What to expect from the cc503...
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Joined: Aug 2010
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From: Tennessee
What to expect from the cc503... Ive just installed the cc503 cam its already in the block and ready to go just waiting to get the stall in and get a tune. I was wondering what kind of horsepower to expect from the cam? I have an A4 350 lt1, ported heads, bbk shorties, magnaflow catback, direct flow magnaflow cats, K&N CAI, Spectre intake elbow, bbk58 mm TB, edelbrock lt1 intake, cc503, 1.6 rr's, cc pushrods, 30 lbs injectors, new fuel pump, richmond 3.73's, and a rebuilt transmission. I was also wondering what size stall i would need? Thanks guys!
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Joined: Jun 2007
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From: centerville, ohio
I would expect 370-380 rwhp from the heads and cam. You're exhaust may hinder performance somewhat. Some longtubes thru an x is hard to beat. For the stall, the Yank SS 3600 is highly recommended with a good trans cooler.
"ported heads" could be anything from a power LOSS to a huge gain. Without knowing a history on the results of that porter nobody can make an intelligent guess.
The Edebrock intake was a VERY poor decision.
You did not mention tuning, you drive the engine with that many mods and the larger injectors and you will do damage without computer reprogramming for all this.
The TB will cause a short tranny life without reprogramming for it too.
Hope you made a better choice on the tranny then the engine, far MORE shops completely screwup this tranny than build it well, MOST will give you something back at less than stock quality.
I hope I am wrong about all this and your results are stunning BUT, been at this awhile and know my way around the LT1 pretty well.
Next time ask questions before making mistakes.
The Edebrock intake was a VERY poor decision.
You did not mention tuning, you drive the engine with that many mods and the larger injectors and you will do damage without computer reprogramming for all this.
The TB will cause a short tranny life without reprogramming for it too.
Hope you made a better choice on the tranny then the engine, far MORE shops completely screwup this tranny than build it well, MOST will give you something back at less than stock quality.
I hope I am wrong about all this and your results are stunning BUT, been at this awhile and know my way around the LT1 pretty well.
Next time ask questions before making mistakes.
I've had that cam and went bigger, specs in sig...I had the same heads as I had with that cam. Depending on Tune, injs with an auto whp will be lower. I'll say realistic number is 350s. Still a nice number for a LT1. With LTs, elec WP, V spings etc...hp would be higher. The 503 is a nice small cam.
as far as the cam, they are good cams. with your heads, if properly ported, you couldve gone with gm847 or cc306 cam though. the 503 should treat you well and has a little better street manners then the 306. Personally i hold the 503 high in my book.
as far as what the other guy said, im not sure if the edelbrock lt1 intake is considered a bad mod more then a waste of money.
anyways, only one way to find answers. get a stall. id say the yank 3600 as well, if not the yank then probably a 3000 atleast but the yanks are known for quality and proven performance. but yeah get the stall, then go get it tuned and dyno'd.
Personally i think your mod list is ok apart from the headers. the mods are allowing the engine to breath better. I think money couldve been spent wiser, but im not going to rip your mod list apart and try to bring you down. Live and learn is all you can do.
good luck, im sure youll love the cam.
as far as what the other guy said, im not sure if the edelbrock lt1 intake is considered a bad mod more then a waste of money.
anyways, only one way to find answers. get a stall. id say the yank 3600 as well, if not the yank then probably a 3000 atleast but the yanks are known for quality and proven performance. but yeah get the stall, then go get it tuned and dyno'd.
Personally i think your mod list is ok apart from the headers. the mods are allowing the engine to breath better. I think money couldve been spent wiser, but im not going to rip your mod list apart and try to bring you down. Live and learn is all you can do.
good luck, im sure youll love the cam.
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Thread Starter
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Joined: Aug 2010
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From: Tennessee
I do have the comp cam 918 beehive springs. And i got the shorties cause of emissions. Could i hook a set of longtubes up to the magnaflow cats? The port job on the heads was done right..they were done by a guy who was a certified GM mechanic for 15 years and for the last 10 years he's ran a very popular machine shop in tennessee, now builds race engines so the work on the heads i know for a fact are going to be a gain. Would it be worth it to tear the car back down and swap to a gm847 or cc306?
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26918 springs, ok... not too worried about valve float from 6000 to 6600. My heads are about as good as it gets when done by hand by someone with over 35 years of experience. I put down 377, but that's above average, and the heads are 100% the reason. Stock or poorly ported heads you're looking around 330-335 through an M6, done well around 355-360 through an M6. What it'll do through an auto all depends, per what was said above. Best of luck with the final results- at the track.
