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» Northern California Ford Owners     » Automotive   » Tech Talk   » gear ratio in my cobra

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Author Topic: gear ratio in my cobra
the50ho
THE50HO
Member # 73

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well, I'm basically at the point where I believe 4.10's are the right choice.

I'll be putting these in my 98 cobra. It's basically exauhst and a couple small bolt ons....nitrous, and going to be blown within 6 months. Unfortunatley..I can not really afford to go crazy N/A (even though that's what I'd rather do)...

Keep the nitrous and blower in mind when dropping suggestions.

I've heard anything from 3.73 (no thanks) to 4.56's... [Eek!]

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Too many motorcycles...and now a destroyed arm from Motocross...brrraaappp

Posts: 4056 | From: Roseville, Ca (Sacramento) | Registered: Nov 2000  |  :
the50ho
THE50HO
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also, what gear correction will I be using for each ratio? thanks!

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Too many motorcycles...and now a destroyed arm from Motocross...brrraaappp

Posts: 4056 | From: Roseville, Ca (Sacramento) | Registered: Nov 2000  |  :
racercosmo
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I would go with 4.10s if this is a daily driver mainly. The Abbott speedo corrector is what I use.

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Beauty is in the eye of the beer holder

Posts: 973 | From: Marin | Registered: Sep 2002  |  :
Stimson
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My opinion goes like this....


NA: 4.56's
Nitrous: 4.30's
Blower: 4.10's

Posts: 2373 | Registered: Jun 2000  |  :
4RS FED
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quote:
Originally posted by st5150:
My opinion goes like this....


NA: 4.56's
Nitrous: 4.30's
Blower: 4.10's

what about twin turbos??? [Confused]

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i have a twin turbo mustang and you don't!

Posts: 3686 | From: 650 | Registered: Nov 2002  |  :
the50ho
THE50HO
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quote:
Originally posted by ON N2O:
quote:
Originally posted by st5150:
My opinion goes like this....


NA: 4.56's
Nitrous: 4.30's
Blower: 4.10's

what about twin turbos??? [Confused]
You and I think ALOT alike [patriot] If I could find a kit with a carb # on, it would be on the car in no time [Frown] .

So, yeah, if you see one, PLEASE PLEASE PLEASE let me know! wooooooooooooooooshhhhhh

Posts: 4056 | From: Roseville, Ca (Sacramento) | Registered: Nov 2000  |  :
stangin'
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if you will STAY N/A go with 4.56s. i currently have them on my cobra. it's not as bad as you think with these 4V motors. i still get 20-21mpg. i had 4.10s, but after a year or so it felt like it wasn't enough gear. if you want to compromise, 4.30s should be good.

with 4.10s my best was a 13.4 @104.5xx with a 1.999 60ft. i haven't had the chance to test out the 4.56s yet.

Posts: 2993 | From: Bay Area | Registered: Oct 2001  |  :
the50ho
THE50HO
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quote:
Originally posted by stangin':
if you will STAY N/A go with 4.56s. i currently have them on my cobra. it's not as bad as you think with these 4V motors. i still get 20-21mpg. i had 4.10s, but after a year or so it felt like it wasn't enough gear. if you want to compromise, 4.30s should be good.

with 4.10s my best was a 13.4 @104.5xx with a 1.999 60ft. i haven't had the chance to test out the 4.56s yet.

very interesting....the car is unfortunately not going to stay n/a for too long. What was on the car with the 13.4@104 pass??

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Too many motorcycles...and now a destroyed arm from Motocross...brrraaappp

Posts: 4056 | From: Roseville, Ca (Sacramento) | Registered: Nov 2000  |  :
BOUNTY HUNTER VERT
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410s if its going to have a poweradder

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89 Saleen vert Bounty Hunter racing

http://www.corral.net/photopost/showphoto.php?photo=1324&papass=&sort=1&size=medium&thecat=

Its all stock and slow wanna run.

