switch from normal to roller lifters
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Joined: Feb 2004
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From: St. Louis
Car: '86 Trans Am
Engine: stout 350
Transmission: automatic
switch from normal to roller lifters
Im building a 350 to put in my 86 trans am. I have heard that switching to roller lifters is one good way to add power to my setup. I was wondering what, if anything, i would need to change to get roller lifters to work. Any input would be appreciate.
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
If you use aftermarket roller lifters like Comps, then you don't really have to change anything to run them.
For the cam itself you will need a different cam gear, a cam button, and probably a bronze distributor gear depending on what cam you run. Consult your cam manufacturer.
For the cam itself you will need a different cam gear, a cam button, and probably a bronze distributor gear depending on what cam you run. Consult your cam manufacturer.
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Joined: Apr 2000
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From: E.B.F. TN
Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
More to the point, what exactly are you planning to do with the car? Mainly drive or race? If the first, don't waste your money, if the latter, you'll save money by getting the right block picked to begin with.
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Joined: Jan 2002
Posts: 1,322
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From: Bloomingdale,IL
Car: 91 RS
Engine: 305 Tbi (L03)
Transmission: 700r4
Even on the street roller lifters can make a big difference. The steeper ramps produce a flatter torque curve when used with a roller cam(not a racing one but a street one). With the aftermarket lifters you will need shorter pushrods.
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Joined: Jul 2003
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From: Lima, OH
Car: '89 Formula 350 & '86 Z28
Engine: L98 & 355ci
Transmission: 700r4 in both
Swapping form a hydraulic cam to a roller cam will generally cost you $1000..... you need a lot, its not as simple as swapping lifters
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally posted by 305sbc
... you will need a different cam gear, a cam button, and probably a bronze distributor gear depending on what cam you run.
... you will need a different cam gear, a cam button, and probably a bronze distributor gear depending on what cam you run.
Bronze distributor gears are only needed for full billet cams. The typical hydraulic retrofit roller cam won't require the use of a bronze gear.
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Joined: Feb 2002
Posts: 136
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From: Bradenton, FL
Car: 89 GTA
Engine: 5.7 TPI
Transmission: 700R4
The current Car Craft has an extensive section on cams with emphasis on the tappet vs roller debate. Most libraries prolly carry it if you really dont want to buy the issue.
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Joined: May 2001
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From: Pitman, NJ
Car: '89 IROC-Z
Engine: Canfield 195 headed 358ci
Transmission: TH350, Art Carr 9.5"
Axle/Gears: 3.92 Dana 44
I don't think its worth it to convert a non-roller block with a "retrofit" kit.... The $ to power ratio is way off. As said above, you can't just swap in some roller lifters, You'd need an entire retrofit kit that will put a huge dent in your wallet. I'd consider a solid flat tappet LONG before I thought about converting to a roller.
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