and I want to see how it acts with this cam. I've had my eye on this cam for sometime and really want to try it. Although it looks like I will need to run a vacuum canister to supplement the power brakes, I think I can get away with this setup on the street. The #049's have had some work done and may have a bit more (on the exhaust side) before they finally get bolted on. I will definately be going with big valves and my engine guy simply won't do anything but a 5 angle valve job so, that should be a benefit. I also hear what you are saying about spring pressures and that has been a concern, especially on the street. I may ask more questions about springs and setup as time draws closer to assemble the heads. Thanks.