Anybody running the '68 4 speed 340 cam?

[Illahe]

Its a free world. If someone wants to spend double for the supposed 1 degree that's fine. The point is that informing other members that the cam is already available (lots of threads on it) is fine too.

My understating of the discussion is that the members are discussing "lobe profile," and not simply one degree of duration. Ken is a great Cam Grinder with vast knowledge, but he is constrained to his "pattern catalog." I've visited the shop in Vancouver, and they are well equipped, but, carry "their own concept" of lobe profiles.

I'd be happy with the results you have achieved. Some of us (me) are constantly seeking maximum efficiency from a pattern and have chosen "Chrysler" specific shops that have many years of eking out the most from the .904 lifter and its capacity to follow an aggressive ramp, broad nose and fast closing rate.

These "patterns" are not found in your average hydraulic profiles...

Post up a sound byte for us when you have a chance and happy motoring!

 

[1MeanA]

My understating of the discussion is that the members are discussing "lobe profile," and not simply one degree of duration. Ken is a great Cam Grinder with vast knowledge, but he is constrained to his "pattern catalog." I've visited the shop in Vancouver, and they are well equipped, but, carry "their own concept" of lobe profiles.

I'd be happy with the results you have achieved. Some of us (me) are constantly seeking maximum efficiency from a pattern and have chosen "Chrysler" specific shops that have many years of eking out the most from the .904 lifter and its capacity to follow an aggressive ramp, broad nose and fast closing rate.

These "patterns" are not found in your average hydraulic profiles...

Post up a sound byte for us when you have a chance and happy motoring!

I thought it was a duplicate of an original cam. Is it not? I don't care enough to go back to the old threads There is little to no lope to the cam and as discussed, manifold vacuum is on the low side. If I had to do it again I might go with something different but not the XE268 which seems to be notorious for noise.

 

[Illahe]

I thought it was a duplicate of an original cam. Is it not? I don't care enough to go back to the old threads There is little to no lope to the cam and as discussed, manifold vacuum is on the low side. If I had to do it again I might go with something different but not the XE268 which seems to be notorious for noise.

The LSA is killing any overlap pulsing out of your tailpipes. The people that run Schneider Cams are some nice folks that have a solid history of producing effective Chrysler profiles. You may want to give them a ring an B.S. with them some time. One of the owners comes from Crowers Cams tree, I believe through marriage.

As you have stated, the cam preforms well off the bottom, and that is often a hitch with 2.02" valve'd 340 that's been "cam'd up" so you are ahead of the curve.

Thanks for sharing your results with us.

 

[Mattax]

I thought it was a duplicate of an original cam. Is it not?

It's not. I just posted its not. Clearly I'm not on your ignore list, but apparently I was not clear.

Oregon's '68 4-speed cam may be about as close as can be easily purchased.

The product is not available. There is something close, but thats not the same.
It may be good enough for some, but others were interested in the original - surviving examples of which is hard enough.

 

[1MeanA]

It's not. I just posted its not. Clearly I'm not on your ignore list, but apparently I was not clear.

I read it I'm just not getting into the duplicate argument.

 

[Bewy]

There is no industry 'standard' of 0.750 times the adv duration to get the 050 numbers simply because [a] the tappet lift for adv duration varies between cam grinders [ b] cam intensity varies.

For Chrys cams, 750 can be used for production cams & 850 for the MP cams.

 

[RustyRatRod]

There is no industry 'standard' of 0.750 times the adv duration to get the 050 numbers simply because [a] the tappet lift for adv duration varies between cam grinders [ b] cam intensity varies.

For Chrys cams, 750 can be used for production cams & 850 for the MP cams.

Whatever man. I was mistaken. It's actually .777