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#81
05-14-2012, 12:51 PM
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 Pretty sure if these two spec out on the open the rest are the same . They only have 7 passes on them, I have a lever to remove them, but never seen one that u use to check pressure too? Cool, Probably expensive
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74  2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#82
05-14-2012, 04:39 PM
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Well Checked my open pressure of my new springs and their both at 388 at 1.150, the old springs that were in the car for 4 years tested at 366 , 370 open of the two i just pulled from the box. The seat pressures on those at 1.75 were 130, and at 1.795 ,verified today with my new comp micrometer, man i love that tool, where mine Have been set at since i got the heads were about 120, and the grandville pulled hard to 5800 last year with those springs. So I think I will be fine at 145 seat and 388 open, Plus Dave said I would be
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#83
05-14-2012, 04:56 PM
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Race car application, 6000+ operation. Famous Clint Eastwood line.... "I know what you're thinking. "Did he fire six shots or only five?" Well, to tell you the truth, in all this excitement I kind of lost track myself. But being as this is a .44 Magnum, the most powerful handgun in the world, and would blow your head clean off, you've got to ask yourself one question: "Do I feel lucky?" Well, do ya, punk?"
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#84
05-14-2012, 05:17 PM
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Related, and just for conversation here around the coffee table.... consider the BIG differance in the Old Faithfull cam that makes peak power typically up to 5400-5500 rpm, and with the common comments from the owner with a street/strip car ... "I have rev'ed it up to 6000 on occasions, I hear no issues... and the Road Paver cam that makes peak power around 5800 rpm and will operate in a dedicated drag race car with 6000+ operation on a consistant basis.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#85
05-14-2012, 05:19 PM
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Comp had me set mine up at 200 seat and 600 open!Tom
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#86
05-14-2012, 06:58 PM
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#87
05-14-2012, 07:17 PM
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As an example, not a recomendation, but it carries forward to the 'tune' of the immediate conversation... Tom's RAV engine and the potental rpm involved or a drag strip only application
 Crower 68380-2 spring will give you ABOUT 197 seat pressure at 1.800", 1.460" diameter. As always, NEED TO TEST THEM ! That amount was according to a Crower rep, not a catalog or website figure. That and also consider that specific spring has a ton of valve lift capability, not good for many at a lower valve lift. Plus the rate might be a bit stout, but each will need to evauluate that with your favorite cam tech rep. It was only a example for a spring at that amount of desired pressure. .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 05-14-2012 at 07:24 PM. |
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#88
05-14-2012, 07:55 PM
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Just some more food for thought for this thread. I talked to a comp tech today about using my road paver cam , but only with their endurax solids instead, thought i would get better feedback instead of saying using someone elses solids, anyway he said about 150 on the seat and 400 open, he said i could go a tad higher on both but not much, no more than 430 open. He also said that my 145 seat and 388 is fine, and that was shifting it at 6000, If it had hyd rollers than 130 seat and 350 open would be fine.
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#89
05-14-2012, 08:12 PM
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Sounds like you will be on your way soon. LOL
GT. |
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#90
05-14-2012, 08:17 PM
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Quote:
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#91
05-14-2012, 08:30 PM
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my RA V heads and my 63 421 SD heads use 2in installed height.They were setup with 200 on the seats.I know we used Isky springs on one set.Rick Johnson supplied springs on another set.I believe Reath Automotive did another set.Tom
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#92
05-14-2012, 08:38 PM
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lifter way, Nutsville is just the longer trip round a bought way. I can't wait to here your reply of 10:teens when it happens And you get this all figured out. Isn't this hobby a blast. GT. |
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#93
05-14-2012, 08:57 PM
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#94
05-14-2012, 08:58 PM
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I am going to the solid lifter way, going to be running the crowers on my road paver cam ... 10 teens? Lets get the car running first ,lol
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#95
05-14-2012, 08:59 PM
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Did not say one way or the other, but he didn't ask why i would be doing something like this, so all good?
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#96
05-15-2012, 07:22 AM
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Good luck Darby.
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Conrad 79 Trans AM 406 #12 heads Torker II intake Crower 60210 750 holley vac. sec. T400 3500 Stall 3:73:1 rear.  ECMTTFMFers. IHTTFMFers.
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#97
05-15-2012, 01:44 PM
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Just out of curiosity why not just run a similar SR lobe cam than solids on a HR cam? Surely a lobe close enough-now I understamd if the cam is already in the motor but to start off that way.
Like running SFT lifter on a HFT cam-got to be a engineering reason they make them different on the ramps.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#98
05-15-2012, 02:03 PM
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From what I have seen the SR lobes have a lot less adv duration therefore creating a much more agressive ramp even if the @ 50 is the same. My point is I doubt that you'll be able to find a SR lobe that is close to the cams mentioned in this thread. However, if you chose a SR cam with similair 050 specs that cam is going to make a ton more power. |
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#99
05-15-2012, 03:33 PM
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Quote:
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#100
05-15-2012, 05:31 PM
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If I was just starting out maybe i would, but since this car has been all together i won't
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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