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07-25-2011, 10:18 AM
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#1
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Hooking a 2nd gen
Working on a recently built 75 T/A that just refuses to hook off the line. It's a bracket car, so it's gutted, bat and cell in truck. Will go anywhere from a 3/4 to almost getting a full rotation before it will leave, so reaction times are all over the place.
Have the front shocks (8 way adjutable) set for full weight transfer and the rear at mid setting. Has all Hotchkis bars and such.
Was running goodyears, switched to QTPs and nothing changed. Played with compression, rebound etc, burnout, tire pressure, all the "normal stuff" It's not the track, lots of other 10 and quicker cars having no issue with same tires and and same or higher stall, this thing doesn't want to plant the tire!
Know we have a few of these here, open to suggestions.....
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
Last edited by Pampered-Z; 07-25-2011 at 10:19 AM.
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07-26-2011, 08:20 AM
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#2
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Join Date: May 2010
Location: Brick, NJ
Posts: 1,868
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maybe a little to light in the rear....or not getting enough wieght transfer
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Formerly known as blk95formula
86t/a_ram_air on TGO
2018 Silverado 1500
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07-26-2011, 02:02 PM
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#3
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Got any videos? Did you scale the car?
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07-26-2011, 07:26 PM
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#4
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Join Date: May 2005
Location: under a roof
Posts: 2,034
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What kind of rear suspension?
edit: one more, what kind of times should it be running?
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1973 Chevy Nova - best e.t.-10.04 - currently disassembled
1989 Pontiac Trans Am GTA
2016 Dodge Durango R/T
2015 Ram 3500 Dually Cummins
Last edited by mc73nova; 07-27-2011 at 04:30 PM.
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07-27-2011, 02:47 PM
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#5
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Power Member
Join Date: Sep 2008
Location: Hackettstown, NJ
Posts: 1,632
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Look into Calvert Racing Cal-trac bars.
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1998 Z-28 - SLP lid - Ported TB - LS6 Intake - Dynatech SS headers/Catted Y - Magnaflow Exh - 3.42 - Yank SS3600 - UMI weld-in subframe connectors, Adj LCA, Adj PHB, Q1A TA - Bolt-in Relocation Brackets - Strano springs - Koni shocks - 17" C6Z06 wheels - 326HP/335ft-lbs - 12.35 @ 110.41
Quote:
Originally Posted by Blackbirdws6
I can appreciate a dream but this person needed some real friends.
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07-28-2011, 11:56 AM
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#6
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Car is low 10's normal dail in 10.25-10.30s. Runs summit points, so this unpredicted spin reults in loosing a few in the 60's and hard to feel from the driver's seat is costing round wins.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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07-29-2011, 10:09 PM
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#7
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Join Date: May 2005
Location: under a roof
Posts: 2,034
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I race with a guy who has a '78 with stock rear springs and slapper bars that does 10's and hooks. I can check out his car to see what he is using front and back. I had slide-a-links on my '77 but it was only a 12.50 car. The biggest issue is weight transfer. I know Cal Trac wants you to have at least 5" of front travel for the rear suspension to work properly. I have Cal Tracs w/split mono leaf and Rancho 9000's on my Nova and they work excellent but I see stock style suspension cars in the 10's all day. I had to get Moroso trick springs for the front with Comp Eng 3 ways.
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1973 Chevy Nova - best e.t.-10.04 - currently disassembled
1989 Pontiac Trans Am GTA
2016 Dodge Durango R/T
2015 Ram 3500 Dually Cummins
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08-17-2011, 09:11 AM
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#8
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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We have done a bunch of these cars.. Corner weights, preload on the bars, and shock settings are really important in controlling a leaf spring suspension..
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JSSPEEDANDCUSTOM.COM
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08-18-2011, 10:37 AM
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#9
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Had the car scaled, spring changes and shock adjustments and added a RPM controller ( foot brake "cheaters" hand control as they refer to it!) and the car is doing allot better.
The changes addressed the front suspension was too loose and too limited in the rear.
Seemed good last weekend during TNT until the rain came.
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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08-22-2011, 12:04 AM
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#10
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Join Date: Apr 2007
Posts: 12
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Weight transfer is hard with a 2nd gen with little weight on the rear tires and a long heavy nose. Cal-tracs are helpful, but I always get better times with a full tank of gas hanging as much weight behind the rear tires. Another thing that really helps the 2nd gen even more than other models is free moving front suspension... Del-a-lum control-arm bushings and disconnecting the front sway bar will make a world of difference.
mike
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 1973 RS Z28: 401ci Dart Little M, Littlefield 8-71 supercharger @14lbs boost, Callies Magnum crankshaft, Lunati Pro-Mod rods, JE pistons, 7.8:1 compression, AFR 227 Comp heads, T&D 1.6 shaft rockers. Reed solid FT cam (240/250@.050, .523/.542 lift, 112 LSA), QFT 750 carbs, Lemons headers, Mezier mechanical water pump, Tremec TKO-500 5-speed, Moser 12 bolt, 33 spline axles & 3.42 gears.
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