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Topic Review (Newest First)
02-20-2013 01:09 PM
ap72
Quote:
Originally Posted by thinwhiteduke View Post
Thanks Matt , yeah that's all doable i'm sure. you and costom10 have good points there. I'll prolly just do the little amp thing that f,bird mentioned at this stage, and go with full electronic spark control, as ap72 says, in the future.



Duke
FWIW, as already said I get a lot of my parts from wrecking yards (I'm a bit of a cheap ***) and with one little "major" expense (a MS1 controller) you can put together your own EFI/computer controlled spark system for less than $400 total- less than $200 if you're super tight ***.

You can also integrate a knock snesor if you want BUT I still think you're spending time looking in the wrong direction. Even if you only spend $100 on your complete project a good EFI/spark controller will be MUCH more beneficial for durability, power, and mileage- not to mention temperature swings and is not much more. Hell, easily within a year it will pay for itself, if you have a crappy carb it could be within a couple months.

Oh, and my plates read "AP 72" the plates came first, then the user name.
02-20-2013 12:56 PM
thinwhiteduke
Quote:
Originally Posted by morcey2 View Post
Building on what Custom10 has said, the 82-86 ( I think ) LE9 305 engines come with electronic spark control that has an HEI distributor that has a 5-pin module, a distributor with a 4-pin computer connection AND vacuum advance AND mechanical advance, a tip-in sensor (for automatics only, I think), and a knock sensor. In theory, it should be transplant-able into any sbc, but I think the knock sensor itself would require some experimentation to find the right one.

Matt
Thanks Matt , yeah that's all doable i'm sure. you and costom10 have good points there. I'll prolly just do the little amp thing that f,bird mentioned at this stage, and go with full electronic spark control, as ap72 says, in the future.



Duke
02-20-2013 12:41 PM
thinwhiteduke
Quote:
Originally Posted by Custom10 View Post
There are some special pin HEI distributor modules that provide spark retard functions of about 5 degree's when the correct pin is wired to ground. Perhaps you could find the correct knock sensor that would allow you to do this by simply wiring the pin through the sensor to chassis ground, you may need a relay. I think some of them needed the pin to see 12 V to do the same thing.

Wire a toggle in series to disable the trigger and maybe another toggle to manually force the retard function for starting up an agressively timed motor etc etc etc.

This could be a popular mod if we can figure out a basic configuration for it, me thinks it has been done.
Me thinks that's a bloody good idea too!


Duke
02-20-2013 12:39 PM
thinwhiteduke Thanks ap72 , I understand now that without a computer than all I got is pretty much an idiot light but that's all I'm really after. I like the sound of f,birds little amp.
I got no ping ATM, at least not that I can detect. Just thought it might be a handy thing if I get a bad load of fuel while I'm out of town.

I was in line at McDonalds yesterday morning ,at my daughters request I must add, and this guy was pulled up in front of me....just had to take a photo, ha ha!


Duke
02-20-2013 12:35 PM
ap72
Quote:
Originally Posted by Custom10 View Post
There are some special pin HEI distributor modules that provide spark retard functions of about 5 degree's when the correct pin is wired to ground. Perhaps you could find the correct knock sensor that would allow you to do this by simply wiring the pin through the sensor to chassis ground, you may need a relay. I think some of them needed the pin to see 12 V to do the same thing.

Wire a toggle in series to disable the trigger and maybe another toggle to manually force the retard function for starting up an agressively timed motor etc etc etc.

This could be a popular mod if we can figure out a basic configuration for it, me thinks it has been done.
If you're going through all that effort then just go with full electronic spark control with either HEI, EDIS, or COP. HEI and EDIS are both relatively cheap and easy to do. COP requires a cam sensor which can complicate things (adding a crank sensor is much easier).
02-20-2013 10:15 AM
morcey2 Building on what Custom10 has said, the 82-86 ( I think ) LE9 305 engines come with electronic spark control that has an HEI distributor that has a 5-pin module, a distributor with a 4-pin computer connection AND vacuum advance AND mechanical advance, a tip-in sensor (for automatics only, I think), and a knock sensor. In theory, it should be transplant-able into any sbc, but I think the knock sensor itself would require some experimentation to find the right one.

