Is there a direct or near-direct replacement for our POS rears?
05-21-2001, 12:03 PM
#1
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Is there a direct or near-direct replacement for our POS rears?
Well I'm making plans for a 383 swap into my snail of a car, and I've heard from several sources that the 9 bolt 7.xx inch rear in my car won't hold the power. (Expecting over 400hp) Anyway, is there any direct or easy to install replacement for third gen rears? It also needs to be realitivly strong. Any ideas?
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'89 Firebird Formula 350
L98, WS6, Red/grey, t-tops, and a 3.27:1 rear
K&N, TB bypass, no MAF screens, CAI, full Accel ignition, no cats, Hooker Supercomp shorties, Hooker 3-inch catback
ET? The POS runs 15s.
Also own '83 Firebird 2.8 2bbl. 155K miles.
ET? Break out the calendar!
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'89 Firebird Formula 350
L98, WS6, Red/grey, t-tops, and a 3.27:1 rear
K&N, TB bypass, no MAF screens, CAI, full Accel ignition, no cats, Hooker Supercomp shorties, Hooker 3-inch catback
ET? The POS runs 15s.
Also own '83 Firebird 2.8 2bbl. 155K miles.
ET? Break out the calendar!
05-21-2001, 12:37 PM
#2
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Location: Mpls, MN USA
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Car: 88 Camaro
Engine: 427 BBC
Transmission: T400
The 9 bolt is better than the 10 bolt. My stock 9 bolt has held up with 500hp/520lbft. It has ~25 1.7x launches with slicks and another 15 or so 1.8x launches with street tires.
Other choices are 12 bolts (very good), and 9 inchers (even better).
Miles
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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon
)
www.koolmeister.com
Other choices are 12 bolts (very good), and 9 inchers (even better).
Miles
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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon
)www.koolmeister.com
05-21-2001, 08:22 PM
#3
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Location: Red Bud, Illinois
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Car: 1989 IROC-Z
Engine: 383
Transmission: Pro-Built 700R4 2400 ACT Stall
Axle/Gears: 2.77 Borg Warner 9-Bolt
I'd say it's okay to bet the 9 bolt will hold up. I've seen a 9 bolt hold up to 500+ ft-lb of torque. So i imagine it's fairly strong. Heh.
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89 IROC-Z 350 TPI
-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR
-Gutted Air Boxes
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89 IROC-Z 350 TPI
-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR
-Gutted Air Boxes
05-23-2001, 08:16 AM
#5
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Location: Saugerties, NY, USA
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Car: '89 Formula
Engine: 355 TPI
Transmission: T56
Axle/Gears: 3.70 9 bolt.
'89 TTA's came with Dana 44 rears. Any that ame without them are some kinda freaky thing.
http://www.slponline.com/view_produc...RTNUMBER=64000
Steve Spohn (look at the top of the screen for sponsers to this site) has new Moser 9" and 12 bolt assemblies. http://www.spohn.net/index.cfm?fusea...&categoryid=34
9 bolts will PROBABLY hold but don't know how long. They're better than 10 bolts (unless they're really built). Various people do say that 400 horses is about the limit.
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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.
http://www.slponline.com/view_produc...RTNUMBER=64000
Steve Spohn (look at the top of the screen for sponsers to this site) has new Moser 9" and 12 bolt assemblies. http://www.spohn.net/index.cfm?fusea...&categoryid=34
9 bolts will PROBABLY hold but don't know how long. They're better than 10 bolts (unless they're really built). Various people do say that 400 horses is about the limit.
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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.
05-23-2001, 08:33 AM
#6
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Location: NortCentral NJ, USA-
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89 TTA's did not come with dana 44 rears, except the indy pace car. They all came with 9 bolts. The Camaro performance book is wrong.
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Hybrid Black 5.7L 5 Speed
'95 Competition Yellow Corvette Coupe ZF6
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Hybrid Black 5.7L 5 Speed
'95 Competition Yellow Corvette Coupe ZF6
05-23-2001, 09:36 AM
#7
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Car: '89 Formula
Engine: 355 TPI
Transmission: T56
Axle/Gears: 3.70 9 bolt.
Blak92: I doublechecked and I stand corrected... Thank you. The Dana 44's came standard on the Firehawk tho!
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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.
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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.
