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cam swap?

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Old Dec 6, 2009 | 09:28 AM
  #1  
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From: indiana
Car: 87 camaro iroc-z
Engine: 350
Transmission: 700r4
Axle/Gears: borg warner 3.27
cam swap?

is it possible to convert the roller cam to hydraulic tappet in an 87 l98? if so how much work would it be?

Last edited by jh7823; Dec 6, 2009 at 12:21 PM.
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Old Dec 6, 2009 | 03:51 PM
  #2  
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: cam swap?

Originally Posted by jh7823
is it possible to convert the roller cam to hydraulic tappet in an 87 l98? if so how much work would it be?
Why? Most want to go the other way for the superior roller cam
Need FT cam , FT lifters , new longer pushrods and regular ( non roller ) timing chain set.
Take the old out and bolt ones in
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Old Dec 6, 2009 | 09:58 PM
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From: chicago
Car: 87 GTA
Engine: 385 sbc
Transmission: 700r4
Axle/Gears: 2.73 posi
Re: cam swap?

dont do it, keep the roller cam,,,,, why down grade?
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Old Dec 7, 2009 | 06:00 PM
  #4  
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From: indiana
Car: 87 camaro iroc-z
Engine: 350
Transmission: 700r4
Axle/Gears: borg warner 3.27
Re: cam swap?

well its just the cam i have..i have a comp 268h-10..its 268 duration 218 duration at .050 .454 valve lift..compared to...404 and .415 lift 202 207 duration..i have new lifters and i need to figure out what pushrods any suggestions?
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Old Dec 7, 2009 | 06:25 PM
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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
I assume you mean going from hydraulic roller to hydraulic flat tappet.

Don't forget you'll need a different timing set.

My advice would be to sell the 268 and lifters and buy a hydraulic roller (unless your engine was severely abused or neglected, you can reuse roller lifters on a new cam).

If you insist on using the 268 and flat tappets, you need the longer stock push rods.
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Old Dec 7, 2009 | 07:15 PM
  #6  
jh7823's Avatar
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From: indiana
Car: 87 camaro iroc-z
Engine: 350
Transmission: 700r4
Axle/Gears: borg warner 3.27
Re: cam swap?

yea its hydraulic tappet..any ideas on how long of pushrods i will need? will ones from a sb that came with a tappet cam work?
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Old Dec 8, 2009 | 08:33 AM
  #7  
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From: chicago
Car: 87 GTA
Engine: 385 sbc
Transmission: 700r4
Axle/Gears: 2.73 posi
Re: cam swap?

dont forget youll need, flat tappet timing chain, very expensive flat tappet brake in oil (I would use it imo), new push rods, obviously new gaskets then you have to reassemble everything. So you spend 170 for the cam n lifters plus $35 for good break in oil(high zinc n phosphorus) plus $20 for pushrods so your at $225 plus alot of your own valuable time and now you have a less efficient valvetrain. Or for an extra $40 you can get a roller cam. Also is there any head work done to allow more lift than .470 ?
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Old Dec 8, 2009 | 05:37 PM
  #8  
jh7823's Avatar
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From: indiana
Car: 87 camaro iroc-z
Engine: 350
Transmission: 700r4
Axle/Gears: borg warner 3.27
Re: cam swap?

well the car is stock right now but the lift is only .454..im wondering how long of pushrods i will need..
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Old Dec 8, 2009 | 05:43 PM
  #9  
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From: chicago
Car: 87 GTA
Engine: 385 sbc
Transmission: 700r4
Axle/Gears: 2.73 posi
Re: cam swap?

you should measure for proper length but 7.794" should work for you
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Old Dec 8, 2009 | 08:47 PM
  #10  
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From: indiana
Car: 87 camaro iroc-z
Engine: 350
Transmission: 700r4
Axle/Gears: borg warner 3.27
Re: cam swap?

yea thats what i was thinking but just wasnt sure..well thanks for all your help
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