I was wanting to know if anybody knows the flow numbers for gm 461 camel hump heads with 1.94/1.50 valves?

Thanks in advance,
John

I don't have anything for the 461 but a 186 is about 185/135. the 186 does have a better chamber and probabily a 202 valve the chart doesn't say

i need the numbers for a flow bench test done on the heads,
sorry for not explaining a little better.

John

http://www.topher.net/~bearman/gmheadcomp.html

gives some flow # on heads

My -461's with 2.02"/1.60" valves cc'ed at 66cc's and appear to be stock.

They do have a cylinderical relief around the intake valves that I assume is where GM used a plunge cut grinding wheel to lay the back and side intake walls back to counter any shrouding.
They didn't touch the "carbon crunch" flat quench area behind the sparkplug. Hope this helps. pdq67

I don't know about accuracy as I think I am third hand, but...

Intake rwmers should be right around 161 CC's, and exhaust right around 62 CC's (unless they were the 461X casting, then they were about 172 CC's intake, and about 64 CC's exhaust).

The actual CFM flow numbers would depend on if any work was done to the heads, and the quality of the valve job

. I did read one test on flow #'s for a 461 (stock, untouched), the #'s were as follows:
.050" 1-38.9, E-20.9
.100" 1-57.9, E-44.0
.150" 1-79.6, E-60.7
.200" 1-104.7, E-82,3
.250" 1-125.6, E-101.9
.300" 1-148.0, E-114.4
.400" 1-175.2, E-129.8
.500" 1-187.1, E-132.6
.600" 1-188.5, E-139.5
.650" 1-188.5, E-139.5

These flow #'s were just something I found off the 'net, I don!t know how valid the data is. They are supposed to be for an untouched 461 head with 1.94/1.50 valves. I hope this helps.

------------------
69 Camaro Z28 "clone" - 327 AT
"461" camel back heads,
edelbrock, hooker, ultradyne,
TRW etc.
700R4 TPI transmission

pdq is right, with the larger intake valve the chamber is opened up to unshroud the valve and you end up with 66 cc chambers. Your 194 valve -461s like many of them were have 64 cc chambers because the chamber isn't opened up around the intake valve.

oops!

[This message has been edited by PDQUICK (edited 11-27-2001).]