NOZR1

iTrader: (5)

Here is my expectations for the car. I want to run mid to low 11's all motor. I plan on having a cam, 3800 to 4000 stall on ET streets and have the suspension done (Spohn stuff and Hals). I plan on keeping this a street/strip car, but not a daily driver (something I can still take the kids in). I've used the search button, but still can't make up my mind. A local shop told me to get a Moser 12 bolt with 33 spline axles and Eaton posi unit and 3.90 gears. Will this hold up and be my best option? Or should I go with the 9". How about a spool? What are your opinions? Thanks in advance.

SilverGhost

iTrader: (53)

being a cam only automatic i think you'd be ok with the 12 bolt with posi.

the posi is the weak point in a 12 bolt, if you were a higher hp 6 speed car i'd say 9"..thus why I have a 9" with a spool in my car.

i'd go 12 bolt with your setup and enjoy losing less hp to the wheels compared to a 9".

if you are gonna get crazy with the car in the future you might want to consider the 9" now then.

kp

iTrader: (34)

With an auto I would stick with the 12 bolt if you want a posi, otherwise you are going to pay the price in HP with a 9"

With a 12 bolt/spool you should be able to run in the 9s with an auto so you have an upgrade path..

NOZR1

iTrader: (5)

Thanks for the replies. How streetable would a spool be? I plan on running ET Streets all of the time.

Turo

iTrader: (23)

that really depends on the drivers, some people consider it no big deal while others would MUCH rather have a posi. your best bet is to find someone with a spool and see if he'll take you for a ride in one. just a thought, good luck

kp

iTrader: (34)

I wouldnt drive a spool everyday, limited weekend car is fine IMO but everyone has their own threshhold for stuff like that..

I would just run the posi/33 spline axles and if you start getting over 500rwhp then worry about the spool. You can swap one in anytime and they are cheap..

z98

A 9" is easy to change out, you could keep your 4.10 gears and a spool handy and 3.42 with a posi for driving...

[EDIT: THE THIRD MEMEBER IS EASY TO CHANGE OUT, NOT THE ENTIRE REAREND ]

badpewter-z

iTrader: (4)

id go 9" all the way not that much more and alot stronger and versitility of changing gears quickwe just put one in my car this past weekend 4.11"s and a detroit locker extremely streetable as it is my daily driver other than a lil grinding on some brackets(ebrake ones) it was tit
and guess what IT'S QUIET!!!!! unlike most 12 bolts no gear wine or anything plus it will take a ton of abuse

squirrel masta

i love my 9 inch and i lost a whoping 5 hp from it i used my friends dyno down the street just to see how bad the hp drop was,needless to say im thrilled with it its quiet very easy to install stong as all hell and was pretty cheap 2500 delivered,just about optioned to the hills,call matt at ttp performance he is a wicked good guy and will take good care of you,plus it only took a week to get it

badpewter-z

iTrader: (4)

thats good to hear greg, only 5hp loss from a 10 bolt. you close to full power yet? or your old numbers from the last time? just curious as i havent hit the rollers yet

cz2898

how many hp can the 12 bolt hold up to?

squirrel masta

no im still on the same #S as before just 4-5 hp less from the 9 inch and the thing is roughly about 11 lbs heavyer than the 10 bolt too