Cc306 vs cc503
Launching!
Joined: Feb 2009
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From: bodymore
CCA-07-306 --- 230@ .510/ 244@ .540 (1.5RR)--- 112 LSA --- 1800-5800
CCA-07-503 --- 224@ .503/ 230@ .510 (1.5RR)--- 112 LSA --- 1800-5800
306 has more lift, more duration, so bigger. more power. though the sweet spot you should spin it to is probably bigger, 5800 is what Comp Cams recommends but big ones like 306 like going out to 6300-6400ish IIRC.
Check the sticky at the top of the forum, good info in there.
CCA-07-503 --- 224@ .503/ 230@ .510 (1.5RR)--- 112 LSA --- 1800-5800
306 has more lift, more duration, so bigger. more power. though the sweet spot you should spin it to is probably bigger, 5800 is what Comp Cams recommends but big ones like 306 like going out to 6300-6400ish IIRC.
Check the sticky at the top of the forum, good info in there.
Last edited by trippinholyman; Jul 16, 2009 at 01:02 PM.
SO THE 306 WILL HAVE A NICE LOPEY SOUND... AND I CAN RUN MY BEHIVES, 1.6 ROCKERS, AND STOCK LIFTERS...
HMMM... I HAD MY HEART SET ON THE cc503 BUT THERE IS ONE ON EBAY FOR CHEEEEEEP
HMMM... I HAD MY HEART SET ON THE cc503 BUT THERE IS ONE ON EBAY FOR CHEEEEEEP
Stock heads, stock bottom end?
If yes, CC503 hands down.
If portwork will be/has been done on the heads and ARP rod bolts installed, CC306 would be the way to go.
The CC503 is widely known as the largest cam that will work effectively with stock heads. It has a nice lope to it. You'll have a nice meaty power band that pulls to ~6300-6500 rpm with no loss of low end torque.
The CC306 has more potential if you have a bottom end and heads that can properly support it. It will sound nastier too. You have to spin higher to make the most out of a CC306, somewhere in the neighborhood of 6800 rpm (not the best idea for a stock bottom end). Not to mention that you'll sacrifice a little low end torque to gain top end power.
Now if you have a stout 355 w/ ARP rod bolts, CC306, and some ported stock heads...it will be a nice performer.
I went throught the same decision when I wanted to cam my car. Went with the CC503 and I couldn't be happier.
If yes, CC503 hands down.
If portwork will be/has been done on the heads and ARP rod bolts installed, CC306 would be the way to go.
The CC503 is widely known as the largest cam that will work effectively with stock heads. It has a nice lope to it. You'll have a nice meaty power band that pulls to ~6300-6500 rpm with no loss of low end torque.
The CC306 has more potential if you have a bottom end and heads that can properly support it. It will sound nastier too. You have to spin higher to make the most out of a CC306, somewhere in the neighborhood of 6800 rpm (not the best idea for a stock bottom end). Not to mention that you'll sacrifice a little low end torque to gain top end power.
Now if you have a stout 355 w/ ARP rod bolts, CC306, and some ported stock heads...it will be a nice performer.
I went throught the same decision when I wanted to cam my car. Went with the CC503 and I couldn't be happier.
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How much for that 847?
The 503 is a good cam, I know a guy in an Impala who ran 12.50s with one. But if you ever want to upgrade your heads whether it be porting or aftermarket, you'll want to switch to a 306 or 847 later on. Do you have any other upgrades? (long tubes, stall, cold air)
The 503 is a good cam, I know a guy in an Impala who ran 12.50s with one. But if you ever want to upgrade your heads whether it be porting or aftermarket, you'll want to switch to a 306 or 847 later on. Do you have any other upgrades? (long tubes, stall, cold air)
How much for that 847?
The 503 is a good cam, I know a guy in an Impala who ran 12.50s with one. But if you ever want to upgrade your heads whether it be porting or aftermarket, you'll want to switch to a 306 or 847 later on. Do you have any other upgrades? (long tubes, stall, cold air)
The 503 is a good cam, I know a guy in an Impala who ran 12.50s with one. But if you ever want to upgrade your heads whether it be porting or aftermarket, you'll want to switch to a 306 or 847 later on. Do you have any other upgrades? (long tubes, stall, cold air)
Don't pick a cam based on sound, with the stock heads, the 503 works great. People have ran the CC306 in stock short block cars for years. With heads, the 306 cam was one of the first people were using to break 400RWHP.
