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1984 Trans Am build thread - turbo LQ4 & 4L80E

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Old 03-27-2017, 07:14 AM   #51  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Great build! I am about quite a bit further behind you in my build but love to see your progress.

Any concerns about the body filler over the strut towers? I did the same thing but with a bit less, and even with less filler some members on here told me it would crack if I drove my car hard. Just seeing if you had any similar concerns.

Also can you post more pics of the door handles? I love the way they turned out but not sure I get what the finished product will look like.
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Old 03-27-2017, 08:49 AM   #52  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

thanks dennisbernal91z.
the strut towers were welded and then the welds were smoothed out. after that they received a light coat of filler. i'm hoping it won't crack, but i suppose it's still a possibility. the car will have subframe connectors and a front wonderbar. i'd like to figure out some kind of brace similar to the g-brace available for second gens, but i don't know if they'll fit with my turbo setup. that would really stiffen up the front of the car. below is a picture of the second gen g-brace. maybe the front of the brace can attach to the front of the frame rail.
i'll try to take more pictures of the handles. the car is an hour away at my friend's shop, but i'm hoping to do some more work on it this weekend.


Last edited by battmann; 01-14-2018 at 08:57 AM.
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Old 03-27-2017, 02:19 PM   #53  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Nice. Totally understand. I didn't weld my towers at all, just did filler.

I will be wire wheeling it all off, welding, and we filling....Ugh...

As for bracing. I am in a similar boat. SFC, 4 point bar, wonder bar and STB. I hope to make my own that ties to the nose as well as back to the firewall. I plan to run a procharger on an LS motor.

I agree the g-brace type of support seems like a great inspiration for a stiffer nose.
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Old 03-28-2017, 10:26 AM   #54  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

If you want, look at the new Hooker Blackheart system. You'll have to swap to their motor mounts, but they have a cross member that will fit the 4L80e.

Hooker Transmission Cross member
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Old 04-03-2017, 07:22 PM   #55  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

this past weekend i mocked-up the CXRacing LS turbo kit for third-gens that i bought. i needed to make all the holes in the engine bay before having the shop finish painting the car. the kit is very nice and fit well. i believe worth it was well worth the cost. i started a separate thread on the install to show how we did things. the kit is designed for a thirdgen camaro so a couple things needed to get modified during the install. here's a link to that thread:
https://www.thirdgen.org/forums/powe...ml#post6124863

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we also completed a few other things:
finished installing the BMR trak pak torque arm relocation kit. the front of the torque arm mounts to a bar that we welded to the subframe connectors. between the subframe connectors and this i think we really stiffened up the car a lot.

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i got UMI tubular a-arms cheap off another member here and installed Eibach lowering springs, but the springs kept coming out of the a-arm because there's no bottom pocket for them to sit in. to fix the issue, we welded in a small piece of tube to act as a retainer so this won't happen anymore. i'm not sure if the ones i got where some kind old design or something. they should be good now (i hope).

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we fabricated our own 4L80E crossmember awhile ago, but it was kind of bulky. i ended up getting a used PA Racing 4L80E crossmember off the classifieds here. i wasn't sure if it would fit since PA's website says the crossmember is for 85-92 thirdgens, but it fit fine.

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i also swapped out my Spohn LS motor mounts with UMI mounts. the Spohn mounts don't work for our cars. there was hardly any room between the f-body oil pan and crossmember. also the engine sat 3/8" or more low on the passenger side. when i called to complain, they tried to tell me it was because i used UMI's solid motor side mounts (which wouldn't make a difference). they wouldn't do anything for me. there's threads on here with others who have had the same issue - should've done more research. some people got the engine to sit level, but it just wasn't working for me. oh well. with the UMI mounts in here, there's a finger's worth of room between the oil pan and k-member everywhere.

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after doing all this we pulled the drivetrain and are sending the car back to the paint shop. they need to paint the engine bay and i should have the car back in 2-3 weeks.
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Old 01-14-2018, 09:44 AM   #56  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

i haven't updated this thread since April 2017 because i thought all the photobucket links were broken. i don't remember if i fixed them or what, but i can see all the pics - hopefully you can too.
i've made some progress since that time. biggest thing to report is most of the car was in paint last May. only a few parts weren't done: fenders, hood, front and rear spoilers. the engine bay is painted the same color as the car, but in an eggshell sheen.







June or July we got the car back to my friend's shop so we could install the engine, transmission, fuel tank and run some brake lines. i went with a dual pump Squash Performance unit for the tank. it's a nice (but expensive) piece. the brake lines were a stainless steel kit from Inline Tube. it's a little tricky to work out the bends in the front to back line, but everything fits great. i had the paint shop paint the Moser rear end. he took the liberty to paint the third member in silver which i thought looked pretty cool.







we wanted to install the exhaust too, but ran into an issue. i went with the Magnaflow 16829 kit. when mocking up the piping, it looked like the BMR trak pak front torque mount may interfere with the driveshaft location. unfortunately i need to order a custom driveshaft so we couldn't check this. we decided that i should get the driveshaft first because if the trak pak needs to get moved, that could affect the exhaust routing.

Last edited by battmann; 01-14-2018 at 10:04 AM.
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Old 01-14-2018, 09:54 AM   #57  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

at the end of August we finally brought the car back to my house. i thought i'd get a lot of work done with the car being in my garage, but i haven't had a ton of extra time. plus when i have had time to do things, i can't seem to get much done because i either need a part or have to do something first before i can actually do what i had planned.
for example: i wanted to send out the headers and turbo piping to get ceramic coated, but i happened to learn from a reply in my turbo thread here that the crossover pipe was too close to the water pump tensioner. i mocked up the front accessories to check and sure enough, there was only maybe 1/4" of clearance between the belt and crossover pipe. i called CXRacing and turns out their earlier design had this issue, but in their newer design this is fixed. i had to send my passenger header and crossover back to them so they could fix it - free of charge. great customer service by the way. this whole process wasted about a month of time.
i did manage to get the fourth-gen fuel neck installed. i ended up making a spacer so i could use the mounting flange that is already on the neck. the stock fourth-gen rubber tube also works, but needs to be cut down a little. i think maybe 1-3/4" if memory serves me correct. check that before you cut just to make sure.





the hood got finished a couple months ago and it turned out great. i also just picked up the finished fenders. i won't be installing these items until i'm done in the engine bay. unfortunately i didn't take any pics of these pieces yet.
last Thursday it was almost 60 degrees so i went in the garage to take all the measurements for my custom driveshaft. i'll be ordering from Denny's Driveshaft and hope to do that this week.
now you're all caught up!

Last edited by battmann; 01-14-2018 at 10:01 AM.
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Old 01-14-2018, 04:51 PM   #58  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

What did you undercoat your car with?

engine bay looks amazing.
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Old 01-14-2018, 05:56 PM   #59  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Very nice work…love early third gens
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Old 01-14-2018, 08:47 PM   #60  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Quote:
Originally Posted by dennisbernal91z View Post
What did you undercoat your car with?

engine bay looks amazing.
I used Iron Armor truck bed coating. They sell it at Harbor Freight. Don’t laugh - it’s a good product.
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Old 01-16-2018, 02:18 PM   #61  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Right on. I buy HF stuff all the time. Just because something is low cost doesn't mean it is bad.

Do you have more info on your door handles?

Also what did you paint your K-member with?
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Old 04-16-2018, 12:43 PM   #62  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Any other comments about the PA Racing cross member? Just found out it existed a few days ago.
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