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Screw in studs.

broncoman6524

broncoman6524

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On my 383, I decided to tone down my camshaft to a .485 lift. I cannot afford to buy new springs and have them machined. :(

Joe (guy building my motor) told me that it is wise to install screw in studs on anything with a cam larger than a .450, if this is true. This cam will be pushing the stock studs limits, correct?
 
I usually suggest anything over .500" lift but with .485" lift you're pushing those limits and if you can afford it i would suggest having them installed. Nothing worse than trying to save a buck just to have it kick you in the ass down the road and cost you more than you thought you were saving.
 
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Did you notice in the write up of the Edelbrock cam the phrase, "Not recommended for trucks..."? If you decided to go that way, it would be a good idea to investigate that.
 
Put Vortec heads in my truck, broke a stock stud in less than 2000 miles. No idea why, lift is .454 max, spring rate only a bit higher than stock.

Ended up having to get new headgaskets which was the only other cost I remember besides new studs and machining for them, luckily nothing else was damaged when it came apart.
 
I have 350 that I built and sometime during the process the timing gears got turned out of sync and when we tried to fire it up it bent pushrods, then got it back in sync and it was pushing out two rocker studs.

So now I have a 350 bored .040 over, with cam, and re-machined heads with screw in studs. But then I changed my mind and went with a TBI motor.

now to find something to put this 350 in. :D

My cam was .453 lift exhaust and .432 intake.
 
broncoman6524 said:
Thanks bud, I gotta thank you for all of your help so far.:bow::bow:

I'm kind of liking this cam now. Still a higher rpm range but I don't plan on ever spinging it harder than 5K.
http://store.summitracing.com/partdetail.asp?part=EDL-5002&autoview=sku

Or this one seems to be a more reasonable choice. *Should* stilll have the lumpy idle but more streetable and suited.
249-12-239-3
249-12-239-3http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_44120_-1
Click to expand...

If you are not going over 5K RPM. Then why are you even looking at a cam good up over 6K? You need to realise that you are trying to get a big heavy truck with large tires moving. With a cam like that Edelbrock. It will just fall on its face unless you launch at 3K plus RPM. You need a cam that builds some low end torque.
The Comp cam you listed is far more sutable for a 383.
Also I highly recomend you get the correct springs for what ever cam you choose. Stock springs and high RPM valve float = Destroyed engine.
These are my opinnions.
I am not trying to be critical of your cam choices. I am just trying to save you some money and dissapointment.
Instead of just picking a cam and hoping it will work. Call Comp cams! Ask them what they recomend for your engine/head combo and what you want to do with the engine.. A simple call to 1-800-999-0853 may save you many headaches.
When You are building a performance engine you just cant skimp on parts.
 
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