Matt
02-20-2013 09:58 AM
Custom10 There are some special pin HEI distributor modules that provide spark retard functions of about 5 degree's when the correct pin is wired to ground. Perhaps you could find the correct knock sensor that would allow you to do this by simply wiring the pin through the sensor to chassis ground, you may need a relay. I think some of them needed the pin to see 12 V to do the same thing.

Wire a toggle in series to disable the trigger and maybe another toggle to manually force the retard function for starting up an agressively timed motor etc etc etc.

This could be a popular mod if we can figure out a basic configuration for it, me thinks it has been done.
02-20-2013 06:56 AM
ap72 Sorry I took so long to reply, got distracted. The links provided give you a good DIY start, BUT without tying it into computer controlled fuel/ignition you're very limited on how useful it will be. It can work as an "idiot light" so to speak but not really useful for tuning.

Also it is very easy to get a false reading with aftermarket valvetrain or sometimes pistons or a very worn engine block.

You may be better off just tuning it the "old fashioned way" with plug reading, vacuum reading, and some common sense starting points.
02-19-2013 09:46 PM
thinwhiteduke Thankyou VERY much f,bird. That's EXACTLY the kind of system I had in my mind, simple amplifier, it's just gotta work!
BTW what tranny you running in you car, is the a two speed or three speed?
Looks real quick on the u-tube vid, 👍 what's your q/mile?

Duke
02-17-2013 03:16 PM
F-BIRD'88 DIY Detonation detector

and amplified engine ears ( part II)

I built these simple low cost but effective engine ears using similar stuff as the article shows, that I sourced from Radio Shack, here. They work. Clip the mic to a bolt or...on the side of the engine block near the frost plugs.

AutoSpeed - DIY Detonation Detection - Part 1
AutoSpeed - DIY Detonation Detection - Part 2

reference Radio Shack PN 33-1096
02-14-2013 04:47 PM
thinwhiteduke
Quote:
Originally Posted by gearheadslife View Post
THEY GO IN THE block.. the sensor for a 305 is different than a 350
if you have aftermarket parts they can set them off..
you have to torque the sensor per factory manual

I'd have to look to see how they are wired.. to know what terminal to hook it to on relay
Thanks gearhead, everything is aftermarket , bar the block, crank and rods.
It's starting to look like I might be need ing some form of computer .
I'm learning, so that's always a good thing!

Duke
02-14-2013 04:40 PM
thinwhiteduke Thanks Spinn, that's helpful, it's the right price!,... And something I could handle..I'm studying that.

Duke
02-14-2013 03:15 AM
spinn here is a page of diy knock sensor info.
02-14-2013 02:55 AM
gearheadslife THEY GO IN THE block.. the sensor for a 305 is different than a 350
if you have aftermarket parts they can set them off..
you have to torque the sensor per factory manual

I'd have to look to see how they are wired.. to know what terminal to hook it to on relay
02-14-2013 02:47 AM
thinwhiteduke
Quote:
Originally Posted by gearheadslife View Post
WIRE IT TO RELAY AS ON/OFF trigger to a idiot light in dash.. it'll light when you are knock'n boots in engine
Wire what? Are you talkin bout wiring a knock sensor? Pardon my ignorance, I CAN wire stuff, but I got nothin to wire ATM.
Assuming that yor saying to wire a knock sensor, where does that go? In the head I guess..do I have to tap a hole?or does it go in one of the water plug holes, just like a temp sender unit?
Sorry if I come across as 'dumb', please bear with me, I'm living in the past...LOL
I have never even seen such a beast ( knock sensor).

Thanks for you help..

Duke
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