adbradley

iTrader: (2)

Im wondering if it is safe or possible for a 1.6 to run on 6-8psi intercooled boost getting plenty of fuel, without any kind of boost activated timing control? I know the base timing would have to be set pretty low, but it still be drive able? Has anyone done this? please let me know.

Adam

bripab007

Yes, people have done it for years, but the car will feel crazy sluggish when out of boost (which is probably 85% of most people's driving).

Mach929

iTrader: (3)

i had mine set at 6 degrees for a while before i got my emanage, it's not really all that bad.

adbradley

iTrader: (2)

about what range will my base timing have to be set to?

adbradley

iTrader: (2)

oh, answered my question right there

adbradley

iTrader: (2)

anyone know of anyone that has built something to retard the timing other than dick bipes??

UofACATS

iTrader: (1)

There's the MSD. Is that what you were asking?

adbradley

iTrader: (2)

no i know about that one too, im thinking more along the lines of a DIY electronic rig.. not as good as the msd or bipes, but better than nothin

adbradley

iTrader: (2)

to bad u cant just add some resistance somewhere and get the timing to decrease

UofACATS

iTrader: (1)

That's what I thought you meant. MSDs come along every now and then on the cheap as people get bipes, but not so much any more. Bipes tend to hold most of their value too.

I am electronically challenged so I'm no help otherwise

turbored

i run 10 degrees on 6psi w/91 octane cali gas and my car runs fine.

bripab007

Everyone gets different results, but if you've got a big enough intercooler and water injection and have 93 octane gas, you could probably get away with stock timing (10 degrees) at 6-8psi.

adbradley

iTrader: (2)

ok i feel a lot safer now

bripab007

It would be good to know what knock/ping sounds like, though, if you go this route. Have you experienced it on a car (or the Miata) before?

Braineack

iTrader: (62)

I was running 6° first time I went on a dyno. Picked up like 20-30hp increasing it to 16° and pulling with the Bipes. Night and Day difference in low-end power delivery.

Just tune to whatever doesn't knock, you can always richen up the mixture a tiny bit and run colder injectors to help battle it.

adbradley

iTrader: (2)

yea, ive experianced knock before, i know what to listen for, i wasnt sure if it would even run with the timing that low though. i think i will try to run it at about 8 deg..

This is my plan,

The car is my daily driver.. so i want to be able to drive it, and i dont want to spend the money on a bipes just yet, but i will get some some time. But i have almost everything else to install the turbo, intercooler, and FMU, so i wanted to get everything hooked up, and start adjusting things to get it running good enuff to drive.

fatty

i spent about a month googling and asking lots of questions trying to figure out a way to do this.
i found out how the cas signal is generated and figured out that it just needs to be delayed by an unknown amount, so i thought maybe you could just insert a very short digital delay that would switch in at a given rpm or something. i kinda had a theoretical setup worked out in my head but never got around to building it as i decided to go the megasquirt route.

if my idea proved to be workable, you could probably do it for less than $50.
but for the sort of time and effort it would take to get this to work properly, you're probably bettter off just getting a bipes.

adbradley

iTrader: (2)

this is very true, i just hate letting go of 200 bucks.. i know its worth it, but im just cheep, and if there is .001% of a chance i can build something that will do part of the job, im always willing to try, guess im crazy like that.

the signal from the cas is not much more than a analog sine wave type signal isnt it?

fatty

its a pulse signal i think.

magnamx-5

iTrader: (7)

i believe it is a two position pulse signal