i got a 83 Recaro T/A will 3 inch exhaust with a flowmaster 80's series and dual k and n becuase its a CFI injected motor and i got moroso wires and bosch platinum 4 plugs and new accel cap and rotor and accel super coil and a fresh 305 with 9.6:1 compression with 12k on the motor and about a 215 degree cam in it with a 700r4 and 3.23.... so if i switch to 3.73 what will the difference be at the track, how much better will my car run in the quarter. also what will my car be very driveable on the highway still? right now i run about 70mph at 2000 rpms in the last gear! thanxs guys u r the pros of third gens!
recaro xfire

 

I would say they would drop your time by .2-.3 in the 1/$4. With OD the car will still be drivable but you probably won't want to always drive 70, you would be around 2500rpm. How tall are your tires. The taller the tire the less rpm's you'll run. Right now I have 25" tall and will be going to 27" when I get the money.

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4 vette servo and .500 boost valve
B&M Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3" Hooker Aero Chamber

 

yeah it seems like lower gears (numerically higher) work well with 4 spd auto trannies. with 3.73:1 in the ends you shouldn't be reving too high. Imagine all those guys with 3.73 or more in their rear ends with turbo 400 or turbo 350 trannies.

 

thanxs guys for the info...
i recently ran into a 68 firebird for sale for 2k and i think i might buy it so the mods on my 83 ta might have to wait awhile!
but who the hell knows maybe i wont get it and then ill be back to modifing my car again!anyways thanxs again for sharing the info!
recaor xfire

 

I would get the firebird, if it's in decent shape, those cars are sweet lookin.

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4 vette servo and .500 boost valve
B&M Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3" Hooker Aero Chamber

 

Well, I know a guy that had a 97 Z28 w/2.73 gears that ran a 13.90 but when he put in 3.73 gears, he ran a 13.00. 2.73 to 3.73 is a BIG change!

 

Yeah, 2.73s to 3.73s are going to be a big difference for a LT1, not a CFI Recaro T/A. 3.73s aren't going to shave 9 tenths of a second off a CFIs ET. On the LT1....more than likely, yes. Aren't LT1s great?

I would definitely recommend 3.42 or 3.55 gears, that could take a few tenths off your ET, but the 3.73s are way too much.

I thought 4.10s would make my car run a lower ET, when it just made it run slower! But it sure is more fun to drive on the street. Not on snow though....

-ws6formula-

[This message has been edited by ws6formula89 (edited September 03, 2001).]

 

so what ur saying is the acceleration increases as the gears get lower 3.73's for example. but i got to do it in modesty? ok well i think 3.42's would be good but the 3.73's sound like they still got good results!
thanxs guys for the help!
recaro xfire

 

Yes, 2.73 to 3.73's is a big change, but this guy already has 3.23 gears so the change wouldn't be as dramatic.

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

I don't have it with me, but Chevy High Performance with their "My Generation Camaro", '87 LG4 w/2.73's stock, had their biggest single gain by going to 3.73's (and posi), about 1/2 a second.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

Yeah I have the article too. It dropped the time by .47 in the 1/4.

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite