I need a cam for my new 413 sbc.
413 3.800 stroke x 4.155 bore
12.7 comp.
holley strip dom. intake
950 HP(gas)
pro1 230's 64cc with some port work. 1.52 rockers
cometic gask. (.048 quench)
flow for int.
.200 145
.300 197
.400 239
.500 273
.600 285
flow exh
.200 107
.300 156
.400 189
.500 211
.600 223
.700 229
1 3/4 to 1 7/8 step header.
4500 stall th350
4.33 gear with 28.5 tire
car is 3500lbs
car has been 10.76@124 with 355.
new 413 will see 250-300 shot of nitrous but will need to run good on motor also. i dont ask for much do I!!!LOL thanks for your help. howie

solid roller? ttt

yes. solid roller. sorry about that.

Howie,

I would normally put a 310/314R6 in your engine, it is perfect for it. However, with the 4.33 gears, it may need a little smaller cam, or are those for the nitrous?
Let me know, I'll try to answer while at home this weekend.

UDHarold

yeah 4.33 is for nitrous. thanks for the help.

would the 310/314R6 work with a gear change. or what cam would you guys recomend without gear change.

Why .048 quench? Try to tighten that up if you can.
.035 would on the tight side with .039-.040 playing it safe.
You can go tighter if all the parts are spot on.

left a little to go back on and deck if it torched a head gasket. but hope cometic's will never let that happen!LOL

Tighten up the quench if you can, it`s a win-win deal, better all around. .048 is not what you want

Howie,

You've built an engine that will go through the lights at 7500, if the gear/tire combo lets it.
You could go through slower, but the engine combo will do 7500. What size tire do you need to run with a 4.33 for 7300-7500 in the lights?
I assume you intend to run engine most of the time, and an occassional shot of NO2. The cam will handle that. You only need a special cam when you've got 400 HP+ in NO2, and you intend to run it all the time.
Let me know, I'll try to answer from work.

UDHarold