Srtaight Cut drops V Standard Helical ?
Turbo Mini Forums

Greater bearing surface with the needle rolllers.

Own the day

For your interest:







Did a spy on harry's latest method of resolution yesterday... :)

Regards,
Andreas

http://www.minifreunde.at

Absolutely brilliant! Great!!

Am I right in saying this is an oil fed bearing with a small hole in the idler to feed the transfer housing side? If so this looks very good.

If something is worth doing, it's worth doing half of.

You are right.

http://www.minifreunde.at

fancy selling a conversion kit?

If something is worth doing, it's worth doing half of.

I'd have that in a high performace (200+ bananas) engine

If it is a hole through the thrust face(s) of the gear, so only one side needs pressure feeding...... very clever !!!

What are the screwed in place thrust washers (I assume the one in the transfer housing is the same) .... is it bronze or something else ???

Schrödinger's cat - so which one am I ???

very very clever!!

Yes i moved to the darkside

Instagram @jdm_brett

Yes, only one side is pressure fed - oil comes through the idler to the other side where the another bronze washer is screwed to the transfer housing....

In my last try I let the bronze washer rotate - there I only cared about the gearbox side...now the transfer side was also worn a little bit, so I decided to this setup now:

here is my old setup - if interested:
http://www.minifreunde.at/harry/links/oilpressure.htm

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

Harry, I remember the original idler mod and was intrigued. True wizard!!

How did you get on with the idler bearings packed with the rollers? I like the idea but it has been suggested that the rollers next to each other would cause them to slide rather than roll.

If yours have held up with 200hp+ then Im doing it :) Most they would ever see in my engine is 6000miles

Hi Sprocket,

never heard about the "sliding" thing- I am using this mod already for 3 years @ 200hp+ now with no problems.

@axial needle roller idea: I was thinking about the same a few years ago - what was keeping me away was the problem of finding the right clearance - if too much there would be a shock load on the bearing each acc pedal load change....that' why I moved to the oil pressure supported journal bearing....

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

When I build my turbo engine, I feel this idea may require plagerising!

Helical box or SC?

If something is worth doing, it's worth doing half of.

so is there a matching bronze bush in the transfer side? or is that still just running on the alluminium?

yes, matching bush on the other side...looks exactly the same as on the gbox side....

box is SC - only transfer gears are helical because of noise...in Austria you have big trouble with police when your car is too noisy....

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

This is just what I am looking for.

Any change of a detailed conversion guide for us plebs?

If something is worth doing, it's worth doing half of.

Very ingenius Harry,
i'm off to photoshop a thread so i can claim to have thought of it first ,lol

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

MMMM, I have a few photos of this conversion which should pop up on our Austrian homepage soon.....

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

Patent Pending lol

Just found an old info on our Austrian homepage -I am doing this full filled idler bearing and bronze stuff since 2005 - I hope this gives you a better feeling Sprocket..

http://www.8ung.at/pmf/updates2005/0210_zw...ad/wahnsinn.htm

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

Hello Guys, Impressive stuff this is, But... regarding Paul's original question. Here is my opinion why it failed. "machining tolerances" if you carefully measure a trans case and or flywheel housing you will see that the centerlines and concentric bushings vary wildly from case to case. causing a misalignment. One measurement i do is to remove the idler bearings and bolt the flywheel housing and trans together turn a shaft down to get a slide fit in the trans bore within .001 then slide it over to the flywheel housing bore you will see some will fit and others won't. one i had was over .015 out. not surprisingly the first motion gear had cracked teeth but had not broken off yet. and this was an 1100 three syncro combo someone had fitted a later vented housing to it. To test this take a diff side cover and chuck it into the lathe like you are fitting a cooper s bushing. you will see they all are at least .005 out and if you check other bores and clearances you will see the whole case is like this. so if you are running serious Hp and want it to last check your centerlines. Aaron

Racecar spelled backwards is Racecar

Inspird by Turbo Harry, here is my take on the pressure fed idler thrusts