Forum: Performance Parts For Sale/Wanted
03-25-2024, 06:09 PM
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Replies: 0
Views: 103
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Forum: LS Talk
03-24-2024, 03:22 PM
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Replies: 193
Views: 28,887
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Forum: Pontiac - Street
03-23-2024, 10:46 PM
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Replies: 15
Views: 1,248
just diggin' around, nobody answered this ? ...
just diggin' around, nobody answered this ?
seriously...
assuming it was a serious question...
hell yes...
1-3/8" = 1-12/32"
so it's 1-23/32" vs 1-12/32" venturi comparison
that is 11/32"...
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Forum: Pontiac - Street
03-23-2024, 12:34 AM
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Replies: 149
Views: 11,031
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Forum: Pontiac - Street
03-23-2024, 12:30 AM
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Replies: 8
Views: 254
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Forum: Pontiac - Street
03-21-2024, 04:13 PM
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Replies: 33
Views: 685
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Forum: Pontiac - Street
03-21-2024, 03:56 PM
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Replies: 33
Views: 685
All the old BG Demon carb ratings were...
All the old BG Demon carb ratings were established by wet flow testing, with all 4 barrels wide open, at 1.5" Hg./20.4" h2o.
When fluid is introduced into an airflow rig, the test pressure will...
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Forum: Pontiac - Street
03-21-2024, 01:18 PM
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Replies: 33
Views: 685
one of these with 1.75" throttles (Holley 850...
one of these with 1.75" throttles (Holley 850 size), and 1.42" throats, downleg boosters, sculpted inlet, flows 825 cfm.
put annular boosters on it, they're bigger, block airflow. it would...
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Forum: Pontiac - Street
03-21-2024, 12:38 PM
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Replies: 33
Views: 685
now, are we supposed to believe, a 1.39" throat,...
now, are we supposed to believe, a 1.39" throat, with annular boosters, without a sculpted inlet, can flow 850 cfm ?
they obviously don't because everyone is already complaining, losing 2 tenths, 2...
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Forum: Pontiac - Street
03-21-2024, 12:34 PM
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Replies: 33
Views: 685
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Forum: Pontiac - Street
03-21-2024, 12:31 PM
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Replies: 33
Views: 685
ok...using that high end, big dollar flow...
ok...using that high end, big dollar flow equipment,
we know these sizes venturis, butterflies wet flow these numbers,
and this was WITH a fully sculpted top inlet, no choke horn.
the Race Demon...
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Forum: Pontiac - Street
03-21-2024, 12:11 PM
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Replies: 33
Views: 685
If Edelbrock makes a "950" carb,
which they...
If Edelbrock makes a "950" carb,
which they said is in the works,
that will be in the ballpark for a big block 455-500 engine.
because then it will finally have a throat size,
similar to compete...
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Forum: Pontiac - Street
03-21-2024, 12:05 PM
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Replies: 33
Views: 685
dry flow is what exaggerates cfm numbers on a...
dry flow is what exaggerates cfm numbers on a carburetor.
but even if someone did flow the VRS 850,
at 1.5" HG/20.4" H2O standard,
it's going to flow a lot less than a Holley 850.
Holley got all...
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Forum: Pontiac - Street
03-21-2024, 12:02 PM
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Replies: 33
Views: 685
the smoke and mirrors cfm game was exposed...
the smoke and mirrors cfm game was exposed decades ago.
this has all been documented, hashed out 20-25 years ago.
the buying public is smarter now, which is why that Edelbrock VRS will flop.
no...
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Forum: Pontiac - Street
03-21-2024, 11:29 AM
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Replies: 33
Views: 685
the true cfm would be on a wet flow bench to...
the true cfm would be on a wet flow bench to simulate the fuel being in suspension. and that is very hard to find today, cuz it costs millions to build a bench like that. sure it may flow 850, at...
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Forum: Pontiac - Street
03-21-2024, 11:02 AM
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Replies: 149
Views: 11,031
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Forum: Pontiac - Street
03-21-2024, 10:52 AM
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Replies: 149
Views: 11,031
btw fwiw, practically all or most of the top...
btw fwiw, practically all or most of the top running NHRA Super Stock engines, have devcon or a similar epoxy inside the intake ports. they have to, in order to move the port volume around and stay...
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Forum: Pontiac - Street
03-21-2024, 10:46 AM
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Replies: 8
Views: 369
I bought a reman/return Brawler direct from...
I bought a reman/return Brawler direct from Holley. 750cfm
just another take on an old 4779 DP, with a facelift, IMHO.
never used it. sold to a friend at cost, he put it on a 6.0 LS in a truck,
it...
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Forum: Pontiac - Street
03-21-2024, 07:44 AM
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Replies: 33
Views: 685
old Holley 750- 1.375" venturi
old BG Demon...
old Holley 750- 1.375" venturi
old BG Demon 750- 1.4" venturi
new Edelbrock VRS 850- 1.39" venturi
look on the bright side,
if you want a nice, brand spankin' new 750 carb,
just buy an...
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Forum: Pontiac - Street
03-20-2024, 10:35 PM
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Replies: 19
Views: 765
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Forum: Pontiac - Street
03-20-2024, 10:30 PM
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Replies: 43
Views: 1,141
there's quite a few guys who made that much HP...
there's quite a few guys who made that much HP with a Pontiac in the past 45 years....you can make 675-700 on the stock block, with a 3" main, and a cast 455 4.21" stroke crank, with those heads. ...
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Forum: Pontiac - Street
03-20-2024, 10:19 PM
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Replies: 149
Views: 11,031
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Forum: Pontiac - Street
03-20-2024, 10:02 PM
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Replies: 149
Views: 11,031
hey I want to tell this fella something,
Joe...
hey I want to tell this fella something,
Joe Mondello used to port aluminum E-heads for Olds into the head bolt holes,
he's insert a sleeve just like a Pontiac pushrod sleeve,
you could see it...
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Forum: Pontiac - Street
03-20-2024, 09:41 PM
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Replies: 33
Views: 685
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Forum: Pontiac - Street
03-20-2024, 09:14 PM
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Replies: 33
Views: 685
found the cause of all this-
the Edelbrock...
found the cause of all this-
the Edelbrock carbs all use the correct size baseplates,
but they use smaller venturi sizes than what Holley uses.
Edelbrock 850- 1.39" venturi
Holley 850- 1.56"...
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