How Much Does It Cost to Change Gear Ratios on Monte Carlo Ss

#981570 - 08/28/13 03:ten AM

Rear stop gears question!!

Member

Joined: Jun 2013
Posts: 71
Lancaster(Boondocks), NY

then i accept a 1986 monte carlo ss clone, and i ran it at my local i/8 mile rail today and ran a 10.2 prety consistantly. oh and a little backround on the motorcar might assist you guys answer this question, my auto was a SC i fabricated an SS outta, it is my starting time car. it has a stock 350 jasper and a 350 tranny, both fresh. so i accept the stock GU1 rear cease in my car, which is 2:41 gears, i ran a 1985 monte ss with 3:73'southward and same motor/tranny every bit me and he ran 8.9. so if I change my rear finish gears to iii:73 or 4:eleven would my car run in the high 8'southward low 9's? would rear cease gear change brand that much or a difference practice y'all think? all and any input apprechated (oh and PS pardon my typos, i cannot spell to save my life)

Terminal edited by Maxx Mackey; 08/28/xiii 03:11 AM.

86' SS 350 Motor/Tranny
If a visitor advertises something as "indestructible", Trust me, I'thou the guy you want testing it.

#981593 - 08/28/13 01:28 PM Re: Rear cease gears question!! [Re: 1986SSclone]
Joined: Aug 2007 Posts: ane,786 88ss408 10+ Year
10+ Year Member Joined: Aug 2007 Posts: one,786 miramichi, NB	yeah 3.73 or 4.10 would brand a large departure over the ii.41 you have at present . 1988 monte carlo ss 408 sbc ----------------------------------------------------- 1984 monte carlo cs 400 sbc

#981604 - 08/28/xiii 03:11 PM Re: Rear terminate gears question!! [Re: 1986SSclone]
Joined: Jun 2013 Posts: 71 1986SSclone Fellow member
Fellow member Joined: Jun 2013 Posts: 71 Lancaster(Town), NY	But do you call up the car will run in the low 9's? Would it really make that big of a difference? Last edited by Maxx Mackey; 08/28/xiii 03:12 PM. 86' SS 350 Motor/Tranny If a company advertises something as "indestructible", Trust me, I'm the guy you want testing information technology.

#981622 - 08/28/xiii 06:10 PM Re: Rear cease gears question!! [Re: 1986SSclone]
Joined: May 2008 Posts: 126 Arti Member
Member Joined: May 2008 Posts: 126 Long Island NY	It's the ratio of how many times the drive shaft turns to how many times the axle turns and is fix up past choosing how many teeth are on the ring and pinion gears. Bottom line, the higher the ratio, the more power (Torque actually) at the rear wheels, also the higher your engine runs (RPM's) and the poorer your gas mileage. But yep y'all at least have quicker sixty pes ET's. Torgue get you of the line fater and if your running 1/eighth mile yeah Torque is king. As for running in the 9's its all up to the automobile set up and suspension. Make certain the ability transfer to the rear wheels properly. Hope this helped.

#981836 - 08/31/13 12:38 AM Re: Rear end gears question!! [Re: 1986SSclone]
Joined: May 2002 Posts: 4,344 MAP 15+ Twelvemonth
15+ Year Member Joined: May 2002 Posts: 4,344 Yuma, AZ	Hello Maxx, If I were you, I'd driblet a computer model of the motor into a figurer model of the car/drivetrain, and let the reckoner requite me an answer. Failing that... I hold that unless the motor is tuned for very low-speed torque (and therefore for adept fuel economy,) and unless the TC stall speed is very high (extremely unlikely,) then a iii.42:i (ish) FDR would help your one/8-mile times. But, don't expect proficient cruising highway economy - here, the 2.41:one FDR would be far superior. As a general rule, the best overall FDR should vary in proportion to the motor's rpm of peak TQ. Best, MAP Last edited past MAP; 08/31/13 12:40 AM.

#982016 - 09/02/13 06:57 PM Re: Rear end gears question!! [Re: 1986SSclone]
Joined: May 2002 Posts: four,344 MAP xv+ Year
15+ Year Member Joined: May 2002 Posts: 4,344 Yuma, AZ	Hi Maxx, I checked the Jasper website. Bold you've got the 330 hp stock 350 motor which makes maximum TQ 374 lb-ft at 3,800 rpm, and so I would strongly advise against anything over 3.42:1 for the FDR with a THM-350 unless your intention is to drive the car exclusively on the track (which doesn't seem likely, otherwise you wouldn't have bought that particular motor.) And so, bold that the car will spend the majority of its time on the street and the minority on the track, then I wouldn't go over iii.42:1 for the FDR unless the price of keeping the car in petrol is immaterial to you, or you exercise the majority of your driving nether 40mph. Best, MAP Last edited by MAP; 09/02/13 07:03 PM.

