Time for some big block heads.

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pittsburghracer

pittsburghracer

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Well these heads have been sitting around since I wrecked in 2010 when they ran 8.42@160mph in my Daytona. They were on my 572 that was built for my B1 heads so they ran ok but were out of steam for the last 300 foot or so. In 2013 I bought some 2.250 Manley valves for them and put them on my shelf. In 2015 I flowed them on the bench I have now and did some touch up work on them but again stopped after flowing them telling myself the stock 2.19 valves are coming out. They go to the shop tomorrow to get the valve seats cuts for the 2.250 valves so I can see how close to 400 cfm I can get. Here are the numbers when I ran 8.42 in mid summer at Keystone

.200——139
.300——203
.400——250
.500——291
.600——326
.700——347
.800——365-375
My old bench and my limited knowledge to control speed and lack of being able to check speed left these heads in a turbulent position. Running a .850 lift roller cam she was petering out.

Like I said I hit them again December 2015 and picked up some but stopped till I could get the bigger valves installed

.200———146
.300———214
.400———267
.500———308
.600———354
.700———361
.800———363

2010 as ran. I’m going to edit this to say it was ran with the lower numbers posted up top.
 
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Small touch up and I mean small touch up gave me the second set of numbers. It becomes so easy once something clicks in your head. I can’t wait to hit these again applying what I have learned playing with these small block heads plus what I gain from the bigger valves. These are aimed for a 505 mega block build with an APD 1150 alcohol carb being built for me. Time will tell where they end up.
 
pittsburghracer said:
View attachment 1715522721 Well these heads have been sitting around since I wrecked in 2010 when they ran 8.42@160mph in my Daytona. They were on my 572 that was built for my B1 heads so they ran ok but were out of steam for the last 300 foot or so. In 2013 I bought some 2.250 Manley valves for them and put them on my shelf. In 2015 I flowed them on the bench I have now and did some touch up work on them but again stopped after flowing them telling myself the stock 2.19 valves are coming out. They go to the shop tomorrow to get the valve seats cuts for the 2.250 valves so I can see how close to 400 cfm I can get. Here are the numbers when I ran 8.42 in mid summer at Keystone

.200——139
.300——203
.400——250
.500——291
.600——326
.700——347
.800——365-375
My old bench and my limited knowledge to control speed and lack of being able to check speed left these heads in a turbulent position. Running a .850 lift roller cam she was petering out.

Like I said I hit them again December 2015 and picked up some but stopped till I could get the bigger valves installed

.200———146
.300———214
.400———267
.500———308
.600———354
.700———361
.800———363

2010 as ran. I’m going to edit this to say it was ran with the lower numbers posted up top.
Click to expand...

Interesting , thats what my victor knock offs flow at .600 .
No more than they go up from there , I`d probly not twist it up much higher , and change to a hair shorter gear , just fo grins----------
 
famous bob said:
Interesting , thats what my victor knock offs flow at .600 .
No more than they go up from there , I`d probly not twist it up much higher , and change to a hair shorter gear , just fo grins----------
Click to expand...


The Victor heads and copies are a good head from what I hear but I’ve slso heard nightmare stories of changes over the years making some different than others. Different rocker offsets and all kinds of issues getting them set up to run bigger cams. I personally have two sets of 440-1 heads and two sets of B1 heads so I won’t be traveling that road.
 
pittsburghracer said:
The Victor heads and copies are a good head from what I hear but I’ve slso heard nightmare stories of changes over the years making some different than others. Different rocker offsets and all kinds of issues getting them set up to run bigger cams. I personally have two sets of 440-1 heads and two sets of B1 heads so I won’t be traveling that road.
Click to expand...
have u flowed the b 1 heads , if u posted it , i missed it ------------
 
famous bob said:
have u flowed the b 1 heads , if u posted it , i missed it ------------
Click to expand...


I stopped at 420 cfm on the ones going on my 572 and took port molds of them. They will work great from what I saw but there’s more on the table. But it’s going to be slow going so the port molds will help me getting the other set there faster then go from there. I have titanium valves for the other set but didn’t want to use them on my first time playing with nitrous
 
I’ve tested a fair number of -1’s through the years, that have come from a variety of shops.

From what I’ve seen, 360’s from those heads with the 2.19” valve is a pretty good number.
I’ve tested many that didn’t get there.
(330’s and 340’s aren’t all that uncommon)

The best ones I’ve had on my bench are the Indy CNC345’s, which use the 2.25” valve.
They’re right at about 380@.800 lift.
 
Were these 440-1 heads already worked on before the first time you flowed them?
I don't care to race flow benches, and not trying to start something like that, but I am wondering how these heads performed on your flow benches when tested at various stages, like any velocity that is too high in areas, any dead spots, and any air trying to go back up the port? Not looking for flow numbers, just wondering generally.
I am mostly curious about performance under .650" lift levels with a good valve job but no real port work, since I will probably never build a serious engine.
Thanks for posting this kind of stuff. I enjoy reading anything related to engines, especially since the stay at home orders are still in effect and I am so bored.
 
Bobzilla said:
Were these 440-1 heads already worked on before the first time you flowed them?
I don't care to race flow benches, and not trying to start something like that, but I am wondering how these heads performed on your flow benches when tested at various stages, like any velocity that is too high in areas, any dead spots, and any air trying to go back up the port? Not looking for flow numbers, just wondering generally.
I am mostly curious about performance under .650" lift levels with a good valve job but no real port work, since I will probably never build a serious engine.
Thanks for posting this kind of stuff. I enjoy reading anything related to engines, especially since the stay at home orders are still in effect and I am so bored.
Click to expand...


I bought them used and one port was hacked on, not bad but not good. I have a bad habit since I flow sometimes each port so many times to just scribble.100-.800 on a piece of paper and writing the flow numbers on it. So finding those table pages from the first and only time I flowed a stock port (probably around 2004) would be impossible. These heads are pathetic stock. And those numbers were before this bench. My old bench had fluid manometers and I hated it. Calibration would change during the day and to get true numbers there was a formula to favor the weather. Piss on that. If you look at my old flow numbers you will see the port jump up in cfm and go turbulent. Back then I couldn’t probe the port to check speed and find issues as easy as I can now.
 
Bobzilla said:
Thanks for the reply. Always enjoy seeing what guys are doing with the parts that are available out there.
Click to expand...


I do too. I wish more guys would start their own post to help keep some separation. That way they wouldn’t get trashed up as much and confusing.
 
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