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choosing cams

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Old Feb 16, 2009 | 09:07 PM
  #1  
88_firebird_TPI's Avatar
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choosing cams

hey,

i was lookin into getting some cams for my 88 firebird formula TPI and i was thinking of getting these

http://store.summitracing.com/partde...rsview=sku&Ns=

Will this be alright on my car, or not a good idea, because my car is almost completely stock except for the exhaust

Last edited by 88_firebird_TPI; Feb 25, 2009 at 09:18 AM. Reason: cuz i like to edit
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Old Feb 16, 2009 | 09:43 PM
  #2  
fast82z's Avatar
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From: NE Ohio
Car: 82 Z28
Engine: TT LS
Transmission: 4L80E
Axle/Gears: S60 3.54's
Re: choosing cams

With your setup, that cam will not work in the least. First thing you'll notice is stock heads can only take so much lift, probaly around .470" or so. After that, the car would need a tune probably even before first start up. There's other reasons too, but it's just easier to say it needs something smaller. If you want the biggest cam possible, it'd be best to take a couple valve springs out and see how far the valves can possibly move and get a cam with somewhat less lift than that. Other options would be to have the heads machined to clear more lift, get a different set of heads that already can take more lift, or just get a cam with .450" or less lift. That last option is the cheapest/easiest, and would still likely get you .25 in the 1/4.
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Old Feb 16, 2009 | 10:11 PM
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305sbc's Avatar
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: choosing cams

This is what you want.
http://www.lingenfelter.com/mm5/merc...egory_Code=C30

Part Number: L210025087
Lingenfelter 74216 Camshaft L98, LT1, LT4 1987 - 96 TPI - Hyd Roller 213/219 .493/.502 HR112

You'll need to upgrade the valvesprings and use different retainers. Vortec retainers will work if you use conventional springs.
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