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Topic Review (Newest First)
09-07-2018 08:17 AM
Jfrost
Quote:
Originally Posted by Trinten View Post
Hey JFrost,

Thanks! I will once it's successful. Which I really hope it will be after all the cash going into it. lol So if you're on some of the other Fiero boards (guessing by your signature), keep an eye out there. As we go I'll take a lot of pics and notes, and we'll do a mega-series of posts detailing things.

I hope it'll be ready sometime in the spring.

Related note. Meziere called me today, they finished the technical drawing and send it to me to review, so I got it to Dave to review.
Iím on PFF often but donít post much, Iíll keep an eye out there.
09-06-2018 05:40 PM
Trinten Thanks Mr. Roboto!

Yes, I got the ATSG books, and though the tables for the gears are laid out differently between the 4T80 and 4L80, they seem to match up.

HP Tuners also has some code for the 4L80E, so that's the same idea.
09-06-2018 07:46 AM
Mr_Roboto
Quote:
Originally Posted by Trinten View Post
So I got a great update!

The recommendation was pretty solid. They suggested I get the ATSG manuals for the 4L60 and 4L80, and see which one has the closest solenoid pin-outs to the 4T80. Change the wires and then upload the tables for 4L## I lifted the pin-outs from. This will let me use my 0411 PCM to manage the transmission as well as the engine!

Also split the engine and my manual transmission today, and pulled my flywheel. Going to send it off to Meziere (hopefully tomorrow) so they can take the measurements they need and crank out my flex plate!

Thanks guys for helping me out with the ideas and pointers to the right resources.
Megasquirt Support Forum (MSEXTRA) • MShift on Microsquirt (View topic)

This is for the Megashift/Microsquirt control of the trans, but the last post is what's interesting. Based on what they're saying you'd probably want to segment swap with 4L80E code then adjust the pressure from there. Swapping in the later force motor (with a different frequency) to the early 4L80Es is a common enough upgrade if memory serves correctly so it's probably something I'd see if it fit in your trans.

The ATSG books tend to be a good resource and worth having.
09-05-2018 07:11 PM
Trinten Hey JFrost,

Thanks! I will once it's successful. Which I really hope it will be after all the cash going into it. lol So if you're on some of the other Fiero boards (guessing by your signature), keep an eye out there. As we go I'll take a lot of pics and notes, and we'll do a mega-series of posts detailing things.

I hope it'll be ready sometime in the spring.

Related note. Meziere called me today, they finished the technical drawing and send it to me to review, so I got it to Dave to review.
09-05-2018 08:38 AM
Jfrost Be sure to post pics, sounds like an awesome build.
08-19-2018 09:38 PM
Trinten So I got a great update!

The recommendation was pretty solid. They suggested I get the ATSG manuals for the 4L60 and 4L80, and see which one has the closest solenoid pin-outs to the 4T80. Change the wires and then upload the tables for 4L## I lifted the pin-outs from. This will let me use my 0411 PCM to manage the transmission as well as the engine!

Also split the engine and my manual transmission today, and pulled my flywheel. Going to send it off to Meziere (hopefully tomorrow) so they can take the measurements they need and crank out my flex plate!

Thanks guys for helping me out with the ideas and pointers to the right resources.
08-18-2018 07:30 AM
Trinten Yes, that's it exactly. I've had the 0411 managing the engine (and feeding the instruments/idiot lights) for about 4 years.

What you are asking is exactly what I'm wondering about, and trying to find someone who has that chunk of code. I know there are guys here that run the 4T80E, but not sure how many have HP Tuners. I was hoping someone could email me the file or point me to where I could find it.

I tried google, but have only found leads on making this PCM work with a Northstar engine, and still no code yet, just feasibility discussions.
08-18-2018 02:56 AM
Mr_Roboto A point/question I am likely to make is are you running the 0411 for EFI? If so have you seen if you can segment swap in the 4T80E code? It may drop in, not entirely sure.
08-18-2018 12:32 AM
Trinten Thanks for the pointer, Mr. Roboto!
I skimmed through it, and found a forum run by those guys and posted up some questions over there about getting a file for my transmission to use on my PCM.
08-17-2018 09:15 PM
Mr_Roboto
Quote:
Originally Posted by Trinten View Post
So I have some good news! Meziere will make the flexplate for me! They make billet SBC and billet 3800 flexplates (so they are familiar with the right bolt pattern and tooth count).

They want me to send them my flywheel so they can make sure they get everything spot on. And the cost of having them design it was very reasonable!

So I had another question around this, I'm running the 0411 PCM, and was originally going to buy a stand alone transmission controller, but someone told me that I could setup the 0411 to control this transmission, but I would need a baseline of the transmission parameters from a car that came equipped with this transmission.

I'm using HP Tuners. Does this sound right/possible? It would save me about a thousand bucks if it's possible.
https://sites.google.com/site/sloppy...ans-controller

Usually Denmah seems pretty spot on.
08-17-2018 06:36 PM
Trinten So I have some good news! Meziere will make the flexplate for me! They make billet SBC and billet 3800 flexplates (so they are familiar with the right bolt pattern and tooth count).

They want me to send them my flywheel so they can make sure they get everything spot on. And the cost of having them design it was very reasonable!

