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Old 11-01-2013, 04:41 PM
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Cam selection for 383 in a pickup.

I'm in the ordering phase of my first 383 stroker build. I am looking for an experienced cam recommendation.
I will probably rarely tow anything as it's a 2wd half ton but I would like to be able to if in need to. I'm ok with changing the stall in the converter as long as I won't get tons of heat if I tow a trailer.
Here's what I've got so far.
Four bolt main block bored .030 over and zero decked
Eagle cast 3.75" stroker crank
Chevy performance PM connecting rods 5.7" long (12495071)
Promaxx 2151 performance Vortec heads w/ 64cc chambers.
DSS racing forged -16cc dished pistons
I aiming for 9.8:1 compression and being able to run pump gas.
Thanks for the help.

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Old 11-01-2013, 05:50 PM
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Quote:
Originally Posted by Shaggyant View Post
I'm in the ordering phase of my first 383 stroker build. I am looking for an experienced cam recommendation.
I will probably rarely tow anything as it's a 2wd half ton but I would like to be able to if in need to. I'm ok with changing the stall in the converter as long as I won't get tons of heat if I tow a trailer.
Here's what I've got so far.
Four bolt main block bored .030 over and zero decked
Eagle cast 3.75" stroker crank
Chevy performance PM connecting rods 5.7" long (12495071)
Promaxx 2151 performance Vortec heads w/ 64cc chambers.
DSS racing forged -16cc dished pistons
I aiming for 9.8:1 compression and being able to run pump gas.
Thanks for the help.
I like this if there's going to be towing involved.
http://www.summitracing.com/int/part...make/chevrolet
Maybe a little conservitive in a 383....but should make lots of low end and be tow friendly
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Old 11-01-2013, 06:20 PM
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Or this with a Hughes 2500 converter
PN# GM2500
http://www.summitracing.com/int/part...make/chevrolet
And likely a tall "truck" tire so a set of 411's
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Old 11-01-2013, 07:35 PM
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What are your goals for the truck?What are you wanting out of it?Just cruisin,occasional strip,red light sprinter? Carb or EFI? Is the block a later model roller block?
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Old 11-01-2013, 07:41 PM
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Yah, I went on the assumption of a older non roller block and more street cruiser with some snot that could tow if need be....I shoulda asked more info first lol....
Those were both retrofit cams
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Old 11-01-2013, 07:42 PM
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The truck is an 84. I want to stick with a hydraulic flat tappet cam to keep my costs down. This truck will be 90% red light racer with 10% occasional strip time. I don't really plan on much towing but I need to be able to if I absolutely have to.
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Old 11-01-2013, 07:52 PM
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Quote:
Originally Posted by Shaggyant View Post
The truck is an 84. I want to stick with a hydraulic flat tappet cam to keep my costs down. This truck will be 90% red light racer with 10% occasional strip time. I don't really plan on much towing but I need to be able to if I absolutely have to.
Ahh, I see, then i hate to say it but stick an xe274 in it and call it good. They always seem to work well as an all around performer in 383's.....
A good 3000 stall, again, I like Hughes for off the shelf, PN# GM30, a big trans cooler and a set of 411's and your gold.
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Old 11-01-2013, 08:04 PM
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Ahh, I see, then i hate to say it but stick an xe274 in it and call it good. They always seem to work well as an all around performer in 383's.....
A good 3000 stall, again, I like Hughes for off the shelf, PN# GM30, a big trans cooler and a set of 411's and your gold.
That's the cam in my basket at Summit I'm just afraid a 3k stall converter is going to destroy my towing ability. I don't want my $$ 700r4 to spew the fluid out on the ground on the first big hill I get to.
Won't the 3k stall lead to a lot of fluid heat up? Especially if I'm pulling a trailer?
How is fuel mileage with a 3k converter anyway?
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Old 11-01-2013, 08:26 PM
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Originally Posted by Shaggyant View Post
That's the cam in my basket at Summit I'm just afraid a 3k stall converter is going to destroy my towing ability. I don't want my $$ 700r4 to spew the fluid out on the ground on the first big hill I get to.
Won't the 3k stall lead to a lot of fluid heat up? Especially if I'm pulling a trailer?
How is fuel mileage with a 3k converter anyway?
With a 700 that converter won't work anyways lol, I again, wrongfully assumed a 3 speed.....someone with a hell of a lot more trans experience with me will hopefully chime in soon. A quality 3000 stall with a deep pan and a big cooler would be fine in a 3spd, with the 700 I would think you want it on a toggle switch to lock the converter allowing it to not build heat while towing, but for some reason I think I may be wrong here....if your cam selection is sorted out maybe a new thread on "towing with a larger then stock converter" lol....
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Old 11-01-2013, 08:46 PM
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build the engine to perform as you want it to perform.cams dont know they are towing or in an airplane,they just open and close the valves.Pick one that matches your driving style.
Pick a transmission that works for the application and gears to match the cars purpose. If all thing are co-ordinated then the car/truck will be fun to drive. dont use a race vehicle for towing but you can race a tow truck
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Old 11-01-2013, 08:50 PM
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build the engine to perform as you want it to perform.cams dont know they are towing or in an airplane,they just open and close the valves.Pick one that matches your driving style.
Pick a transmission that works for the application and gears to match the cars purpose. If all thing are co-ordinated then the car/truck will be fun to drive. dont use a race vehicle for towing but you can race a tow truck
The problem is the torque converter stall. Are you saying the XE274 cam won't be a huge disappointment with a stock stall speed converter? If it won't be a boggy lagging pile with the stock converter then I may just try it.
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Old 11-01-2013, 08:56 PM
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the xe274 and any other flat tappet hydraulic cam is guaranteed to be a dissapointment
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Old 11-01-2013, 09:00 PM
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Another good choice that would make good power & very streetable is a Lunati VooDoo #10120703.The VooDoo cams,like the XE series cams get the valve open quik,however,they return it to the seat somewhat easier.Easier on the valvetrain than the XE's & quieter operation. Dur @ .050 =227/233. LSA/ICL=110/106. Lift=.489/504. With you current pile of parts & this cam,you get SCR of 9.82:1.DCR of 8.46:1. It needs 3:73 gears & a 2400 stall.With the 700R4 tho,411's would work even better.If you wanted to go a lil tamer,Lunati Bare Bones #10120101. Dur @ .050=214/224. LSA/ICL=112/107. Lift=.443/.465.
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Old 11-01-2013, 09:01 PM
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Originally Posted by vinniekq2 View Post
the xe274 and any other flat tappet hydraulic cam is guaranteed to be a dissapointment
Really? Why is that? If a roller is going to add that much I guess I could spring for a roller cam. What cam would you recommend? And will my tranny blow with a 3k converter towing?
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Old 11-01-2013, 09:14 PM
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A roller cam w/ the same specs will add approx 10 Hp,but,that's not the main benefit.With ZDDP being removed from most oils today,flat tappets won't last very long w/o using an additive with every oil change,IF,they survive break in.They also produce less heat & power robbing friction.You can swap cams w/o having to use new lifters w/ ea swap.
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