vacuum advance dizzy and boost ???
 

well im going to turbo a 89 mazda 323 b6 sohc.
for fuel im going to use a fmu (i know everyone hates them,
but there is not much support for an old mazda, + im going to go as
cheap as possable with left over parts)

now to my ?
The dizzy on the b6 sohc has vacuum advance, well if you are
under boost that = no vacuum.
can anyone help me with this, or have any ideas?
thanks

Re: vacuum advance dizzy and boost ???
 

B6 is same backbone as Miata's B6. They love the Megasquirt. Less wires than your stock ECU to hook up, and you can crank and drive off the packaged basemap.

Re: vacuum advance dizzy and boost ???
 

im not going standalone,im using left over parts.
i have to much money into my other 2 boost cars(escort gt's). going
true hmt on this one,plus im really broke right now.
thanks for the reply though.

Re: vacuum advance dizzy and boost ???
 

True HMT is doing whatever you have to for a quality solution. Shiny underhood parts are without fail useless as JB weld blobs everywhere work fine if you are smart about it, but how long your ---- holds together is where your HMT pride comes from. The '86 SE-i I had came with something stupid like 160cc injectors. It was a fine beater, I drove it to the crusher at 320K miles because I was sick of being seen in it and it wouldn't die, but you try to run and FMU on tiny ---- injectors like that and you'll just kill fuel pumps while making very little power before the whole works starves for fuel and goes tits up.

$330 for a pre-assembled and ready to go EMS is chump change, bubba. Your car will start up, idle, and the ignition map for the 1.6 and 1.8 B6 engines is known and will be flashed to the MS. You can adjust VE maps with a borrowed wideband with a lot of success... if cavemanning it, you can set part throttle VE mappings with stock O2 and then read plugs under boost.

Re: vacuum advance dizzy and boost ???
 

were can you get a ms for 330 assembled and what version?
total understand the whole MS thing i have one on one of my escort gt. i don't really want to run much boost(around 6psi) on this car right now, its going to be a winter car anyway(im from WI).
maybe i will look into the ms, if the price is right, i have a wideband too.
thanks
also anyone else have other ideas besides going standalone.

Re: vacuum advance dizzy and boost ???
 

wouldn't boost be like the opposite and retard it as it's not seeing vacuum? I dunno...I'll just shut up cause I probably don't know what I'm talking about.

Re: vacuum advance dizzy and boost ???
 

you can install one way's, or just run it from the intake side of the turbo..

like how vac boosters on brakes have one ways, they keep boost from blowing them up

Re: vacuum advance dizzy and boost ???
 

both post above make good points.
if i just left it alone like the factory, i think it would go back to base timing under boost, seeing boost = no vacuum.
i would think the car would run like ass at base timing at 2k and above rpm,i don't no for sure. maybe some turbo carbed guys can chime in, seeing most older cars run a vaccum advance dizzy.
thanks

Re: vacuum advance dizzy and boost ???
 

I'll get to deal with this soon as my Z runs the same thing and my kit is being installed and should be running in a few weeks.

Re: vacuum advance dizzy and boost ???
 

maybe you can talk to your 240 or 510 turbo guys and see what they do?
thanks

Re: vacuum advance dizzy and boost ???
 

anyone else have any ideas.

Re: vacuum advance dizzy and boost ???
 

If you need VAC then you'll have to run it to the intake side of the turbo. Or just lock the timing out.

Re: vacuum advance dizzy and boost ???
 

I wouldnt do what he just said ;). You dont want your dizzy to advance when on boost! Just leave it the way it is, on a nother note 8) does it have mechanical advance?

Re: vacuum advance dizzy and boost ???
 

mechanical isn't enough unless you have a custom distributor and weights set made for massive amounts of timing adjustment

Re: vacuum advance dizzy and boost ???
 

im going to just try it the stock way is routed now and see what happens.
thanks

Re: vacuum advance dizzy and boost ???
 

anyone else?

Re: vacuum advance dizzy and boost ???
 

if its vacuum AND mechanical, disconnect the vac.

Re: vacuum advance dizzy and boost ???
 

i thinks it's both vac and mech.
i have talk to some 1G Integra guys about boost with vac. advance dizzy and they just ran the dizzy with no mods, stock form.
thanks

Re: vacuum advance dizzy and boost ???
 

If you just want to completely build it from the junkyard get a fuel pump from a turbo dsm and make it work then find out what size injectors you have and get if their like 160cc's like Jd said , find some that fit that are a little bigger. and drop those in then run the fmu. It'll Idle rich but it may run in boost.

Ahhh ---- that just find some cash and buy a MS .Heres a link that talks a little about vacuum advance distributors and stuff.
From what this says you may be ok at low boost but probably not.

http://www.centuryperformance.com/timing.asp

I'm just saying this ---- off the top of my head. Ive never done any of it. But it's what I would try if thats all I had and I had to outrun those guys from the madmax movies to save or gas tanker and get to the place in the postcard picture.

Re: vacuum advance dizzy and boost ???
 

DMC1 wrote:::::
Ahhh ---- that just find some cash and buy a MS .Heres a link that talks a little about vacuum advance distributors and stuff.
i didn't see a link.

Re: vacuum advance dizzy and boost ???
 

If your running manly boost numbers then it's just gonna bitch slap that dizzy so it will be retarded. Nuff said. Manly boost is the cure to anything.

Re: vacuum advance dizzy and boost ???
 

yes manily boost it great, but this is my winter ride, just want a little more hp, stillnoturbo you know how WI winters are.
also the point of this project is to do it with mostly left over parts, and as chaep as possable.
thanks