LT1 cam specs

[kenwa]

Anyone know the complete cam timing specs for the stock 1996 LT1 cam?

Thanks,
Ken

 

[SG4206]

Go to GMpartsdirect.com for specs. Click on performance ,small block , reference chart.
Hope this helps -

 

[Vettelt193]

LT1:
valve lift @.050:
intake: .447
exhaust: .459

lobe lift: @.050:
intake .298
exhaust: .306

Duration: @.050
intake: 205 deg
exhaust: 207 deg

lobe separation: 117 deg

LT4:
valve lift @.050:
intake: .476
exhaust: .479

lobe lift: @.050:
intake .298
exhaust: .299

Duration: @.050
intake: 203 deg
exhaust: 210 deg

lobe separation: 115 deg

These numbers are LT1 with 1.5 rockers, LT4 with 1.6 rockers

 

[kenwa]

Go to GMpartsdirect.com for specs. Click on performance ,small block , reference chart.
Hope this helps -

Thanks for the info, everyone. I'm looking for more specifics though. I'd like the valve opening and closing event timings, particularly the intake closing @ .006". I tried GMpartsdirect.com which indicated that Crane makes GM's replacement cams. I called Crane and they make some, but not the LT1.

Any more ideas?

Ken

 

[Mad-Mic]

what kind of cam are you looking for? specifics as in more HP or a stock replacement?

 

[kenwa]

Mic, right now the info won't have an immediate impact on the Vette. I'm actually building a 396 for a friend's 69 Chevelle and I am pushing the compression ratio fairly high on it (10.5:1, but with healthy cam). This puts the dynamic compression ratio at 7.9, accounting for the late intake closing. My LT1 has 10.5 compression, but with a mild cam, so I was wanting to know what it's DCR is as a reference. Thus, I need to know when the LT1's intake closes past BDC. The rest of the cam timing events would be a bonus. In general, I like to know as much about the Vette as possible.