The wider lobe is not needed with the Helix 2 grind.
Longer duration allows a slower lift on the lobe compared to stock. The wider lobe also slows tappet rotation which adds to higher wear on regrind cams. Rotating the tappets ( called sliding tappets also ) are key to slower wear.
The Helix is harder at the lobe as well. The lighter overall rotating mass/weight helps avoid breakage under heavy loads. Simply less mass.
When the molds are produced, we can make them any configuration we like. Wider, not as wide, etc. A larger diameter, etc. The Helix is made this way by design.
The only load we dont like on the Helix cast cams is a 13mm inline P pump. Actually it is not the load to turn the P pump, but the unloading and shock that can oocur if a driveline piece breaks and the load is removed quickly.
The Helix lobes are the same width as the 12V cam, but not as wide as the 24 and CR. Some discussion has occured on paying for another mold, but this has not been needed. Our wear rates are the lowest we have seen on any of the cams available.
We have designed the our cam cores with a larger core diameter as well as wider lobes. We also typically have more lift than the other drop in cams. That is why we chose the name bigstick. From now on we will go by the
@.050" duration and lift at the valve for a name. I initially thought you had to have a fancy name like sportsman, helix, maxspool, etc to sell a cam. From now on no fancy names, just real world specs and the best grinds on the market.
Zach Hamilton
Does anybody know the lobe width of the Helix-2 yet?
Zach
What about you Don? How wide is the lobe on your cam? Do I have to buy one to find out?
Zach
Do you still have the lowest wear rates with those narrow lobes and low zinc oil?
I do try to keep the pissing matches to a minimum and not hijack threads and turn them to promote my products. I believe the squeeky clean ad campaign is best. However in this he said she said world sometimes you have to get into the trenches and get a little dirty. Thankyou for your concern. I will try to keep a squeeky clean ad campaign.
I believe the squeeky clean ad campaign is best. However in this he said she said world sometimes you have to get into the trenches and get a little dirty. Thankyou for your concern
Do you still have the lowest wear rates with those narrow lobes and low zinc oil?
Why is the lift lower on the exhaust as compared to stock? If a ported head is used, and a HElix 2 installed, should high ratio rockers be used? If yes what are physical and functional limits of high ratio rockers. Good educational thread.
Does anyone have an idea about this?
I'm just going to hazard a speculation about this, but less lift on the exhaust side is probably made up for (and made better by) the extended duration. The whole point of the longer duration/shorter lift is that the valve train lives an easier life.
I thought that was the trade off, but the other part of question still remains. With head porting and more flow at higher lift, would higher ratio rockers on exhaust side be beneficial with increased RPM?
Re-read post 143, sums it up good