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06-17-2013
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Powershift almost turns into powershit:)
Out in the 90....siamesed plenum ported into the head, cams, headers, blah blah blah you get the picture.
I have always wondered about powershifting and how you can do it at such high RPM; did not seem feasible to execute although we have seen the Rocket and heard stories of minneker After some messing around, I ran the car up to 7K hammer down, no lift, bounced the clutch off the bottom, while slipping into second....... WHAM! Perfect execution, but the bull sent me a subtle reminder that you have to ride for the full 8 seconds......as the clutch engaged there was a violent right to left toss of the back end of the car as the power came back through to the rear wheels; needless to say I was alittle more "awake" than before the run and after that little escapade I am not sure I will try it at the track. Got to get some projects done so I can get this thing on the dyno; even at $4.80 a gallon it does not get any better than this!
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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06-17-2013
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#2 |
 
Join Date: Jul 2005
Location: Cresson, TX
Posts: 970
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Re: Powershift almost turns into powershit:)
Do you have C-Beam Plates? Helps the fish-tailing...
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Ron Hanselman Founding Member #80 CM Lifetime Member #1093 1991 #383 Twin Turbo 1993 #099 Ruby, Jeal 368 w/Snake Skinner body 1961 White with Red Int |
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06-17-2013
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#3 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Powershift almost turns into powershit:)
I do not.....it is a 143K mile car(motor is 3-4K)......its had some suspension freshing but might need more. The amount of torque the car has seems to be pretty impressive, dissolves tires.......will see what the #s come out as, I hope its not a big let down
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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06-17-2013
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#4 |
  
Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Re: Powershift almost turns into powershit:)
Sounds like a fun day
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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06-17-2013
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#5 | |
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Join Date: Jul 2005
Location: Cresson, TX
Posts: 970
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Re: Powershift almost turns into powershit:)
Quote:
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Ron Hanselman Founding Member #80 CM Lifetime Member #1093 1991 #383 Twin Turbo 1993 #099 Ruby, Jeal 368 w/Snake Skinner body 1961 White with Red Int |
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06-18-2013
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#6 |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Powershift almost turns into powershit:)
Jim Ingals mentioned at one of the gatherings in BG that he power shifts at 6300 rpm on stock ZR-1s. He highly recommends it for best ETs, but then too if it breaks, he just tosses the keys to one of the GM minions and says "Its broke! Go find out what broke and let me know!"
Beam plates...seemed to have helped noticeably on mine. Clue: oval-shaped bolt holes in the differential end of the C-beam attested to some squirming going on, prior to installing the plates. FWIW, P.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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06-18-2013
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#7 |
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Join Date: May 2011
Location: Sydney, Australia
Posts: 2,479
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Re: Powershift almost turns into powershit:)
Lee, That had to be fun.
Gas price: extremely stupid. Permagrin: Priceless.
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Robert J. DeMarco [SIGPIC][/SIGPIC] [COLOR=blue]G[/COLOR][COLOR=red]rand[/COLOR] [COLOR=blue]S[/COLOR][COLOR=red]port[/COLOR] Registry Lifetime Member NCM Lifetime Member #2655 Pacecar Registry Member [COLOR=red]ZOOM Charter Member - ZR-1 Owners of Michigan[/COLOR] [COLOR=plum][I]ZR-1[/I] Registry member since 2012 [/COLOR] [COLOR=black]1990 LPE "368" Aerobody ZR-1, Last ZR-1 built by John[/COLOR] 1991 Callaway Aerobody ZR-1, DRM 500 1991 Shinoda Aerobody Spyder, 1998 Pace Car |
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