491RWHP 448RWTQ Cam only LS3 2014 Camaro SS 1LE
06-08-2014, 12:58 AM
#21
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So the heads are stock too? How are the DD characteristics around town?
Martin, would this be a good grind to run in an M6 GXP, 3.70 gears, full Kooks LT exhaust?
Martin, would this be a good grind to run in an M6 GXP, 3.70 gears, full Kooks LT exhaust?
06-09-2014, 04:48 PM
#22
Excellent results Martin. It sucks that you can't get the correct DCR out of these motors to really let the cam shine. You would crush 500rw with exhaust, ported intake and TB. Very impressive. Keep the innovations up.
06-12-2014, 08:06 PM
#27
isn't the dcr on this setup 8.23/1? that's about right for running on pump no?
06-12-2014, 10:02 PM
#28
With your cam, you should be running 12.4 compression. I am sure you would pick up a ton of power. My 416 with less head and a similar cam with only 8.5 DCR made 573/530rw. Your DCR is 4 tenths lower then what my stock Z06's with a 224/228 cam that I ran 10lbs of boost on had. Cylinder pressure is what we are going for. If you don't have a blower or bottle then you need to make it with compression.
Last edited by Pray; 06-12-2014 at 10:14 PM.
06-12-2014, 10:16 PM
#29
I am sure this will start and argument. Yes the DCR is down in the 8.2's but no it is not about right. 8.23 is low. 8.8 is perfect for 93 octane. Anything less then that and you are giving up power and tq. You can get away with a little more in light cars if the lobe sep is tighter or it is advanced more. Like the SNS Stg 2 LS2 cam. It seems to like 8.9 DCR. Martin will correct me if I am wrong on that cam. Everything I do, I shoot for 8.8 or as close as I can get to it. I live in the South also and have no issues.
06-13-2014, 07:18 AM
#30
ok cool, i was just wondering.. my dcr is 7.8 with the cam i'm running, i'm planning to hit it with 8psi on a procharger later but it stil makes decent power on pump n/a with the current setup... power peaks at 5800 then goes flat til redline at 6800... i wonder if that is cuz the dcr is low?
06-13-2014, 11:30 AM
#32
I honestly do not pay as much attention to DCR as I used to.
A DCR calculation IMO now is only good for cranking compression.
DCR will rise as RPM rises. As VE rises as RPM rises, so does cylinder pressure. Air has mass and the more air that enters the cylinder as VE is rising the more pressure created when it is compressed.
Alvin@PCM said it best. DCR is a static measurement for a dynamic equation.
A DCR calculation IMO now is only good for cranking compression.
DCR will rise as RPM rises. As VE rises as RPM rises, so does cylinder pressure. Air has mass and the more air that enters the cylinder as VE is rising the more pressure created when it is compressed.
Alvin@PCM said it best. DCR is a static measurement for a dynamic equation.
that is with 11.8 afr for the whole pull as well, Martin knows his stuff
06-15-2014, 08:02 PM
#34
[QUOTE=Goosecaddy05;18267756] Yes he does. The best part is that he shares his knowledge.
Was your motor tuned to 11.8afr or was that just what you had when it was on the dyno? Very impressive for sure. Sometimes fuel doesn't make that big of a difference. I leaned my truck and TBSS out to 12.8-13.0afr from 11.5ish and really didn't gain much.
Was your motor tuned to 11.8afr or was that just what you had when it was on the dyno? Very impressive for sure. Sometimes fuel doesn't make that big of a difference. I leaned my truck and TBSS out to 12.8-13.0afr from 11.5ish and really didn't gain much.
06-15-2014, 09:59 PM
#35
[QUOTE=Pray;18270791]
Yes he does. The best part is that he shares his knowledge.
Was your motor tuned to 11.8afr or was that just what you had when it was on the dyno? Very impressive for sure. Sometimes fuel doesn't make that big of a difference. I leaned my truck and TBSS out to 12.8-13.0afr from 11.5ish and really didn't gain much. it was tuned at 11.8, my tuner is very conservative... he does it because of the ethanol in gas now lowering the safe afr
Yes he does. The best part is that he shares his knowledge.
Was your motor tuned to 11.8afr or was that just what you had when it was on the dyno? Very impressive for sure. Sometimes fuel doesn't make that big of a difference. I leaned my truck and TBSS out to 12.8-13.0afr from 11.5ish and really didn't gain much.
08-31-2014, 03:15 PM
#39
tff lol. tf
