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Best cam for a 350 tbi

This is a discussion on Best cam for a 350 tbi within the Small Block forums, part of the Performance category; Whats the best mild cam for a currently stock 350 tbi that will still be a good daily driver...

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    Best cam for a 350 tbi


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    Whats the best mild cam for a currently stock 350 tbi that will still be a good daily driver

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    Registered User Doober's Avatar
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    Re: Best cam for a 350 tbi

    Do you have any other plans for it? What gears do you have? Sometimes that's an easier upgrade than a cam, and usually will feel a bit peppier in town. With any cam it will need a tune to run at optimum, but for what you're looking at, no other changes to drivetrain, etc., stay under 210@.050". TBI heads need a bit of work in order to breathe up top, so it won't do much good to get more aggressive on timing.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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    Re: Best cam for a 350 tbi

    Got the stock Z-71 gears which are 3.73 i believe. and do you know anywhere to get 4.56 gears online??

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    Re: Best cam for a 350 tbi

    summitracing but requires a new sized carrier for gears bigger then 4:10 because of ring gear being to big pushing out into the diff cover....

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    Re: Best cam for a 350 tbi

    do you have the link?

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    Re: Best cam for a 350 tbi

    Quote Originally Posted by Bbell View Post
    Got the stock Z-71 gears which are 3.73 i believe. and do you know anywhere to get 4.56 gears online??
    my stock Z71 gears were 3.42....just so you know
    Mrgreen89z71 likes this.
    1993 Chevy 5.7 tbi Z71, vortec heads, GMPP tbi vortec intake, 2" TBI and bored intake, TBI spacer, Comp Cams 08-409-8 XTREME 4x4 roller cam conversion, Hedman full length headers, 3" body lift, 33" tires, Paxton Performance tune (aka 94Blazer383), 4.10's, Hypertech powercharger, built 4l60e.

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    Re: Best cam for a 350 tbi

    well my axle dont have a tag and the numbers in the glove box are wore off so i cant tell.

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    Large Marge sent me SUBURBIAN's Avatar
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    Re: Best cam for a 350 tbi

    Saying you have Z71 stock gears is like saying you have the Z71 stock color, guys. This false Z71 bravado never ends. 2 ways to tell gear ratio now...remove the cover and count then divide the teeth on the ring and pinion or jack up the back of the truck, spin the tire, and count the driveshaft revolutions. They make ring gear spacers to run certain gears with other carriers....done all the time, just not recommended for extreme duty applications.
    Quyonmob likes this.

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    Re: Best cam for a 350 tbi

    Quote Originally Posted by SUBURBIAN View Post
    Saying you have Z71 stock gears is like saying you have the Z71 stock color, guys. This false Z71 bravado never ends. 2 ways to tell gear ratio now...remove the cover and count then divide the teeth on the ring and pinion or jack up the back of the truck, spin the tire, and count the driveshaft revolutions. They make ring gear spacers to run certain gears with other carriers....done all the time, just not recommended for extreme duty applications.
    The driveshaft does 4 turns to 1 turn of the tire. What's that telling me?

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    Large Marge sent me SUBURBIAN's Avatar
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    Re: Best cam for a 350 tbi

    It sounds like you could or most probably do have a 4.1X ring/pinion set...which is one of the numerous "stock" Z71 gear ratios.
    Mrgreen89z71 likes this.

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    Re: Best cam for a 350 tbi

    What ratio is that?

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    Re: Best cam for a 350 tbi

    A poorly marked one I bet. You are half way between gear ratios.

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    Re: Best cam for a 350 tbi

    And that means?...

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    Resident Dick Quyonmob's Avatar
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    Re: Best cam for a 350 tbi

    Quote Originally Posted by Bbell View Post
    And that means?...
    Means you should have come up just less than 4 (3.73) or just more than 4 (4.10).

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    Re: Best cam for a 350 tbi

    Well actually at EXACTLY one tire rotation the driveshaft had spun ALMOST 4 turns.

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    Re: Best cam for a 350 tbi

    I dunno about stock gears but I did see 4.11 stamped on my Yukons when they were put in. Do stockers have a stamping on the ring gear?
    1993 Chevy 5.7 tbi Z71, vortec heads, GMPP tbi vortec intake, 2" TBI and bored intake, TBI spacer, Comp Cams 08-409-8 XTREME 4x4 roller cam conversion, Hedman full length headers, 3" body lift, 33" tires, Paxton Performance tune (aka 94Blazer383), 4.10's, Hypertech powercharger, built 4l60e.

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    Re: Best cam for a 350 tbi

    What I've seen is a tooth count (i.e. 41-11, which would be 3.73) on the ring gear.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


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    Mr.RiverRat
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    Re: Best cam for a 350 tbi

    I'm curious about cams too. I have a 350 tbi stock besides exhaust and open Element air cleaner. I wanna run 3.73 gears and run vortec heads but stay with my tbi maybe a bigger one from SPR preformance.
    Any suggestions?

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    Re: Best cam for a 350 tbi

    I'm weary about doing a cam because ive heard you have to change the cam bearings and tuning seems like a pain in the butt

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    Registered User Doober's Avatar
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    Re: Best cam for a 350 tbi

    If you run an EBL like I do, it's actually quite easy, just time consuming. I understand burning chips isn't so bad once you get the hang of it, but I'd rather run an EBL for flash capability.

    So long as the cam bearings are in good shape you can likely reuse them, but if it has a lot of miles I would change them. A shop won't charge a ton to change them, but I don't know if you're getting that far into the engine.

    '92 Sierra (TBI 383/Vortecs/Comp 08-412-8/EBL/4L60/3.08s), '78 Malibu (Vortec'd 350/4-speed/2.29s), '87 Pontiac Fiero GT (2.8 v6/5-speed)


 

 
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