Gbs Zero Prop Shaft Length And Engine Position

[andyr0001]

Hi All,

 

I am hoping that someone out there can give me a little help please.

 

I am building a GBS Zero with a 2.0L Pinto engine, 5 Speed Type 9 box and standard Sierra diff. I have just got to the point in the build where i have dropped then engine and box in for the first time.

 

The box located on the gearbox mount which is located centrally in the housing apperture. I have removed a portion of the bell-housing to allow the box to sit centrally.

 

My question is that when the engine and box sit in position, there appears to be what i consider to be "a large ammount" of the plain diamter of the Prop shaft protruding from the end of the box. I have measured it as aproximatly 50mm from the extreme end of the gearbox to the start of the universal joint. As such, i do not believe that there is a great deal of spline and bearing engagement.

 

I have spoken to GBS about this and it sounds like there should be an ammount of plain diameter exposed, which allows for movement during driving.

 

I am keen to know if anyone can confirm to me what length their prop is (From the flange face that meets the diff to the extreme opposite end)

 

Also, with everything in position, the crank pulley on the front of the engine sits over the front transverse chassis rail. Can anyone confirm if this is correct position for this combination of components.

 

One final question - The rubber engine mounting bushes, which i beleive are standard Ford - can anyone confirm their width please? I am after a measurement from flat mounting face to mounting face. (I am concerned that the ones i have may be incorrect)

 

Thanks in advance for any advice that anyone can offer.

[ozz]

Hi

I have same engine and gearbox here is a pic of the gear box end of prop shaft with some measurements (please ignore the poor painting)

 

 

This one shows how far forward my engine is

 

Here you can see the engine rubber mounts on an early build of the engine (have bike carbs now not injection)

 

 

hope this helps

 

Andrew

 

Edited to show pictures (thanks RichardL for the tip)

[andyr0001]

Hi Richard and Andrew,

 

Thanks very much to you both for going to the trouble you have to help me with this - It is greatly appreciated! I have not had tme to get to the garage to have a measure up and check, but from what i can see in your pictures, i think the engine looks correctly positioned, but the prop-shaft is shorter than on your builds.

 

I will look into getting a replacement prop from GBS or the possibility of machining up a spacer to include in the assembly that would increase the length of the prop. I dont know if anyone has any thoughts on including a spacer between the diff flange and the prop-shaft? I am assuming that so long as it is secureley bolted with high-tensile bolts, there should not be an issue.

 

Thanks again

 

Andy

[brumster]

I attempted to have one very such thing made up. The machine shop cocked it up in the end, so I ended up not paying for it, but the bill was going to be just shy of £80 for labour and materials. In the end, I felt it was more cost effective to have a custom prop made up to the exact length - £125 all in. That was from 105speed. Other places can probably provide for similar money.

[Guest mower man]

I would not worry about the amount of space ,its aprox 1/3 of what actualy drives , the diff does not move ,its bolted to the chassis , the engine /g/box may rock a little side to side the prop cannot fall out! ,if you spacer it up you would have to take either eng .g.box or diff out to remove the prop, if all mounts are ok leave as is . mowerman