bbc carb jets size?
bbc carb jets size? I have a 427 bbc, 11 to 1 comp. 425hp
I have a 850 holly carb, what jets should use for the street as a starting point to getting it tuned in?
I was told by a friend to ditch the 850 and put a 600cfm.
I have a 850 holly carb, what jets should use for the street as a starting point to getting it tuned in?
I was told by a friend to ditch the 850 and put a 600cfm.
TECH Enthusiast
Joined: Jul 2006
Posts: 638
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From: San Diego
Originally Posted by TTSSZ
I have a 427 bbc, 11 to 1 comp. 425hp
I have a 850 holly carb, what jets should use for the street as a starting point to getting it tuned in?
I was told by a friend to ditch the 850 and put a 600cfm.
I have a 850 holly carb, what jets should use for the street as a starting point to getting it tuned in?
I was told by a friend to ditch the 850 and put a 600cfm.
Teching In
Joined: Dec 2006
Posts: 8
Likes: 0
The 850 dble pumper can be a finiky witch...but it is not too big for a 427
If I remember right,
for open pelnum intake (torker, victor) I ran
left front 80
right front 76
left rear 76
right rear 78
If divided (performer, performer rpm) I think it was 74's in the front and 78's in the back.
Either way I had better luck running a standard bore 3310 than a spread bore...
G
If I remember right,
for open pelnum intake (torker, victor) I ran
left front 80
right front 76
left rear 76
right rear 78
If divided (performer, performer rpm) I think it was 74's in the front and 78's in the back.
Either way I had better luck running a standard bore 3310 than a spread bore...
G
Registered User
Joined: Jul 2007
Posts: 35
Likes: 0
Originally Posted by rat454
The 850 dble pumper can be a finiky witch...but it is not too big for a 427
If I remember right,
for open pelnum intake (torker, victor) I ran
left front 80
right front 76
left rear 76
right rear 78
If divided (performer, performer rpm) I think it was 74's in the front and 78's in the back.
Either way I had better luck running a standard bore 3310 than a spread bore...
G
If I remember right,
for open pelnum intake (torker, victor) I ran
left front 80
right front 76
left rear 76
right rear 78
If divided (performer, performer rpm) I think it was 74's in the front and 78's in the back.
Either way I had better luck running a standard bore 3310 than a spread bore...
G
The friend that told me to go small has a nice little speed
shop with a real nice dyno. He said that with dyno's and
computers, they have found its a fact that it takes 1.25cfm
to make 1 hp.
So the 600 is good for 480 crank hp.
I'm only making 425 or so.
The small bore is also supposed to make more air velocity and
draws the fuel better.
shop with a real nice dyno. He said that with dyno's and
computers, they have found its a fact that it takes 1.25cfm
to make 1 hp.
So the 600 is good for 480 crank hp.
I'm only making 425 or so.
The small bore is also supposed to make more air velocity and
draws the fuel better.
TECH Enthusiast
Joined: Jul 2006
Posts: 638
Likes: 0
From: San Diego
Originally Posted by TTSSZ
The friend that told me to go small has a nice little speed
shop with a real nice dyno. He said that with dyno's and
computers, they have found its a fact that it takes 1.25cfm
to make 1 hp.
So the 600 is good for 480 crank hp.
I'm only making 425 or so.
The small bore is also supposed to make more air velocity and
draws the fuel better.
shop with a real nice dyno. He said that with dyno's and
computers, they have found its a fact that it takes 1.25cfm
to make 1 hp.
So the 600 is good for 480 crank hp.
I'm only making 425 or so.
The small bore is also supposed to make more air velocity and
draws the fuel better.