I dunno roadtrip did ~330rwhp with just bolt ons back in the day on a factory bottom end. Ported heads and cc503 only makes 47hp on rebuilt shortblock? My friend put down 359rwhp cam only on stock heads, stock bottom end, and stock rockers. altjar made like 371rwhp with a gm847 cam only about 5 years ago. For some reason ltx owners like to set the bar low 
not saying dyno numbers are everything, but it's an indicator of how well your car is performing. to the OP... I'd get something in the 3600 range. edge is local to me and makes a great converter for a great price, ask capricemgr how he likes his.
not saying dyno numbers are everything, but it's an indicator of how well your car is performing. to the OP... I'd get something in the 3600 range. edge is local to me and makes a great converter for a great price, ask capricemgr how he likes his.
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From: In the garage fixing LT1
The popularity of the 503 isn't just about HP. It is a cam that gives you great power right across the curve. It is more aggressive down low than the older style 306 and 847 that have to be revved way higher. If I was going to a bigger cam I wouldn't bother with the old 306 and go straight to an XFI grind because of the modern aggressive ramp rates. I bought a Yank 3200 for my 503 equipped LT1 because I plan on a lot of street driving with it. Here is an LT1 cam comparison on a stock block that I always found interesting.
Thread Starter
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Joined: Aug 2010
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From: Tennessee
So would it be worth the time and money to tear the car back down and go with one of the other cams? Ive only drove the car once and that was from the shop to my garage it has been sitting in my garge undriven for 3 weeks because i dont want to get a tune yet until im sure about the cam.
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Joined: Jun 2007
Posts: 1,255
Likes: 11
From: centerville, ohio
So would it be worth the time and money to tear the car back down and go with one of the other cams? Ive only drove the car once and that was from the shop to my garage it has been sitting in my garge undriven for 3 weeks because i dont want to get a tune yet until im sure about the cam.
TECH Enthusiast
Joined: Jun 2002
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From: In the garage fixing LT1
So would it be worth the time and money to tear the car back down and go with one of the other cams? Ive only drove the car once and that was from the shop to my garage it has been sitting in my garge undriven for 3 weeks because i dont want to get a tune yet until im sure about the cam.
What are you using the car for? 503 is a great cam that is popular in daily driven LT1s. It would be easy for people here to tell you to go with an XFI468 and get 450+hp at 2200-6200rpms (more like 2500-6500rpms) but you lose practicality. I would keep the cam, tune up and change to long tubes.
26918 springs, ok... not too worried about valve float from 6000 to 6600. My heads are about as good as it gets when done by hand by someone with over 35 years of experience. I put down 377, but that's above average, and the heads are 100% the reason. Stock or poorly ported heads you're looking around 330-335 through an M6, done well around 355-360 through an M6. What it'll do through an auto all depends, per what was said above. Best of luck with the final results- at the track.
To the original poster, IMO that cam is one of your decent decisions lots of other stuff I would change first.
Far as the stall I do really like Edge Racing converters 3600 is probably in the ballpark for stall.
I had a pair of heads a long time ago done by a guy for my BB chevy they looked KILLER no joke there! Back then the ol BB ran 11.6 on stock heads (049 castings) fortunately, i had a spare set of these heads.... Well this "killer port job" i rushed back to my shop to yank my old heads long story short i installed the KILLER heads and my BB slowed down to 11.90-12.00
WTF!!!!
So i had my original 049s ported by a well known shop in H-Town, a week later went back to the track HRP almost hit 10s were talkin 11.1 many passes.
Moral to the story is just cause the heads look awesome does not mean they flow for crap as proved....experienced hands and flow bench work
WTF!!!!So i had my original 049s ported by a well known shop in H-Town, a week later went back to the track HRP almost hit 10s were talkin 11.1 many passes.
Moral to the story is just cause the heads look awesome does not mean they flow for crap as proved....experienced hands and flow bench work
Thread Starter
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From: Tennessee
The car will not be drivin everyday and probably not much at the track im just shooting for something to ride around town in and kick some ***. I guess ill go head and put the stall in and get the tune see how it turns out and go from there. At the time when i bought the cam i wasnt sure if i was going to touch the heads, but right before the car was being put back together i made a last second decision and took and had them done. Now i feel like im leavin out a lot of power by using this cam.
Im going to look into to a set of longtubes and maybe a different exhaust i want something a little louder than the magnaflow..any opinions? And will i be able to pass emissions with longtubes? Thanks for all the help
Im going to look into to a set of longtubes and maybe a different exhaust i want something a little louder than the magnaflow..any opinions? And will i be able to pass emissions with longtubes? Thanks for all the help
i wouldnt second guess on the cam.
i think with heads, cam, stroke, and exhaust its all about personal preference. what i mean about that is its all about what you want out of the car. alot of guys on here like to go all out and pull as much out of the motor as they can and willing to sacrifice other aspects and there is nothing wrong with that but for other its about finding a mix of performance and other attributes.
i think with heads, cam, stroke, and exhaust its all about personal preference. what i mean about that is its all about what you want out of the car. alot of guys on here like to go all out and pull as much out of the motor as they can and willing to sacrifice other aspects and there is nothing wrong with that but for other its about finding a mix of performance and other attributes.
