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edelbrock performer rpm 440 heads

Posted By: modified1090

edelbrock performer rpm 440 heads - 03/20/11 03:27 PM

any one change there springs on a set of these?
what did you put on them and if you dont mind me asking why did you go with what you did?
Posted By: 66er

Re: edelbrok performer rpm 440 heads - 03/20/11 04:40 PM

You can use any spring that has up to aprox 1.56" dia. and 1.88" installed height. If your just replacing what you have, comp 911 are comparable. If your trying to match a cam, your cam manf. can select one. I'm running Isky 9935 wiyh a solid roller cam.
Posted By: modified1090

Re: edelbrok performer rpm 440 heads - 03/20/11 05:26 PM

i am running the mopar purple shaft .590 312 duration cam. i cannot find any recommendations for this anywhere.
Posted By: S/ST 3040

Re: edelbrok performer rpm 440 heads - 03/20/11 05:33 PM

Try a Comp Cams 928, installed @ 1.875"

Posted By: tboomer

Re: edelbrok performer rpm 440 heads - 03/20/11 05:34 PM

Isky 8000a?
Posted By: mopar65

Re: edelbrok performer rpm 440 heads - 03/20/11 05:40 PM

i ran the isky 8005A with the same set up that you have but with 1.6 indy roller rockers. mopar65
Posted By: tboomer

Re: edelbrok performer rpm 440 heads - 03/20/11 05:42 PM

I had the wrong number!! Yes...8005A..
Posted By: modified1090

Re: edelbrok performer rpm 440 heads - 03/20/11 05:46 PM

where the valves replaced or did you still have the same valves that came from edelbrock? don't get me wrong i want to do the right thing i just don't want to spend a lot of money. (i think most of us feel that way)
Posted By: 66er

Re: edelbrok performer rpm 440 heads - 03/20/11 05:47 PM

Quote:

Try a Comp Cams 928, installed @ 1.875"







I ran those for a while with a .600" flat tappet cam. Fit like a glove
Posted By: 66er

Re: edelbrok performer rpm 440 heads - 03/20/11 05:50 PM

Run the same valves. You can upgrade to your locks and retainers without spending a lot of $.
Posted By: modified1090

Re: edelbrok performer rpm 440 heads - 03/20/11 05:51 PM

Quote:

i ran the isky 8005A with the same set up that you have but with 1.6 indy roller rockers. mopar65

did u have to cut the seat pockets for the smaller id of the inner spring? or did u just shim for the difference in installed height between the edelbrock and isky recomend, i think the difference is only .010" is that enough to worry about?
Posted By: mopar65

Re: edelbrok performer rpm 440 heads - 03/20/11 06:09 PM

Quote:

Quote:

i ran the isky 8005A with the same set up that you have but with 1.6 indy roller rockers. mopar65

did u have to cut the seat pockets for the smaller id of the inner spring? or did u just shim for the difference in installed height between the edelbrock and isky recomend, i think the difference is only .010" is that enough to worry about? [/quot

Hi no there is enough room that the springs fit fine and i did not reshim them. i checked a few to compare and thye were so close on mine i did not think it was the worth the trouble to shim the new springs. i used the stock valves but went to a 10 degree reatainer/keeper that set up worked fine for the 3 years i had the car untill i sold it.thanks mopar 65
Posted By: cbarracuda

Re: edelbrok performer rpm 440 heads - 03/20/11 06:13 PM

Quote:

i am running the mopar purple shaft .590 312 duration cam. i cannot find any recommendations for this anywhere.

the old mopar book said 140 sit pression,
Posted By: modified1090

Re: edelbrok performer rpm 440 heads - 03/20/11 06:23 PM

Quote:

Quote:

i am running the mopar purple shaft .590 312 duration cam. i cannot find any recommendations for this anywhere.

the old mopar book said 140 sit pression,


thanks, i know that the spings on the heads now are only rated at 115 seat psi 280@.500"
Posted By: qwkmopardan

Re: edelbrock performer rpm 440 heads - 03/20/11 06:31 PM

I have done several sets of eddys small and big block. What has worked every time on big block is adding a red or blue comp inner spring to the original spring with comp retainer #741-16 steel or 732-16 titanium. This is to get 340-350 at .600 lift and 150-160 seat pressure. The original springs are borderline to stiff for hyd cams and borderline to weak for solid cams. The original springs from edel. will work the way they are if not revving over 6000 rpm. If the edel. springs are new, the blue should work, if the edel. springs have a couple hundred runs on them try the red inner. red part#975-16, blue part#974-16. These are around $30 at summit. Steel retaners and locks will be around $80. tit. retainers will shock you at around $320 with locks.
Posted By: BSB67

