Which is the better rear for a street and strip car?

 

A Midwest chassis fab 9 inch. Several reasons why. Best bolt in rear on the market, Great customer service, You talk to the ppl that build it. you are not going to break it. There also tons of other reasons.

 

The ability to take the center chunk out is a really nice feature for the 9". Other than that, both do the job nicely.

 

I have owned both.

Need to know horse power and transmission, as well as tire you plan to use.

Auto, no power limit. M6 I would not go over 450rwhp with a sticky tire. I made 510 and broke the 12 bolt 4 times on a bias ply slick.

 

Wow. What broke inside? Did you have the girdle/cover?

 

The 12-bolt is a nice rear end but mated with a torque arm and it has similar flaws that the 10-bolt has. That is one reason to chose a 9 inch over a twelve bolt. One of the main reasons to chose our fabricated 9 inch over any other rear end on the market is because it bolts in as easy as the 10-bolt comes out. It is the most complete package on the market to date and comes with it's own torque arm and cross member that does not make contact with the floor like other stamped style nine inches do using a stock style after market torque arm.

If you have any questions just ask I will be more than happy to help you.

 

I am currently with a 4l60e tranny don't no my rwhp yet haven't had my new setup dyno yet

 

I too recommend the 9 inch over a 12 bolt.

The 12 bolt rears that are available for these cars is a step in the right direction. The 12 bolts are well known for being a stout rear that was a factory option back in the day in many performance cars. You can have a 12 bolt in an early Chevelle, Nova, Camaro, etc, and beat the snot out of it and not hurt anything. Put a 12 bolt into a late model f body that uses a torque arm, make a couple 4000 to 5000 rpm launches at the dragstrip, and I can just about guarantee you'll have a lot more gear noise on the way home. The torque arm seems to distort the housing on the 12 bolts, and it seems to happen to all the brands of 12 bolt rears. This does not happen to the 9 inch rears, and there is no price difference between the 12 bolt and nine inch rears. As the horsepower in our engines keep escalating, most people these days go straight to the nine inch rear. The 9-inch has an internal rear-pinion support that also supports the gear end of the pinion to limit gear deflection under high torque loads. This seems to be the major reason why the 9 inch doesn't start whining after high rpm clutch dumps, when the 12 bolt will pick up noise. The 9-inch locates its pinion gear lower on the ring gear to improve tooth contact, better the 12 bolt does. The 9-inch also has a 0.125-inch larger ring-gear diameter and internal pinion support than the 12 bolt.

Here is a link to the Moser rears I sell. http://shop.brutespeed.com/82-02-F-B...ar-Ends_c5.htm No extra cost for shipping, the price you see is the end price unless you're here in Indiana, then we have to charge you sale tax. These rears ship out just two days after the order is received! Bob

 

so looks like a 9 inch is the way to go

 

Spiders at an autocross, and the 4.11 gears 3 times at the strip.

The 9" I just installed is a MWC unit.

 

Midwest chas

 

Midwest chassis how much is your 9inch rear end in a posi you can pm me.

 

PM Sent. If anyone has any more questions just let me know. I just cleaned out my PM box for the week. Sorry about it being full that darn thing has to be cleaned out every other week.

 

If you know how much heavier is a moser 9 inch than the stock 10 bolt

 

What about the S60 in comparison to the 12bolt and 9 inch?

 

Weight is going to depend on what diff and case you chose. Your looking at a stamped style 9" with any after market style housing weighing in at 40 pounds plus on up depending how you outfit it.

Rampant did a great weight comparison in this thread that shows the difference between a 12-bolt and our fabricated nine inch.

 

The S60 is a great bang for the buck, we have sold tons of them over the years and all the customers have been very happy. It is a tank of a rear end though and you are still using a bulky heavy stock style mounting bracket for the torque arm.

 

I was told by a local friend that just bought a s60 that it takes less power to turn the s60 than a 9" because of the way the pinion sits in relation to the gear. Any truth to that? I'm sold on getting either a 9" or Fab 9" on the car in the next few months, just wondered if I should be considering a s60. He got it delivered with a DS, 35 spline, and trutrac for $2900 I think he said. So that's right up there with the others.

 

I would consider an S-60 and a stamped 9" a wash when it comes to worrying about weight or drive train loss.

You do the math on what he paid for an S-60 we could of got him into a fabricated housing with a D/S, comparable diff unit, axles, AND a on car adjustable C/M torque arm and cross member of his choice shipped to his door for $3185.

Then he could of had this sitting under his car.