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Discussion Starter · #1 ·
I'm about to rebuild the top-end of my sb 400 and I'm not sure what cam is best for me. This is for a street/strip and pump gas car (3,430 lbs) that I would like to see in the low-mid 12s. I'm going to buy a set of AFR 195/65cc heads and Comp's Pro-Magnums roller rockers. I've been told the Voodoo 60104 is a great cam, but is it big enough to reach my goal? If not what cam would you suggest?

http://store.summitracing.com/partdetail.asp?part=LUN-60104LK&autoview=sku

Here's my current combo:
-sb 400 block over 0.040 (408).
-9.5:1 compression ratio (with stock 76cc heads and flat-tops.)
-World S/R Torquer cast iron heads 170/67cc.
-Crane Energizer cam, The part # is 100072.
228/228 duration @ .050, 480/480 lift and 284/284 adv duration, 112 LSA.
-Edelbrock RPM Air Gap Intake manifold.
-Long tube Flowtech headers.
-Carter AFB competition series 750 cfm carb.
-MSD 6A box.
-MSD plug wires.
-Turbo 400 trans.
-Hughes Performance 2,500 stall.
-2 1/2" full exhaust,H-pipe, Flowmaster 40s.
-12 bolt posi rear, Richmond 3.55 gears, Eaton carrier.
 

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What were your best times ?

I think your heads kept you held back,and a little bigger cam should do it. If you are buying new heads, get a smaller combustion chamber to get your compression up to about 10-10.5:1. My old combo was at 9.5:1 with stock heads (home ported) and best I went was 13.2 @ 103. Head swap only and with some tunning went 12.3 @ 110.
My combo was
406ci
10.17:1 comp
Vic Jr. intake
750dp Holley (list 4779-6)
200cc Protoplines (box stock)
280H Compcam (.486 I/E , 230 @ .050)
th350 w/ shift kit
3.73 gears
27.5" tall McCreary's

times below.
 

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Ok, I see you rated the comp at 9.5 with 76cc but are running 67cc which would give you about 10.25:1 or so, good place to be.
 

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Discussion Starter · #4 ·
My best was E.T. was 14.8 @ 89.06 mph with 2.3 in the 60'. My best MPH in the was 94 with a 15.2 E.T. with a 2.6 in the 60'. I have major traction problems...BFG radial T/As.

As a rule of thumb, is every 10cc in combustion chamber size worth about one point of compression?

Is the Voodoo 60104 the right choice? I've been told my current Crane cam is an older style grind and isn't comparable to what's on the market now.
 

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I can't believe you didn't do better, even on street radials. It takes a lot of practice to launch on street radials and if you have good track prep it easier.
That motor should have pulled 100mph easy

yes, 10cc = about 1 point.
 

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You should be low 13's high 12's now with your combo.So tunning now would be cheaper than throwing money and parts at it.
 

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Yes, that cam in your motor with better heads will run low 12's but only if properly tuned, there's traction to be had, you hit all your shift points,and you're geared properly.

Otherwise,no traction,left it in drive,wrong gears,and un-tuned...who knows :confused:
 
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