How much can you machine spring pockets on SB Edelbrocks?
#2984223
11/11/21 06:11 PM
11/11/21 06:11 PM
|
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
WadeMetzinger
OP
top fuel
|
OP
top fuel
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
|
Does anyone know or know how to find out how much you can safely matching the spring pockets on a set of SB Edelbrock heads?
I’m at 1.680 and need to be at 1.860 so I need to matching .180 in the spring pockets but not sure if that’s possible.
Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984231
11/11/21 06:30 PM
11/11/21 06:30 PM
|
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
|
If you’re at 1.680, you’re using parts that are “incorrect” for those heads.
The assemblies from Ede come with a nominal 1.800” IH, with some shims under the springs.
The as-supplied valve lengths are 4.98 intake/5.00 exhaust with a .250 tip length.
With some tall retainers you can get to 1.900.
As for attempting to cut the spring pockets .180”........ I would strongly advise against trying that.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: fast68plymouth]
#2984300
11/11/21 09:58 PM
11/11/21 09:58 PM
|
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
WadeMetzinger
OP
top fuel
|
OP
top fuel
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
|
Comp Beehive springs, 26120
Locators are .060”
.180 was with std locks, switch to +.050 for picture
Cam is .563” lift
Coil bind 1.230”
Add .050 to keep from coil bind
= 1.280
+ .563 cam lift
= 1.843
Install height is 1.720 (includes .060 shim for locator)
So I need .123 more install height, it was .173 with std locks.
Last edited by WadeMetzinger; 11/11/21 10:02 PM.
Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984420
11/12/21 09:59 AM
11/12/21 09:59 AM
|
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
WadeMetzinger
OP
top fuel
|
OP
top fuel
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
|
Some options I was thinking about:
1. Cutting pockets .200, but that sounds like a no go
- can I safely cut any into the pocket? If I could cut .065” and the diameter of the spring, then I could loose the locator .060 and just use a .015 shim. That would get me .110”
2. Mill .030 off the locators
3. Change to .100 taller valves
4. Change springs to Manley 221428 which have coil bind at 1.085.
Last edited by WadeMetzinger; 11/12/21 10:05 AM.
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984435
11/12/21 10:37 AM
11/12/21 10:37 AM
|
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
Jeremiah
master
|
master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
|
Use a +.100 retainer with that +.050 lock and take the rest off of the spring cup.
You will most likely have to grind the cups/locators to the desired spec. Those things are hard on tooling in my limited experience, with my substabdard tooling. : D
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984456
11/12/21 12:13 PM
11/12/21 12:13 PM
|
Joined: Feb 2005
Posts: 20,154
PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,154
PA.
|
I wish I understood more on what you are trying to do but I run a .660 lift roller cam on my Edelbrock heads. I open them for a 1.550 spring and shim as needed. Easy peasy.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984474
11/12/21 01:04 PM
11/12/21 01:04 PM
|
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
Jeremiah
master
|
master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
|
They don’t make +.100 retainer and I’m already using the +.050 locks. The easy buttons have already been pushed, looking for help on other options. Mainly asking if anyone knows if you can safely cut into spring pockets, even .065 would help. A better way to put that is "They (I assume Comp) don't make a +100 retainer" to "They don't make a +.100 retainer that I know of" With all of the LS stuff using small diameter springs there is quite a variety of +.100 behive retainers because the installed height on the new junk is relatively short. Good luck with your project!
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984616
11/12/21 07:33 PM
11/12/21 07:33 PM
|
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
|
You’re trying to use a spring/retainer package that’s designed for more installed height than that head provides.
There are alternative non-beehives that easily fit those heads.
If you feel like you have to use beehives, you can either use shorter ones....... or start thinking about custom parts.
26918’s would work fine at 1.720 with .563 lift.
For the non-beehive applications, the Comp tool steel and Titanium retainers add about .030” installed height over the steel counterparts.
I don’t know it the same holds true for the beehive retainers or not.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: fast68plymouth]
#2984770
11/13/21 09:53 AM
11/13/21 09:53 AM
|
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
WadeMetzinger
OP
top fuel
|
OP
top fuel
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
|
Thanks Dwayne, I think changing springs to the comp 26918 or the Manley 221428 is the best option
Jeremiah, I hadn’t checked other suppliers, thanks for that suggestion but still turned up with no +.100 options. I checked comp, Manley and PAC.
Wastedays, you have to run a shim btw the mic and the retainer when using the small beehive retainer and standard Mic. I use .060 shim because that is the thickness of the spring cup/locator so 1.720” is the actual install height.
Pittsburghracer, just trying to make the heads, valves, springs, retainers and locks I was provided work with a .563 lift cam.
Thanks to everyone that offered help and suggestions.
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: WadeMetzinger]
#2984796
11/13/21 11:14 AM
11/13/21 11:14 AM
|
Joined: Feb 2005
Posts: 20,154
PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,154
PA.
|
Thanks Dwayne, I think changing springs to the comp 26918 or the Manley 221428 is the best option
Jeremiah, I hadn’t checked other suppliers, thanks for that suggestion but still turned up with no +.100 options. I checked comp, Manley and PAC.
Wastedays, you have to run a shim btw the mic and the retainer when using the small beehive retainer and standard Mic. I use .060 shim because that is the thickness of the spring cup/locator so 1.720” is the actual install height.
Pittsburghracer, just trying to make the heads, valves, springs, retainers and locks I was provided work with a .563 lift cam.
Thanks to everyone that offered help and suggestions. Ok now I’m on the same page.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
|
|
|
Re: How much can you machine spring pockets on SB Edelbrocks?
[Re: pittsburghracer]
#2984809
11/13/21 11:35 AM
11/13/21 11:35 AM
|
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
|
I don’t use a washer on top of the height mic for beehive retainers.
The step on the height mic is .150” tall. You just subtract that from the reading.
So, if you were shooting for say, 1.830” installed height, you’d be looking for a reading of 1.980”.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
|
|
|
|
|
or longer valves 