So I had another question around this, I'm running the 0411 PCM, and was originally going to buy a stand alone transmission controller, but someone told me that I could setup the 0411 to control this transmission, but I would need a baseline of the transmission parameters from a car that came equipped with this transmission.

I'm using HP Tuners. Does this sound right/possible? It would save me about a thousand bucks if it's possible.
08-08-2018 06:30 PM
Trinten Thanks! I'm staying down by Tinley Park, I'll try to roll up that way if time allows!
08-08-2018 05:42 PM
Thirdgen89GTA
Quote:
Originally Posted by Trinten View Post
Thanks Yaj Yak. I dropped in the general GM section as this was an odd combination. Hopefully one of the guys you mentioned sill spot this and share their thoughts.

I am in Chicago for about a week, are there any regular meets or anything going on between now and next Tuesday morning?


Yes there are. C&C on Sunday mornings.
http://www.thechicagogarage.com/foru...ee-2018-a.html
08-08-2018 09:32 AM
Trinten Hey Rich,

That might be the final solution, I'll see what TCI says (hopefully they email me back).
To Triple Edge's credit, I found out today that Dave took the time to call V8 Archie (the company I originally got my engine/trans adapter plate from years ago) and they said they might have a solution, so I've reached out to them, too.

I'm super impressed at Dave's customer service with this project - and I really appreciate the responsiveness and ideas you guys have been giving me, too.
08-08-2018 09:24 AM
RICH17 Who makes the aluminum flexplate? can you try to buy one not drilled and get the correct patterned drilled into it?
08-08-2018 09:12 AM
Trinten Yes, they are building the transmission for me (great guys to talk with). He had the same concern, he wasn't sure where I could get a flexplate for this setup. He recommended someone to me, and I reached out, but no joy yet.
08-08-2018 08:29 AM
Yaj Yak you talked to triple edge or no?
08-08-2018 08:26 AM
Trinten Hey Rich,

Thanks, yes! I have been part of the Fiero community for a number of years. The trick here is that none of them have used the 4T80. The most common is the 4T65. So I'm in some uncharted territory right now.

I might buy the stock 4T80 flex plate, just so I have something to check clearances around the SBC block. I've emailed TCI and asked them if they'd be able to make me a flexplate with the right pattern for the SBC, telling them it'll likely have a 1" adapter plate between the trans bellhousing and engine (my F23 manual has the same bolt pattern as the 4T80, and I figured I can reuse the same adapter plate).

Fingers crossed.
08-08-2018 08:13 AM
RICH17 I know Fiero guys have done SBC's before so they might be the ones to ask
08-07-2018 10:40 PM
Trinten Oh, I did learn tonight that my current flywheel has a 142 tooth ring gear, which is the same tooth count as the the 4T60, 4T65 & 4T80 transmissions.

My engine is internally balanced. So is it possible to get a flexplate from a 3800 (or northstar GM that had the 4T80), and have it drilled/balanced to bolt up to the SBC?

I think at that point the biggest concern is the thickness of the flexplate, to compensate for any adapter plate? Or can I use spacers to move the flex plate the right distance from the engine? (or, as seen at about 8:30 into this video, he says they can use washers to connect the flex plate to the torque converter if there is too much gap - https://www.youtube.com/watch?v=lrqANOa_k3w ).

And of course I need to make sure the diameter of the flex plate clears the block and the bellhousing, though I think if I'm using a flexplate that goes with that transmission, that shouldn't be a concern?
08-07-2018 10:13 PM
Trinten Thanks Yaj Yak. I dropped in the general GM section as this was an odd combination. Hopefully one of the guys you mentioned sill spot this and share their thoughts.

I am in Chicago for about a week, are there any regular meets or anything going on between now and next Tuesday morning?
08-07-2018 09:16 PM
Yaj Yak might get more action on this in the 3800 section

also we need james i think
@Turbocharged400sbc

the snowmobile twin engine guy would help too where he at
08-07-2018 07:28 PM
Trinten Hi Rich,

Yes, mid-engine setup. This is in my Fiero.
08-07-2018 02:10 PM
RICH17 Rear engine setup or? I bet wonder if a 4L60 flexplate would work from say a V6 Camaro
08-07-2018 08:17 AM
Trinten
SBC w/ 4T80 transmission - flex plate?

Hi All,

I signed up here after finding an epic thread discussing the 4T65E and the 4T80E.

I currently have a F23 manual mated to my SBC (running a 0411 pcm), there is a 1" adapter plate to allow this. I have the car apart for upgrades, and want to switch to an automatic, namely the 4T80E.

I found a source for the transmission, controller, and torque converter, but I am not sure about the flexplate.

The transmission guys I talked to said the adapter plate would influence the flexplate, and I've had my current setup for so long I don't remember what size the flywheel is or the toothcount (I reached out to the guy who last did some major work on my car to see if he remembers - I figured this info would be useful).

It'll be a rear-wheel setup. I want to make sure I can solve for the flexplate before I spend all the money on the other components, (or face selling them at a loss). Even if there's information I can't get until I have the transmission, as long as I know there is a person/shop that can make the flexplate once I have that info, I'll start buying the components.

Any thoughts/suggestions?

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