Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: Grizzly on September 07, 2006, 06:46:40 PM

Title: end float?
Post by: Grizzly on September 07, 2006, 06:46:40 PM
For those of you who have done plenty of rebuilds, Do you find you get better results with the end float on the Tight side or the Looser?

I don\'t know if it will make any diffrence at all but i\'ve heard people try to get it mid way but i\'d have thought tighter would be better?? but as always it may not be a Bonus.

I would be intrested to know what you think?
Title: end float?
Post by: Timrxmotors on September 07, 2006, 08:14:23 PM
As long as you have some end play,don\'t worry.If still worried,then set to spec as in manual,using a dial guage.
Title: end float?
Post by: Grizzly on September 07, 2006, 09:46:52 PM
So as long as i\'m within the book spec i should be good.
Title: end float?
Post by: oldone on September 07, 2006, 09:58:11 PM
I go for a lil more than a ball hair thickness play,I like them tight.As Tim says .....:Typing
Alil tight just feels good and under control...:Thumbs-up
Title: end float?
Post by: Grizzly on September 09, 2006, 08:38:58 PM
Now this is going to sound Dumb!!

Im i right in saying the Bigger the spacer the tighter the end float is and the smaller the spacer the Looser?
Title: end float?
Post by: Grizzly on September 09, 2006, 08:40:45 PM
And is there anywhere i can check out the sizes of the Spacers so i know if the next one up or down will suit me better?
Title: end float?
Post by: oldone on September 09, 2006, 09:01:20 PM
Quote from: GrizzlyAnd is there anywhere i can check out the sizes of the Spacers so i know if the next one up or down will suit me better?
Mazda spares dept.,maybe they got a microfish for you to check, bud:Typing
Title: end float?
Post by: cjr on September 09, 2006, 10:22:56 PM
If you have end play all is good. But if you were say having fun with jody marsh and you had that much movement i would be worried:)
Title: end float?
Post by: oldone on September 09, 2006, 10:38:59 PM
Quote from: cjrIf you have end play all is good. But if you were say having fun with jody marsh and you had that much movement i would be worried:)
You all got your funny hats on tonight !!! LOLOLOLOLOL:yes :wiggle :guinness
Title: end float?
Post by: Grizzly on September 10, 2006, 12:52:39 PM
I\'ve been given this which helps so i\'ll put it on this thread.

Target is .0016 - .0028 @ 95lbs
Title: end float?
Post by: stuart wizy on September 10, 2006, 02:49:49 PM
you reduce the thickness of the spacer to make tighter.
If u know a small machine shop with a surface grinder you can take the required amount of in .0001" increments ie(1 tength of a though cuts) to hit your tolerance.
failing that bruce turrentine says rub on wet and dry and re check end float to get within tolerance, but this way your spacer wont be dead parallel.
If the endfloat is tight to start with, you need a thicker spacer and then do the above unless its within tolerance to start with.
Title: end float?
Post by: Grizzly on September 10, 2006, 02:58:59 PM
Yeh i\'m starting to think it would be wise to fit a Thicker spacer, my End float is .0010 which is a little tight (Thats dry) so i am thinking of getting the next Bigger spacer and posably take a bit of off to get it bang on.

I\'m just a bit Paranoid about killing the Trust bearings if its too tight.
Title: end float?
Post by: stuart wizy on September 10, 2006, 03:16:47 PM
same as my fd mate.
you need to work out your middle limit from your spacer that has .001" endfloat.  ie if midle tolerance is 0.0018" u need a spacer .0008" bigger than yours that read .001" endfloat.
if u get a bigger 0ne and want it grinding down to an exact size then give me a shout and i,ll sort it for u as acurate as you can possibly work out with your clock.
If u want a micron clock u can borrow mine, im only in oldham.
Title: end float?
Post by: cjr on September 11, 2006, 12:55:34 AM
If i have endfloat i am happy if i don\'t i pull front cover. But hey i don\'t have a micron clock ( what is that) if i am happy with how it went together that is good enough for me. Btw my big engines have all made over 450 so i guess my if your happy how the build went practice goes
Title: end float?
Post by: Grizzly on September 11, 2006, 06:19:40 PM
They must do it for a reason?
Title: end float?
Post by: cjr on September 11, 2006, 07:55:35 PM
they prob do do it for a reason. but for me if i have movement and i am happy that is more than enough for me. I suspect a lot off other people work this way
Title: end float?
Post by: Grizzly on September 11, 2006, 08:08:45 PM
Fair enough, but i still want to put the next size spacer in becouse i think To tight may cause issues with Oiling the bearings. But i can see your Point if its not broke why fix it?
Title: end float?
Post by: stuart wizy on September 11, 2006, 08:30:50 PM
micron clock is a dti that will read in micron .01mm increments for a more acurate reading, rather than using a though clock .001".
the target is .0018"  ( 1 though and 8 tengnths) which is a pretty tight tolerance if u ask me.
Im not trying to be a smart arse here boys but my trade is a machine tool fitter, in which we set a lot of end float up on all sorts of ball screws shafts gears etc to tolerances a lot higher than .0018", im just trying to help grizly out cause he wants it done to the book.
Title: end float?
Post by: Grizzly on September 11, 2006, 08:51:21 PM
LOL, What have i started.

Mr Wizy, I\'m going to sound like a muppet here but i\'ve been given a C spacer which has taken my Endfloat to .0042 i relise the more i remove the more unsquare it is going to become, Is .002 alot to remove whilst keeping it useable? I am fairly handy with this sort of thing but oviously not an Engineer? It doesn\'t look alot on the DTI but i have been wrong before ;)
Title: end float?
Post by: stuart wizy on September 11, 2006, 09:29:28 PM
0.0042"  is (4 though and 2 tengths) and your ideal target is .0018" (1 though and 2 tengths) so u need to get your spacer thickness measured as it is now, then take .0024" of your spacer thickness dimension, this will give u a size to make the spacer to.
eg..   if you measure your spacer and its  1" thick then Its required size would be 0.9976" to get your .0018" end float.
this stuff comes second nature to me cause ive done it for years but it did take me a bit to get my head round at first.
most surface grinders will grind to a tength of a though so u can get it bang on mate.