gripper differentials - Page 2 - Saxperience

Dave_P · 18th March 2011, 16:41

John, the Quaife atb diff does not "lock" at all, it states that fact on Quaife's website. However I do agree a Quaife is more suitable to a road car that's also used on track.

Barry123 · 18th March 2011, 16:59

Doesn't the straight cut teeth of the final drive mean it's slightly more efficient (lower transmission loss) though, albeit at the cost of longevity?

Interesting thread guys by the way.

KamRacing · 18th March 2011, 17:53

I would say the benefit is more strength rather than efficiency though it might help marginally. You will get more noise though.

AlexB^p · 19th March 2011, 08:47

That lovely straight cut whine lol

KamRacing · 19th March 2011, 09:58

will be interesting to see how loud it will be. I cannot wait for my whole gearbox to whine merrily away. In fact that reminds me that I need to make some calls!

AlexB^p · 22nd March 2011, 07:15

Ive got a semi good idea from going in colins rally sax a few months back
It wont be silly but will be noticeable

The box and diff were dropped off for fitting at the weekend should be on the car early april

Colin · 22nd March 2011, 16:27

Quote:

Originally Posted by AlexB

Ive got a semi good idea from going in colins rally sax a few months back
It wont be silly but will be noticeable

The box and diff were dropped off for fitting at the weekend should be on the car early april

Its normally alot louder than that, but we only drove it for a few miles so it wasnt warm, mine only whines coming down the revs.

My diffs loosened fuck loads as I use it on the road too much, need it tightening now.

axsaxoman · 22nd March 2011, 17:09

Quote:

Originally Posted by Dave_P

John, the Quaife atb diff does not "lock" at all, it states that fact on Quaife's website. However I do agree a Quaife is more suitable to a road car that's also used on track.

locking was probably a poor choice of words if we are being exact ,
but even on a plate dif you don,t want it to lock --just slip at a predetermined load ,which is what the quiafe does ,certainly you can wind a plate dif up so to all intents and purposes it is locked --,but thats not really what you want either as then it becomes zig -zaggy and hard to hold on to .
i,ve used both straight cut gears + helical gears and the power loss is very much the same ,put it this way
the power loss between a g/box being cold and hot is much more than the difference between straight +helical gears,the main difference is no side thrust on the gear box bearings or synchro hubs .
the original mr citroen had an answer --it is the chevron shaped gear tooth,just like the citreon badge --twice the tooth contact area and no side load --thats how he started off --making gears for water wheels to transfer power from wheel to line shafts to run weaving +spinning machines .but they didn,t run at very fast speeds ,but lots of torque

AlexB^p · 22nd March 2011, 17:16

Quote:

Originally Posted by Colin

Its normally alot louder than that, but we only drove it for a few miles so it wasnt warm, mine only whines coming down the revs.

My diffs loosened fuck loads as I use it on the road too much, need it tightening now.

Yours seems to be quite highly sprung though colin from what youve said about shafts ect its pretty rough on them

AndySAXO^p · 22nd March 2011, 18:43

god, they are expensive ent they, to be fair, as i am not trying to race for really so i have gone for the cheaper and easier option with the quaife ATB, as i just think they are too much, for a track car/ fast road.

but does look very nice, shame it will be hiden away.

in totally i payed 450 quid for my ATB diff and that is inculding fitting to the S1 crown wheel.

i think that money well spent in my eyes, but good luck

Tufty · 22nd March 2011, 19:04

Quote:

Originally Posted by AndySAXO

god, they are expensive ent they, to be fair, as i am not trying to race for really so i have gone for the cheaper and easier option with the quaife ATB, as i just think they are too much, for a track car/ fast road.

but does look very nice, shame it will be hiden away.

in totally i payed 450 quid for my ATB diff and that is inculding fitting to the S1 crown wheel.

i think that money well spent in my eyes, but good luck

S1 crown wheel, sexual!

AndySAXO^p · 22nd March 2011, 19:06

indeed matey, going to be fun going to the ring with the diff and s1 box

Ryan^p · 22nd March 2011, 19:14

Quote:

Originally Posted by AndySAXO

indeed matey, going to be fun going to the ring with the diff and s1 box

topping out at about 120/5 unless you have a crazy high rev limit

mark1311 · 22nd March 2011, 20:08

the s1 box is surly 2 short for the ring? i was planning on using my s1 box at cadwell etc, but if i take it to the ring i will fit a vts box or 1400 xsi box (if i can get one)

KamRacing · 22nd March 2011, 20:43

Quote:

Originally Posted by AndySAXO

god, they are expensive ent they, to be fair, as i am not trying to race for really so i have gone for the cheaper and easier option with the quaife ATB, as i just think they are too much, for a track car/ fast road.

but does look very nice, shame it will be hiden away.

in totally i payed 450 quid for my ATB diff and that is inculding fitting to the S1 crown wheel.

i think that money well spent in my eyes, but good luck

half of the cost is the final drive. They tend to be very expensive!

Colin · 22nd March 2011, 20:44

Quote:

Originally Posted by Ryan

topping out at about 120/5 unless you have a crazy high rev limit

Mine does 116mph on 14s with a 7700 limiter lol.

AndySAXO^p · 22nd March 2011, 20:52

Yer well have to see, dnt plan to go too hard at the ring, just want to do it, and thought why not.

The s1 box will be right for most tracks in the uk, ones like silverstone, and bigger tracks, then maybe bit short but most uk tracks it will be spot on, really works well with my engine IMO as mine is a very pesky power curve.

Ryan^p · 22nd March 2011, 21:02

Quote:

Originally Posted by AndySAXO

The s1 box will be right for most tracks in the uk, ones like silverstone, and bigger tracks, then maybe bit short but most uk tracks it will be spot on, really works well with my engine IMO as mine is a very pesky power curve.

you kidding? seen the size of the straights at silverstone? Im hitting over 120 on the short straight at brands let alone hanger straight etc...

The rev drops between gears are exactly the same as all the other sports boxes as the clusters dont change.

AndySAXO^p · 22nd March 2011, 21:13

I meant to silverstone is abit too long of a track for s1 box, and I know that, but it pick the revs back up faster as there less teeth on the FD, so it gets back to the peak power rpm faster, which helps and suits my car better.

Ryan^p · 22nd March 2011, 21:20

Quote:

Originally Posted by AndySAXO

I meant to silverstone is abit too long of a track for s1 box, and I know that, but it pick the revs back up faster as there less teeth on the FD, so it gets back to the peak power rpm faster, which helps and suits my car better.

The rev drops are the same so you will still be dropping back out of the powerband if its peaky. Which is why us NA boys have trouble with the MA boxes. In gear performance should be better in the powerband (as expected)

What cams are you using for it to be peaky anyway?