What spring are they using?
06-27-2006, 09:15 PM
#23
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Originally Posted by DavidNJ
How close to coil bind to run?
That's also what we ran in the IRL a few years ago.
BTW, don't believe anything Vizard writes.
06-27-2006, 10:24 PM
#24
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Originally Posted by CamKing
.030" is common in NASCAR nowdays.
That's also what we ran in the IRL a few years ago.
That's also what we ran in the IRL a few years ago.
I heard that when some IRL engine folks went "outside" for cam lobe design they found some significantly better valve dynamics and some power. This was a few years ago also. Does that jibe with your experience?
BTW, don't believe anything Vizard writes.
06-28-2006, 01:22 AM
#25
FormerVendor
I think most of Vizards stuff is alright although he has some older cam ideas in some of his books even if he has changed his mind since then. He told me the year before Greg Anderson domination started that he was way up on everybody and indeed he was!
06-28-2006, 08:34 AM
#26
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Originally Posted by Old SStroker
Specifically why is that?
I heard that when some IRL engine folks went "outside" for cam lobe design they found some significantly better valve dynamics and some power. This was a few years ago also. Does that jibe with your experience?
I heard that when some IRL engine folks went "outside" for cam lobe design they found some significantly better valve dynamics and some power. This was a few years ago also. Does that jibe with your experience?
The GM cam designs never cam within 20hp of my designs.
as for Vizard, David's a nice guy, but he's english.
Last edited by CamKing; 06-28-2006 at 10:34 AM.
06-28-2006, 01:50 PM
#27
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Originally Posted by CamKing
I'm the one they went "outside" to.
The GM cam designs never cam within 20hp of my designs.
as for Vizard, David's a nice guy, but he's english.
The GM cam designs never cam within 20hp of my designs.
as for Vizard, David's a nice guy, but he's english.
Well, actually is wasn't from you that I heard about the IRL cams. I don't know who you are, but I'm pretty sure that you aren't the guy I heard it from face to face. Perhaps they tried a few "outsiders". Just how sophisticated is your lobe design software? Commercial or proprietary?
As for Vizard, what's being a Brit have to do with anything? There are a few fair-to-middlin' Brits doing engines. I will say that DV writes for an audience that isn't in the top few % of engine folks, but that's where the writing money is. He does know more that he puts in most of his writing which you probably noticed in your one-on-one with him.
So back to my original question to you: Why is .030 to coil bind "common in NASCAR nowdays" ?
06-28-2006, 03:23 PM
#29
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Originally Posted by Old SStroker
Well, actually is wasn't from you that I heard about the IRL cams. I don't know who you are, but I'm pretty sure that you aren't the guy I heard it from face to face. Perhaps they tried a few "outsiders". Just how sophisticated is your lobe design software? Commercial or proprietary?
As for Vizard, what's being a Brit have to do with anything?
My shop is right down the street from Vizard's house.
I'm making a couple of cams for him right now.
So back to my original question to you: Why is .030 to coil bind "common in NASCAR nowdays" ?
BTW, if you want to know who I am, look in March's issue of Circle Track.
There's a little story in there about balancing camshafts.
06-28-2006, 03:30 PM
#30
FormerVendor
I saw that article! You aren't the guy making distibutor gears and such as well? I know a few guys from the school that have mentioned you as well. Actually I didn't know that GM even ever did any of their own cams on IRL engines?
Originally Posted by CamKing
Proprietary, and my cams won three Indy 500's during the IRL era. Crower and LSM also made IRL cams that were better then GM's.
I guess you didn't see the little laughing face.
My shop is right down the street from Vizard's house.
I'm making a couple of cams for him right now.
Because the allmighty and powerful Spintron told us so.
BTW, if you want to know who I am, look in March's issue of Circle Track.
There's a little story in there about balancing camshafts.
I guess you didn't see the little laughing face.
My shop is right down the street from Vizard's house.
I'm making a couple of cams for him right now.
Because the allmighty and powerful Spintron told us so.
BTW, if you want to know who I am, look in March's issue of Circle Track.
There's a little story in there about balancing camshafts.
06-28-2006, 03:48 PM
#31
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Originally Posted by racer7088
I saw that article! You aren't the guy making distibutor gears and such as well? I know a few guys from the school that have mentioned you as well. Actually I didn't know that GM even ever did any of their own cams on IRL engines?
The basic IRL GM engine came with GM cams. Most all the engine builders replaced them with aftermarket cams.
06-28-2006, 06:24 PM
#33
TECH Fanatic
Originally Posted by CamKing
Proprietary, and my cams won three Indy 500's during the IRL era. Crower and LSM also made IRL cams that were better then GM's.
I guess you didn't see the little laughing face.
My shop is right down the street from Vizard's house.
I'm making a couple of cams for him right now.
I guess you didn't see the little laughing face.
My shop is right down the street from Vizard's house.
I'm making a couple of cams for him right now.
Because the allmighty and powerful Spintron told us so.
BTW, if you want to know who I am, look in March's issue of Circle Track.
There's a little story in there about balancing camshafts.
There's a little story in there about balancing camshafts.
06-28-2006, 10:26 PM
#34
Since NASCAR has been brought up, are beehives used in NASCAR or any class with a serious solid roller cam?
CamKing, do you make .842 solid flat tappet cams for late model and super late model oval cars?
CamKing, do you make .842 solid flat tappet cams for late model and super late model oval cars?
06-28-2006, 10:43 PM
#35
FormerVendor
David,
At one point some teams used the Big *** Beehives on some restrictor engines in Cup but I know at least once the higher rpm these springs spin at since they are single wound springs ate through the retainers and ended several guys days! A normal double spring doesn't turn as fast since both springs are tying to spin different directions and one wins but not by a lot!
At one point some teams used the Big *** Beehives on some restrictor engines in Cup but I know at least once the higher rpm these springs spin at since they are single wound springs ate through the retainers and ended several guys days! A normal double spring doesn't turn as fast since both springs are tying to spin different directions and one wins but not by a lot!
Originally Posted by DavidNJ
Since NASCAR has been brought up, are beehives used in NASCAR or any class with a serious solid roller cam?
CamKing, do you make .842 solid flat tappet cams for late model and super late model oval cars?
CamKing, do you make .842 solid flat tappet cams for late model and super late model oval cars?
06-29-2006, 07:01 AM
#36
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Originally Posted by DavidNJ
Since NASCAR has been brought up, are beehives used in NASCAR or any class with a serious solid roller cam?
CamKing, do you make .842 solid flat tappet cams for late model and super late model oval cars?
CamKing, do you make .842 solid flat tappet cams for late model and super late model oval cars?
The majority of the cams I sell are for Flat Tappet circle track classes.
I'll PM you the info from my website.
07-07-2006, 08:45 PM
#37
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I will add a little bit of insite to the beehives. We did develop the original beehive (the 95's) for the restrictor plate races and had some initial success but your are right about singles springs spinning and eating into the Ti retainers and creating its own set of issues. That did lead into development of much smaller dual spring for plate engines.
You do get great results by running springs very close to solid but you have to have everything set up close so that things dont go into bind and the springs need to have consistent coil bind tolerances
You do get great results by running springs very close to solid but you have to have everything set up close so that things dont go into bind and the springs need to have consistent coil bind tolerances
