Holley 3310 Jets

[71_Duster]

Going to try out a 3310 in my 440 in my Belvedere. Looking for some jet recomendation to start with.

Altitude is 2200FT above sea level.

Edelbrock Performer RPM HEADS & intake
Hughes rocker shafts
Hughes CAM-HEH 2832BL

Camshaft Technical Details
Intake Valve Lift 1.5
Exhaust Valve Lift 1.5 .524"
.540"

Intake Valve Lift 1.6
Exhaust Valve Lift 1.6 .558"
.576"

Intake Duration at .050"
Exhaust Duration at .050" 228°
232°

Lobe Separation Angle 110º

Intake Opening at .050"
Exhaust Opening at .050" 7° BTC
49° BBC

Intake Closing at .050"
Exhaust Closing at .050" 41° ABC
3° ATC

 

[Garys1969RR]

I am running a 3310 in my 69 RR. 3600 lbs, 451 cubic inches, 13 to 1 C/R, 915 ported heads, 3.91 gears. Holley street dominator intake. MP 509 cam. 242 duration@ .050. 3000 RPM stall converter, 5600 feet. Headers. Runs 12.58@109 MPH 1/4 mile. I am using 72 primary, 80 sec jets. 4.5 power valve. More airflow usually needs larger jets. We need specifics on your combo, like engine size, C/R, gears, etc.

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Are you running headers and a good ex system?

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Stock jetting is 72 primary, 76 secondary. 6.5 power valve front and rear.

 

[71_Duster]

TTI Headers with x-pipe and a full TTI exhaust system, it's a 440 bored .30 over with CP Hyperutectic pistons unsure of the actual compresson ratio.

3.23 gear. I'm short on stall right now only 2000rpm but with plans to fix that.

 

[MikeyT]

This is a stab in the dark, but that was similar to my first 440 build.. It performed best at 76/82 with a 6.5 pwr valve and 31 shot...

If you have a track near you, this can be a lot of fun. Start at base jet and keep going up increments of 2 as your mph goes up, once you hit the highest or start to slow down mph wise, that is your jetting..

To figure out power valve start with highest vacuum gauge reading decided by 2, so if you read 14 hg take that divide by 2 =7, since they don't make a 7 power valve, you round down to in this case 6.5.

The 509 is not know for high vacuum readings so 4.5 is going to be my guess

Good luck
Mikey

 

[Garys1969RR]

Always start with stock jetting and work from there, as Mikey said. 71 Duster is running a Hughes cam, 69 RR has the 509 cam, which does work well with the 4.5 power valve.

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I think anywhere from stock to 2 steps richer would be about right for you, Duster. I went 4 steps richer in secondary, (76 to 80) because a richer mixture will tend to reduce chances of ping and detonation. And I am running 13 to 1 C/R, with 100 octane fuel. Remember at 5600 feet you can use more C/R than at 2600 feet. All other factors being equal. Every engine is different. Reading the plug color will give a good indication of where your at.