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Author Topic:   Gear Choices & The New Motor
JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 05-17-2001 05:34 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
Finally my new stroker from CHP has arrived at my local shop. They won't have time to install it until after Memorial Day but it's nice to have it here. For those who didn't see my post a while back about the motor it's a 342 CI stroker with TFS Street Heat Heads. All the regular goodies. I can't wait to get it running.

I don't know much about gear choices for the 8" rears so I was hoping you guys could give me some suggestions. I currently have a 3.0 rear gear because I wanted to run some high speed events but I need something even higher for those. So my first question is what is the numerically lowest gear commonly available for this rear, 2.79?

What gear would you guys recommend for the street? I have run 3.50s with my last combo(289)but I had all kinds of problems getting traction. First gear was useless even from a roll. I also had to shift easily into 2nd because of the wheelspin. If not careful a hard shift into second would put me sideways. It was fun but not great for acceleration.

I plan to run street tires only. I might run ET streets on occasion because I have them already on another set of wheels. Keep in mind my Richmond 5 spd has a 3.27 first gear. Oh yeah I have only 225/60s in the back but I might be able to squeeze 245s in after they wear out. So what do you guys think about a gear choice? 3.25s?

I will get the car running and test it to see what I find before making any changes.


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65 Stang - TFS SH Stage III Heads, Nash 5 speed, Fuel Injection, etc...
2001 - Z06

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Greenstang
Gearhead

Posts: 908
From: its all a fog..
Registered: May 2001

posted 05-17-2001 06:06 PM     Click Here to See the Profile for Greenstang   Click Here to Email Greenstang     Edit/Delete Message   Reply w/Quote
You can get 3.20's though I haven't seen nay for sale lately...
other than that, your choices are
2.79/.280 (used only) from Currie ($75)
3.0 that you already have,
3.50/.55 agreed, first is useless...
3.80 ($$)
or
4.11

what is fifth in the Richmond? 1:1?

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Marcus
My World

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steve'66
Gearhead

Posts: 8754
From: Sonoma,CA,USA
Registered: Mar 2000

posted 05-17-2001 06:13 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Jas,

Everyone here knows anything under 3.50s are "girlie man" gears! Just ask Sam You can have 2.79, 3.00, 3.20, 3.55, 3.80, 4.11, or 4.62 in the 8". (maybe more, but these are all I know of)

We run 4.11s in the 9". Traction is a real problem on street tires. You can just roll into the throttle at 45 mph and light 'em up. Good FUN

SteveW

[This message has been edited by steve'66 (edited 05-17-2001).]

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 05-18-2001 01:13 AM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote

5th is 1:1 you are correct. With 3.0s that limited top speed with my 289 to 168. I'll run the 2.79s next time.

"Everyone here knows anything under 3.50s are "girlie man" gears!"

Well before I was married I was quite the "girlie man" on occasion... LOL Somehow I don't think that's what you meant.

It looks like 3.50s are going to be it and I'll need to learn to gently squeeze the throttle. That is one of the hardest things for me. I love just mashing it down.

What's the best place to buy gears? Currie?

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richard bohm
Gearhead

Posts: 373
From: tucson,az-luray,va
Registered: May 2001

posted 05-18-2001 03:11 AM     Click Here to See the Profile for richard bohm   Click Here to Email richard bohm     Edit/Delete Message   Reply w/Quote
desk top drag strip tells me that with street tires 2.79 gears are the quickest. if you run slicks then you can run stiffer gears. for those people who think 2.79's are girlie man gears, then take a trip down the silver state in nevada and see where your 4.11's get you!!

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Tom351
Journeyman

Posts: 93
From: Marietta,GA
Registered: Mar 2001

posted 05-18-2001 09:37 AM     Click Here to See the Profile for Tom351   Click Here to Email Tom351     Edit/Delete Message   Reply w/Quote
Yep, 2.79 may be girlyman at the drag strip, but not with some power and a open road.

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67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/[email protected], Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 05-18-2001 12:11 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
I'll see how well it pulls with the 3.0s first and then see if I need a lower gear. I'm thinking that with the extra torque it may work out.

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65 Stang - TFS SH Stage III Heads, Nash 5 speed, Fuel Injection, etc...
2001 - Z06

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66351stang
Gearhead

Posts: 711
From: sayville,newyork
Registered: Jul 2000

posted 05-18-2001 06:07 PM     Click Here to See the Profile for 66351stang   Click Here to Email 66351stang     Edit/Delete Message   Reply w/Quote
in my 66 i have a 351svo punched 30 over=357
worked c-4, i run 4.11 in my 8" and is a good combo..street and strip..

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ponycar66,have you flown in a ford latley???????
66-COUPE W/351SVO
glad i had a v-8 !!!!!!
84.5 gt350-61 falcon 302
have a great day!!!!!!!!

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 05-19-2001 02:27 AM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
With the 5 speed my gear multiplication with a 3.0 is almost the same as a 4.11 with your C-4. Actually it works out to the equivalent of a 3.99 with a standard c4.


quote:
Originally posted by 66351stang:
in my 66 i have a 351svo punched 30 over=357
worked c-4, i run 4.11 in my 8" and is a good combo..street and strip..


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65 Stang - TFS SH Stage III Heads, Nash 5 speed, Fuel Injection, etc...
2001 - Z06

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FloJoe
Gearhead

Posts: 574
From: Port Orange, FL, USA
Registered: Dec 2000

posted 05-20-2001 10:15 AM     Click Here to See the Profile for FloJoe   Click Here to Email FloJoe     Edit/Delete Message   Reply w/Quote
Does anyone know where I could get some 3.20's???

