DELCOS NEW RIDE

[Holden202T]

good to hear!

[delcowizzid]

yeah now to crank the boost back in and gtech it for 0-100 time

[delcowizzid]

so close to sub 5 seconds

nearly.jpg (124.16 KiB) Viewed 4698 times

[Holden202T]

nothing wrong with that from a v6 commodore

[delcowizzid]

what a weekend fitted diff in vb with 3.89's went out tuning did 40km and thought we would check the diff gears cause they got noisey pulled out one axle twisted to shit its the 2nd one thats twisted this one just lasted only 40km the last one lasted a burnout comp and drags .so theres no chance for them when the hoosiers go on so we now have the axles out of the old faithfull stationwagon parts car LOL and going to go 28 spline instead of the 25 spline vl axles just need the axle splines extended and the ends trimmed and have my spool in a 4 spider centre ready to go in .seems the 28 spline is stronger cause the stationwagon axles have had a lot of k's of hitting 2nd hard on boost with the shiftkitted auto and they are like new and nearly twice as thick

[Holden202T]

There is a way you can work out the load rating of the axles, i found this when i was researching the axles for the gemini. Keep in mind these are billet axles so they are probably higher load ratings than a stock axle ... especially after years of use in a car!

for the record, stock gemini axles are 23 spline

i was amazed at the jump in load rating from 28 to 31 spline, especially when the axle itself is only a small increase in diameter.

from this website: http://www.altra9.com.au/altra_9_flanged_axles.html

A9 FLANGED AXLE TORQUE RATINGS

23 Spline – 2875 ft-lb (per axle)
25 Spline – 3750 ft-lb (per axle)
28 Spline – 4800 ft-lb (per axle)
31 Spline – 7000 ft-lb (per axle)
35 Spline – 9600 ft-lb (per axle)

FORMULA FOR AXLE TORQUE

(Max torque of your car (ft-lb) x (gearbox first gear ratio) x (diff ratio) x 90% efficiency.

Each axle should be able to handle all of the maximum torque your car can produce. This will create a 200% safety factor.

Example: A car has 600 ft-lb of torque, Turbo 350 transmission (2.52 ratio 1st gear) and a 9" diff (4.11 ratio gears)

Calcuated as: (600) x (2.52) x (4.11) x 90% = 5592 ft-lb

Therefore it is recommended that you use a 31 Spline axle which has a Torque capacity of 7000 ft-lb

so in my case, the last dyno i had done on the 202 was 260 ft lbs of torque was the peak, first gear in the gemini of 1.82 and 3.45 diff ... now the one thing i was guessing was increase in performance from more compression and methanol .... i have heard people say you get 30-40% increase in HP from it ... so i went on the safe side and added 50% more torque.

390 ft lb x 1.82 x 3.45 x 90% = 2204 ft lbs

so as you can see 28 spline axles should be able to handle the power my car will potentially make .... keeping in mind the input shaft spline on a borg warner diff is 28 spline too, so in theory it should fail before 28 spline axles do! but i went 31 spline cause you can get full spools for BW in 31 spline and theres bugger all price difference!

[VNracer34G]

So does this mean the wagons getting parted out mate??? might be keen on a coupla bits for my VR wagon

[delcowizzid]

yeah let us know what you want trying to keep it air tightish for a while but lights and shit are here and most parts just ide rather not remove doors or windows untill its more parted out

[delcowizzid]

wellllll sent vn diff to the pros to set it up with 3.89:1 gears got it back swapped it in killed it in the first 5-10km of driving LOL

[Holden202T]

what broke ?