Join Date: Mar 2007
Location: Ontario, Canada
Thanked 0 Times in 0 Posts
Anyone considered this head swap?
I was thinking that although the 6.1L HEMI is an amazing engine that although impressive in a 4200lb LX car that maybe it isn't the best candidate for a 4700-4800lb GC. I am willing to bet that a nicely set of ported 5.7 heads when bolted onto a 6.1L shortblock and mated with the GC platform would create pure magic! Just looking at the 6.1 heads and their flow of close to 300 cfm from the factory makes me think RACE head! for a RACECAR! There's a reason Dodge hasn't relinquished the 6.1 to truck duty yet. I was thinking that 5.7 heads when ported, regularly flow 300-315cfm which is still about 20-25cfm more than a factory 6.1 casting.
Hmm---much larger port 6.1L head=290-300cfm
---much smaller port 5.7L head ported=300-315cfm
The smaller the port with the same or better flow at the same valve lifts = VELOCITY!! Velocity= throttle response and TORQUE, which = awesome driveability and FUN FUN FUN! I would have a hard time believing that no one has tried this yet and would love to hear the results if anyone has. Like I said the 6.1 and 5.7 for that matter ARE amazing engines but I think the 6.1 is more race engine than truck engine and it was pure marketing that got them put under the hood of GC's. I am so convinced that this would be THE swap that I will be trying it on my own GC SRT-8 in the very near future.
Last edited by RAMM; 03-07-2007 at 09:02 AM.