292 flow #s

[pamotorman]

A little off topic but not by much.

Larry,
Do you have any history on tests of the 034 cast BowTie Heads? I ask this here because I think both the 034 and the 292 Turbo were similar. Am I wrong?

Ed

from chevy.

[maxracesoftware]

Thank you for your information. I was thinking about an angle mill too. Not anything bad but I would like to get the chamber under 64cc which would get me a little over 13-1. You don't happen to have any photo's of these heads do you by chance?

MADCAP #292 Turbo version was the most "Open-Chamber" i've ever seen

they created a very large unshrouded Open-Chamber
then they would severly angle-mill Head to get back to lower CC Chambers

same thing i was doing in a sense,
i heavily experimented trying to get best Flow numbers with least unshrouding/opening up Chamber
so i could get least Chamber CCs with so much Angle-milling

Rons Porting Service had this down to a Science
they left a step in the intake side of the Chamber that was basically stock Chamber wall
then laid back the Chamber wall so that at .450" Valve Lift or upwards to .800 Lifts the Intake Valve was progressively more unshrouded
in that method they were able to keep Chamber CC's low, yet with very good Intake Flow

i looked for the Jimmy Bell #292 a few months back, but could not immediately find it
i know its somewhere in the Shop ... likewise all the #292 Turbo Heads are the futher most behind all the newer Heads under Tables
its some effort to get to them...but i'll take pictures and Post them asap

also have 4 more Boxes of Data to look thru
as a lot of Flow sheets were stapled together ... but many are detached and separated ..probably in those other boxes .

[maxracesoftware]

A little off topic but not by much.

Larry,
Do you have any history on tests of the 034 cast BowTie Heads? I ask this here because I think both the 034 and the 292 Turbo were similar. Am I wrong?

Ed

from chevy.

here's Out-the-Box #034 cast-iron Flow numbers on my Bench
you can see my Bench is more conservative than GM/Chevy's Ron Sperry Flowbench ( at least on the Intake Side )

#034 Cast-iron 1st Version by Chevy
Out-of-Box Stock Flow Numbers 2.020/1.600
SF-600 Bench 4.000" Bore Fixture
Lift__Intake__Exhaust
.200__117.9___107.1
.300__169.5___138.7
.400__205.0___145.1
.450__216.6
.500__228.3___145.6
.550__222.1
.600__215.8___147.7
.650__216.8
.700__217.8___147.7

the 1st versions can be made to Flow these following Numbers
SF-600 Bench 4.125" Bore Fixture
2.085/1.585" tulip titanium (all-out Porting, but no welding, with Headbolt Tubes+ elongated Holes, corrected angles )
Lift__Intake__Exhaust_(No-Pipe)
.200__138.0___106.7
.300__199.1___150.3
.400__245.6___200.6
.450__263.1
.500__278.7___216.6
.550__289.7
.600__296.1___222.0
.650__302.0
.700__307.5___224.1
.750__311.4
.800__315.8___224.5
.850__319.3
.900__322.5___225.2

....picked up the Flow Numbers over Stock + 100 CFM gains

[redliner]

I have a set of 292s from 30 years ago. They are angle milled and have 2.065 valves. They propelled my 42 Stude @3200 lbs to 10.9s @ 120 with a 13.8 -1 360 cu in motor with a flattappet cam. I never had them on a bench but would say they work pretty good. I need the money so they are for sale.... what are they worth I wonder....

[maxracesoftware]

I have a set of 292s from 30 years ago. They are angle milled and have 2.065 valves. They propelled my 42 Stude @3200 lbs to 10.9s @ 120 with a 13.8 -1 360 cu in motor with a flattappet cam. I never had them on a bench but would say they work pretty good. I need the money so they are for sale.... what are they worth I wonder....

