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Re: The all new Barry Grant Street Demon carb
[Re: Streetwize]
#1226368
05/25/12 02:26 PM
05/25/12 02:26 PM
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Joined: Dec 2006
Posts: 3,533
Indiana
Fury Fan
master
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master
Joined: Dec 2006
Posts: 3,533
Indiana
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BG is listing these as having 1 3/8" primary bores, which would basically be OEM sizes for smallblocks. From http://ramchargercentral.com/engine/thermoquad-guide/:Quote:
The Thermo-Quad was available with two primary throttle bore sizes, 1-3/8"
and 1-1/2". Flow ratings (CFM) vary depending on the source, but
the TQs with the 1-3/8" bores are listed as 750-800 CFM and those with the
1-1/2" primary throttle bores are rated at 800-850 CFM. All TQs have the
2-1/4" diameter secondary throttle plates. The primary bore size depended
on application. In general, all 78 and later 318s and 360s and all 340s had
the smaller bore. Earlier 360s varied depending on application, most 400s
and all 440s had the large bore. The 9000 series have the small primary bore
and were rated by Carter at 800 cfm. Later TQs (ie, Lean Burn and ESA
applications, feedback systems) are quoted with less flow ratings, but
this is due to the control of the carburetion system, not the inherent
flow capability of the basic carburetor. The internal metering is set for
leaner running conditions for Lean Burn. Either bore size can be tuned
to run well on most engine combinations. The smaller bore offers a slight
increase throttle response but less overall flow. The different bore sizing,
ie. speadbore, is an aspect that can lead to increased fuel economy while
delivering similar wide open throttle (WOT) performance to an equivalent
standard bore configuration. The adjustability of the TQ and the
spreadbore configuration allows the use of a large CFM carburetor on
a small displacement engine.
I'm curious how well this would work on a '65 413HP?  I'm not sure I want to be a guinea pig for it, although if it's a bad fit I believe Summit would take it back with no questions.
And I wonder if an OEM 1 1/2" baseplate could be installed, would it fit and would it work well???
Last edited by Fury Fan; 05/25/12 02:28 PM.
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Re: The all new Barry Grant Street Demon carb
[Re: ZIPPY]
#1226369
05/25/12 06:59 PM
05/25/12 06:59 PM
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Joined: Oct 2007
Posts: 1,031
Raleigh N.C
hemiparts
"Missile Pilot"
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"Missile Pilot"
Joined: Oct 2007
Posts: 1,031
Raleigh N.C
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Quote:
Yep I sort of gathered that....their area code changed from Georgia to Kentucky so that pretty much tells the tale.
I'm on the phone with them right now, am not expecting miracles but it doesn't hurt to let them know...
I just sent my demon back today to be checked out and it went to Dalahoga (sp) Ga. Sales maybe handled through Holley but tech must still be in GA.
Chris
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Re: The all new Barry Grant Street Demon carb
[Re: cogen80]
#1226371
05/26/12 09:32 AM
05/26/12 09:32 AM
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Joined: Jan 2003
Posts: 8,940
Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,940
Holly/MI
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Interesting product! The old Holley 3-barrel required a single-plane or you had to clearance the spot between the two secondary bores at the intake due to the oblong shape of the long/wide blade??? They would look cool  and be fun (1250 cfm) on an old school T-ram! 
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: The all new Barry Grant Street Demon carb
[Re: Dean_Kuzluzski]
#1226372
11/07/12 12:19 AM
11/07/12 12:19 AM
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Joined: May 2004
Posts: 4,920
Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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I'm getting ready to bolt one on my 446 in my 1986 RC that I basically built for towing and hauling my family around. I'm hoping that it does well.
I just done a search in Google to see if someone as tried this already and found this thread.
Moparlee
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Re: The all new Barry Grant Street Demon carb
[Re: Cuda367]
#1226374
11/08/12 08:11 AM
11/08/12 08:11 AM
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Joined: May 2004
Posts: 4,920
Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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Well I'm not sure if I should post this here, but what a fight. They really didn't engineer this for us mopar guys at all.
The throttle bolt (that they say is for Chrysler and that is sold separately) wouldn't fit my accelerator cable at all.
Either side of the bolt stud....then you have to put the cable up high so that it will clear the carb stuff on the throttle linkage.
Took my four hole 1 in spacer out of it and that seem to help that, but now my three piece kick down won't even go on now cause of the throttle being to low.
They need to make bracket like Holley, and Edelbrock makes.
I guess that I have one of those and I'll try and just modify it to fit the Street Demon.
Moparlee
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Re: The all new Barry Grant Street Demon carb
[Re: Robbins]
#1226375
11/08/12 09:23 AM
11/08/12 09:23 AM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
Well I'm not sure if I should post this here, but what a fight. They really didn't engineer this for us mopar guys at all.
The throttle bolt (that they say is for Chrysler and that is sold separately) wouldn't fit my accelerator cable at all.
Either side of the bolt stud....then you have to put the cable up high so that it will clear the carb stuff on the throttle linkage.
Took my four hole 1 in spacer out of it and that seem to help that, but now my three piece kick down won't even go on now cause of the throttle being to low.
They need to make bracket like Holley, and Edelbrock makes.
I guess that I have one of those and I'll try and just modify it to fit the Street Demon.
there is a bracket out there for the other demons to use your stock cable and kick down , I wonder if it fits this new version hmmmmm
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