Lt1 1970 Cam Specs ??? - Team Camaro Tech
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Old Sep 11th, 06, 01:45 PM
ERHARD ERHARD is offline
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Default Lt1 1970 Cam Specs ???

Does anybody know the cam specs for the 70 lt1 350 as compared to the 69 z28 30 30 cam.
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Old Sep 11th, 06, 02:06 PM
Gary L's Avatar
Gary L Gary L is offline
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Default Re: Lt1 1970 Cam Specs ???

Per Zdld17:
Ok here are the specs for GM off road cams :

# 3927140 1st optional
Lift @0 lash Int .492, Ex .512

Valve timing:Intake
Open btc 53*
close abc 100*
Duration 333*
lash .022

open @bbc 101*
closing @ atc 65*
duration overlap 346*

2nd optional # 3965754
Lift @0 lash
int .512
exh . 536

Valve timing Intake
open btc 49*
close abc 95*
duration 324* lash .022
overlap 105*

open bbc @ 98*
close atc @ 56*
duration 334* lash .024

Forgot to add the newer Lt1 Cam 3972178

Lift @0 int .458, exh .485

Int valve timing
open btc 42* @ .040
clos abc 94* @ .020
duration 317*
lash .024

exh timing
open bbc @ 112* @ .050
close atc 53* @ .023
duration 346*
lash .030

The stock 302 cam 3849346
lift .485/.485

valve timing
int open btc 60*@ .040
close abc 105* @ .023
duration 346 @ .013

exh :
open bbc 108* @ .050
close atc 57* @ .023
duration 346 @ .030

lash 30/30
"Government is not reason; it is not eloquent; it is force. Like fire, it is a dangerous servant and a fearful master." ..... George Washington

Gary,TC Member with a Lemans Blue/Ivory 02D X33, DZ, M20, MS, flat hood. Only the BU code rear end is original.
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Team Camaro Tech > First Generation Camaro Info and Tech - 1967- 1969 "Where it all started" > Engine      Current Topic: Lt1 1970 Cam Specs ???
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