Cams - Competition Diesel.Com

*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.

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

Quote:

Originally Posted by Soup Nazi

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!

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

*Soup Nazi* · 05-17-2011, 10:21 AM

Quote:

Originally Posted by Big Blue24

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?

02-12-2011, 12:12 PM	#1
Soup Nazi Name: Soup Nazi Title: The artist formerly known as Don M Status: Not Here Join Date: Sep 2006 Member`s Gallery Posts: 1,197	Cams 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. Still a few months out on release. The original Helix 2 cams are in stock though. Sold 10 before I even opened the crate. __________________

04-28-2011, 08:46 AM	#5
TURBOLVR Name: TURBOLVR Title: Mr. Whipple Status: Not Here Join Date: Mar 2008 Member`s Gallery Posts: 2,566	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! __________________ Cummins guys keep it straight, the others go both ways! Great prices on what your Cummins needs: WWW.CRAZYCARLSTURBOS.COM*

05-13-2011, 07:50 AM	#6
XLR8R Name: XLR8R Title: Crew Chief Status: Not Here Join Date: Sep 2007 Location: Pattonville, TX Member`s Gallery Posts: 2,364	Overlap for an H2b should be ~74.6* @ seat timing. __________________ 3 Nails Garage Sleeps a flock of Rams & a Goat GUN-HAPPY Crew Chief

05-13-2011, 08:30 AM	#7
TURBOLVR Name: TURBOLVR Title: Mr. Whipple Status: Not Here Join Date: Mar 2008 Member`s Gallery Posts: 2,566	that sounds excessive. __________________ Cummins guys keep it straight, the others go both ways! Great prices on what your Cummins needs: WWW.CRAZYCARLSTURBOS.COM

05-13-2011, 09:03 AM	#8
XLR8R Name: XLR8R Title: Crew Chief Status: Not Here Join Date: Sep 2007 Location: Pattonville, TX Member`s Gallery Posts: 2,364	Not for seat timing... maybe .050" is easier for you? (-22.1) __________________ 3 Nails Garage* Sleeps a flock of Rams & a Goat GUN-HAPPY Crew Chief

02-12-2011, 12:30 PM	#2
cquestad Name: cquestad Title: Too Much Time Status: Not Here Join Date: Oct 2007 Member`s Gallery Posts: 1,696	Don...I am ready with an 04. You could inspect my Helix 2 with a hard hundred k!

02-12-2011, 12:49 PM	#3
Soup Nazi Name: Soup Nazi Title: The artist formerly known as Don M Status: Not Here Join Date: Sep 2006 Member`s Gallery Posts: 1,197	Awesome! Lets roll baby! Gimme a few weeks to get the new grind dialed in and I will send it over.

02-13-2011, 03:43 PM	#4
cquestad Name: cquestad Title: Too Much Time Status: Not Here Join Date: Oct 2007 Member`s Gallery Posts: 1,696	Great...this will give me motivation to fix a couple of other small things for some dyno time.

05-16-2011, 11:37 AM	#9
Soup Nazi Name: Soup Nazi Title: The artist formerly known as Don M Status: Not Here Join Date: Sep 2006 Member`s Gallery Posts: 1,197	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. __________________

05-16-2011, 11:50 AM	#10
cquestad Name: cquestad Title: Too Much Time Status: Not Here Join Date: Oct 2007 Member`s Gallery Posts: 1,696	Don....how do I know which H2 is in my truck?

05-16-2011, 11:58 AM	#11
Soup Nazi Name: Soup Nazi Title: The artist formerly known as Don M Status: Not Here Join Date: Sep 2006 Member`s Gallery Posts: 1,197	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.

05-16-2011, 04:37 PM	#12
TURBOLVR Name: TURBOLVR Title: Mr. Whipple Status: Not Here Join Date: Mar 2008 Member`s Gallery Posts: 2,566	Thank you! __________________ Cummins guys keep it straight, the others go both ways! Great prices on what your Cummins needs: WWW.CRAZYCARLSTURBOS.COM

05-16-2011, 09:20 PM	#14
XLR8R Name: XLR8R Title: Crew Chief Status: Not Here Join Date: Sep 2007 Location: Pattonville, TX Member`s Gallery Posts: 2,364	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! FWIW BigBlue, my spreadsheet shows -22.5... Don? __________________ 3 Nails Garage* Sleeps a flock of Rams & a Goat GUN-HAPPY Crew Chief

05-17-2011, 10:23 PM	#16
Boostediesel Name: Boostediesel Title: Boost Addict Status: Not Here Join Date: Oct 2009 Member`s Gallery Posts: 575	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?

05-18-2011, 12:10 PM	#17
Soup Nazi Name: Soup Nazi Title: The artist formerly known as Don M Status: Not Here Join Date: Sep 2006 Member`s Gallery Posts: 1,197	yes, but the H2 is not a final product yet. Getting close. Just a few tweaks left. __________________

05-19-2011, 01:57 AM	#18
Boostediesel Name: Boostediesel Title: Boost Addict Status: Not Here Join Date: Oct 2009 Member`s Gallery Posts: 575	cool, looking foward to the results

08-12-2011, 03:38 PM	#19
Spooler Name: Spooler Title: Too Much Time Status: Not Here Join Date: Aug 2008 Member`s Gallery Posts: 1,539	Any update on the Cams Don?