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#1
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New 3.73 on 3.23 carrier?
Customer wants 3.73 gears in his 65 BOP 8.2 Vista Cruiser. He does not want to put a new posi in it. What are my options? Currently has 3.23.
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#2
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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 |
#3
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https://www.randysworldwide.com/reso...arrier-breaks/ You will have to change carriers for a 3.73 gear.
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#4
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you cudda asked dad
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GOOD IDEAS ARE OFTEN FOUND ABANDONED IN THE DUST OF PROCRASTINATION |
#5
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OUCH! That had to hurt.
LOL! Happy Holidays to Ken and Crocie Jr. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#6
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Quote:
Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#7
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You need a 3.36--4.33 carrier to do it without a spacer. An 8.2 is weak enough as it is, so I would either find the right carrier, or upgrade to a later 8.5 rear end.
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Jeff |
#8
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Ken you know parents never know anything!
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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 |
#9
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Unfortunately the 8.2 isn't popular enough for the aftermarket to make thick ring gears for the 3.23 and down carriers. That would be the easiest but as far as I know they aren't out there for this application.
You'll either have to add a spacer for the ring gear, or buy a new carrier for 3.36 and up gears. |
#10
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Thanks Tom! Happy Holidays to you and yours.
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#11
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I've seen an early Vista Cruiser rear and it looked stronger than the regular BOP 8.2 rears, can't remember if it had better axles.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
#12
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The way the BOP carriers are designed, you need a NEGATIVE spacer to install a3.36 and up on a 3.23 and down carrier. I researched that 40 years ago for an article I was writing, and as a possible new part to sell for H-O Racing,
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GOOD IDEAS ARE OFTEN FOUND ABANDONED IN THE DUST OF PROCRASTINATION |
#13
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I bet those "Negative Spacers", LOL, are not cheap and hard to find too.
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#14
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Dad was right the whole time! Cant seem to find the Negative spacer anywhere!
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#15
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Time to swap in a 4 pinion 3.23 to 4.33 Limited Slip Differential into the housing, right.
Practically every one of the TRI-POWER GTOs had a 3.23 (most likely 3.55 gear LSD unit in them, most were a 2 pinion one. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#16
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All due respect, this is incorrect. The range goes like this for the original 8.2 in these A body cars: 2:56- 2:78 share a carrier, 2.93-3.08-3.23 share the same carrier, and 3.36-3.55-3.90-4.33 share the same carrier. Every original Tripower GTO I have seen with a stick had a 3.55 in it. In fact, in 45 years, haven't seen a real TP car with a 3.23 rear end...ever. Not saying they weren't built, but saying that almost every one of them came with a 3.23 has not been my experience on this planet.
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Jeff |
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