#982219 - 09/04/13 09:26 PM Re: Rear cease gears question!! [Re: 1986SSclone]
Joined: Sep 2013 Posts: 12 CashMoneyMotorsports Inferior Member
Junior Member Joined: Sep 2013 Posts: 12 Annapolis, Md	We run iii:73 in the 84 MCSS with a 27" tall tire, turbo 350 tranny, and a very mild 350 small cake. It performs extremely well. Gas mileage sucks, merely its to be expected and part of the game..... 87 Pro Street MCSS. 800 plus HP 555 Engine By Scott Shafiroff & Reher Morrison Racing Engines, 400 Shot Capable Nitrous System, Full Comp Transmission, Trans Restriction, 5000 Converter, four:30 gears. MT Rubber, with 15x4 Frt & 15x15 Rear Polished Centerline Convo Pros. Custom Manufactory Dash, Autometer Guages, Adjustable Racing Buckets, Curlicue Cage.

#982226 - 09/04/13 10:15 PM Re: Rear end gears question!! [Re: 1986SSclone]
Joined: May 2006 Posts: 5,608 BuzzLOL Member
Fellow member Joined: May 2006 Posts: 5,608 Toledo, Ohio	. With a 2.41 rear end, yous prolly aren't even getting out of 2d gear in the 1/8 mile... or even reaching much over 1/ii RPMs capability in 2nd... a lower rear end ratio (higher numbers numerically, like iv.11 - 5.38:1) with posi could allow your engine to rev and HP out in two or even all three gears... giving much quicker one/viii times... but wouldn't be very suitable for long distance cruises... the 200-4R overdrive tranny, as others mentioned, tin can assist with that... . You tin can play effectually with this calculator to bank check out gearing vs RPM vs MPH possibilities: http://www.F-body.org/gears (striking 'clear correct' button before starting) . When you mentioned 350 Jasper engine, I thought maybe you meant a basic, depression RPM, 225grossHP @ 4200 RPM motorcar parts store rebuild... do you know its spec.south? . And, yes, to answer your bones question, if you have "the aforementioned engine and tranny" and then same rear stop gears (and similar tires and engine tune) every bit the other guy, then you should go the same one/8 times as him... of class, we usually try to discover an 'edge' and then we can beat the other guy... '86 Monte LS (total'd Autumn '2013), '87 GTA TransAm TPI350 TH700-R4, '85 Fiero 5-speed, '75 MG Midget Buick Alum.V8 BW v-speed manual, '77 Pontiac Astre Formula wagon v-speed posi, '78 F150 4WD 351"M ==> 400" C6, '79 Caddy Seville Olds EFI 350" TH400, 19' Slickcraft 425HP 351W MerCruiser I/O

#982329 - 09/05/13 09:36 PM Re: Rear finish gears question!! [Re: 1986SSclone]
Joined: May 2002 Posts: 4,344 MAP 15+ Year
15+ Yr Member Joined: May 2002 Posts: 4,344 Yuma, AZ	My recommendation for nothing over three.42:1 was for a 25.vi"-bore tire. Mapped to 27", that'due south the equivalent of a three.61:1 FDR, which is a miniscule 3% under the 3.73:1 yous're running, CMM. And your postal service hit the nail on the caput: the tradeoff is fuel economic system with performance. And so Maxx, information technology would seem you need to determine showtime and foremost, how important to you is fuel economic system. Too keep in mind that it might not take very long to keep such a car gassed-upwards to pay for the 200-4R that Fizz rightly recommends! But exist sure that the 200-4R is well-congenital. With that 4th OD gear, you could get the low-gearing advantage of a loftier numerical FDR, as well equally good highway cruising economy at the same fourth dimension. Best, MAP Final edited past MAP; 09/05/13 09:39 PM.

