RV8 - Dizzy drive dimensions

adamnreeves · Post by **adamnreeves** » Thu Feb 15, 2007 9:15 am

After a favour. I am going to make a dizzy hole plug for my intermediate timing cover. For this I am going to copy the lower part of the dizzy.

Could someone take some measurements for me.

Essentially I require the measurements demonstrated in the photo below.

jrv8 · Post by **jrv8** » Thu Feb 15, 2007 9:55 am

Hi,
If you cover the p/p, I'll send you an old distributor body, free of charge.
Might be easier to convert, rather than starting from scratch.
Regards
Jim

adamnreeves · Post by **adamnreeves** » Thu Feb 15, 2007 10:52 am

Thanks much appreciated. You have a PM.

jrv8 wrote:Hi,
If you cover the p/p, I'll send you an old distributor body, free of charge.
Might be easier to convert, rather than starting from scratch.
Regards
Jim

Post by **katanaman** » Thu Feb 15, 2007 11:48 am

You only need a plug on the intermediate cover so why are you copying the whole bottom of the dizzy? You don't need to retain any of the oil pump drive so a circular bung with an o ring that fits the hole in the cover is all you need.

adamnreeves · Post by **adamnreeves** » Thu Feb 15, 2007 12:01 pm

Yep thats what I intend on doing. I am not going to install the gears. I just want it to be an exact and neat fit.

katanaman wrote:You only need a plug on the intermediate cover so why are you copying the whole bottom of the dizzy? You don't need to retain any of the oil pump drive so a circular bung with an o ring that fits the hole in the cover is all you need.

adamnreeves · Post by **adamnreeves** » Tue Feb 20, 2007 9:01 pm

Thanks to JRV8 sending the bottom part of the dizzy body. I pretty much replicated it as I know a man who has access to CNC milling.etc.

Look at this. I think if I were to get another one done I would have it bored out a little in the centre to save some weight, but fits very well and nice and shiny.

If anyone wants one done let me know!

Post by **katanaman** » Tue Feb 20, 2007 10:49 pm

Why did you make it so long? I cant see it serving any purpose other than say 10mm below the o ring and you wouldn't even need that much.

ihatesissycars · Post by **ihatesissycars** » Tue Feb 20, 2007 10:53 pm

Yes please i'll have one! I have the same cover as you minus the dizzy!

Wotland · Post by **Wotland** » Wed Feb 21, 2007 8:42 am

Hi,
Last month on Ebay there was distributor blank plus for RV8 http://cgi.ebay.fr/ws/eBayISAPI.dll?Vie ... &rd=1&rd=1

seight · Post by **seight** » Wed Feb 21, 2007 11:21 am

Looks good Adam.
I had one thought - do you need a section that sticks up so the dissy clamp can't move? You are using a clamp to hold it in aren't you?

Have you sourced your timing cover socket cap screws yet?

Mike

adamnreeves · Post by **adamnreeves** » Wed Feb 21, 2007 2:43 pm

Oh dear. Looks like I might have to get another dizzy plug done then! I do not have the clamp and assumed (the mother of all c*ckps) that this part of the dizzy drive would not be needed. Looking at the one on Ebay looks like it does need it! I think I will get another one done and make shorter as katanman suggests. Also bore out to make a little lighter.

The UNC cap head screens I am failing to get hold off. I know I can get longer and cut down but I do not like doing that. I might just go for the OEM hex bolts.

seight wrote:Looks good Adam.
I had one thought - do you need a section that sticks up so the dissy clamp can't move? You are using a clamp to hold it in aren't you?

Have you sourced your timing cover socket cap screws yet?

Mike

adamnreeves · Post by **adamnreeves** » Wed Feb 21, 2007 2:46 pm

I am assuming you will want my 2nd generation version!
I will get autocad going tonight and make some changes to my design and get some more made up.

I will submit the design here later so if anyone else wants one then let me know so that I can get a batch made if required.

ihatesissycars wrote:Yes please i'll have one! I have the same cover as you minus the dizzy!

adamnreeves · Post by **adamnreeves** » Wed Feb 28, 2007 8:54 pm

I have worked on a second generation dizzy plug. I have not got a clamp but I know the dimensions from the dizzy but not knowing the height of the little bit on the top I have made it 10mm. It can always be cut down.

I am going to get two made, one for me and one for someone else, ihatesissycars can have first dibs. I will of course check it fits the cover first. Do not know how much it will be yet, but the last one cost me £15 and this one uses half the material.

All external edges will have a slight chamfer.

deetes · Post by **deetes** » Fri Mar 02, 2007 8:55 am

katanaman wrote:You only need a plug on the intermediate cover so why are you copying the whole bottom of the dizzy? You don't need to retain any of the oil pump drive so a circular bung with an o ring that fits the hole in the cover is all you need.

My dizzy drives the oil pump. Is there anyone making plugs with the oil pump drive?

adamnreeves · Post by **adamnreeves** » Fri Mar 02, 2007 11:20 am

Intermediate and later timing covers have the oil pump driven directly by the crank using a cresent pump built into the timing cover.

deetes wrote:
katanaman wrote:You only need a plug on the intermediate cover so why are you copying the whole bottom of the dizzy? You don't need to retain any of the oil pump drive so a circular bung with an o ring that fits the hole in the cover is all you need.

My dizzy drives the oil pump. Is there anyone making plugs with the oil pump drive?