rear end question.
 

hear is my newbish domesic question of the day... ill put my flame suit on..:)

i have been on ls1performance and ls1tech and myls1 lookat upgrqades for a fbody ws6(yes i am still wanting one)

i read that when swapping from the stock 10bolt to a ford 9inch or dana60 you loose power. is this really true.?

what would be a better option as far as power to the ground/reliability.?

ive herd that the ford9inch is like a power taker... reliable as all get out and will take all you can throw at it. or is this in referance to upgraded with axels center section ect ect.. oh i was looking at 4:10 gears as well.

again this is just looking.. call it bench racing or building on paper. im just trying to do my home work so if/when i get one i can have a plan of attack as to what i want..

a 9 inch will rob some power away compared to a stock 10 bolt or 12 bolt.

Just like you loose power through an auto compared to a manual.

Also on a dyno, you can lose power with a higher stall converter than a stocker. That is what I have seen , not experienced. But at the track you pick up.

some go with a 12 bolt just bc they can be stron enought to a certain level and they weigh less. it would prolly be cheaper to go 12 also

thx man.. i was not really sure i just read it.. i am well aware of drive train loss and diffrent dyno readings. i was just not sure how valid the statment was.. i cant see it loosing to much whp thru a ford 9 inch as compared to the stocker. nothing you will fee.

for referance ur but dyno osnt really feel anything till u have made 10% more power.

8.8 is great.

the 12 bolt has problems in fbodys due to cracking the torque arm mount on the housing with higher powered cars, the 9" mount is a lot stronger, the 12 bolt is great and holds a lot of power, but it just wont hold up in higher hp late model fbodys like it did in the older cars.

same problems as 12 bolt when in fbodys

The Ford 9" takes a little more horsepower to turn due to its lower pinion centerline than other rearends. With the pinion centerline being lower, this design decision makes for a longer tooth contact pattern between the pinion teeth and the ring gear teeth. Durability comes from less lbs/sq. in. load on the teeth. The negligible horsepower loss is due to the extra operating friction of this increased tooth contact area.

Simply give and take. Damned if you do, damned if you don't. Decisions, decisions!

thx everyone.. i dont think the friction loss of power will amount to anything the 4.10 gears will equal out in gearing.

im sure ill be asking more domestic stuff as i get a handle on the ls/fbody... wow my newbish feelings are so epik..

Midwest fab 9!!