Re: edelbrock performer rpm 440 heads - 03/20/11 08:18 PM

Quote:

I have done several sets of eddys small and big block. What has worked every time on big block is adding a red or blue comp inner spring to the original spring with comp retainer #741-16 steel or 732-16 titanium. This is to get 340-350 at .600 lift and 150-160 seat pressure. The original springs are borderline to stiff for hyd cams and borderline to weak for solid cams. The original springs from edel. will work the way they are if not revving over 6000 rpm. If the edel. springs are new, the blue should work, if the edel. springs have a couple hundred runs on them try the red inner. red part#975-16, blue part#974-16. These are around $30 at summit. Steel retaners and locks will be around $80. tit. retainers will shock you at around $320 with locks.



Nice info. Thanks
Posted By: MoparBilly

Re: edelbrock performer rpm 440 heads - 03/20/11 09:52 PM

Quote:

I have done several sets of eddys small and big block. What has worked every time on big block is adding a red or blue comp inner spring to the original spring with comp retainer #741-16 steel or 732-16 titanium. This is to get 340-350 at .600 lift and 150-160 seat pressure. The original springs are borderline to stiff for hyd cams and borderline to weak for solid cams. The original springs from edel. will work the way they are if not revving over 6000 rpm. If the edel. springs are new, the blue should work, if the edel. springs have a couple hundred runs on them try the red inner. red part#975-16, blue part#974-16. These are around $30 at summit. Steel retaners and locks will be around $80. tit. retainers will shock you at around $320 with locks.



Likewise for me, just went through my collection of old springs until I found a set of inners that gave me the right pressure. When I pulled the 312/590 out and went with the 304/640 ultradyne, I upgraded to crower spriings and Titanium retainers.

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Posted By: Ari440

Re: edelbrock performer rpm 440 heads - 03/20/11 10:06 PM

Quote:

Quote:

I have done several sets of eddys small and big block. What has worked every time on big block is adding a red or blue comp inner spring to the original spring with comp retainer #741-16 steel or 732-16 titanium. This is to get 340-350 at .600 lift and 150-160 seat pressure. The original springs are borderline to stiff for hyd cams and borderline to weak for solid cams. The original springs from edel. will work the way they are if not revving over 6000 rpm. If the edel. springs are new, the blue should work, if the edel. springs have a couple hundred runs on them try the red inner. red part#975-16, blue part#974-16. These are around $30 at summit. Steel retaners and locks will be around $80. tit. retainers will shock you at around $320 with locks.



Likewise for me, just went through my collection of old springs until I found a set of inners that gave me the right pressure. When I pulled the 312/590 out and went with the 304/640 ultradyne, I upgraded to crower spriings and Titanium retainers.






was the U/D 640 faster then the 590 cam
Posted By: 67Charger

Re: edelbrok performer rpm 440 heads - 03/20/11 11:45 PM

Quote:

Quote:

Try a Comp Cams 928, installed @ 1.875"







I ran those for a while with a .600" flat tappet cam. Fit like a glove



Same here, Eddie valves, 1.6 rockers with .600" net lift with Comp 928's, stable to 7000+ rpm. Do yourself a favor and have the valve guide clearances checked, mine were tight and I have heard MANY reports of the same.
Posted By: Anonymous

Re: edelbrok performer rpm 440 heads - 03/21/11 01:43 AM

Quote:

Quote:

Quote:

Try a Comp Cams 928, installed @ 1.875"







I ran those for a while with a .600" flat tappet cam. Fit like a glove



Same here, Eddie valves, 1.6 rockers with .600" net lift with Comp 928's, stable to 7000+ rpm. Do yourself a favor and have the valve guide clearances checked, mine were tight and I have heard MANY reports of the same.



My eddy heads had the same tight valve guide issue as well.
Posted By: MoparBilly

Re: edelbrock performer rpm 440 heads - 03/21/11 07:02 AM

Quote:

Quote:



Likewise for me, just went through my collection of old springs until I found a set of inners that gave me the right pressure. When I pulled the 312/590 out and went with the 304/640 ultradyne, I upgraded to crower spriings and Titanium retainers.






was the U/D 640 faster then the 590 cam



Wasn't a fair A to B comparison...broke the motor, so along with the cam swap, I went from LY/TRW to BME/ROSS...

Same car, trans, gear, heads, carb, headers, cubic inch, and compression...10.60 to 10.00

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