Trending Topics
05-23-2001, 11:45 AM
#8
Supreme Member
My 89 305TPI has got a 9 bolt BW rear with 3.45's... It's MUCH thicker than my buddies 10 bolt in his 87 IROC.
Steve
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89 GTA G92
305 TPI WC 5spd w/3.45
Accel Cap & 8mm Taylor's
Custom 4" Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch TB Bypass - Steel Rad
Cat back 3" Exhaust w/Terminator Muff.
HiGh FlOw Dynomax Cat
Spohn LCA's - KYB GR-2's
Moroso Crank Bolt and roller pilot bearing.
New Fuel Pump!
Autometer Vac+Oil Temp
2000 Yamaha R1 150hp 385ibs
Steve
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89 GTA G92
305 TPI WC 5spd w/3.45
Accel Cap & 8mm Taylor's
Custom 4" Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch TB Bypass - Steel Rad
Cat back 3" Exhaust w/Terminator Muff.
HiGh FlOw Dynomax Cat
Spohn LCA's - KYB GR-2's
Moroso Crank Bolt and roller pilot bearing.
New Fuel Pump!
Autometer Vac+Oil Temp
2000 Yamaha R1 150hp 385ibs
05-23-2001, 08:36 PM
#10
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Location: St. Charles, IL USA
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Times in my sig were made with the stock 9-bolt using SLP 3.70's and MT slicks. No problems, even when I replaced it with my Dana 44. New owner of the 9-bolt is happy...
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1989 T/A, 400" CNC Bow-Tie tall-deck, JE 8.5:1 pistons, Scat H-beam 6" rods, Scat 4340 crank, Crower roller cam, AFR heads, Tiffin Racing sheetmetal intake, Holley 75mm t/b, DFI, variable injector controller, 72# inj., S/X dual-pump fuel system, Hahn Racecraft T76 single turbosystem, NOS 150-hp dry fogger, TH400 w/GV overdrive, Dana 44 w/Detroit Locker and 3.70's, Baer Track brakes, Simmons FR 18X9 and 18X10 wheels, P265 and P285/35ZR18 Nittos, Spohn suspension, Eibach racing springs w/adjustable-height collars, billet camber/caster plates, KYB AGX adjustable shocks/struts, Corbeau Targa RS seats, TeamTech 5-point harnesses, Sparco steering wheel, MacEwen white gauge overlays, Phantom gauges/tach, B&M Pro Stick w/carbon-fiber ****, REAL carbon-fiber dash/console kit (don't ask), S&W 8-point rollbar, Lonza aluminum pedal covers, Pioneer/Boston Acoustics stereo system, filled side markers, Audi fender marker lights, IMSA-style cowl hood (don't ask), custom medium Intense Blue pearl paint, tinted glass. Whew!
Best ET w/383" S-trim: 10.796 @ 125.8 mph
Best ET w/400" turbo, nitrous: Summer 2001
Member of Midwest F-Body Association www.mfba.org
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1989 T/A, 400" CNC Bow-Tie tall-deck, JE 8.5:1 pistons, Scat H-beam 6" rods, Scat 4340 crank, Crower roller cam, AFR heads, Tiffin Racing sheetmetal intake, Holley 75mm t/b, DFI, variable injector controller, 72# inj., S/X dual-pump fuel system, Hahn Racecraft T76 single turbosystem, NOS 150-hp dry fogger, TH400 w/GV overdrive, Dana 44 w/Detroit Locker and 3.70's, Baer Track brakes, Simmons FR 18X9 and 18X10 wheels, P265 and P285/35ZR18 Nittos, Spohn suspension, Eibach racing springs w/adjustable-height collars, billet camber/caster plates, KYB AGX adjustable shocks/struts, Corbeau Targa RS seats, TeamTech 5-point harnesses, Sparco steering wheel, MacEwen white gauge overlays, Phantom gauges/tach, B&M Pro Stick w/carbon-fiber ****, REAL carbon-fiber dash/console kit (don't ask), S&W 8-point rollbar, Lonza aluminum pedal covers, Pioneer/Boston Acoustics stereo system, filled side markers, Audi fender marker lights, IMSA-style cowl hood (don't ask), custom medium Intense Blue pearl paint, tinted glass. Whew!
Best ET w/383" S-trim: 10.796 @ 125.8 mph
Best ET w/400" turbo, nitrous: Summer 2001
Member of Midwest F-Body Association www.mfba.org
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