| Slant Six Forum https://slantsix.org/forum/ |
|
| Valve spring question https://slantsix.org/forum/viewtopic.php?t=49053 |
Page 1 of 1 |
| Author: | Charrlie_S [ Thu Jun 14, 2012 4:27 pm ] |
| Post subject: | Valve spring question |
Has anyone ever run the Mopar 528 lift cam with 340 valve springs? Did they have enough pressure? What about coil bind? Or did you have to run dual springs? I have several sets of 340 springs, but no dual springs. I am going to try that cam, but I am being myself..............."FRUGAL" 
|
|
| Author: | slantzilla [ Thu Jun 14, 2012 5:57 pm ] |
| Post subject: | |
I wasn't brave enough to try it Charlie. Mike did not put double spings on mine, but we did move up from the 340 springs. IIRC, the .528 cam is just a touch over what Mike felt safe with 340 springs. They are good for roughly .500 gross lift. |
|
| Author: | Rick Covalt [ Thu Jun 14, 2012 6:49 pm ] |
| Post subject: | |
With valve lash you are pretty close to .500 anyway. It may be something to give a try. Then you can let us know how it works Charlie!!
|
|
| Author: | Charrlie_S [ Thu Jun 14, 2012 7:14 pm ] |
| Post subject: | |
I'm thinking the 340 springs are marginal. If it was a 225 and only turning a max of 6,000 rpm, I would probably try the 340 springs. This is a 170 and will be turning close to 7,000 rpm, so I guess I will have to bite the bullet, and buy some springs. Will have to wait for a little while, till the budget allows. Meanwhile I will cut the guides for seals, do a little grinding on the pushrod holes (late style head, and the 3/8 pushrods are rubbing). Maybe even put in some MP over size valves, with pocket porting. This would all be free labor (mine )
|
|
| Author: | Dart270 [ Fri Jun 15, 2012 6:45 am ] |
| Post subject: | |
Coil bind is the issue. These do not look good to me. Lou |
|
| Author: | Charrlie_S [ Fri Jun 15, 2012 7:04 am ] |
| Post subject: | |
Quote: Coil bind is the issue. These do not look good to me.
Yep. I'm thinking, "penny wise and pound foolish". There is a difference between "frugal" and "cheap". I will just wait a little bit and get a better spring for the application. Anyone have a deal on some springs?
Lou |
|
| Author: | 805moparkid [ Sun Jun 17, 2012 9:22 pm ] |
| Post subject: | |
run these... http://www.summitracing.com/parts/CRN-99839-16/ they will give you a good 300 open pressure 130 seat... something to remember to is Lift(- lash) + .050 clearance + coil bind = installed height... these will give you the pressure and with .020 shim or so (on a 1.7 stock installed height) should have you set... |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|