Lazer zxr

[Joe Kimble]

Originally Posted by Welshy40

Ok done. As my alloy rear pivot blocks are bent in knocked straightish and drilled a hole in the middle. I added a 2.8mm spacer and filed a flat spot on the pole which goes across my gearbox above the pivot block so it fits flush with the washer and the drilled a hole thru the middle of the pole and screwed together and fits perfectly without and belt touching issues.

Whats needed is a new pivot block with a centre indent at the bottom centre as well as a screw hole so a lock nut can be placed within the pivot block.

I'm not sure I understand what you're doing. could you post a pic or 2?

[olefiloux]

Just for information.. is there a lot of ZX R parts fitting ZX S? or are they just different?
I can have a ZXR but not sure to be so interesting for my ZXS quest with Welshy parts......

[Welshy40]

Originally Posted by Joe Kimble

I'm not sure I understand what you're doing. could you post a pic or 2?

A few of us are redesigning the rear gearbox. Im starting it off and have done away with the plastic rear gearbox casing and now have in place two carbon fibre plates (pictures are several pages back on page 142) and have filed down the rear mount and designed the CF plates to fit into it so you can bolt the rear of the gearbox to the mount directly and the front mount has been the issue. I have used the pivot block and the pole that is a support between the two CF plates is being used as a mounting point onto the pivot block.

Now all I need is a layshaft and then game on.

[Welshy40]

Originally Posted by olefiloux

Just for information.. is there a lot of ZX R parts fitting ZX S? or are they just different?
I can have a ZXR but not sure to be so interesting for my ZXS quest with Welshy parts......

For the ZXS then the wishbones, fornt and rear hubs, steering (plate is slightly different but you could use a ZX one), slipper and layshaft is the ZXRR hyperclutch, lay shaft pulleys are the same as the ZX and ZXR, Ujs are the same as well as the hexes and the diffs are the same. Rest is not but chassis, top deck, front and rear shock towers, servo plate (I designed that one to use a kimbro serv saver) steering plate and gearbox plates and brace are all available at fibrelyte (link below) and bodyshell and gear cover and undertray at Kamtec (link below) but doubt youd find any of the other items you need to make the rest.

[olefiloux]

Thanks Welshy.. so i understand that its' better to go from a ZXR.... and to wait your "carbon gear box"...

[olefiloux]

Originally Posted by Welshy40

Well here it is, only one screw hole in roughly 1mm out of place but hey, its not bad for a second attempt. As you can see the two areas where the gearbox will bolt to the chassis, one on top of the pivot block which I still have to design and the rear tower mount where its almost perfect.

This is going to be a first as I don't recall seeing a car with a total cf gearbox. Comments welcome.

Did you already run this carbon gear box??
Don't you think it could be "noisy" ( hard stuff and vibrations...)

thanks a lot.

[oosh123]

my version of layshaft's design should be ready tomorrow.

a prototype should be able to be manufactured by the end of the week.

There will be a few changes to my original design as upon recieving the B4 slipper plates, I found out that the B4 uses a larger diameter shaft.


Welshy, why don't you try counter sinking the bottom of the pivot block & tap your filed shaft. This way, your can mount your pivot block on your gear box from the bottom first, then mount the lower chassis to the pivot block.

[Ema]

Originally Posted by Joe Kimble

You're right, and of course it is here that the discussions about these cars happen. But with time the building itself and the corresponding photos with drown in the flood of pages of this topic which will make the original building process from A to Z less accessible to people who would like to view it... I know that I really enjoy going through Ema's topic "A Lazer Zx-r for racing", since it's short and shows the evolution of the project, picture by picture.

So maybe there should be a dedicated topic for the project (a bit like a showroom), but all related questions and discussions would happen here (I would post the related pics here too anyway).

No?

I'm glad that you enjoy my build thread .
Building that Lazer was a sort of challenge because I still think that this is a great car. I like running my ride among modern cars especially when some one recognize that this is a 20 years old buggy and it is still nice and fast .

Looking forward to see your build thread and have fun with yor buggy !!!!

Bye
Ema

[Welshy40]

Originally Posted by oosh123

my version of layshaft's design should be ready tomorrow.

a prototype should be able to be manufactured by the end of the week.

There will be a few changes to my original design as upon recieving the B4 slipper plates, I found out that the B4 uses a larger diameter shaft.


Welshy, why don't you try counter sinking the bottom of the pivot block & tap your filed shaft. This way, your can mount your pivot block on your gear box from the bottom first, then mount the lower chassis to the pivot block.