------------------
Joe Fields
68 Fastback 289ci bored .030 over
C-4
"Never play leapfrog with a unicorn."

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Ryan Wilke
Gearhead

Posts: 2047
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 05-21-2001 09:13 PM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by richard bohm:
desk top drag strip tells me that with street tires 2.79 gears are the quickest. if you run slicks then you can run stiffer gears...

Richard: How does that toy of yours figure that? What values do you need to determine which rear gear is best? Is it pretty 'real-world' accurate? Sounds pretty Kool... Ryan

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289 Rod
Journeyman

Posts: 63
From: Laguna Niguel, CA, USA
Registered: Oct 2001

posted 03-25-2002 01:02 PM     Click Here to See the Profile for 289 Rod   Click Here to Email 289 Rod     Edit/Delete Message   Reply w/Quote
Shouldn't a 2.79 girly gear compared to a 4.11 even on freeway if you link it to a properly geared 5 or 6 speed tranny. Then you have no chance. That is what I am thinking of doing with my mustang.

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'65 Mustang Black/Black Pony Interior
289 4V 4 speed Manual
Weiand Dual Plane,AFR 165cc, Comp Cam Pro Magnum Rocker Arms, 3.55 Rearend, 2.5 inch exhaust with headers and loud!

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 03-25-2002 04:20 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
Well since this thread has made it's way up to the top I'll add some comments since I've got the motor running nice now. On the street it seems that 3.0 is going to be the maximum gear unless I want to run ETs. Traction in first is minimal and the 1-2 shift has to be a bit soft. It runs great though. I think the local track is opening up again soon so I'll b able to get some times.

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mellowyellow
Gearhead

Posts: 6609
From: So. Fl.
Registered: Aug 2000

posted 03-25-2002 04:52 PM     Click Here to See the Profile for mellowyellow     Edit/Delete Message   Reply w/Quote
The 3:20 ratio is a 6 cyl rear. Looking at the 68 facts book, they show 3:25 but that is a 9" which is what's in my 68 - came out of a 68 Shelby 350 . My 65 has a 3;00 limited slip and that allows a mildly warmed HO to burn, big time. I can only imagine what your new motor will do with street tires. LOL! Good to see you back.

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mvierow
Gearhead

Posts: 209
From: Bay Area, Ca
Registered: Apr 2001

posted 03-25-2002 05:57 PM     Click Here to See the Profile for mvierow   Click Here to Email mvierow     Edit/Delete Message   Reply w/Quote
quote:

worked c-4, i run 4.11 in my 8" and is a good combo..street and strip

I didn't think you could put those 3 words in the same sentance. C-4, 4.11's, and street, that is. I have 3.70's and a c-4 and its on the verge of being to much gear for the street. Freeway rpm is over 3500..

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 03-25-2002 09:07 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
I remember doing that with my 289 when it was lightly modded. I guess it's because the power band was so much lower. As I went with engines that were more modified the torque down low wasn't as much so it was easier to get traction. The stroker makes up for some of that because of the displacement.

I was around just busy, but it's nice to be back.

quote:
Originally posted by mellowyellow:
The 3:20 ratio is a 6 cyl rear. Looking at the 68 facts book, they show 3:25 but that is a 9" which is what's in my 68 - came out of a 68 Shelby 350 . My 65 has a 3;00 limited slip and that allows a mildly warmed HO to burn, big time. I can only imagine what your new motor will do with street tires. LOL! Good to see you back.

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JAAZZY
Gearhead

Posts: 772
From: Bay Area, CA
Registered: Apr 2001

posted 03-25-2002 09:10 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
For my taste if this was more of a daily driver even a 3.0 rear gera would be more than I would truely want. I cruise at about 75mph and that puts me at 3000rpm. I would actually be happy with around 2200 for cruising. A six speed would solve all my problems, well except for the little tiny financial one.

quote:
Originally posted by mvierow:
I didn't think you could put those 3 words in the same sentance. C-4, 4.11's, and street, that is. I have 3.70's and a c-4 and its on the verge of being to much gear for the street. Freeway rpm is over 3500..

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VonYount
Journeyman

Posts: 96
From: San Francisco, CA, USA
Registered: Jul 2000

posted 04-06-2002 01:43 PM     Click Here to See the Profile for VonYount   Click Here to Email VonYount     Edit/Delete Message   Reply w/Quote
2.49 gears BABY!!!!

WOO-Hoo!!

Actually, while I complain about the gears a lot, I shouldn't, because they really keep my rpms down on the freeway, and keep me from breaking the rear-end loose everytime I turn a corner here in SF.

I spin the tires enough with the 2.49s anyway, I'd hate to think of how little traction I'd have with lower gears and wet roads...

Ryan

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'66 Mustang Coupe
--351W
--black spot primer
--steel wheels

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68stang351
Gearhead

Posts: 273
From: Savoy TX, USA
Registered: Mar 2002

posted 04-06-2002 04:14 PM     Click Here to See the Profile for 68stang351   Click Here to Email 68stang351     Edit/Delete Message   Reply w/Quote
I have 3.20's in mine now but when I get new gears (or a rearend) they will be for sale if anyone still wants them.

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Hoofbeats are louder than Heartbeats!

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