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4.10 down to a 3.45 

 

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 Post subject: 4.10 down to a 3.45
Posted: Thu Dec 15, 2005 7:16 pm 
Getting Side Ways
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Ride: Blueprint EB II Fairmont 5L

Location: Wanneroo
WA, Australia

my car (EB 5L) is at the diff shop gettin a new crown wheel & pinion put in coz my 4.10 snapped a few teeth...its getin a 3.45 put in instead coz i had to wait to long to get a 3.7 or a 3.9.....will this effect my 1/4 mile times by much (although i will get much better fuel economy when driving normally)
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Posted: Thu Dec 15, 2005 7:20 pm 
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not by much, slower off the mark, but ull make it up top end :)

 

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Posted: Thu Dec 15, 2005 8:38 pm 
Getting Side Ways
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yeh you'l notice the initial pickup wont be so good anymore.

im running 4.11s in my manual el and love it.. gotta change em aswell coz they're worn, but am keepin the same ratio. (ive got a tall overdrive so its still cool for cruisin)

 

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Posted: Thu Dec 15, 2005 9:13 pm 
Getting Side Ways
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Your fuel economy should actually improve and espescially more so round town....doubt tho when it comes to the $$$ factor when u filll up that it would be any notable difference tho

 

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Posted: Thu Dec 15, 2005 9:43 pm 
Getting Side Ways
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Ride: Blueprint EB II Fairmont 5L

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WA, Australia

-clampy- wrote:
yeh you'l notice the initial pickup wont be so good anymore.

im running 4.11s in my manual el and love it.. gotta change em aswell coz they're worn, but am keepin the same ratio. (ive got a tall overdrive so its still cool for cruisin)

yeah the initial pickups not as good hey, but cruizin on the freeway i sit an 2000rpm instead of 2500rpm......
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Posted: Thu Dec 15, 2005 9:45 pm 
Getting Side Ways
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spose the upside is now my speedo gives the correct reading & i can actually use my trip computer now....
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Posted: Mon Dec 19, 2005 12:44 pm 
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what quarter times did you get with the 4.11??
i have a 3.23 at the moment and i have a 3.91 waiting to go in
my car is a pig off the line and struggles to chirp tyes on a flat road
hopefully with the 3.91 it will take off harder

 

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Posted: Mon Dec 19, 2005 1:10 pm 
Getting Side Ways
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Ride: Blueprint EB II Fairmont 5L

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my best time was 14.8 @ 92.6mph with the 4.11's...i wanted to go the 3.7's coz i reckon the 4.11's were overkill, restricting my midrange power as it didnt really pull in 2nd or 3rd......now theres good midrange power with the 3.45 so hopefully i wont gain too much time down the strip...ill probly swap them to 3.7's in a few months...
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