Where to start for jetting?

[Dirtfish]

Going to put the 4412 on the 318 in my mirada dirt car tomorrow. Trying to figure out where I need to be jet wise. 9.5:1 stock flat tappet 318 cam, 302 heads, Magnum manifolds, and dual plane Mopar 2 bbl intake. I know you can't guess spot on but can you get me close?
Thanks
Dillan

 

[Double M]

I would start with a pair of 75 jets. Watch your plugs and fine tune from there. You'll probably end up with about a 72 or 73. Have fun, turn left.

Forgot to ad, what's the altitude and how big is the track. It matters.

Russ.

 

[teringer]

you will end up some where between 68 /72 your not running headers right and low compression? If I remember right 68 is stock. on the 500 2-barrel .

 

[Dirtfish]

Headers and high compression don't make the rules. 3/8 of a mile semi banked clay oval

 

[teringer]

what spark plugs did you go with /heat range /are you running a alternator

 

[Double M]

Headers and high compression don't make the rules. 3/8 of a mile semi banked clay oval

You'll probably end up with a 73 or 74 jet. If the cam you're using is hydraulic, use 273 push rods and adjustable rockers right at zero lash. Alway remember this. On the small tracks, the tech officials usually don't even know how to spell MOPAR. Have fun.

Russ.

 

[AJ/FormS]

Me likey Zero lash. Me likey 7200rpm.

 

[j par]

I was kind of thinking turn right and floor it to go left?

 

[Double M]

I was kind of thinking turn right and floor it to go left?

Just like Doc Hudson was trying to tell Stickers!!

Russ.

 

[Blue Grey Duster]

Just like Doc Hudson was trying to tell Stickers!!

Russ.

X2