with stock heads the cc306 will peak around 6100rpm as where the cc503 peaks around 6500rpm. the cc306 is more designed for a vehicle with ported heads, whereas the cc503 is optimal with the stockers.
the cc503 will probably make a couple less peak hp than the cc503 but have better low end, require less gear/convertor to effectively use, better manners, and better gas mileage.
both are good cams and will be a good upgrade, personally though I'd say get a custom cam from AI or LE unless you're getting a good deal
the cc503 will probably make a couple less peak hp than the cc503 but have better low end, require less gear/convertor to effectively use, better manners, and better gas mileage.
both are good cams and will be a good upgrade, personally though I'd say get a custom cam from AI or LE unless you're getting a good deal
12 Second Club
Joined: Feb 2006
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From: Catlettsburg, Ky
with stock heads the cc306 will peak around 6100rpm as where the cc503 peaks around 6500rpm. the cc306 is more designed for a vehicle with ported heads, whereas the cc503 is optimal with the stockers.
the cc503 will probably make a couple less peak hp than the cc503 but have better low end, require less gear/convertor to effectively use, better manners, and better gas mileage.
both are good cams and will be a good upgrade, personally though I'd say get a custom cam from AI or LE unless you're getting a good deal
the cc503 will probably make a couple less peak hp than the cc503 but have better low end, require less gear/convertor to effectively use, better manners, and better gas mileage.
both are good cams and will be a good upgrade, personally though I'd say get a custom cam from AI or LE unless you're getting a good deal
my 503 car peaks at 5700, and is DONE FOR by 6300. twisting it any higher just results in more wasted gas, and a slower time at the track.
a 306 has a more "peaky" power band, and the 503 has a much broader power band, albeit, a hair lower.
if you've got an auto and/or stock heads, I'd go with a 503. heads/6spd: 306 and a 4.10 gear.
I'm gonna see how far I can push my 503 on a stock 103k shortblock. really in search of some 11.5x runs with the converter and a set of tires. next mod: 11.8:1 shortblock.
Teching In
Joined: Dec 2008
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welll im useing a 503 with afr heads and a 355 it didnt stop making power any untill i redlined on a mustang dyno 444 rwp. i dont know why but the guy who built my motor seemed to like the 503 and i have 0 complaints. hes an engineer for nasa aswell so ill listen to him
On The Tree
Joined: Sep 2008
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I think you've got a few things ***-backwards there.
my 503 car peaks at 5700, and is DONE FOR by 6300. twisting it any higher just results in more wasted gas, and a slower time at the track.
a 306 has a more "peaky" power band, and the 503 has a much broader power band, albeit, a hair lower.
if you've got an auto and/or stock heads, I'd go with a 503. heads/6spd: 306 and a 4.10 gear.
I'm gonna see how far I can push my 503 on a stock 103k shortblock. really in search of some 11.5x runs with the converter and a set of tires. next mod: 11.8:1 shortblock.
my 503 car peaks at 5700, and is DONE FOR by 6300. twisting it any higher just results in more wasted gas, and a slower time at the track.
a 306 has a more "peaky" power band, and the 503 has a much broader power band, albeit, a hair lower.
if you've got an auto and/or stock heads, I'd go with a 503. heads/6spd: 306 and a 4.10 gear.
I'm gonna see how far I can push my 503 on a stock 103k shortblock. really in search of some 11.5x runs with the converter and a set of tires. next mod: 11.8:1 shortblock.
I have run both of these cams, the cc503 was first on my stock heads and bottom end. It was a great cam and had great DD manners, saw 330rwhp out of it with a mail order tune and midlength headers. Cam pulled great all the way from 2000 all the way to 5700rpm. I then stepped up to LE2 heads and the cc306 with some LT's. Noticed the cc306 started really pulling hard from 3000rpm through redline to 6400rpm. Dynoed at 383rwhp with the combo. Ran a mail order tune on the cc306 combo and did notice some surging between 2000 and 2500rpm whereas the cc503 I had no surging at all.
The cc503 is definately a good choice. I would probably get new replacement comp cams lifters, the cc503 is an XE grind(extreme energy grind) and putting in used/high mileage lifters can mean trouble. I was running CC 986 springs aswell.
Im running the 306 on stock heads now and its doing a fair job. Will need head work for this cam though. Ive got major surge down low but MASSIVE mid to top end range. I busted a 12.97 last time out in TEXAS HEAT wM6 and shifting only at 5700 so it is a good cam. But if u never plan on doing heads than go with something else. Ill be do heads eventually so I went with the 306
jmo
sean
jmo
sean
