All the updates listed in this thead, and also the ones that have been emailed to me have now been applied in the first post in this thread. Thanks to everyone for helping to get all the information together!
Wow, I never realized there were so many cams available to the 3800 community; I don't want to hear anyone say they can't find a cam that suits their needs for their 3800!
Of all these cams do you know, and can you note which of them are regrind cams (having a reduced base circle from the stock size) ?
As a few people over here with the standard lifters and rockers are having noise issues and would prefer the option of knowing if the base circle has been changed.
If I replace the cam I don't want a regrind (reduced base circle from stock).
Of all these cams do you know, and can you note which of them are regrind cams (having a reduced base circle from the stock size) ?
As a few people over here with the standard lifters and rockers are having noise issues and would prefer the option of knowing if the base circle has been changed.
If I replace the cam I don't want a regrind (reduced base circle from stock).
ARH Naturally Aspirated cam
-210/220 @ .050
-.320" lobe lift on the intake, .512 with a 1.6 rocker ratio
-.320 lobe lift on the exhaust, .512 with a 1.6 rocker ratio
-112 lobe separation
ARH Turbo/Blower cam
-220/220 @ .050
-.320" lobe lift on the intake, .512" with a 1.6 rocker ratio
-.320" lobe lift on the intake, .512" with a 1.6 rocker ratio
-114 lobe separation
The L67 & L36 cams are the same cam, no difference in the camshafts.
BUT
There is a 5° advance difference in the L67 & L36 camshaft gear keyway positioning.
I recently did an Inlet only degreeing of the stock camshaft in a L67 & then fitted the L36 camshaft gear & did it again.
The results were:
@ 0.050" using the L67 camshaft gear -
Inlet opened @ 22.5° After Top Dead Centre
Inlet closed @ 27.0° After Bottom Dead Centre
Inlet centre line was @ 114°
@ 0.050" using the L36 camshaft gear -
Inlet opened @ 27.5° After Top Dead Centre
Inlet closed @ 32° After Bottom Dead Centre
Inlet centre line was @ 119°
If you add up the opening & closing you get 184.5°
Which is very close to the 182° we have seen posted for the L67 & L36 cam specs.
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