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Discussion in 'VN - VP Holden Commodore (1988 - 1993)' started by Pav, Feb 13, 2008.
Any difference in strength between v6 and v8 diffs?
yep, V8's are have shotpeened gears in them.
What if I got a diff shop to shotpeen the V6 gears and would it cost much?
Yep they are shotpeened but it could be debatable if they make any difference. You don't see anyone breaking the gears in any sane car anyway. I'm running NA VL gears in mine and they don't break
i doubt that is and option, shotpeening (someone correct me if i'm wrong) is when the gears are pounded with heaps of ball bearings at high speed tocompress the metal and make it stronger and i presume it is done before the gears are machined, so i don't think you can get 6 cyl ones done, but chuck it in anyway it might last.
Ok, cheers, I just thought there was a large difference between them but thats cool.
Nearly every fast V8 is running gears from some low power car with big ratios and they aren't shotpeened. Plenty of them running 12 second 1/4s or better on those gears so I don't think you will break it
really wouldnt call 12 seconds fast anymore anyone with a gen 3 and few bolt ons can do that now lol
My mate in his stock auto v6 with simply a spooled diff managed to blow the gear teeth through the housing..... how ever he did snap two axles (wich obviusly were replaced) before hand. saying that the lash couldnt have been to crash hot after the first couple of axles
Dont take it that makes them weak thow cause this diff took a beating and im very suprised that he didnt blow other things first.
12 seconds is certainly fast for a 5 litre or a V6 which run these diffs, the gen 3's run the 8 inch gears. 95% of VLT's don't make low 12's either no matter how fast people think they are. I've see a 11 second torana with a VN diff break several axels and never hurt the 4.11 gears in it
HDT_aero, A friend of mine broke the gear in his VQ but he ran out of oil so it doesnt count , I'm sure you could break on with a big single spinner burnout until the spider gears weld their shafts and then snap off and THEN break the main gears, that happens. But that not really the fault of the main gears.
that brings me to another point, Are the spider gears and side gears shotpeened too in V8's
And they do it down Auburn St at 5pm hey Davo!
haha mate. dont waste your time. just get an LS1.
I've read on the other forum that they are yes.
quick quesiton, i have a "high performance" diff so the tag says, and with the age old jack it up and spin the wheels lsd test it passes with flying colors, but is it really an LSD cause they released diff with "high performance LSD" on the tag, it does LS but i want to know so when i get the gears installed i'll ask em to shim up the lsd and make it tight again
shot peening is fasinating to watch.
simply the metal is heated to around 900* and only one ball bearing is fired at it,
it is easy to tell if it fail to temper or not,bye sight and sound.
a ping is heard like a crystal glass and a shockwave is visable to the naked eye,(sortof like seeing a bomb shockwave)
running from the center to the outer in a radius motion.
Are you sure about that? I thought thousands of balls were shot at the metal to forge the surface layer?
High performance tags are normally on live axle and the LSD diffs actually say LSD (i.e. the high performance LSD that you mentioned).
But if it passed the test spinning the wheels i'd say its LSD.
for the diff's that's posable but for tempered saw blades 500mm dia
only one does the job.
that's what i thought.
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