To celebrate the fact that I no longer have to endure the annual smog test here in AZ I want to install a better cam than what I currently run.

My setup is: 454, Edelbrock heads, Speed Pro 2399 forged pistons at 0.00 deck, 10.0:1 CR, .010/.010 cast crank, ARP rod bolts, RPM intake, 850 Annular carb, TKO600 and 3.55 w/posi. My Crane hyd cam is 296/306 adv and 236/246 @ .050, 114 lsa.

I am looking for more power across the board 2500-6500 rpm.
I want a solid flat tappet cam now that I run a 5 speed. I know that the 402A7 is a popular grind. Vac is not a problem but if anyone has an idle vac reading let me know.

Thanks!

OMG, you dont need a sound bite, just listen to " Hot for Teacher "!

I run the smaller A3 and, well, I've lost the sleeper sound of my old Crane solid! The new cam will give you maybe 1000 rpm "headroom" over your hydraulic. Pelase be advised that SOME annullar carbs go lean at high flow.

he's got an 850 on a street 454, he's not going to pushing the carb out towards it's limits.

Bill, what part of town are you in? I'm up near 59th Ave and the 101.

What's the lift on your current cam?

Bill, here's an old post from UDHarold for you:

Hydraulics---Either the 302A8LUN, my old 288/296H10, 231/239 at .050, .550"/.575" valve lift, 110 LSA, or the new VooDoo 276, 276/284 at the seat, 233/241 at .050, .554"/.572" valve lift, also 110 LSA. Both are very good, with similar power ranges.


Solids---I have 4, with different power bands.
402A3LUN--276/284--243/251--.586"/.600"--110 LSA
402A5LUN--285/295--252/261--.595"/.595"--110 LSA
402A7LUN--288/296--255/263--.612"/.630"--110 LSA
402A8LUN--292/301--259/267--.625"/.625"--110 LSA
The last 3 all need a 3000 to 3500 SS, and stiffer and stiffer rear gears.
Use a 3.7 for the 402A3 with 2500-2800 SS.
Use a 3.9 for the 402A5 with 3000 SS.
Use a 4.11 for the 402A7 with a 3000-3500 SS.
Use a 4.30-4.56 for the 402A8 with a 3500-4000 SS.

I'd be looking at the 402A3LUN if I were you. It's a full 10* step up from where you are but it also is on a 110 LSA, which is much tighter than the 114* you have. Just your present cam ground on a 110 would be much more aggressive sounding. Notice that your 3.55 is a touch high for A3 or A5, not close to what he recommends for a A7, unless you have a lighter weight car like an early Camaro.

Be needing to double-check your valve springs to.

he's got an 850 on a street 454, he's not going to pushing the carb out towards it's limits.

Bill, what part of town are you in? I'm up near 59th Ave and the 101.

What's the lift on your current cam?

Tom,
I'm north of Cave Creek and 101. I always make it to the swap meet at Phoenix college. Any other events/shows out that way?

Regarding the gearing, the TKO has a 2.87 first gear. I would think that Harold was using a Muncie first gear when making his recommendation. Do I have a liitle more room here because of that?

Gene, my understanding was the opposite, carb may get rich at top end because of the bosster design.

OK, let's figure that I have pretty much the same motor (GMPP/EDE heads, AirGap, 870 carb), but with about 10CC more piston. I run a 233/236, .600/.610 112LSA 108ICL hyd roller. Idles at about 900 for a clean idle. It will idle lower and get more rumpety, but I like the faster clean-yet-lopey idle quality. Power is nothing short of phenominal from idle to 6000 (well at least 3000, that's where my stall speed is). JMHO, these heads flow somewhere around 72% E/I. You do not need as large of a spread for power. Also, they do respond to a tighter LSA. I run a 3* split and have incredible throttle response. You could even run a single pattern cam in the 240/240 range, have plenty of mid range punch and still have power to 6000+. Oh, and these heads do like lift.

Bill,

I've been working every Saturday for the last 7 years so I've pretty much lost track of the usual weekend stuff. However, in a couple weeks I may have a schedule change that will put me with weekends off, so I might be able to get back in the swing of things a little.

yeah, 2.87 x 3.55 = 10.18. divide this by 2.20 and you get a 4.63, so your setup would be like having a 2.20 Muncie with a 4.56, more or less. In first gear anyway.

I'm still a little concerned that you're getting into an area with over 250 at 050 with 110 lobe center, you might be a little surprised at how aggressive that is. Sort of a whole different different car than a 236 with 114. note the difference in the spread between the advertised and 050 numbers in the two cams. The LUN is a much more aggressive profile. Have you got a good fuel pressure gauge you can see while driving?

I wouldn't worry about the carb deal. a 454 at 6500 at 90% V.E. uses about 750, not that close. Most Holleys go rich when pushed towards max flow, but if it has AD boosters all bets are off. The only AD carbs I've worked with are alcohol, and that's a different ballpark.

This is one that UDHarold told me he now has. 255/263 at .050, .626"/.626" valve lift, and either 110 or 112 LSA. They are a lot better than my old UltraDyne solids, and those were pretty good.
And my set up will be about the same as what you have. Give Harold a shout for more info. :)

255 is pretty aggressive for anything referred to as a street car. Shake, is your engine built and running? got any figures on idle RPM and vacuum at that RPM?

Sorry Tom not as of yet. But it is what UDHarold said would be a great cam. And well he is THE MAN . :) But I will have to wait and see.

I was getting ready to order the cam from Harold pretty soon.

Specs. 468CI, Chevy Oval port heads. With some port work along with 2.19In 1.88exh,10 to 1 comp,Vic Jr Intake,Holley 850DP.

As far as Tranny I am still up in the air lol. I will either go with the Turbo 400 and a 3000 Stahl or a Ford T5 World class 5 speed back to 3.73 gears.

Sorry not a Chevelle but a 73 Corvette.