Re: What to change about my car for n/a
[Re: Clanton]
#2717596
11/19/19 04:18 PM
11/19/19 04:18 PM
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Joined: Jan 2003
Posts: 14,478 So. Burlington, Vt.
fast68plymouth
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Well, not what my preference would be.
I’d put even thicker gaskets on it.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What to change about my car for n/a
[Re: fast68plymouth]
#2717601
11/19/19 04:27 PM
11/19/19 04:27 PM
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Joined: May 2011
Posts: 4,488 northern,Ohio,USA
Clanton
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Well, not what my preference would be.
I’d put even thicker gaskets on it. I have an .080 That I have used.My duration on the cam is 260/269 at .050
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Re: What to change about my car for n/a
[Re: Clanton]
#2717602
11/19/19 04:28 PM
11/19/19 04:28 PM
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Joined: Jan 2003
Posts: 13,319 Marion, South Carolina [><]
an8sec70cuda
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How big is this motor again?
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: What to change about my car for n/a
[Re: Clanton]
#2717604
11/19/19 04:33 PM
11/19/19 04:33 PM
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Joined: Jan 2003
Posts: 13,319 Marion, South Carolina [><]
an8sec70cuda
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Whew, ok...you have some potential. Thankfully it isn't a 500+" stroker.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: What to change about my car for n/a
[Re: Clanton]
#2717611
11/19/19 05:18 PM
11/19/19 05:18 PM
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Joined: Jan 2003
Posts: 14,478 So. Burlington, Vt.
fast68plymouth
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I Live Here
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I’d put the .080’s on, and either replace the cam or get it reground.
446, zero deck, .080 gasket, 20cc dish, 72cc head........ 9.08:1 If you got the heads up to 75cc...... then it’s 8.87:1.
If the cam is shorter, then you can make more boost while turning the blower slower......which builds less heat.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What to change about my car for n/a
[Re: fast68plymouth]
#2717614
11/19/19 05:38 PM
11/19/19 05:38 PM
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Joined: May 2011
Posts: 4,488 northern,Ohio,USA
Clanton
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Well that was on the list of options but I wouldn't know where to go with it on lift,dur.I have heavy springs in the heads[280/680#] that I wanted to swap for my old .590 lift cam springs barely used. ps:The springs on my head are PSI DR1260ML minus the damper spring. I’d put the .080’s on, and either replace the cam or get it reground.
Last edited by Clanton; 11/19/19 06:05 PM.
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Re: What to change about my car for n/a
[Re: Clanton]
#2717615
11/19/19 05:43 PM
11/19/19 05:43 PM
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Joined: Jan 2003
Posts: 14,478 So. Burlington, Vt.
fast68plymouth
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The lobe profile and rocker ratio has the biggest influence on how much spring you can get away with(along with how high you need to rev the motor).
For a street/strip car with a roller, there are certainly profiles available that will work and live just fine with less than 280/680.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What to change about my car for n/a
[Re: Clanton]
#2717680
11/19/19 09:01 PM
11/19/19 09:01 PM
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Joined: Oct 2007
Posts: 4,205 New York
polyspheric
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Wrong cam for a blower, too hot for your CR.
Boffin Emeritus
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Re: What to change about my car for n/a
[Re: polyspheric]
#2717685
11/19/19 09:10 PM
11/19/19 09:10 PM
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Joined: May 2011
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Clanton
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I will never get the chance to show otherwise so ok.I had fun. Wrong cam for a blower, too hot for your CR.
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Re: What to change about my car for n/a
[Re: Clanton]
#2717709
11/19/19 09:53 PM
11/19/19 09:53 PM
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Joined: May 2011
Posts: 4,488 northern,Ohio,USA
Clanton
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Here is the 2nd cam I put in my engine back in 2005 SFT
Last edited by Clanton; 11/19/19 09:59 PM.
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Re: What to change about my car for n/a
[Re: Clanton]
#2717739
11/20/19 12:03 AM
11/20/19 12:03 AM
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Joined: Jan 2003
Posts: 14,478 So. Burlington, Vt.
fast68plymouth
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That roller could easily be reground to something more suitable for street/strip use a blower, that would also work with lower spring pressure.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What to change about my car for n/a
[Re: fast68plymouth]
#2717799
11/20/19 10:41 AM
11/20/19 10:41 AM
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Joined: May 2011
Posts: 4,488 northern,Ohio,USA
Clanton
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I should give Comp a call to see what they say,recommend,cost,turn around time,spring recommendation so I can make a plan going forward.
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Re: What to change about my car for n/a
[Re: Clanton]
#2717823
11/20/19 12:07 PM
11/20/19 12:07 PM
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Joined: Jan 2003
Posts: 14,478 So. Burlington, Vt.
fast68plymouth
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I Live Here
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You can’t(shouldn’t try to) change the lift very much with a regrind on a roller since there is a good chance of grinding through the heat treat. If you wanted a roller with .550 lift, you would start out with a different core. Still, your current roller can be reground into something smaller/milder that would work fine in that application. You could put the solid back in as well........ it’s closer to the right size....... but wouldn’t make as much power as a correctly sized roller. My goal n/a was to go 11.50 with my current parts but by my results it is not going to happen Yeh...... you’re pretty far away from that, and likely not easily cured without spending some real $$. Cam, gears, converter, and probably headers.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What to change about my car for n/a
[Re: fast68plymouth]
#2717832
11/20/19 12:51 PM
11/20/19 12:51 PM
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Joined: May 2011
Posts: 4,488 northern,Ohio,USA
Clanton
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I like using a solid roller so I will stick with it.I have no idea how much I can regrind the cam to so thank you for your info! and help!I am looking at some roller cam,spring rates just to get an idea of what I may need like the Comp 23-703-9 .582/.588 110 that would need a spring 953-16 200# seat 496# rate and I will test my other springs I have to see if they will work to help plan.I need to have my roller lifters looked at to check their health to re-use. ps:Here are 2 springs I have .1 is a 943 at 550# inch and the white stripe I am not sure of
Last edited by Clanton; 11/21/19 06:47 PM.
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