GM847/cc306 dyno chart?
03-05-2008, 01:04 PM
#1
Registered User
Thread Starter
Join Date: Apr 2007
Location: Az
Posts: 927
GM847/cc306 dyno chart?
I'm looking for a STOCK head GM847 or cc306 dyno graph to look at. I plan on doing a cam swap and eventually do heads. But I don't want to rev extremely high and want to see what I am losing out of by shifting early.
Please don't tell me what NOT to do, I just want to see.
Please don't tell me what NOT to do, I just want to see.
03-05-2008, 05:43 PM
#2
Registered User
Join Date: Jul 2000
Location: Phoenix AZ
Posts: 814
Here ya go Scotto-
CC306, 1.6 rockers, Comp 986 springs
stock rebuild with 11.2:1 compression
Heads are unported, factory castings with SLIGHTLY larger LT4 valves installed in them. Trust me, the compression bump and valves are giving me very little HP if anything with unported heads.
This will be fun...
CC306, 1.6 rockers, Comp 986 springs
stock rebuild with 11.2:1 compression
Heads are unported, factory castings with SLIGHTLY larger LT4 valves installed in them. Trust me, the compression bump and valves are giving me very little HP if anything with unported heads.
This will be fun...
Last edited by fireman; 03-05-2008 at 05:51 PM.
03-06-2008, 06:52 PM
#9
Registered User
Join Date: Aug 2003
Location: Detroit
Posts: 2,926
im not telling you what NOT to do... but before you jump too quickly on the 847/306 bandwagon, i highly suggest you head over to AIs site and check out their grinds. They have some more middle-of-the-road (and by this i DONT mean small) durations that make good power on stock heads. After considering the 847 I decided on going with their 230/238
03-06-2008, 09:56 PM
#11
Registered User
Join Date: Aug 2003
Location: Detroit
Posts: 2,926
here's the data on two of their cams:
http://www.advancedinduction.com/AiProductsCK.html
Ai 226 / 234 - .540/.575 - 110 LSA Primary Operating Range: 2000-6200rpm
This is our largest stock long-block cam for auto cars. Lopey idle, good drivability, and excellent mid-range with peak power at approximately 6200rpm. Properly tuned w/ supporting modifications, M6's typically produce 345-360rwhp SAE corrected.
Ai 230 / 238 - .575/.575 - 110 LSA Primary Operating Range: 2300-6400rpm
This is our largest stock long-block cam for M6 cars. Excellent for rebuilds with 11:1 compression. Lopey idle, good drivability with gears & tuning, and excellent mid-range with peak power at approximately 6300rpm. Properly tuned w/ supporting modifications, M6's typically produce 350-365rwhp SAE corrected.
This is our largest stock long-block cam for auto cars. Lopey idle, good drivability, and excellent mid-range with peak power at approximately 6200rpm. Properly tuned w/ supporting modifications, M6's typically produce 345-360rwhp SAE corrected.
Ai 230 / 238 - .575/.575 - 110 LSA Primary Operating Range: 2300-6400rpm
This is our largest stock long-block cam for M6 cars. Excellent for rebuilds with 11:1 compression. Lopey idle, good drivability with gears & tuning, and excellent mid-range with peak power at approximately 6300rpm. Properly tuned w/ supporting modifications, M6's typically produce 350-365rwhp SAE corrected.
03-07-2008, 06:54 AM
#12
Registered User
Join Date: Nov 1998
Location: Columbia, SC, USA
Posts: 746
When numbers are better than what the majority are used to, they are discounted. If the myth that the cam is too big is prepetuated long enough, then people tend to believe it. Hmm...maybe its a conspiracy so people undercam their cars and keep them slow.
03-07-2008, 09:48 AM
#13
Registered User
Join Date: Mar 2003
Location: palmview, TX (RGV)
Posts: 676
Im not trying to flame you brain, I understand where your coming from. The only thing I can say is everyone should pick a cam based on what they want not what everyone else says. I've heard countless times that the 847/306 are too big for stock heads and people should be hesitant to use them. Sometimes dyno sheets mean jack **** if you cant put the power to the ground. I believe FrankZ's car went low 11's cam-only with the baby crane 227 and til now I havent seen anyone run with him as far as shelf-cams go(I might be wrong, so correct me). What I do love about the 847/306 is that when it comes time to get some ported heads, they will shine and you wont have to swap cams again.
The reason why you cant find any AI dyno #'s is because everyone is still hung up on running cc306, GM847, Hotcam, XE224/230 etc.. becuase they are proven performers like you said. That doesn't mean that they dont work, they are still reletively new grinds and over time they'll start showing up on more cam-only setups.
The reason why you cant find any AI dyno #'s is because everyone is still hung up on running cc306, GM847, Hotcam, XE224/230 etc.. becuase they are proven performers like you said. That doesn't mean that they dont work, they are still reletively new grinds and over time they'll start showing up on more cam-only setups.
03-07-2008, 10:37 AM
#14
Registered User
Join Date: Aug 2003
Location: Detroit
Posts: 2,926
I'm definitely not dissing on AI's products, but I'm curious as to why you believe the negative talkings about the 847. It's a proven cam and makes excellent power, and there are more than a few nearly identical other setups that have been duplicated time and again here. You can see that my dyno peaks well below 6300. AI even say that their cam is excellent for rebuilds with 11:1 compression. Why would you want peak power of 365 RWHP at 6300, when you could have 360 RWHP at 5800 rpms? Show me a cam only LT1 that makes 380 rwhp at 5500, and then I'll show you a cam that everyone should run. I've done NUMEROUS comparisons of cams, and in EVERY case, the 847 has made MORE power from 3000 rpms and up. It even made the SAME power as a custom cam from BRE. I can't even find a cam only dyno sheet from AI's 230/238.
When numbers are better than what the majority are used to, they are discounted. If the myth that the cam is too big is prepetuated long enough, then people tend to believe it. Hmm...maybe its a conspiracy so people undercam their cars and keep them slow.
When numbers are better than what the majority are used to, they are discounted. If the myth that the cam is too big is prepetuated long enough, then people tend to believe it. Hmm...maybe its a conspiracy so people undercam their cars and keep them slow.
I personally think the duration is a little too extreme for what is optimal on an LT1. Sure it might make more power... but i think it demands too much RPM for a lasting combo. If you dont mind revving to the moon, then the 847 is the way to go im not even going to argue that.
Last edited by JoeliusZ28; 03-07-2008 at 10:40 AM.
03-07-2008, 12:31 PM
#15
Registered User
Join Date: Jan 2001
Location: Orlando,Fl
Posts: 2,905
I need to get a set of good heads on my 847 car, lol. 
My 847 car only made 340rwhp @ ~6400 and 322rwtq @ ~ 4750. But I have a nitrous/FI converter so that could account for some power loss, dunno... But it's been to the track once since the converter/tranny and it went 12.4 @ 110, I'm gonna try to go to the track tonight and see if I can get a 12.2 or 12.1 out of it, that would make me happy.
Hopefully I will get around to finishing putting my nitrous kit back on the car soon and see what it does on a small kit.
My 847 car only made 340rwhp @ ~6400 and 322rwtq @ ~ 4750. But I have a nitrous/FI converter so that could account for some power loss, dunno... But it's been to the track once since the converter/tranny and it went 12.4 @ 110, I'm gonna try to go to the track tonight and see if I can get a 12.2 or 12.1 out of it, that would make me happy.
Hopefully I will get around to finishing putting my nitrous kit back on the car soon and see what it does on a small kit.