Cant wait for the layshaft, as I need one to fully test my gearbox.

Looks is what I am after as well so rather have a cut out in the middle (like a U bend in the centre of the bottom of the pivot block so a nut can go in there and the small headed screw will go in at the top through the pole stiffener so will be more appealing to the eye.

Im doing a cad drawing and will JPEG it for you. Maybe you could get an alloy one made.

[Welshy40]

Originally Posted by olefiloux

Did you already run this carbon gear box??
Don't you think it could be "noisy" ( hard stuff and vibrations...)

thanks a lot.

I run the same type of gearbox on my Lazer ZX-S and is not noisy at all and looks superb. In fact the tensioners in the gearbox give longevity to the belt so it will last much much longer than the original gearbox layout and will be able to with stand much more power so a more powerful motor. Im testing with a 4.5 motor when I can.

[olefiloux]

Great to read this. And for the front box, is there something special to wait, or zxr front gear box is what i can have best?

[Welshy40]

Originally Posted by olefiloux

Great to read this. And for the front box, is there something special to wait, or zxr front gear box is what i can have best?

At the moment we are developing the rear, however a design has been created for the front by Oosh123 but what I recomend doing is first of all get your car built in good condition and when parts do become available then you are more than welcome to upgrade and enjoy.

[alcyon]

i checked with the machinist last week and he says he will check with his man. which ususally means the guy did not do anyhting throughout this whole time and he will probably rush to get it done for me...hopefully, well thats what happened with my Diff outdrives i ordered the last time for my TC.

[Welshy40]

Guys, ok here are my pics of what I have done so far. FYI the chassis is the same one I broke in January but have copied the ZX-S design and made my own three piece chassis, ok badly but at least I can test before the chassis totally dies. There is flex but minimal at the moment. May do until my tubs done.

Still I couldn't take pics of the pivot block holding it in however its all fitted flush to the chassis and fells quite nice. There is freedom in the drive train and I had to use a shim on either side of the rear diff to get it perfectly balanced and fitted. Only issue now is the slipper will slip big time so now need a layshaft to fit so hoping that ones available soon for some serious testing.

Oh yeah, blue looks stunning on this Oosh123

[oosh123]

Design Phrase Done!

[oosh123]

Originally Posted by Welshy40

Guys, ok here are my pics of what I have done so far. FYI the chassis is the same one I broke in January but have copied the ZX-S design and made my own three piece chassis, ok badly but at least I can test before the chassis totally dies. There is flex but minimal at the moment. May do until my tubs done.

Still I couldn't take pics of the pivot block holding it in however its all fitted flush to the chassis and fells quite nice. There is freedom in the drive train and I had to use a shim on either side of the rear diff to get it perfectly balanced and fitted. Only issue now is the slipper will slip big time so now need a layshaft to fit so hoping that ones available soon for some serious testing.

Oh yeah, blue looks stunning on this Oosh123

Welshy,

That looks awesome! you sure we can't use the 4 holes at the bottom??

Hopefully I will get my prototype at the end of this week.

[Naushad]

That looks really good!! Well done!

Will there be any issues with weight/distribution or will the final car be comparable to the ZXR?

[Welshy40]

Originally Posted by oosh123

Welshy,

That looks awesome! you sure we can't use the 4 holes at the bottom??

Hopefully I will get my prototype at the end of this week.

You mean the chassis, no room due to the belt and zero space for manovering anything in so has to be the pivot block holes. Fyi ive redesigned the cf gearbox plates and removed some uneeded holes. Also im going to get the cf pivot blocks right and fitted along with cf motor plate. As this will be the first may as well go ott and get the very first made tub chassis as well.

[Welshy40]

Originally Posted by Naushad

That looks really good!! Well done!

Will there be any issues with weight/distribution or will the final car be comparable to the ZXR?

Weight should be roughly the same as its a zx in carbon fibre, just stronger and better due to being able to keep tension on the rear belt so giving a much longer belt life. With slipper clutch from oosh123 fitted the car gains half a lap or more in a race.

[oosh123]

Originally Posted by Welshy40

Weight should be roughly the same as its a zx in carbon fibre, just stronger and better due to being able to keep tension on the rear belt so giving a much longer belt life. With slipper clutch from oosh123 fitted the car gains half a lap or more in a race.

Really? it will gain that much?? You can easily be the top 40 then =)

About your open rear gear box. How easy is it to fit a cover for it? As there is no indoor carpet here in Vancouver. I need to protect the gear box from the environment of dirt, sand, and dust.