68 427 with Brodix Race Rite Heads Carb Help
Thread Starter
Racer
Joined: Feb 2010
Posts: 364
Likes: 10
From: nashville tn
68 427 with Brodix Race Rite Heads Carb Help
Just looking for some insite/help
Any one else running similar combination-I,m not having a lot of luck yet with getting this new build running correctly: Maybe need new carb & intake.
Below is the same cam I had with the stock iron heads, small valves. Car ran fine.
Hyd Roller Intake Exhaust
Duration @.050” 229 241
Duration @.006” 288 300
Lobe Lift .365” .340”
Valve Lift – 1.7 Ratio .620” .578”
Centerline 105 113
Open Close Open Close
Timing Events @ .050 9.5 39.5 53.5 7.5
Valve Lash (Hot) .000” .000”
Lobe Separation: 109
Overlap: 17
Spring Pressure Seat: 135-145 Max Open: 400
New Icon pistons .060
Brodix RR heads 270ccx119cc
Int valve 2.250 Exh 1.88 dia.
new geometry recommended roller rockers-
still have the same stock aluminum 390 hp intake and a newer quadrajet I have been trying to get dialed in.
timing int @13 deg - 35 deg mechanical with vac advance 20-45 deg +-
TKX 5peed
I have read Cliffs book 10 times and still learning- I drilled idle tubes, channel restrictors and increased jet size/rods .077- .045 which as helped. I have been emailing Cliff as well for some thoughts.
No dyno in Nashville that do carbs anymore-I suppose I should get a GOOD AFR Kit or do I have a bag of worms on my hand with this carb and intake?
Any help/ thoughts would be great.
THX Mike
Any one else running similar combination-I,m not having a lot of luck yet with getting this new build running correctly: Maybe need new carb & intake.
Below is the same cam I had with the stock iron heads, small valves. Car ran fine.
Hyd Roller Intake Exhaust
Duration @.050” 229 241
Duration @.006” 288 300
Lobe Lift .365” .340”
Valve Lift – 1.7 Ratio .620” .578”
Centerline 105 113
Open Close Open Close
Timing Events @ .050 9.5 39.5 53.5 7.5
Valve Lash (Hot) .000” .000”
Lobe Separation: 109
Overlap: 17
Spring Pressure Seat: 135-145 Max Open: 400
New Icon pistons .060
Brodix RR heads 270ccx119cc
Int valve 2.250 Exh 1.88 dia.
new geometry recommended roller rockers-
still have the same stock aluminum 390 hp intake and a newer quadrajet I have been trying to get dialed in.
timing int @13 deg - 35 deg mechanical with vac advance 20-45 deg +-
TKX 5peed
I have read Cliffs book 10 times and still learning- I drilled idle tubes, channel restrictors and increased jet size/rods .077- .045 which as helped. I have been emailing Cliff as well for some thoughts.
No dyno in Nashville that do carbs anymore-I suppose I should get a GOOD AFR Kit or do I have a bag of worms on my hand with this carb and intake?
Any help/ thoughts would be great.
THX Mike
Race Director
Joined: May 2006
Posts: 18,782
Likes: 2,597
Just looking for some insite/help
Any one else running similar combination-I,m not having a lot of luck yet with getting this new build running correctly: Maybe need new carb & intake.
Below is the same cam I had with the stock iron heads, small valves. Car ran fine.
Hyd Roller Intake Exhaust
Duration @.050” 229 241
Duration @.006” 288 300
Lobe Lift .365” .340”
Valve Lift – 1.7 Ratio .620” .578”
Centerline 105 113
Open Close Open Close
Timing Events @ .050 9.5 39.5 53.5 7.5
Valve Lash (Hot) .000” .000”
Lobe Separation: 109
Overlap: 17
Spring Pressure Seat: 135-145 Max Open: 400
New Icon pistons .060
Brodix RR heads 270ccx119cc
Int valve 2.250 Exh 1.88 dia.
new geometry recommended roller rockers-
still have the same stock aluminum 390 hp intake and a newer quadrajet I have been trying to get dialed in.
timing int @13 deg - 35 deg mechanical with vac advance 20-45 deg +-
TKX 5peed
I have read Cliffs book 10 times and still learning- I drilled idle tubes, channel restrictors and increased jet size/rods .077- .045 which as helped. I have been emailing Cliff as well for some thoughts.
No dyno in Nashville that do carbs anymore-I suppose I should get a GOOD AFR Kit or do I have a bag of worms on my hand with this carb and intake?
Any help/ thoughts would be great.
THX Mike
Any one else running similar combination-I,m not having a lot of luck yet with getting this new build running correctly: Maybe need new carb & intake.
Below is the same cam I had with the stock iron heads, small valves. Car ran fine.
Hyd Roller Intake Exhaust
Duration @.050” 229 241
Duration @.006” 288 300
Lobe Lift .365” .340”
Valve Lift – 1.7 Ratio .620” .578”
Centerline 105 113
Open Close Open Close
Timing Events @ .050 9.5 39.5 53.5 7.5
Valve Lash (Hot) .000” .000”
Lobe Separation: 109
Overlap: 17
Spring Pressure Seat: 135-145 Max Open: 400
New Icon pistons .060
Brodix RR heads 270ccx119cc
Int valve 2.250 Exh 1.88 dia.
new geometry recommended roller rockers-
still have the same stock aluminum 390 hp intake and a newer quadrajet I have been trying to get dialed in.
timing int @13 deg - 35 deg mechanical with vac advance 20-45 deg +-
TKX 5peed
I have read Cliffs book 10 times and still learning- I drilled idle tubes, channel restrictors and increased jet size/rods .077- .045 which as helped. I have been emailing Cliff as well for some thoughts.
No dyno in Nashville that do carbs anymore-I suppose I should get a GOOD AFR Kit or do I have a bag of worms on my hand with this carb and intake?
Any help/ thoughts would be great.
THX Mike
His email is v8fastcars@msn.com
Thread Starter
Racer
Joined: Feb 2010
Posts: 364
Likes: 10
From: nashville tn
Lars stated I needed to get AFR meter or have it put on dyno
Contact Lars Grimsrud who is the Quadrajet guru on this forum.
His email is v8fastcars@msn.com
His email is v8fastcars@msn.com
I did contact him. Sadly He passed on any type of help as I have a bag of worms with this set up.
Last edited by dntoearthman; Today at 09:34 PM. Reason: I did not give an accurate response
