re-curve bosch distributor

[slakjaw]

hi all

was wondering if its possible to change the distributor advance curve, its a 0 231 159 008. which i beleve is a T dizzy

the reason i am asking is my motor is no longer a T.
S, pistons, ports, L cams ect

its a 71, 911 2.2

anyone ever tryed this?
are there companys that i can send it to?


Thanks
Kyle
71 911

[dtw]

*bump* i wanna know too

[dean]

Call Steve at Rennsport Sys. Or Andial

[Fishcop]

This is totally do-able.

I recently had a Bosch 2.7 carerra dizzy re-mapped to replace my 69T Marelli dizzy. But sorry no recommendation to you (I'm in Australia).

[RoninLB]

Originally posted by slakjaw
anyone ever tryed this?
are there companys that i can send it to?

I bought a 2.7 RS dizzy for a carb install.. it was cheap/new.. I can probably find a shop that BA recommended if you are definately going to re-curve

[dean]

I forgot to say that if you have a timing light and can take apart a dist. you can do it yourself. You just need an assortment of springs.

[jluetjen]

...You just need an assortment of springs.

You can often get a good supply of springs from your local speed shop. You will also potentially need something like a dremel moto-tool in case you need to increase the advance travel, and some way to fill in the slots if needed. I've considered using some sort of permenant epoxy or having slots soldered, brazed or welded partially closed in case the total amount of advance needs to be reduced. I've never gotton that far so I can't say that I've tried any of those methods to shorten the travel.

[RoninLB]

Originally posted by Blown
I forgot to say that if you have a timing light and can take apart a dist. you can do it yourself. You just need an assortment of springs.

maybe he can find a local speed shop to re-curve it..

[slakjaw]

thanks everyone

here in Omaha Nebraska theres not much in the way of speed shops but there is one here that may be able to do it.

also
should i have it set as close to the S curve as i can or would something else be better for the setup i have.
S, everything... 1966 911 cams (L)

its a bizo because these dizzys were built for the specific motor S, E, T. so what happens when you have something that the factory never intended on.


Thanks again
Kyle
71 911

[jluetjen]

Given that you're running Solex cams which are the same as the early E cams, I'd recommend that you use the E distributor settings. The following data applies to both the E and the S distributors starting in '69.



You can compare the E to the S distributer curves below. Note that they are graphed against distributor speed which is 1/2 of engine speed.

[dean]

Summit Racing has advance springs. I am using a set in my 930. I nailed it on the second try