95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Who has put cams in their 3vze?

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Old May 14, 2005 | 08:16 AM
  #21  
ChaseHeadrick's Avatar
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From: Boise, Idaho
im still working on getting it to idle right, but i don't think its the cams yet. theres a leak somewhere, be it exhaust or vaccum. im working on it this morning to fix it. as far as the stock cams go im not sure.
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Old May 17, 2005 | 02:45 PM
  #22  
ChaseHeadrick's Avatar
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From: Boise, Idaho
FWIW, my cam specs are as follows:
Intake & Exhaust:
Lobe Center sep: 107.6* (cam)
Valve overlap: 7* (crank)
Intake:
Valve opening: 3.5* BTDC
Lobe center: 107.4* ATDC
Valve closure: 38.5* ABDC
Duration: 222* (crank)
Lift: .40161"
Lobe 'area': 30.71
Exhaust:
Opens: 40* BBDC
Lobe center: 107.8* BTDC
Closes: 3.5* ATDC
Duration: 223.5* (crank)
Lift: .40205"
Lobe 'area': 30.93

sorry i forgot to get the factory cam specs. maybe tomorrow.
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Old May 23, 2005 | 08:37 PM
  #23  
Bumpin' Yota's Avatar
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From: Sarasota, FL
I've done a bit of research on cams and wanted to dispell a few things...I still dont know about 'grind numbers' but I do know that in conventional pushrod engines the duration is measured in degrees of crank angle, not cam angle. And cams must be taylored to the head specificially weather it's been ported or not. (this is why I desperately want the pre and post porting flow numbers on the 3vze heads - it will let me know if it's worth it)

Originally Posted by ChaseHeadrick
FWIW, my cam specs are as follows:

Intake & Exhaust:

Lobe Center sep: 107.6* (cam)

Valve overlap: 7* (crank)

Intake:

Valve opening: 3.5* BTDC

Lobe center: 107.4* ATDC

Valve closure: 38.5* ABDC

Duration: 222* (crank)

Lift: .40161"

Lobe 'area': 30.71

Exhaust:

Opens: 40* BBDC

Lobe center: 107.8* BTDC

Closes: 3.5* ATDC

Duration: 223.5* (crank)

Lift: .40205"

Lobe 'area': 30.93



sorry i forgot to get the factory cam specs. maybe tomorrow.
DUDE YOU RULE!! Got the factory cam specs?

Last edited by Bumpin' Yota; May 23, 2005 at 08:38 PM.
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Old May 24, 2005 | 04:03 AM
  #24  
ChaseHeadrick's Avatar
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From: Boise, Idaho
sorry i dont have them. i'll see if i can get them though.
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Old May 24, 2005 | 05:28 AM
  #25  
Bumpin' Yota's Avatar
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From: Sarasota, FL
cool thanks man.

Lobe separation is right there at 107.6 with duration of 222/223. Hmmm street manners, good vacuum, and better bottom end power were the order huh?

The duration just seems low to me...maybe I'm used to looking at pushrod cams...LOL Has the duration been reduced at all?
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