jub jub

I'm getting ready to replace the springs that came with the AFR 205 heads and I like the looks of the beehive. They seem to be just what the doctor ordered in helping keep valve train weight to a minimum, thus reducing valve bounce, harmonics, etc.

Is there a general consensus out there as to whether or not these springs are any good?

mvvette97

iTrader: (18)

there is nothing wrong with them because your factory springs are beehive. I had some 918s break on my ta so that could of been a bad deal. I now use duals. A little more protection

jub jub

Thanks.

I understand about the duals offering more protection but I'm pretty easy on my springs and I like to change them often.

I was just curious about things like valve float on a fairly aggressive cam lobe.

Dan_the_C5_Man

Dave Vizard published an article delving into this subject in detail; http://www.popularhotrodding.com/tec...retainers.html basically, the behive design is superior in all aspects.

byler900f

iTrader: (1)

918's are a great spring for cams under .600 lift.

PREDATOR-Z

just get replacements from AFR. call tony mamo, he'll tell you why.

vettenuts

iTrader: (4)

One other option is the PSI beehive spring. It is stiffer than the 918 and will set up on the seat with about 135 lbs at 1.750" installed height. I think the k value is 384 lb/in. Titanium retainers are 6.6 grams for these springs.

jub jub

Thanks for your opinions guys!

gtovan

These are what I am using on my LS7 cam install (650" lift.) PSI 1511ML. ML is for max life, a coating to improve durability. Install height: 120# @1.800" 370# @ 1.150" coil bind 1.100". Katech did comparison testing on a bunch of springs for their LS7 package and this is what they use. You can get them from them or CV Products.

vettenuts

iTrader: (4)

Yes, these are the same valve springs that come on the Dart out of the box heads. They are nitrided for longer life.

rickyracer25

iTrader: (11)

I like this guy he's smart listen to the man

Katech_Jason

iTrader: (19)

That is correct. We use beehive springs on all of our street packages. They have been validated on our Optron valvtrain dynamics test cell and provide the best valve control far beyond the redline.

vettenuts

iTrader: (4)

Are you using the PSI springs? If so, what retainers do you use?

vettenuts

iTrader: (4)

Question for Katech,

Any idea of the life of the PSI springs?

slt200mph

iTrader: (42)

I have 38,000 + miles on a set of PRC platinum duals with a .600 lift cam .. I like the peace of mind that the duals provide and I obviously don't change them often ... they are going to be changed in the next few weeks to a
Comp Cams 921 dual spring for use on a cam with higher lift (.637\.639) ..

jub jub

So far, everthing seems to point in the direction of the beehives so it seems these would be the right choice for my small cam.

I wonder what Tony has to say about them? (hint hint)

Katech_Jason

iTrader: (19)

Katech Ti

Katech_Jason

iTrader: (19)

Depends on driving conditions

vettenuts

iTrader: (4)

Mostly street, occasional drag (I think this is probably the most common driving that most of the guys here do).