Why do people hate on stock ls3 castings
#222
Funny as though air is Being pushed rather than Pulled. Volume/CSA can be over come on F/I. Oh air speed Nor airflow isn't being helped with F/I pushing air into the cylinder. Help me with this People or Mars. Too many 2 a days 12hrs + seen the last thread and just a exhaust valve.
Last edited by Patron; 05-18-2017 at 07:17 PM.
#224
#226
Funny as though air is Being pushed rather than Pulled. Volume/CSA can be over come on F/I. Oh air speed Nor airflow isn't being helped with F/I pushing air into the cylinder. Help me with this People or Mars. Too many 2 a days 12hrs + seen the last thread and just a exhaust valve.
A boosted engine has slower air speed than a N/A engine. This is due to the intake charge having much more mass and density than a N/A engine. Thus it moves slower, but has more inertia. It's like the difference between a Mazda Miata and a dump truck. Although the Miata might be going 80mph versus the dump truck at 55mph, the dump truck has more inertia AND will not turn anywhere near as well as the Miata. Just like the intake charge of a boosted engine.
Velocity IS flow, and flow IS velocity. Velocity of a fluid through a given sized orifice also determines flow through that orifice.
#227
This decreases flow from .100-.300 lift, catches back up by .400 and increases significantly past .500 lift.
#228
My dad has a 08 2500 HD with square port heads and it's a dog at low RPM. Get the engine past 3000 rpm and it comes to life. I just can't believe that GM put such a mismatched head on a truck.
#229
#231
#232
I also own a 2009 extended 2wd with a 4.8 and it's a dog until well over 3,000 rpms but that's due to the small engine and rear gear ratio. Goes like hell after you get the rpms up but won't spin the tires unless it rains or snows first.
Last edited by LLLosingit; 05-20-2017 at 09:34 AM.
#233
#235
Don't blame that on the heads, They could be the issue but gearing and how the ECU controls the timing can also make the engine a dog down low. My uncle is 100% ford guy and drove a friends newer 2500hd (gas) and was impressed and that's saying a lot. He said it will break the tires loose trying to get the race trailer up to speed.
I also own a 2009 extended 2wd with a 4.8 and it's a dog until well over 3,000 rpms but that's due to the small engine and rear gear ratio. Goes like hell after you get the rpms up but won't spin the tires unless it rains or snows first.
I also own a 2009 extended 2wd with a 4.8 and it's a dog until well over 3,000 rpms but that's due to the small engine and rear gear ratio. Goes like hell after you get the rpms up but won't spin the tires unless it rains or snows first.
I had a 2011 sierra 6.2 and it sure wasn't lacking in TQ compared to any 5.3 truck. From idle to redline it just had way more power. Would destroy the tires and the 5.3 wouldn't even do a burnout.
#236
I think the 2011 model was a great year for the 6.2 motor... they didn't have the stupid retarded DOD bull$#it.
#237
#238
Lol.....soflo don't have much smahts