When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a set of 7.3L heads that I’m rebuilding. They came off an engine that was knocking, full of metal in the pan, and had a missing piston oiler. These heads were supposedly assembled by a machine shop with comp beehive valve springs installed. I checked the installed height of the springs today and found that they were all above the 1.9” height recommended by CDD. Obviously they’d need shims at the least. But a couple of them appear to be leaning off to the side. I’m not very familiar with “beehive” style springs. Is this a normal characteristic or indicative of damage?
FWIW I thought the beehive springs were only recommended when boost levels were significantly increased--is this engine a mild or wild build?
It’s a mild build. My understanding is that they’re designed that way to reduce weight while improving spring pressure and performance with higher boost. They also accommodate higher levels of lift from bigger cams. So even without insane boost levels they should be capable of handling the engine stress.
I hadn't seen behive springs before. I don't get out much...
For regular springs the load on the spring is pretty linear with deflection according to a spring constant k.
with the beehive you have a variable spring shape so the k value is no longer constant. K will vary as the spring deflects under load. It's like two springs in one! I'll have follow the link back and read up on the beehive springs. Thanks for sharing!
I'm having issues with the Classic Diesel Design Web site. Maybe it's my old phone and maybe they are having issues? In any case I hope they get it figured out as a lot of old guys with old trucks also have old phones, and we are the ones who will be buying their stuff. They are one of my goto sources so sad to see I can't open the site.
I'm having issues with the Classic Diesel Design Web site. Maybe it's my old phone and maybe they are having issues? In any case I hope they get it figured out as a lot of old guys with old trucks also have old phones, and we are the ones who will be buying their stuff. They are one of my goto sources so sad to see I can't open the site.
Try clearing your browser (internet app) cookies. I find that solves my internet issues 9/10 times. I’ve been using their website on and off for the past few days and haven’t had any issues so I’d suspect your phone. If you don’t know how to clear the cookie data, look up a tutorial on Google.
Well I’ve sat on hold for 2 hours so apparently calling Edlebrock customer support isn’t going to work out. I also emailed them but they said it would be 5-8 days before they got back to me.
The email response I received is, "When looking at the provided picture, all the springs shown look great! I don't see any concerns based on the photo provided", which does not provide a lot of confidence. But that appears to be the only response I'm going to get.
A "beehive" or tapered spring can have some advantages. The retainer can be very small and light, this is good. Also the spring itself with the differing size of each coil and a pitch that varies as well tends to not have any single resonant frequency where it would tend to surge. It makes it self cancelling without needing a flat wound damper or an counter wound inner spring which also makes it lighter. They tend to be much more non linear than most other spring designs at least from what I've seen especially when running them close to coil bind. Bind height can sometimes vary by a lot within a set, .060 or more.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
