Can the Milzy Motorsports 7x crank trigger be used with the Fiero pulley (I've heard both ways), or will I need to modify my damper like as shown below?

I would like to install a LX9 3500 using my Fiero accessory drive.

https://www.fiero.nl/forum/A...110502-2-101029.html

This is the crank trigger I'm referring to:

Before you pull the trigger on buy a crank trigger, have you determined that a lx9 ECU is untunable? They are much better than the 7730 could ever be.

I have not - but I would have no idea how to hook up the 3500 computer to my instrument cluster, for instance. I feel like they wouldn't be compatible.

Run it off a different 3400 computer? Check out gmtuner.com or gmtuners.com for great diagrams and writeups.
(I think it is darth's site?)
Just finishing up a 3.1 tgp hybrid build and in process of figuring out pcm I want to use.
In my digging i've seen reference to people simply using the earlier pcms to run the 3500.

I have a 3500 build I will start when this one goes in,but i've yet to mess with any of the pcm stuff yet.

Offhand,on my hybrid build I am in the process of mocking up a 3.4 camaro balancer which has the reluctor already.
The cam sensor should bolt right up where the factory timing tab bolts in if your using the 88 front cover.
I will confrim this as soon as I can find the damn sensor somewhere
Not sure yet how the other accesories will bolt up however,the camaro water pump and pullys seem to sit out quite a bit farther than the fiero or 3400 stuff.
But could be an option for people who have plenty of spare parts laying around

quote Originally posted by FieroWannaBe: Before you pull the trigger on buy a crank trigger, have you determined that a lx9 ECU is untunable? They are much better than the 7730 could ever be.

Unfortunately I have not been able to find any custom tuning software that will tune the factory LX9 computers. What is available can tune computers that were used on the later 3500 and 3900 engines that all had VVT. I suppose it would be possible to custom tune a VVT ECM to run a non-VVT engine thru a lot of work.

The older generation OBD2 PCMs (3400 LA1, for example) can be custom tuned to work with the LX9 but you must use both the 7x and 24x crank sensors. I think there is a guy making 7x crank reluctor wheels that will install INSIDE these LX9 engines on the crank which leaves room for the 24x balancer/crank sensor combo.

quote Originally posted by masospaghetti: I have not - but I would have no idea how to hook up the 3500 computer to my instrument cluster, for instance. I feel like they wouldn't be compatible.

Nothing on the stock Fiero instrument cluster needs to interface with a 3500 computer. Oil pressure and temp gauges get their signals directly from engine mounted sending units. The tach can get a signal directly from a terminal on the 7x DIS module. The speedo can stay hooked up directly to the trans-mounted VSS (if you are using a stock Fiero transmission), or it can use a 4k ppm output from a newer PCM if you build a conversion circuit like what I have posted here: http://www.gmtuners.com/fiero/fmods.htm

-ryan

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OVERKILL IS UNDERRATED

Custom GM OBD1 & OBD2 Tuning | Engine Conversions & more | www.gmtuners.com

Marc with british car conversions makes a internal 7x wheel that can be installed on the 3500 crank, this is made possible because the 3500 uses a pressed on wheel, unlike the machined wheel the 3400 used. I'll try to get you a link when I get home.

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we're in desperate need of a little more religion to nurse your god-like point of view...

Built not bought... Because bolt-ons don't.

https://www.fiero.nl/forum/Forum2/HTML/119122.html

There was a thread over at Real Fiero Tech where someone was using the Fiero drive system and claimed to have installed the 7x external crank trigger. However I have also heard this can't be done.

I feel like it would be easier to notch the harmonic balancer than to open up the motor and remove the crankshaft.

Or maybe I should just hook up the whole 3500 computer...hmmm.

What would I need to run the 3500 computer? Are there anti-theft devices and other modules I would need (like body control modules, etc)?

[This message has been edited by masospaghetti (edited 02-20-2013).]

here's your best bet.

http://britishcarconversion...d=128&category_id=28

the only other thing you can do it integrate the ring into the crank pulley. bolting something to the outer ring of the balancer would be a bad idea, as it the outer ring can slip.

I originally wanted to use Gravitic's step by step guide ( https://www.fiero.nl/forum/A...110502-2-103834.html ) and adapt it to the lx9. I also wanted to keep the 2.8 timing cover in order to reuse the alternator, compressor, dogbone, etc.... After much gnashing of teeth, I reverted back to the stock lx9 timing cover and the crank trigger from British car conversions( http://www.britishcarconversions.com ). I see there are now 2 crank triggers available for the lx9. One for FWD applications and another for RWD applications. You may want to contact them concerning which crank trigger to use to keep the 2.8 timing cover.

One of the main advantages of using the FWD crank trigger with the stock lx9 timing cover is the fact that migrating from obd1 to obd2 is much easier. All that's needed is the 24x balancer/crank sensor combo, a 3400 harness, and a late 90's venture ecm.

quote Originally posted by flimbob: I originally wanted to use Gravitic's step by step guide ( https://www.fiero.nl/forum/A...110502-2-103834.html )

I don't like this, we all know the timing marks move on our balancers I wouldn't want my ignition timing moving on me...

quote Originally posted by ericjon262: I don't like this, we all know the timing marks move on our balancers I wouldn't want my ignition timing moving on me...

I concur. I’d rather the timing reference be rigid on the crank.

Stinks about the LX9 Computer.
http://pcmperformance.com/programming.html

They claim to have the ability; you could contact them about what’s available to make it run.
Or a LA1 ecu is a better and easier to locate alternative to the '7730 IMHO.

edit:
http://www.msextra.com/foru...=101&t=39177&start=0
for posterity

The lx9 trigger is the same as an LS1 trigger.

[This message has been edited by FieroWannaBe (edited 02-21-2013).]

For what it's worth, I've never heard of a new balancer shifting..... Only 25 year old balancers. Plus, I never endorsed using that setup. I said, I went with the LX9 timing cover/ trigger wheel suitable for the 7730. I wasn't really interested in obd2 because I mated the LX9 with a 4t60. I had early discussions with Ryan ( Sinisiter ) concerning which auto trans would be compatible with OBD2. I believe the discussion led to the 98 venture ecm supporting a 4t60e and a 99 venture ecm supporting a 4t65. That was many moons ago and I've slept since then.... I kind of remember a thread in the last year or so from Ryan questioning if a 4t65 could actually be supported by the late venture ecms..... It turns out the thread was about using a venture obd2 ecm with with a LA1( https://www.fiero.nl/forum/Forum2/HTML/122271.html ) I do think the 2.8 balancer could be used with a LX9 swap, but I'm not going to do it for the obvious reason of having to buy a new balancer and then modify it, plus the issue of the balancer potentially shifting. If you use the trigger wheel instead of modifying the balancer, there would be the issue of how to correctly align the LX9 trigger wheel to the sensor location on the 2.8 timing cover mounting plate. Too much to think about as far as I'm concerned. Just use the LX9 timing cover, the trigger wheel setup, and all of the LX9 components( alt, compressor, belt system ) and notch the decklid.

[This message has been edited by flimbob (edited 02-21-2013).]

There are 3400 LA1 OBD2 PCM programs that can be made to support the use of any one of the following transmissions:

-Any non-electronic auto like 125-C or 440T4/4T60 (but TCC control by the PCM may not be available)
-Any manual transmission
-4T40-E/4T45-E
-4T60-E
-4T65-E
-4T80-E
-RWD 4L60-E (working on this right now with a customer - will know the results soon)

I can't help much with the ecm stuff, but I have an apu1 for chips and dhp powertunr for most v6 pcms if it is any help to your swap