#982726 - 09/09/13 eleven:19 PM Re: Rear terminate gears question!! [Re: 1986SSclone]
Joined: May 2006 Posts: v,608 BuzzLOL Fellow member
Member Joined: May 2006 Posts: five,608 Toledo, Ohio	.. In this thread, yous can encounter what Deonte/Cuda/Official_MrGBody is getting by the i/viii mile marking with his 305" engine Monte: http://www.montecarloss.com/community/ubbthreads.php?ubb=showflat&Number=970616&page=2 '86 Monte LS (total'd Fall '2013), '87 GTA TransAm TPI350 TH700-R4, '85 Fiero 5-speed, '75 MG Midget Buick Alum.V8 BW 5-speed manual, '77 Pontiac Astre Formula wagon 5-speed posi, '78 F150 4WD 351"M ==> 400" C6, '79 Caddy Seville Olds EFI 350" TH400, 19' Slickcraft 425HP 351W MerCruiser I/O

#983093 - 09/14/13 01:23 AM Re: Rear stop gears question!! [Re: 1986SSclone]
Joined: Jun 2013 Posts: 71 1986SSclone Member
Fellow member Joined: Jun 2013 Posts: 71 Lancaster(Town), NY	Give thanks yous everyone for the responces, i have decided to go with 3:73's in the rear, and a 200R4 for the tranny... im not sure how much hp the motor makes, every bit i am the seccond owner, (motor has 16,000 on it i have paperwork on information technology). every bit far as gas milage goes i call up if i drive similar a lilliputian one-time lady i should be able to get what, maby 15 city? 86' SS 350 Motor/Tranny If a company advertises something as "indestructible", Trust me, I'm the guy y'all want testing it.

#983385 - 09/17/13 06:27 PM Re: Rear cease gears question!! [Re: 1986SSclone]
Joined: May 2006 Posts: v,608 BuzzLOL Member
Member Joined: May 2006 Posts: 5,608 Toledo, Ohio	. Maybe nine city... maybe 17 city... depends a lot on which 350" it is... '86 Monte LS (total'd Fall '2013), '87 GTA TransAm TPI350 TH700-R4, '85 Fiero 5-speed, '75 MG Midget Buick Alum.V8 BW five-speed manual, '77 Pontiac Astre Formula railroad vehicle 5-speed posi, '78 F150 4WD 351"K ==> 400" C6, '79 Caddy Seville Olds EFI 350" TH400, 19' Slickcraft 425HP 351W MerCruiser I/O

#983392 - 09/17/xiii 06:50 PM Re: Rear end gears question!! [Re: 1986SSclone]
Joined: Jun 2013 Posts: 71 1986SSclone Fellow member
Fellow member Joined: Jun 2013 Posts: 71 Lancaster(Town), NY	stock jasper 350, regular mild cam, 650 cfm carb, stock bore etc... 86' SS 350 Motor/Tranny If a company advertises something equally "indestructible", Trust me, I'm the guy you want testing it.

#983696 - 09/21/13 05:03 AM Re: Rear stop gears question!! [Re: 1986SSclone]
Joined: Sep 2013 Posts: 281 Rebelson101 Member
Member Joined: Sep 2013 Posts: 281 spring lake nc	if its a balmy 350 and you lot run a 200 and 3.73 gear i similar to run a 28 inch tire (275/60/15) not to tall nice and wide skillful footprint fairly priced and you should exist able (driving nice) to run into anything from 17 to twenty mpg i got 23 in a firebird with that setup and a 700r4. assuming your carb is properly tuned besides as engine timing ect..

#983756 - 09/21/13 08:30 PM Re: Rear cease gears question!! [Re: 1986SSclone]
Joined: May 2006 Posts: 5,608 BuzzLOL Member
Member Joined: May 2006 Posts: 5,608 Toledo, Ohio	.. My '77 Pontiac GP was rated sixteen City, 23 Hiway stock w/ 301" V8 2-bbl. engine, ii.41 rear, and TH350 tranny... and it seemed to go that... '86 Monte LS (total'd Autumn '2013), '87 GTA TransAm TPI350 TH700-R4, '85 Fiero 5-speed, '75 MG Midget Buick Alum.V8 BW five-speed manual, '77 Pontiac Astre Formula carriage 5-speed posi, '78 F150 4WD 351"M ==> 400" C6, '79 Caddy Seville Olds EFI 350" TH400, xix' Slickcraft 425HP 351W MerCruiser I/O

#983795 - 09/22/13 03:10 AM Re: Rear end gears question!! [Re: 1986SSclone]
Joined: Sep 2013 Posts: 281 Rebelson101 Member
Fellow member Joined: Sep 2013 Posts: 281 spring lake nc	also with to piddling gear information technology will lug the engine causing you lot to button harder on the gas causing more fuel consumption. i lost 0 mpg going from 2.73s to 3.73s in the firebird if it was drivin lightly with both gears if you trounce on it the 3.73s were slightly worse my gauge is because they allow the engine turn upwards farther than the 2.73s