Posts: 899 | From: ca | Registered: Apr 2003  |  :
stangin'
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QUOTE]very interesting....the car is unfortunately not going to stay n/a for too long. What was on the car with the 13.4@104 pass?? [/QB][/QUOTE]

mods were:

4.10s
borla xr-1 catback
dr. gas o/r x-pipe
steeda pulleys
UPR powerpipe

dynoed about a yr or so ago and it made 287rwhp and 276twtrq.

Posts: 2993 | From: Bay Area | Registered: Oct 2001  |  :
4RS FED
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quote:
Originally posted by the50ho:
quote:
Originally posted by ON N2O:
quote:
Originally posted by st5150:
My opinion goes like this....


NA: 4.56's
Nitrous: 4.30's
Blower: 4.10's

what about twin turbos??? [Confused]
You and I think ALOT alike [patriot] If I could find a kit with a carb # on, it would be on the car in no time [Frown] .

So, yeah, if you see one, PLEASE PLEASE PLEASE let me know! wooooooooooooooooshhhhhh

well i got my TDC kit, and it doesnt have a carb # but oh well....

Carb kits were made by incon. Pwr4all3 has one for sale. brand new he was saying and all coated.... check it out and do it.

then we can be twin turbo brothers [Whoo Whooooo!]

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i have a twin turbo mustang and you don't!

Posts: 3686 | From: 650 | Registered: Nov 2002  |  :
4RS FED
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oh wait you got a 98.... twin turbo kit for your cobra [Wink] thank me later [Razz]

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i have a twin turbo mustang and you don't!

Posts: 3686 | From: 650 | Registered: Nov 2002  |  :
J's DDLY SNK
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I say go with the 4.10's if a blower is around the corner.

I went with 4.30's because I plan on keeping it N/A for a while.

Good Luck

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Rest In Peace
Juan Moya "The King Cobra"
11/16/81 - 8/20/05
We Will Never Forget You

Posts: 649 | From: San Jose | Registered: Oct 2002  |  :
Rev Happy
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What are your plans for the car? Meaning do you plan on racing it at the track a lot, or just mainly pimping it on the street? On the street you will have absolutely no traction with 4.10s + and a blower unless you're on E.T. streets... Just something to think about if you're not going to take it to the track a lot...

I run 4.30s in my N/A Cobra and have basically all the bolt-ons except headers... On the street, its fine as I usually just cruise in 5th... On the highway, the gears keep me from speeding as I like having the tach around/under 3000rpm...(80mph) Plus my car is pretty low in the front so not speeding keeps the car from getting jumpy on the bumps in the road... If I was putting a blower on my car now, I would definetly step down from 4.30s since I wouldn't be going to the track all the time... I would probably put in 3.73s or 3.90s...

later,

-Mike

[ October 13, 2003, 07:58 PM: Message edited by: Rev Happy ]

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96 Cobra

Posts: 182 | From: Southern California | Registered: Dec 2001  |  :
97 slobra
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so what gear ratio would u recomend to get the best performane 3:73, 4:10, or 4:30 runnin with a 100 shot
Posts: 4 | From: menlo park | Registered: Oct 2003  |  :
Stimson
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quote:
Originally posted by 97 slobra:
so what gear ratio would u recomend to get the best performane 3:73, 4:10, or 4:30 runnin with a 100 shot

4.30's for sure.
Posts: 2373 | Registered: Jun 2000  |  :
97 slobra
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will 4;10 be good enough cause from what ive heard 4;30s will be to much for some what daily driving
Posts: 4 | From: menlo park | Registered: Oct 2003  |  :
Stimson
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Ask those that say "4.30's are too much" if they've actually driven a 4.30 geared DOHC 4.6 before.

So far two people on this thread have driven a 4.30 geared DOHC car and said its fine.

Posts: 2373 | Registered: Jun 2000  |  :


 
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