Re: RB hyd Roller lifter issues?
[Re: AndyF]
#2637158
03/25/19 09:53 PM
03/25/19 09:53 PM
|
Joined: Aug 2011
Posts: 2,872 Pattison Texas
CSK
master
|
master
Joined: Aug 2011
Posts: 2,872
Pattison Texas
|
The Comp 26915 beehives should work for most hyd roller cams. They are good to 0.600 lift. That is what is on mine. edit,, 26120 is what I am using.
Last edited by csk; 03/26/19 12:24 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
|
|
|
Re: RB hyd Roller lifter issues?
[Re: CSK]
#2637273
03/26/19 10:03 AM
03/26/19 10:03 AM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
Imo, the Comp conical spring 7228 and the beehive spring 26915 are not designed for the same application. The loads and rates aren’t really very close to each other.
7228- 136@1.800/399@1.200, 438lbs/in
26915- 105@1.800/293@1.200, 313lbs/in
I look at the 26915 as a spring suitable for a lighter weight valvetrain(like a small block) that’s using lobes that are very smooth.
For a typical BB Mopar hyd roller application where someone wants a beehive spring I generally use the 26120, which is 155@1.880/377@1.280, 370lbs/in.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: RB hyd Roller lifter issues?
[Re: Lee446]
#2637313
03/26/19 11:23 AM
03/26/19 11:23 AM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
What are the advantages/disadvanteges of Beehive springs? I don't really know anything about them. There should be multiple threads on that topic here, or over on Speedtalk and YB. As with anything in this hobby, there is no universal answer. We’ve actually taken them out of some BBC marine builds were they just weren’t up to the job.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: RB hyd Roller lifter issues?
[Re: Lee446]
#2637333
03/26/19 12:11 PM
03/26/19 12:11 PM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
If you go through the forums, just as with the hyd roller lifters...... you’ll find they are not universally loved.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: RB hyd Roller lifter issues?
[Re: fast68plymouth]
#2637337
03/26/19 12:18 PM
03/26/19 12:18 PM
|
Joined: Aug 2011
Posts: 2,872 Pattison Texas
CSK
master
|
master
Joined: Aug 2011
Posts: 2,872
Pattison Texas
|
Imo, the Comp conical spring 7228 and the beehive spring 26915 are not designed for the same application. The loads and rates aren’t really very close to each other.
7228- 136@1.800/399@1.200, 438lbs/in
26915- 105@1.800/293@1.200, 313lbs/in
I look at the 26915 as a spring suitable for a lighter weight valvetrain(like a small block) that’s using lobes that are very smooth.
For a typical BB Mopar hyd roller application where someone wants a beehive spring I generally use the 26120, which is 155@1.880/377@1.280, 370lbs/in. I'm Sorry the 26120 is what I have, brain dead moment
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
|
|
|
Re: RB hyd Roller lifter issues?
[Re: Lee446]
#2637347
03/26/19 12:53 PM
03/26/19 12:53 PM
|
Joined: Oct 2007
Posts: 4,213 New York
polyspheric
master
|
master
Joined: Oct 2007
Posts: 4,213
New York
|
Hydraulic should only make noise (caused by the roller leaving the lobe and landing again) when the spring pressure + lift rate exceed the hydraulic pressure in the tappet, and the plunger compresses. The lifter's leak rate may be too high, oil supply volume in the gallery too small, or viscosity or oil pressure too low. Am I missing something?
Some beehive failures are from using a light spring believing that the design simply replaces a heavier cylindrical spring. The design saves some reciprocating weight (less wire mass, smaller retainer) but the advantage is multiple progressive rate (instead of linear) - but if harmonic float isn't a problem you may not have enough pressure.
Boffin Emeritus
|
|
|
|
|