2.065 Int Valves ... sounds like the old SpeedPro 2.065" OD valves i use to buy
put many of SpeedPro 2.065 intake valves in old #462's #461 castings

look inside your waterjacket for brace to intake bowl...see if its there ??

there were 3 different #292 Turbo versions i know about ( supposedly were A B C designated named versions ?? )
there was a brace added inside the waterjacket to the intake bowl
then there was a version had slightly spread valve centers
the brand new pair i have 2.080/1.600 valve job and can probably VJ a 2.090 int valve OD and still have enough clearance to exh OD

Bill Jenkins also mentioned some of these #292 Turbo versions

as to how much money they are worth,
its hard to say ? ... these days with so many superior Heads , the #292's are not going to be worth much money like in the old Days

i'm also willing to sell my brand new pair, to someone who would be willing to continue to max them out
as only 1 Intake Port is maxed out, have Headbolt tubes, heavy angle-milled, 2.080/1.600 VJ, spring seats 1.640,
pushrod areas milled, Phosphor-bronze alloy 16 guides, etc

this is way too much Head for beginner to tackle and try to duplicate this 1 intake port/chamber , etc.

with 2.080/1.600 valves
HeadBolt Tubes 213CC Ports
only 1 Intake Port finished so far
SF-600 Bench 4.000" Bore Fixture
Lift__Intake__Exhaust (with short pipe)
.200_129.3
.300_188.2
.400_236.5
.450_252.3
.500_270.4
.550_279.1
.600_285.4
.650_290.1
.700_297.6
.750_298.8 ...... pretty certain it would be in the 300 CFM range by .800-.850 Valve Lift

also have 1 good shape #292 Turbo 2.055/1.600 VJ minor ported , not much angle-mill
probably in the 260+ CFM range
willing to sell this 1 head

[redliner]

I have a set of 292s from 30 years ago. They are angle milled and have 2.065 valves. They propelled my 42 Stude @3200 lbs to 10.9s @ 120 with a 13.8 -1 360 cu in motor with a flattappet cam. I never had them on a bench but would say they work pretty good. I need the money so they are for sale.... what are they worth I wonder....

2.065 Int Valves ... sounds like the old SpeedPro 2.065" OD valves i use to buy
put many of SpeedPro 2.065 intake valves in old #462's #461 castings

look inside your waterjacket for brace to intake bowl...see if its there ??

there were 3 different #292 Turbo versions i know about ( supposedly were A B C designated named versions ?? )
there was a brace added inside the waterjacket to the intake bowl
then there was a version had slightly spread valve centers
the brand new pair i have 2.080/1.600 valve job and can probably VJ a 2.090 int valve OD and still have enough clearance to exh OD

Bill Jenkins also mentioned some of these #292 Turbo versions

as to how much money they are worth,
its hard to say ? ... these days with so many superior Heads , the #292's are not going to be worth much money like in the old Days

i'm also willing to sell my brand new pair, to someone who would be willing to continue to max them out
as only 1 Intake Port is maxed out, have Headbolt tubes, heavy angle-milled, 2.080/1.600 VJ, spring seats 1.640,
pushrod areas milled, Phosphor-bronze alloy 16 guides, etc

this is way too much Head for beginner to tackle and try to duplicate this 1 intake port/chamber , etc.

with 2.080/1.600 valves
HeadBolt Tubes 213CC Ports
only 1 Intake Port finished so far
SF-600 Bench 4.000" Bore Fixture
Lift__Intake__Exhaust (with short pipe)
.200_129.3
.300_188.2
.400_236.5
.450_252.3
.500_270.4
.550_279.1
.600_285.4
.650_290.1
.700_297.6
.750_298.8 ...... pretty certain it would be in the 300 CFM range by .800-.850 Valve Lift

also have 1 good shape #292 Turbo 2.055/1.600 VJ minor ported , not much angle-mill
probably in the 260+ CFM range
willing to sell this 1 head

Ya With sooo many good heads out there these days..... I will look for the brace. Thanks.

[redliner]

I have a set of 292s from 30 years ago. They are angle milled and have 2.065 valves. They propelled my 42 Stude @3200 lbs to 10.9s @ 120 with a 13.8 -1 360 cu in motor with a flattappet cam. I never had them on a bench but would say they work pretty good. I need the money so they are for sale.... what are they worth I wonder....

