Anyone know where to get some head flow numbers? I have looked almost everywhere and I cant find anything on them! Just the regular Hemi.

 

I seen where the stock 5.7L heads flow 250 @ .400 and right around 270 peak cfm. That's some pretty good mid lift numbers!!

Just wondering how much better the 6.1L heads will be, since they port them a little bit.


EDIT: I don't know any of the details about who flowed them or whatever, but here are the numbers they posted.

65 cfm @.100 lift 28"
144 @ .200
214 @ .300
250 @ .400
262 @ .500
265 @ .600
268 @ .700
269 @ .800

 

Found some more info...


""We did a Mild Full Port to the 5.7 Hemi head with its stock valves and came up with:

68cfm @ .100 lift 28"
144 @ .200
222 @ .300
270 @ .400
293 @ .500
300 @ .600
304 @ .700
310 @ .800"

 

I found an article saying with 10 minutes of port work on the exhaust it went from 165 to 195cfm at .600" lift. Sounds like you could build a monster with those stock heads after a little more work and larger valves.

 

I read an article about hot-rodding a HEMI crate motor -- same old complaint -- they can't crack the EFI. They were trying to hit 400hp with the 5.7L with bolt-ons and they couldn't do it -- and that was after the motor was broken in on a dyno. Without something like LT1/LS1 edit, I don't think you'll see much being done with the motor short of going to an ACCEL/FAST computer.

 

There are guys on LXforums.com breaking 350rwhp on a 5.7 with dynatech headers, high flow cats, catback, and CAI. I am really interested to see what kind of numbers these engines start to put out after someone cracks the PCM.

 

Definitely! They seem to have some awesome heads on them.