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need cam for mud truck

11K views 31 replies 7 participants last post by  chevrolet327 
#1 ·
i have tried a comp cam x4270h but im really not happy with the performance
so i will try another cam and need help for choosing the best one here my setup cut-box chevy k20 dana 60 14 bolt axle 4.10 ratio 40 inch tire th400 np205 t-case
350 flat top l2256 piston
vortec head gm performance intake
12-243-3 comp cam
edelbrock 750
stock torque converter
long tube open exhaust

i run the truck always on low gear
 
#5 ·
comp web sight suggest that you would use a 2200 stall converter with that cam. I would think that you would have a lot more power that you say you do. Did you install it straight up. (stock timing marks). You might want to double check your cam timing. Those cams run pretty well at 4 degrees advanced if I remember right. Maybe some one else will remember for sure.
 
#9 ·
I also will agree it needs a bigger stahl probably around a 4000 stahl would be about right. I also agree on needing more gears. I also mudd bogg and I have 35 inch tires but I run a dana 300 transfer case behind a turbo 350 and I have 410 gears you definatley need something in the low to mid 5's to make them turn
 
#14 ·
no you will need to get a different carrier. the carrier you have is probably stock and you will need something better. the stock carrier will probably on handle gears up to 456 If I was you I would run a full spool. Here are a couple of numbers you can call to check on the gears Randy's Ring and Pinion 1 877 349 1369 and west coast Differentials 1 800 446 0950.... They may also have full spools but I don't know
 
#19 ·
I don't think its a solid roller then- mayb eits just a solid flat tappet. .450" at the valve isn't really in solid roller territory unless you need EXTREEMLY fast opening ramps for restricted circle track racing even then though going with a higher rocker ratio would make more sense.
 
#22 ·
It may be- if that is the case though you won't gain anything by it. Its like stepping from a Buick 455 to a nailhead- you're going the wrong direction.

You need to look at a higher stall first- you'll be AMAZED at how much an extra 1500 stall can do. going from a stock conv. to a 3000 or a 3500 can wake up almost any engine.
 
#26 ·
Its a very torquey cam shaft, great for street, but in your heavy viehicle and higher compression it may ping- if you run premium and keep it in first with that 3000 Stall you'd probably be safe though.

Voodoo's require a very close attention to detail though, their agressive ramps can wipe out fast fi you're not careful.
 
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