lz9 3900 V6 buildup

[Shaun41178(2)]

Yes I am using an Isuzu slave but a new one for a Getrag is a phone call to Rodney dickman.

Or I can shorten my slave rod and make adjustments at the master to lower the pedal closer to the floor.

Come drive my mustang and feel the pedal pressure. The fiero is very light right now in comparison. Going back and forth it took a couple pedal throws to get used to it again. Basically a stiffer pedal does not bother me.

Whats up with the Quartermaster twin? Its already proven to fit. Just need a proper throw out bearing right?.

[The Dark Side of Will]

It needs a pedal stop.

I have not done the math to see how it fits. I started working with Tilton stuff because I could get their engineering drawings from their website. I need to call QM and get a recommendation on which clutch family to use, then get engineering drawings for that package so I can fit it in the Getrag.

I'm not sure if the QM flywheel for the V6/60 is still produced. It's still in their catalog, but I haven't tried to order one.

Also, QM will sell a dual organic clutch. Tilton, at least a couple of years ago, would only sell a combo with one organic and one cerametallic disk. The QM clutch is probably friendlier for the street.

Also, there's been some talk about a "round faced" bearing for the Getrag to go with a QM. I've never seen one. The TOB needs to be a mechanical TOB like below, used with a custom holder that rides on the Getrag TOB guide and works with the Getrag TOB fingers... None of this is hard... it just has to be done.

This is a Tilton mechanical TOB with holder. They sell just the raw bearing by itself as well. Press the holder out of the old bearing, press the new bearing onto the holder. Making a new holder is a fairly simple machining process.

[Shaun41178(2)]

A new flywheel can be made like what qm makes if its no longer for sale. If its in the 2017 or 2018 qm catalog then it should still be available for purchase.

The setup Steven has should fit in a Getrag if it fit in the 4 spd muncie right? So now it just comes down to the to bearing for it.

You able to post pics of your bearing design?

If I got a hold of that qm flywheel I could have it duplicated at a local cnc shop

[Shaun41178(2)]

Progress is slow but its getting there. Might pick up a bit in the next month or two.

Got my heads back
https://youtu.be/UkuLiDNl0x8

[Shaun41178(2)]

So I got the engine on the cradle. Put the head on to measure pushrod length. Measurements are complete and just have to order them now.

I tried to attach a photo and even cropped it a few times but its still to large a file. So no pics

[The Dark Side of Will]

Bam!
You realize you can resize it with MS Paint, right?
Or Imgur

[Shaun41178(2)]

heads are on.

-12 an fittings for coolant output. to do this, headgaskets have to be reversed on installation since I turned the heads around from their normal orientation.

coolant temp sensor is in the head on the flywheel side now, and a plug on the waterpump side.

20200425_133922.1.jpg (210.41 KiB) Viewed 3383 times

20200425_133847.1.jpg (214.63 KiB) Viewed 3383 times

[pmbrunelle]

On my friend's 3.5 swap, I drilled and tapped that hole to 3/8" NPT.

We then installed a 3-wire GM temperature sensor:
2 wires for the ECM temp measurement
1 wire for the temp gauge in the instrument cluster (return current flows via the threads)

Just an idea. If you want the application information, I can ask him about it.

[Shaun41178(2)]

I might be wrong but I m assuming the coolant sensor is for the ecm input. If so I think it has the same plug as the factory 88.

I am not using the factory in dash temp gauge.

I have an aftermarket gauge for that.

So I just need the sensor to the ecm and also for the fan switch. Hopefully this 3900 sensor is compatible with the fiero ecm. I dont see why it wouldn't be

[pmbrunelle]

Yeah, it looks like it's the same sensor as the Fiero (ECM input) sensor, just with different threads. I think GM was pretty much standardized on the same temperature-to-resistance curve. If you wanted to be really sure, you could check your 3900 sensor with an ohmmeter to see if it agrees with the resistance values given for the Fiero sensor:
http://www.fiero.com/forum/Archives/Arch ... 30.html#p3

We used a combined 2-in-1 sensor because we couldn't find two good spots on the engine for the dash gauge sender AND the ECM sensor. We didn't have to install a fan switch since the ECM handled that.

[The Dark Side of Will]

We then installed a 3-wire GM temperature sensor:
2 wires for the ECM temp measurement
1 wire for the temp gauge in the instrument cluster (return current flows via the threads)

'96 Corvettes used this sensor, but GM spread it widely across the product lineup. I have one in my Northstar.

I might be wrong but I m assuming the coolant sensor is for the ecm input. If so I think it has the same plug as the factory 88.

I am not using the factory in dash temp gauge.

I have an aftermarket gauge for that.

So I just need the sensor to the ecm and also for the fan switch. Hopefully this 3900 sensor is compatible with the fiero ecm. I dont see why it wouldn't be

What you're showing is the 2 wire for the ECM.
What sender does your aftermarket gauge use? If it uses a normal GM 90 ohm sender, then you could use the 3 wire sensor that PMBrunelle mentioned.

We didn't have to install a fan switch since the ECM handled that.

Ditto. Ditch the fan switch and let the ECM handle your fan control.

[Shaun41178(2)]

There are a couple of npt plugs in the block for the cooling sensors. I will use those. I'll take pics later.

[The Dark Side of Will]

You mean for your gauge sender?

Finding a place to install a fan switch sounds like extra effort for something that should receive zero effort.

[Shaun41178(2)]

I guess I would need the sensor and the pigtail part numbers to do the 3 wire mod

[The Dark Side of Will]

You didn't say what kind of aftermarket gauge you have, so it could be something that's not compatible with GM senders... you haven't given us the info to work with there.

There's zero need to keep a fan switch, though.

And yeah, if it will work with your gauge, the unit and pigtail will be all you need.

[Shaun41178(2)]

Oh. I guess I misread. I thought the 3 wire sensor was for the signal to the ecm and to the radiator fan(fan switch) since the fan switch is a one wire.

I am using an autometer temp gauge with a single wire sender to the gauge

[The Dark Side of Will]

The ECM controls the fan relay. Do not use a fan switch.

The 3 wire sensor has the ECM's 2 wire sensor and a 1 wire sender for the gauge built into the same unit.

Autometer usually uses GM type senders; there are a LOT of AutoMeter gauges... what model do you have?

[pmbrunelle]

The ECM controls the fan relay. Do not use a fan switch.

Sure about that?

Hopefully this 3900 sensor is compatible with the fiero ecm.

Seems like Shaun wants to use a Fiero ECM... this hypothesis is consistent with the distributor we saw on the previous page.

I'm guessing that a Fiero ECM can't operate the radiator fan, hence why Fieros have separate fan switches from the factory.

[The Dark Side of Will]

Oh yeah, Feh...

I forgot Shaun does shit like run a 2006 engine on a 1986 ECU. Are you sure the V8 guys are the knuckle draggers, Shaun? Maybe we need to schedule an intervention for your distributor addiction.

Dude, What.The.FUCK.Is.That?

[ericjon262]

Oh yeah, Feh...

I forgot Shaun does shit like run a 2006 engine on a 1986 ECU. Are you sure the V8 guys are the knuckle draggers, Shaun? Maybe we need to schedule an intervention for your distributor addiction.

Dude, What.The.FUCK.Is.That?

Lol! I almost died!

but seriously? why go through all the trouble to keep the stock ECU and distributor? the only advantage is that there may be ever so slightly less wiring to do it, but here's plenty of documented setups that work better, and are probably easier to tune or have tuned.