Intake and Carb help

[silver00v6camaro]

I need some advice on a carb and intake and torque converter. Currently i have a 600cfm holley 4160 but I do not think it is enough to get the job done. Comp cams says to ues a big carb for my cam. here is my specs on the cam. my motor is a small block chevy 350 bored over .30 with 10.5:1 compression. Car is a 75 auto with a th400.

Part Number 12-512-5
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS280TLS-6
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0.018 0.018
Gross Valve Lift 0.53 0.55
Duration At 0.02 Tappet Lift 280 288

--------------------------------------------------------------------------------

Valve Timing At 0.05
Open Close
Intake 19 51
Exhaust 56 23

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 250 259
Lobe Lift 0.3534 0.3667
Lobe Separation 106

--------------------------------------------------------------------------------

Recommended Valve Springs 986-16

This is what the guys used when they built my motor it was purchased as a kit so the question is what cfm carb do I need and what is a good one to go with.

 

[JohnZ]

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 250 259
Lobe Lift 0.3534 0.3667
Lobe Separation 106

Recommended Valve Springs 986-16

This is what the guys used when they built my motor it was purchased as a kit so the question is what cfm carb do I need and what is a good one to go with.

Others can advise you on carb sizing, but that's an AWFUL lot of cam for a street engine - extreme lift and duration, and no low-end torque with a 106* LSA. If that's the cam you wanted, that's fine, but it's not going to be very streetable.

 

[waterboy1976]

Its a lot of cam but it dependes on what RPM range youre at....my setup has:

350....40 over
2.02/1/94 heads.....64cc chamber 180 cc runner
10.32/1 compression

cam....234/244 durat @.50
.510/.544 lift
108 lsa

My carb....Mighty demon....650.........

4speed muncie.....runs like a bat out of hell....loves 4500 to 5500 rpm.....

Your carb should be a 644 cfm....so from my calculations you should be at least a 650....no real need for a 700 or bigger......dont OVER carb it....

Im sure someone else will chime in here too...

 

[pws69]

I would definitely put a Holley 750 Double Pumper on that engine/build. You won't believe the difference from the 600!

I need some advice on a carb and intake and torque converter. Currently i have a 600cfm holley 4160 but I do not think it is enough to get the job done. Comp cams says to ues a big carb for my cam. here is my specs on the cam. my motor is a small block chevy 350 bored over .30 with 10.5:1 compression. Car is a 75 auto with a th400.

Part Number 12-512-5
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS280TLS-6
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0.018 0.018
Gross Valve Lift 0.53 0.55
Duration At 0.02 Tappet Lift 280 288

--------------------------------------------------------------------------------

Valve Timing At 0.05
Open Close
Intake 19 51
Exhaust 56 23

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 250 259
Lobe Lift 0.3534 0.3667
Lobe Separation 106

--------------------------------------------------------------------------------

Recommended Valve Springs 986-16

This is what the guys used when they built my motor it was purchased as a kit so the question is what cfm carb do I need and what is a good one to go with.

 

[AUSSIEVETTEMAN]

One word.......Edelbrock!

Forget Holley, I used the new 650 Holley as a boat anchor. Holley carbs are for boy racers. If you want a good carb, the Edelbrock Qjet is the only way to go apart from injection.

We put one on our L81 and it came alive!

You will not be disapointed, remember more airflow = more HP & Torque

Cheers

Tony