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Soup Nazi
02-12-2011, 12:12 PM
Still working on new grinds, but have targeted some profound changes for the 03-04 CR and the 12V.

The old Helix 2 is still pretty good in the 04.5 - 07, but we found some tweaks there as well. One would have to kill one of my testers to get the new cam back out of his engine. LOL Still a few months out on release.

The original Helix 2 cams are in stock though. Sold 10 before I even opened the crate.

cquestad
02-12-2011, 12:30 PM
Don...I am ready with an 04. You could inspect my Helix 2 with a hard hundred k!

Soup Nazi
02-12-2011, 12:49 PM
Awesome! Lets roll baby!

Gimme a few weeks to get the new grind dialed in and I will send it over.

cquestad
02-13-2011, 03:43 PM
Great...this will give me motivation to fix a couple of other small things for some dyno time.

TURBOLVR
04-28-2011, 08:46 AM
Don- could you tell me (PM if needed) the specs on the Helix2? I am primarily looking for the degrees of valve overlap, I think you said the LSA is 110.3*. Thanks!

XLR8R
05-13-2011, 07:50 AM
Overlap for an H2b should be ~74.6* @ seat timing.

TURBOLVR
05-13-2011, 08:30 AM
that sounds excessive.

XLR8R
05-13-2011, 09:03 AM
Not for seat timing... maybe .050" is easier for you? (-22.1*)

Soup Nazi
05-16-2011, 11:37 AM
Mike is pretty close. It is spec'd to be -24.4 and his may have measured the -22.1.

For comparison:
The stock Cummins marine is -25.6 degrees Overlap
The stock Cummins 24VP is -33.4 degrees Overlap

The Helix 2 has changed a bunch now anyway, so we are talking the older grind from 2004-2005 time frame in this thread.

cquestad
05-16-2011, 11:50 AM
Don....how do I know which H2 is in my truck?

Soup Nazi
05-16-2011, 11:58 AM
All the cams are the original Helix 2. The new grind is not very well distributed yet. Only a handful have it.

Actually there may be one or two more tweaks before final release of the new grind.

TURBOLVR
05-16-2011, 04:37 PM
Thank you!

Big Blue24
05-16-2011, 04:52 PM
Mike is pretty close. It is spec'd to be -24.4 and his may have measured the -22.1.

For comparison:
The stock Cummins marine is -25.6 degrees Overlap
The stock Cummins 24VP is -33.4 degrees Overlap

The Helix 2 has changed a bunch now anyway, so we are talking the older grind from 2004-2005 time frame in this thread.

What's the overlap on a stock Cummins (non marine) 12 valve cam?

XLR8R
05-16-2011, 09:20 PM
Darn - my lobe profiles are scattered a degree or two around Don's numbers... time to either get my sliderule recalibrated or update the prescription on my monocle! :hehe:

FWIW BigBlue, my spreadsheet shows -22.5*... Don?

Soup Nazi
05-17-2011, 10:21 AM
What's the overlap on a stock Cummins (non marine) 12 valve cam?


-24.1

Boostediesel
05-17-2011, 10:23 PM
Don, i purchased an older Helix 2 from Tim Barber for my 03 motor, it has never been used, is there any way i can send it in to u to have it reground to the new specs or would i have to sell mine and purchase a new one?

Soup Nazi
05-18-2011, 12:10 PM
yes, but the H2 is not a final product yet. Getting close. Just a few tweaks left.

Boostediesel
05-19-2011, 01:57 AM
cool, looking foward to the results

Spooler
08-12-2011, 03:38 PM
Any update on the Cams Don?