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Valve length question #1482074
08/09/13 12:50 PM 08/09/13 12:50 PM
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Nitrojunkee Offline OP
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Nitrojunkee  Offline OP
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I'm using a pair of Edelbrock RPM heads that are being stuffed with 2.19" intake and the standard 1.81" exhaust valves. Going with a solid roller blower grind from Bullet. I know the stem diameter on the RPM's are 11/32. But my question is, will the stock valve length work with a .600 lift cam? Or will I have to go with a longer valve?
Re: Valve length question [Re: Nitrojunkee] #1482075
08/09/13 12:59 PM 08/09/13 12:59 PM
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AndyF Offline
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RPM heads should be good past .600 lift. You should be able to get about 1.80 or 1.85 installed height on the valve spring which should give you enough for more than .600 lift.
Re: Valve length question [Re: Nitrojunkee] #1482076
08/09/13 01:11 PM 08/09/13 01:11 PM
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Thumperdart Offline
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Quote:

I'm using a pair of Edelbrock RPM heads that are being stuffed with 2.19" intake and the standard 1.81" exhaust valves. Going with a solid roller blower grind from Bullet. I know the stem diameter on the RPM's are 11/32. But my question is, will the stock valve length work with a .600 lift cam? Or will I have to go with a longer valve?

Pettis put 2.19 valves in my home ported rpm`s and everything`s great so far w/a .680-.660 Isky solid roller however the installed height leaves a bit to be desired.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Valve length question [Re: AndyF] #1482077
08/09/13 01:19 PM 08/09/13 01:19 PM
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Nitrojunkee Offline OP
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Quote:

RPM heads should be good past .600 lift. You should be able to get about 1.80 or 1.85 installed height on the valve spring which should give you enough for more than .600 lift.



Awesome, thanks for the info! I was thinking along those lines, but wasn't sure.
Re: Valve length question [Re: Thumperdart] #1482078
08/09/13 01:34 PM 08/09/13 01:34 PM
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Nitrojunkee Offline OP
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Pettis put 2.19 valves in my home ported rpm`s and everything`s great so far w/a .680-.660 Isky solid roller however the installed height leaves a bit to be desired.



Nice! I'm actually doing some home bowl work, and mild porting myself as well. I'd like to see 300-310cfm @ .600 lift, with the 2.19's and my bowl work/porting. We'll see what the flow bench comes back with lol.
Re: Valve length question [Re: Nitrojunkee] #1482079
08/09/13 02:45 PM 08/09/13 02:45 PM
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Thumperdart Offline
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Not sure what mine flow and don`t really care but the bigger valve along w/good bowl work and valve job should be a good improvement........

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Valve length question [Re: Thumperdart] #1482080
08/09/13 03:36 PM 08/09/13 03:36 PM
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Nitrojunkee Offline OP
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Quote:

Not sure what mine flow and don`t really care but the bigger valve along w/good bowl work and valve job should be a good improvement........



By the way, who's valves did you go with? Are you using titanium retainers?
Re: Valve length question [Re: Nitrojunkee] #1482081
08/09/13 03:47 PM 08/09/13 03:47 PM
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Thumperdart Offline
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I think they were SI valves but not sure honestly and my retainers are 13+ year old TI from Isky.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Valve length question [Re: Nitrojunkee] #1482082
08/09/13 10:23 PM 08/09/13 10:23 PM
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Thumperdart Offline
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Quote:



Pettis put 2.19 valves in my home ported rpm`s and everything`s great so far w/a .680-.660 Isky solid roller however the installed height leaves a bit to be desired.



Nice! I'm actually doing some home bowl work, and mild porting myself as well. I'd like to see 300-310cfm @ .600 lift, with the 2.19's and my bowl work/porting. We'll see what the flow bench comes back with lol.

If you really want to maxamize the intake port do away w/as much p-rod pinch as you can or sleeve it so you know how far you can go.........Mine are very thin but if I did it again I`d do as suggested w/the sleeves.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Valve length question [Re: Thumperdart] #1482083
08/09/13 10:43 PM 08/09/13 10:43 PM
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Nitrojunkee Offline OP
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If you really want to maxamize the intake port do away w/as much p-rod pinch as you can or sleeve it so you know how far you can go.........Mine are very thin but if I did it again I`d do as suggested w/the sleeves.



Gotcha. Thanks for all the info!

Re: Valve length question [Re: Nitrojunkee] #1482084
08/09/13 10:46 PM 08/09/13 10:46 PM
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pittsburghracer Offline
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Quote:



If you really want to maxamize the intake port do away w/as much p-rod pinch as you can or sleeve it so you know how far you can go.........Mine are very thin but if I did it again I`d do as suggested w/the sleeves.



Gotcha. Thanks for all the info!



Tubing
http://ksmetals.com/RetailLocations.html

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: Valve length question [Re: pittsburghracer] #1482085
08/09/13 10:58 PM 08/09/13 10:58 PM
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Thumperdart Offline
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State of confusion
Quote:

Quote:



If you really want to maxamize the intake port do away w/as much p-rod pinch as you can or sleeve it so you know how far you can go.........Mine are very thin but if I did it again I`d do as suggested w/the sleeves.



Gotcha. Thanks for all the info!



Tubing
http://ksmetals.com/RetailLocations.html



That be it............off to go beat on my this weekend so have fun.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

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