Cams

[VictoryRed]

Moving to a larger ratio "kinda" changes duration. You'll get to .050" faster, and your valve opening under overlap will be larger.

one last question what kind of valve springs and retainers would you recommend? Im thinking ls springs but i need to know which retainers would work with my valves

 

[L31MaxExpress]

so what would be the largest i could go without an annoying amount of low end torque loss and could things like headers get me a noticeable amount of low end back if i did go the stupid route and put in a big cam?

WIth a stock torque converter and stock rear gear about a 210 @ 0.050 on the intake lobe. 220 @ 0.050 will also work but really needs a 2,500 rpm converter and deeper gears.

 

[VictoryRed]

WIth a stock torque converter and stock rear gear about a 210 @ 0.050 on the intake lobe. 220 @ 0.050 will also work but really needs a 2,500 rpm converter and deeper gears.

so duration matters more than lift is my takeaway right now am i correct or no

 

[PlayingWithTBI]

I used this roller cam in my 88 5.7L (still have it sitting on the shelf), I could get it idling nice at ~750 RPM but, you could tell it wasn't stock. Still had enough vacuum for my brakes too.

COMP Cams 08-430-8 COMP Cams Magnum Hydraulic Roller Camshafts | Summit Racing

Free Shipping - COMP Cams Magnum Hydraulic Roller Camshafts with qualifying orders of $109. Shop Camshafts at Summit Racing.

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Comp cams suggested I use CCA-986-8 springs. With my heads, I had to use CCA-4770-8 Locators. For retainers I used their CCA-743-8. I know some folks used "beehive" springs too. Just give your cam company a call and ask them. YMMV

 

[L31MaxExpress]

so duration matters more than lift is my takeaway right now am i correct or no

Correct, duration, intake closing point, exhaust opening point and overlap are the biggest things that matter for low-end torque.

 

[PlayingWithTBI]

duration, intake closing point, exhaust opening point and overlap are the biggest things that matter for low-end torque.

And achieving a "Lopey Idle" but, not both

 

[L31MaxExpress]

Then again power brakes are a non issue with any cam. Either add the $100 GM Cadillac SRX vacuum pump or convert to hydroboost. Then again if you actually drive a hydroboosted vehicle sometime, you will never want to drive one with a vacuum booster again.

 

[L31MaxExpress]

And achieving a "Lopey Idle" but, not both

I can achieve both. Cam like a Crane 274H06. Tight LSA and short duration. Nice chunky idle, instant throttle response and good off-idle torque.

 

[VictoryRed]

I can achieve both. Cam like a Crane 274H06. Tight LSA and short duration. Nice chunky idle, instant throttle response and good off-idle torque.

just watched a few videos on that cam and that’s the exact amount of lope i’m looking for i think i’ll go with that nevermind they went under that sucks

 

[RacerM95]

Look at Comp Cams, been using their 280H for decades.. dang good cam....