Carb sizing question???
Thread Starter
Racer
Joined: Jan 2010
Posts: 367
Likes: 1
From: Christchurch Canterbury
Carb sizing question???
On the home run on getting my 427BB fired up! ( just waiting on $500 worth of pulleys to arrive !!)
I have a rather old 800cfm Holley D/P. Needs a kit...
Have been thinking of just buying a new one.
Holley tech recommend at least a 950 cfm D/P..... I was thinking 850cfm, opinions ??
427cu, brodix race rite rect heads, solid 250@50 cam, 10.8 comp, LS6 manifold ( sadly, for hood clearance ) sould run to 7000 rpm
Cheers
I have a rather old 800cfm Holley D/P. Needs a kit...
Have been thinking of just buying a new one.
Holley tech recommend at least a 950 cfm D/P..... I was thinking 850cfm, opinions ??
427cu, brodix race rite rect heads, solid 250@50 cam, 10.8 comp, LS6 manifold ( sadly, for hood clearance ) sould run to 7000 rpm
Cheers
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
For some silly reason, a Holley 950 is actually smaller than an 850.
The 850 & 950 both use the same base plate with a 1.75" bore size.
But the venturis on a 950 are 1.375", while they are 1.5625" on an 850.
True flow for the 950 is about 830 from what I have seen.
The 850 & 950 both use the same base plate with a 1.75" bore size.
But the venturis on a 950 are 1.375", while they are 1.5625" on an 850.
True flow for the 950 is about 830 from what I have seen.
Drifting
Joined: Apr 2008
Posts: 1,540
Likes: 51
From: Lexington Park Maryland
Since you already own it, rebuild the 850cfm double pumper. You'll love it. I have one on my '67 Chevy II bracket car running a 0.30 over 454 (Weind single plane intake and iron square port heads).
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
FWIW, I've successfully run a 1050 progressive Dom (w/C454 180* intake) on a hot street 427, and will most likely end up with ~1000 Pro Systems carb and Holley Strip Dominator intake on the solid roller, rect port 427 for which I've been collecting parts these long months (still raising funds), and the latter one may be a mite tamer than yours. So, are you dead set against an L88 hood?
.
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Last edited by TheSkunkWorks; Jan 11, 2012 at 05:42 PM.
Thread Starter
Racer
Joined: Jan 2010
Posts: 367
Likes: 1
From: Christchurch Canterbury
Nope I LOVE the L88 hoods, just a budget thing at the moment, by the time i get them shipped to here ( New Zealand) and local tax ect...
Then the debate is if i should put funds for a L88 hood towards a kinsler cross ram injection, that would be my fist choice option.
Then the debate is if i should put funds for a L88 hood towards a kinsler cross ram injection, that would be my fist choice option.
FWIW, I've successfully run a 1050 progressive Dom (w/C454 180* intake) on a hot street 427, and will most likely end up with ~1000 Pro Systems carb and Holley Strip Dominator intake on the solid roller, rect port 427 for which I've been collecting parts these long months (still raising funds), and the latter one may be a mite tamer than yours. So, are you dead set against an L88 hood?
...
Nope I LOVE the L88 hoods, just a budget thing at the moment, by the time i get them shipped to here ( New Zealand) and local tax ect...
Then the debate is if i should put funds for a L88 hood towards a kinsler cross ram injection, that would be my fist choice option.
.
...
Nope I LOVE the L88 hoods, just a budget thing at the moment, by the time i get them shipped to here ( New Zealand) and local tax ect...
Then the debate is if i should put funds for a L88 hood towards a kinsler cross ram injection, that would be my fist choice option.
.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
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