SS101

iTrader: (2)

i want to road race more than drag race - aside from the occasion trip to the track - but my new setup will be making enough power that i'm worried about popping 12-bolt axles (700+rwhp...i've seen some grizzly pictures of guys who dumped the clutch on their 12-bolts at this power level). i know that fab9 is a great option but it wont work with a watts link and so the s60 is really my only option.

i have a couple of problems tho: the longest gear i can find for the s60 is 3.57 or something ridiculous. 1st and 2nd are almost useless with 3.42s let alone anything lower. also it's pretty heavy, which is not so good for unsprung mass and handling characteristics. its seems i'm limited to the trutrack as far as a posi.

what would you guys do if you were me?

Jeff400w

Did you check with Strange on the gear ratio choices?
The S60 is a little heavier but it's a rugged piece. The stock rear is not worth investing money in IMO.The 12 bolts weren't really designed for 700 HP.
There may be some options for you on other versions of the 9in other than the Fab 9. A lot of people make in 9in stuff.

quik01ss

iTrader: (24)

i just put in an S60 its 50 to 60 lbs heavier than the stock 10bolt and i dont even notice its back there carcraft did a comparison of the 12bolt, dana 60 and the 9inch the power loss was 5 to 10 hp least was 12bolt second was s60 and the 9inch sucked the most power all dynod the same day

SS101

iTrader: (2)

does the trutrack suck as much as everyone seems to think? thats the only posi that's offered and i refuse to have a spool (street car).

01FbTaWs6

iTrader: (12)

S60 is the only way to go IMHO, besides a midwest fab 9. You can also go with a detroit locker if you dont mind some noise back there. The things rock solid, and like said above, is actually more efficient then the 9.

SmokedOutZ28

iTrader: (35)

I've had no problems with the tru track in my S60. It's seen it's fair share of track passes and still works like new.

onefastmx5

iTrader: (6)

Not the best idea for a road race car

My truetrac has been holding up fine for 3k street miles... haven't launched the car at the drag strip yet.

Snake_Skinner

iTrader: (12)

whats the drivetrain loss on a MWC fab 9 and can it handle 550hp?

Low N Slow

iTrader: (4)

MWC makes a Watts link that works with his fabbed 9"

ssvert99

iTrader: (26)

we do offer a watts link setup for our fabricated 9 inch rearends.

our setup will handle any power you want it to, just depends on your budget and purpose of the car. biggest issue is the type of diff unit used.

a road course type car will benefit from the fabricated 9 inch rearend we offer over a S60 due to the unsprung weight difference. our rearend with an aluminum center section is only a few pounds heavier than the stock 10 bolt, with the nodular iron case is only about 15 pounds heavier.

we offer any type of diff unit available for the 9 inch... spool, clutch type posi, Truetrac, Detroit Locker, Wavetrac.

the difference in drivetrain parasitic loss is a wash between the two. the S60 is heavier in mass and rotating weight, the 9 inch is lighter in both areas, but is slightly less efficient.

Snake_Skinner

iTrader: (12)

so s60 is more efficient but heavier correct?

52172

iTrader: (2)

I would go MWC fabricated 9" with aluminum center section and the watts link and you will be golden!! I run one with 700 rwhp no watts link and love it... Couldn't be happier. I even use the trutrac without any issue. Its handling the power fine.. I don't do any drag racing though....

supermouse4

An S60 with breaks weighs about 20 lbs more than a 12 bolt with brakes.

There is less power loss with an S60 in comparison to a 9" Ford.

Here is the article from Car Craft comparing the 12 bolt, 9", and S60.
http://www.carcraft.com/techarticles...wap/index.html

Snake_Skinner

iTrader: (12)

But are you launching/dumping the clutch at 3000 or above ever?

Thx mouse for the info and article.

MY99TAWS6

iTrader: (3)

So they offer wavertrac now for the 9 and the 12 bolt.Hope dana 60 is next. I hear they are are very streetable and bulletproof.

I have dana 60 and you can see I have some big power happening. I have not been tracking it yet so not sure yet how the true track will hold up. I am also an auto.

I like my dana ,never noticed anything from weight fact if anything that it helped the back end stay put in rain and when roads got cold.

My dana is pretty darn quiet as well with maybe a bit of decel whine but no noticeable accel whine.

I would buy another one.

ssvert99

iTrader: (26)

our fabricated 9 inch rearend will take as much power as anyone can make, but you have to put the correct components in it, just like building an engine or trans. there are several options on the rearend housing, axles, and center section to fit anyone's needs and budget. even the base rearend package will hold about 700whp and launches of 5-6K.

Snake_Skinner

iTrader: (12)

DD, M6, will see 25% drag track time, want light as possible but bulletproof!!! i wanna be able to do 5+ dumps on a daily so what components would you suggest/reccomend ssvert99? oh ya car will end up H/C/I 75shot wanna be around 550hp after that which is capable right?

KurtRardin

iTrader: (11)

Either way you plan on going, fab 9 or S60, Eric at Midwest is the man to deal with. We talked it over and it seemed like the S60 was right for me and my budget. I got a good deal and I felt like they really took care of me. I love my S60.

The GM High Tech build 1SC-YA was an M6 car with the full Stranno handling package, with Koni 4/3 shocks, and an S60. Obviously that car was setup for road racing. Sam Stranno recommended the 3rd gen rear shocks because of the extra weight involved. I'm also rockin the 4/3 setup, and I like it.

sidewayz28

iTrader: (24)

^ this man speaks the truth.
MWC will take the time to talk about your goals, and offer suggestions and advice. Their customer service is top notch. i can't wait for my S60 to come in

meine96ws6

iTrader: (4)

MWC..that comment was awesome.. the base package can handle that type of power and abuse? that is awesome..