9- inch

[Micknol]

Will a new 9-inch ford 35 spline and a spool be slower in the 1/4 then a stock 10 bolt same gear

 

[lilbowtie]

That's a loaded question. If you have 700 hp, the stock 10 bolt(7.5) will be slower cause it will never make it. With 3-350 hp the 10 bolt will have a slight advantage (lighter-less hp to turn)

 

[smokes468]

Will a new 9-inch ford 35 spline and a spool be slower in the 1/4 then a stock 10 bolt same gear

All you really need is 31 spline axles, they will handle ALOT. I have a full spool 31 spline 9" under my 78 cutty, As far as i'm concerned, any little bit of the extra weight i'm pulling down the 1/4 mile is well worth the piece of mind. Best loss of any little ET & MPH you'll ever spend. Your only other option would be an 8.5" out of a GN/Hurst/442 Car.

 

[GhettoRacingKid]

Anyone every see how much of an et loss it really is?

 

[Micknol]

I have a 82 cutlass with a 406 SBC runs mid 11s had a 10 bolt with moser axles and c clip elemenators I sheered the cross pin and broke the gear housing so I ordered a 9 inch I thought it might slow me down

 

[smokes468]

Anyone every see how much of an et loss it really is?

I'll bet its no more then a tenth & 1 MPH, maybe less, there what 100 lbs. more then a 7.5" if that. Not a bad loss knowing you have the option of standing it on the bumper if you so choose 8)

https://www.youtube.com/watch?v=CosZdrWB_ww

 

[83partshauler]

It'll take more power to turn the 9" than your 10bolt for sure. The pinion is located lower and further back on the ring gear on a 9" so there's more surface area connecting the two. One of the benefits that make them stronger. However because of which it'll take more power to turn it. I have a customer's 98' Trans Am in my shop that we did allot of suspension upgrades to last year and one of them was installing a Moser Fab9 9" rear. Cost him a little over 20hp at the rear wheels just from swapping over. Mind you he didn't lose that power at the motor - it was absorbed thru the drivetrain. Bigger, heavier, stronger rear end.

 

[jociha]

If your doing a custom swap go with a GM 12 bolt, it is as strong as you want to make it and it takes a little less power to turn it than a 9 inch.

 

[Bigdaddy198]

I have a 12 bolt in my 80 cutlass, has the upper and lower control arms, bags in both coils, anti roll set up and competition engineering 3way drag shocks its a great set up alot easier to turn than a 9" and I am putting 720HP to it got my full body Cutlass running 10.70's off my trailer no spray all throttle