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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859355
11/25/10 11:04 PM
11/25/10 11:04 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Not sure what the altitude is here,but I know it's nowhere near 4000'! 
Randy we are about 950' round figure... the first floor
at Chrysler (CTC) is 930'
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859358
11/26/10 12:56 AM
11/26/10 12:56 AM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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OK...I failed my carb measuring/recon mission today. 'Went out to the shop after work to fire up the heater and realized my power wagon was the last unit in the first bay. It dropped so much dirt and dust I was afraid to turn on the forced air heating system in fear of a dust storm.  I spent the afternoon sweeping, putting patio furniture in the back room, and cleaning up from the last three rush jobs. Don't you hate it when you have to get cought up to start the next mission? I'll pull the carb off and measure/etc hopefully Saturday. To follow up K Falls is a tad under 4200 and it goes up up up in any direction out of the basin. Brad, we too are looking to get the hell out of here in the next six months so I can't blame your brother. The DA changes so drastically when the sun goes behind the clouds or you pass by a cold mountain run off fed lake it blows my mind. Sometimes you can actually feel the car surge a little and then the cold air comes rushing in the vents. It is really noticeable driving over the Willamette pass during early summer on a 100 degree day when you pass Odel Lake. My theory behind using the annular was two-fold. I was hoping the better atomization of the annual booster would help make the carb more consistent performance wise (pipe dream on my part, right?) and the 1050 main body would be comparable to an 850+ cfm downleg carb. I'll say that I really love that old beater 850, it has righteous throttle response on my combo! 'Sorry about the hold up. I'm hoping Larry with the Blue 4-speed '68 RR chimes in as he runs a QF 1050AN and could provide us with some insight.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: BradH]
#859359
11/26/10 12:15 PM
11/26/10 12:15 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
... I'd have to dig 'em up, but IIRC some actual wet flow #s that BG provided when the Gold / Silver Claws came out (predecessors to the Demons) showed that the 1.56" venturi w/ annular boosters flowed no more (maybe less?) than a 1.42" venturi w/ downleg boosters...
OK, found the data I was talking about in that previous post. These are the #s that BG listed for their Gold Claw series in different venturi & booster configurations. All these are w/ 1.75" butterflies, slabbed shafts & CNC venturi inserts:
Venturi -- Booster - 1.5" Hg ==> Model
1.562 --- Annular -- 875 ==> "750"
1.425 --- Downleg -- 980 ==> "825"
1.500 --- Downleg -- 1036 ==> "975"
1.590 --- Annular -- 1017 ==> "950"
1.562 --- Downleg -- 1084 ==> "1025"
The Model designations they used at the time don't make much sense to me. The spec sheet had a footnote saying "Model sizes are based on median flow rates observed on a range of engine sizes and RPMs suited to each carburetor."
Regardless, the point I'm trying to convey is the booster configuration can have a major impact on the effective flow rate of any given venturi size.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: BradH]
#859360
11/26/10 01:18 PM
11/26/10 01:18 PM
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Joined: Feb 2005
Posts: 4,316
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,316
Prospect, PA
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Quote:
Regardless, the point I'm trying to convey is the booster configuration can have a major impact on the effective flow rate of any given venturi size.
....and, not all "downleg" boosters are the same either.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: BradH]
#859363
11/26/10 11:08 PM
11/26/10 11:08 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Quote:
Quote:
... I'd have to dig 'em up, but IIRC some actual wet flow #s that BG provided when the Gold / Silver Claws came out (predecessors to the Demons) showed that the 1.56" venturi w/ annular boosters flowed no more (maybe less?) than a 1.42" venturi w/ downleg boosters...
OK, found the data I was talking about in that previous post. These are the #s that BG listed for their Gold Claw series in different venturi & booster configurations. All these are w/ 1.75" butterflies, slabbed shafts & CNC venturi inserts:
Venturi -- Booster - 1.5" Hg ==> Model
1.562 --- Annular -- 875 ==> "750"
1.425 --- Downleg -- 980 ==> "825"
1.500 --- Downleg -- 1036 ==> "975"
1.590 --- Annular -- 1017 ==> "950"
1.562 --- Downleg -- 1084 ==> "1025"
The Model designations they used at the time don't make much sense to me. The spec sheet had a footnote saying "Model sizes are based on median flow rates observed on a range of engine sizes and RPMs suited to each carburetor."
Regardless, the point I'm trying to convey is the booster configuration can have a major impact on the effective flow rate of any given venturi size.
Excellent information sir, thank you for sharing!
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859371
12/02/10 12:53 AM
12/02/10 12:53 AM
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Joined: Jan 2003
Posts: 9,146
Now - Port Orange,Fla. Former...
MIKES_DUSTER
master
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master
Joined: Jan 2003
Posts: 9,146
Now - Port Orange,Fla. Former...
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Quote:
GTX currently has a borrowed Bigs Holley 950HP on it! Runs Real strong with it! Unfortunately,won't be able to do any track testing until April or so! I've got a few more carbs being sent to me to try out! One 850,and a couple of ProForm 1050's...one downleg booster...the other an annular booster!  
I wish I had some friends that would lend me some carbs like you!!! Ok,I just wish I had friends!!!  LOL
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859373
12/02/10 01:32 AM
12/02/10 01:32 AM
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Joined: Jan 2003
Posts: 9,146
Now - Port Orange,Fla. Former...
MIKES_DUSTER
master
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master
Joined: Jan 2003
Posts: 9,146
Now - Port Orange,Fla. Former...
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Quote:
Thanks Jeremiah! Good to know the baseline set-up! I'll probably have to change the squirters! The 950 has a 37pri. and a 40sec. Won't really know until I try it out! Mike..it REALLY took me by surprise how many GRACIOUS and TRUSTING people are members here! I have personally only met 2 of the 6 loaners! THANK YOU ALL for your HELP...You guys make me VERY PROUD to belong to such a Mopar Brotherhood!  
  
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Warsteiner 
Sounds like a real potporri of weather out there! 