2.065 Int Valves ... sounds like the old SpeedPro 2.065" OD valves i use to buy
put many of SpeedPro 2.065 intake valves in old #462's #461 castings

look inside your waterjacket for brace to intake bowl...see if its there ??

there were 3 different #292 Turbo versions i know about ( supposedly were A B C designated named versions ?? )
there was a brace added inside the waterjacket to the intake bowl
then there was a version had slightly spread valve centers
the brand new pair i have 2.080/1.600 valve job and can probably VJ a 2.090 int valve OD and still have enough clearance to exh OD

Bill Jenkins also mentioned some of these #292 Turbo versions

as to how much money they are worth,
its hard to say ? ... these days with so many superior Heads , the #292's are not going to be worth much money like in the old Days

i'm also willing to sell my brand new pair, to someone who would be willing to continue to max them out
as only 1 Intake Port is maxed out, have Headbolt tubes, heavy angle-milled, 2.080/1.600 VJ, spring seats 1.640,
pushrod areas milled, Phosphor-bronze alloy 16 guides, etc

this is way too much Head for beginner to tackle and try to duplicate this 1 intake port/chamber , etc.

with 2.080/1.600 valves
HeadBolt Tubes 213CC Ports
only 1 Intake Port finished so far
SF-600 Bench 4.000" Bore Fixture
Lift__Intake__Exhaust (with short pipe)
.200_129.3
.300_188.2
.400_236.5
.450_252.3
.500_270.4
.550_279.1
.600_285.4
.650_290.1
.700_297.6
.750_298.8 ...... pretty certain it would be in the 300 CFM range by .800-.850 Valve Lift

also have 1 good shape #292 Turbo 2.055/1.600 VJ minor ported , not much angle-mill
probably in the 260+ CFM range
willing to sell this 1 head

I see a A in both heads

[maxracesoftware]

I see a A in both heads

from memory ... i think all or most of #292 Turbo Heads had an "A" on them
and that the "B" and "C" were just terms used to describe the newer changes to the Cores/castings

i think the "B" had thicker walls in the Bowl areas ??

and the "C" had the slightly spread valve centerlines with maybe other changes ??

sort of like the #034 Bowties had at least 5 different distinct versions
at one time i had all 5 different #034 versions in my Shop, making it very easy to see differences

[maxracesoftware]

I see a A in both heads

from memory ... i think all or most of #292 Turbo Heads had an "A" on them
and that the "B" and "C" were just terms used to describe the newer changes to the Cores/castings

i think the "B" had thicker walls in the Bowl areas ??

and the "C" had the slightly spread valve centerlines with maybe other changes ??

sort of like the #034 Bowties had at least 5 different distinct versions
at one time i had all 5 different #034 versions in my Shop, making it very easy to see differences

I see a A in both heads

... i just looked at all the #292's i had in the Shop
and none were the "A" 's .... i'd like to know the exact differences in that "A" head to compare

i have 3 "B" 's ... they DO NOT have the brace in the waterjacket

and 2 "C" 's ... they DO have the brace in the waterjacket ... these are the 2 brand new castings
and the 292 number cast in the waterjacket is orienated so that if the spark plug side is nearest to you
and the intake flange is furtherest from you.. if you view in the waterjacket at the bottom of the Int Runner the "292" reads eactly as i posted here

but the 3 "B" 's the 292 number is upside down ...and no brace

[maxracesoftware]

[maxracesoftware]

[maxracesoftware]

the "Brace" between the 2 Intake Bowls inside the waterjacket in the "C" Heads


and an old Ported "B" Head

[maxracesoftware]

and various aluminum templates created to make layouts fast and accurate locations
...still missing are a few more #292 Turbo templates
.... there is already an allowance made in these templates for the scriber's point diameter



Mr Gasket #113 extra thick intake gasket

[maxracesoftware]

[Carnut1]

Great photos! Thank you!