LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

thoughts on this cam, need expert advice

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Old Jan 16, 2006 | 08:31 PM
  #1  
1quikZ's Avatar
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From: Oshawa, Ontario, Canada
thoughts on this cam, need expert advice

intake .573 and exhaust of .594

Lobe center sep = 114.6 cam deg
vavle over lap = 6.7 crank deg

Intake

valve opening = 3.4 before top dead center
lobe center = 111.5 at top dead center
valve closure = 47.2 abdc
duration = 230.6 crank deg
max cam lift .35819 inches
net valve lift = .5731 inches
lobe area = 28.51

Exhaust

valve opening = 59.1 BBDC
lobe center = 117.6 BTDC
lalve closure = 3.4 ATDC
duration = 242.4 CRANK DEG
max cam lift = .37138 INCHES
net valve lift = .5942 INCHES
lobe area = 31.02

I am building a Carb'd LT1 engine for my '88 IROC and was wondering how you think this cam would suit? How much flywheel HP and TRQ with headers and Gm intake with unported heads?

Last edited by 1quikZ; Jan 16, 2006 at 08:59 PM.
Old Jan 17, 2006 | 10:46 AM
  #2  
SStrokerAce's Avatar
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Re: thoughts on this cam, need expert advice

Do I count?

Too much LSA (not enough overlap) and too much exhaust duration.

Cam Dr numbers?

Bret
Old Jan 17, 2006 | 02:40 PM
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Firehawk_Dude's Avatar
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From: Tinley Park, IL
Re: thoughts on this cam, need expert advice

Originally Posted by SStrokerAce
Do I count?
I would say so...
Old Jan 17, 2006 | 05:56 PM
  #4  
1quikZ's Avatar
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From: Oshawa, Ontario, Canada
Re: thoughts on this cam, need expert advice

Originally Posted by SStrokerAce
Do I count?

Too much LSA (not enough overlap) and too much exhaust duration.

Cam Dr numbers?

Bret

Hmm "do I count" from the "Cam God" lol

Ok, so in words i comprehend, ie more or less extreme than the cc306? I want a streetable cam with a rev band that makes power up top, is this what im looking for? Exhasut duration means "mean" idle correct?
Old Jan 17, 2006 | 09:52 PM
  #5  
SStrokerAce's Avatar
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Re: thoughts on this cam, need expert advice

It's basically the same as a CC306 with more lift.

Lobe center sep = 114.6 cam deg
vavle over lap = 6.7 crank deg
If you lower that Lope Center Sep number the valve over lap number will increase which is what I was talking about. This is also what gives you a mean idle.

I just put together a LS1 today and gave it a warm up test drive and it had a ton more overlap than that ( about 2 times as much ) and with a stock tune drove fine.

Bret
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