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Old 08-04-2011, 09:55 PM   #1
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Car: 1990 Formula, 1989 Mustang LX
Engine: Stock TBI 305, Built 302
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LT4 cam card

Does anybody have the actual cam card for the LT4 hot cam? I'd like to see the specs for it for another project of mine. Thanks in advance.
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In the near future: 4th gen rear w/ 4.10s and an Eaton Posi, Spohn K-member braces, Wilwood rear discs
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Old 08-04-2011, 10:40 PM   #2
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Re: LT4 cam card

http://www.thirdgen.org/techboard/te...ve-actual.html (Does anyone have an actual CAM CARD for GM's LT4 HOT cam??)

Seen this posted
Quote:
I've taken these specs off a H.O.T. cam sample - the .050" duration is 219.1/229.3 deg, .100" duration is 187.7/197.0 deg, the .200 duration is 135.8/143.1 deg, the actual .050" valve timing is: Intake opens at .3 deg BTDC closes 38.8 deg ABDC, the exhaust opens at 49.1 deg BBDC and closes .2 deg ATDC
This cam tested measured 112.3 deg lobe separation angle, Intake centerline was 108.7 deg. Hope this helps, Dr HP
DD2003 confirms those are close, at .050"

IVO 0.5 deg BTDC IVC 38.5 ABDC
EVO 49 deg BBDC and EVC -1.0 ATDC
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Old 08-05-2011, 09:22 AM   #3
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Re: LT4 cam card

I think that this is the same hot cam. Double check the part number as it is only listed as the 'hot cam'.

RBob.
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Old 08-05-2011, 11:02 AM   #4
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Re: LT4 cam card

Might be doing this cam swap next year. have not decided for sure yet. deffinately an option
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Old 08-06-2011, 09:59 PM   #5
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Car: 1990 Formula, 1989 Mustang LX
Engine: Stock TBI 305, Built 302
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Axle/Gears: 4.10, 4.10

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Re: LT4 cam card

Thanks a bunch guys, this will really help.
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1990 Formula Firebird: Spohn RCA's, Spohn track bar, Spohn sway bars, Spohn wonder bar, Moog rear coils, KYB shocks and struts, American Racing Outlaw 1s, TA power bulge air cleaner, Black Z20 spoiler

In the near future: 4th gen rear w/ 4.10s and an Eaton Posi, Spohn K-member braces, Wilwood rear discs
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Old 08-06-2011, 09:59 PM
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