Carb for 406 sbc - Chevelle Tech
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post #1 of 26 (permalink) Old Jul 6th, 20, 10:43 PM Thread Starter
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Carb for 406 sbc

What carb will be suited for a 475 to 500 horse 406 SBC?

I have a 3310 I can use, but not sure if it would need more.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #2 of 26 (permalink) Old Jul 6th, 20, 11:05 PM
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Re: Carb for 406 sbc

Quote:
Originally Posted by Aaron View Post
What carb will be suited for a 475 to 500 horse 406 SBC?

I have a 3310 I can use, but not sure if it would need more.
My 406 that I just ran this year so fat I've used a 750, 850 and a 1000 cfm carbs. The best ET's were from the 850 Mighty Demon A/D carburetor.


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post #3 of 26 (permalink) Old Jul 6th, 20, 11:20 PM Thread Starter
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Re: Carb for 406 sbc

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Originally Posted by 68Chevele View Post
My 406 that I just ran this year so fat I've used a 750, 850 and a 1000 cfm carbs. The best ET's were from the 850 Mighty Demon A/D carburetor.
Its not getting on the track, but would need a good strong street carb.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #4 of 26 (permalink) Old Jul 7th, 20, 1:03 AM
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Kerry
 
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AED 950 HO would be my first choice.
750 HP street 82751 close second.
Unless you want a custom carb, jmarkaudio on here was going to be offering FST carbs but with his calibrations.
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post #5 of 26 (permalink) Old Jul 7th, 20, 1:36 AM
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Eric
 
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Re: Carb for 406 sbc

Since you've got the 3310, use it. You can turn it into a 800cfm by getting a main body HP conversion kit from ProForm or Holley. The HP main body also gets you adjustable air bleeds

Since you've got no plans for even moderately frequent track use, you'll never know or miss the possible 5-10 hp the bigger carbs might give you.

https://www.summitracing.com/parts/pro-67101c
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post #6 of 26 (permalink) Old Jul 7th, 20, 3:57 AM
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Re: Carb for 406 sbc

Id try jmarkaudio and get it perfect the first try.,
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post #7 of 26 (permalink) Old Jul 7th, 20, 6:13 AM Thread Starter
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Re: Carb for 406 sbc

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Originally Posted by Ericnova72 View Post
Since you've got the 3310, use it. You can turn it into a 800cfm by getting a main body HP conversion kit from ProForm or Holley. The HP main body also gets you adjustable air bleeds

Since you've got no plans for even moderately frequent track use, you'll never know or miss the possible 5-10 hp the bigger carbs might give you.

https://www.summitracing.com/parts/pro-67101c
Thanks, I had forgotten about this too.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #8 of 26 (permalink) Old Jul 7th, 20, 6:15 AM Thread Starter
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Re: Carb for 406 sbc

I also have a Holley 850 Vacuum Secondary too.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
Aaron is online now  
post #9 of 26 (permalink) Old Jul 7th, 20, 7:20 AM
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Re: Carb for 406 sbc

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Originally Posted by Aaron View Post
I also have a Holley 850 Vacuum Secondary too.
Man, that's the carb to use.
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post #10 of 26 (permalink) Old Jul 7th, 20, 7:36 AM
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Rick
 
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Re: Carb for 406 sbc

Freshen your 850 and use it.
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post #11 of 26 (permalink) Old Jul 7th, 20, 8:02 AM
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Re: Carb for 406 sbc

If your 3310 is an early one with downleg boosters, use it.

I built a garden variety 3310-1 for a friend 2 years ago for the 383 in his `66 Chevelle. It made 530+ HP on the dyno and is running mid 11's currently with a nitrous converter and rear gear (that's on the motor, he hasn't sprayed it yet).

I've also back to back tested a 3310-1 against a 950HP on a 500+ HP 302 small block Chevy on the dyno. Single digit power differences from 4K to 7500 rpm.

Simply put, the early 3310 carbs are some of the best units Holley ever made, they just need to be properly built & tuned.

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post #12 of 26 (permalink) Old Jul 7th, 20, 8:36 AM Thread Starter
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Re: Carb for 406 sbc

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Originally Posted by Vintage Musclecar View Post
If your 3310 is an early one with downleg boosters, use it.

I built a garden variety 3310-1 for a friend 2 years ago for the 383 in his `66 Chevelle. It made 530+ HP on the dyno and is running mid 11's currently with a nitrous converter and rear gear (that's on the motor, he hasn't sprayed it yet).

I've also back to back tested a 3310-1 against a 950HP on a 500+ HP 302 small block Chevy on the dyno. Single digit power differences from 4K to 7500 rpm.

Simply put, the early 3310 carbs are some of the best units Holley ever made, they just need to be properly built & tuned.
That Im not sure of.

Will have to check it out.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
Aaron is online now  
post #13 of 26 (permalink) Old Jul 7th, 20, 9:54 AM
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Re: Carb for 406 sbc

Hi

Quick fuel SS 780VS
more adjustable than most vs
CFM
401 cuin 6500rpm 100% VE = 754cfm

401 cuin ,, 6500rpm,,105 V.E. =790cfm

401 cuin ,,,6500,,,110% V.E. = 829 cfm
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post #14 of 26 (permalink) Old Jul 7th, 20, 12:25 PM
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Re: Carb for 406 sbc

Quote:
Originally Posted by Aaron View Post
Its not getting on the track, but would need a good strong street carb.
750hp, but if driving in cold weather than a 750 with a choke is a better choice.


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post #15 of 26 (permalink) Old Jul 7th, 20, 3:55 PM
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Re: Carb for 406 sbc

Aaron, Is the 406 a track motor or a street motor? How big is the cam and what heads you are using? What is the max rpm limit? How much the car weight?
What tranny are you using? What is the rear end gear ratio? Are you using a high stall converter if it is an automatic? All this will affect the size of a carb. 780 cfm was used 427 Yenko Chevelle. They put out over 500 HP.
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69 Chevelle Malibu Sports Coupe Change to SS
11:1 TR406sbc/AFR227/Comp cam 280HFT/3500 RPM Stall conv./TH 350/12 bolt 410 Gears
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