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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!

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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

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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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Old 07-28-2018, 02:31 PM   #63  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

sorry Streetstuff - just saw your question. nothing really to add about the PA Racing x-member. it fits good and does it's job. i was going to fabricate something but it was a lot easier to just buy this part.

i've been making a concerted effort to work on this car the past few months though. i REALLY want to get this thing fired up before winter. it won't be 100% finished, but i'd love to at least know the drivetrain is good to go.
a lot of my efforts have been trying to get the CXRacing turbo hot side piping to fit. i sent stuff back twice and ended up just modifying the crossover pipe and upper radiator hard pipe myself. you can see what i did in my engine build thread.
i've also installed a new steering gear and brake booster. trying to figure out how to install the Wilwood master cylinder and proportioning valve. the kit i bought has the prop valve on the driver side of the MC (part number 261-13269-BK at Summit Racing). it won't fit there because of our inner fender well and caster/camber plates. i'll have to fabricate a mount for the prop valve and then rework the brake lines somehow.



also bought wheels: Cray Spider 18x9.5 all around
front tires: Nitto NT05 275/35R18
rear tires: Nitto NT05 285/35R18
brakes: C7 rotors with 2016 Camaro SS brembo calipers all four corners. bought from Scott at www.bigbrakeupgrade.com and have nothing but great things to say about him. he spent a lot of time with me answering questions and helping me build my kit.





ran into one hiccup with the rear brakes. i have a Moser 9" rear with screw-in wheel studs. when i got everything installed, the wheels would only go back and forth like 8". turns out the bolt head of the wheel studs are hitting part of the emergency brake on the new rear backing plates. it's a metal block right behind the spring in the picture below. i ordered a new set of Strange wheel studs with thinner heads so hopefully that will fix the problem. i also ordered a set of 2" thick 5x4.75 adapter plates for the wheels. can't wait to get the car off jackstands so i can move it around.

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Old 07-28-2018, 02:52 PM   #64  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

on to the interior! i don't know if adding heat shield / sound deadener really makes a difference or not, but figured i would install it while the car is stripped. i used a product called Thermo-Tec from Summit Racing. installing this stuff is EXTREMELY time consuming! i did not use a heat gun because i didn't want to melt the stuff. everything was stretched or cut to fit. i'm not sure if i should do the sail panels or sides of the hatch, but those areas are easily accessible even when the interior is back in. i bought four 5'x3' rolls and still have a few decent sized scraps left over. i'll probably end up putting some inside the doors and behind the sail panel speakers.






next i started to install some random parts back on the doors. i bought new interior door handles from Rockauto. there is a small rubber bumper behind the base of the handle. this bumper is super small on the aftermarket handles so i replaced them with the larger factory bumper off the original GM handles. other than that, they seem to be pretty good quality. after that i put some of the door rods back in. i lost the passenger side lock rod so i went to the local junkyard to grab one. when i was removing the rod from the junkyard car i noticed the factory rod bracket was different from the one in my 1984 Trans Am. my bracket only had a spot to mount one rod (first picture below), but the junkyard car's bracket had a spot for both rods (second picture below). i'm guessing later f-bodies had this double bracket?? i'm hoping this new bracket might help reduce some of the door rattles.



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Old 07-28-2018, 03:04 PM   #65  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

one last random update. i wanted to mount the interior heater box to the firewall, but the foam padding was all cracked and looked like junk. i couldn't find a gasket material to replace this padding so i ended up buying a $3 piece of black vinyl wall cove base molding at Home Depot. i created a gasket to slip over the heater hose lines. this looks way better from the engine bays side.








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Old 07-28-2018, 06:27 PM   #66  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Lot of work going in to this car. Going ro be pretty nice.
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Old 07-29-2018, 04:38 PM   #67  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Hey no problem battmann, going to be fabricating my 4l80 cross member in the next couple of weeks. Loving the way the car is turning out. Those wheels look sweet.
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Old 07-29-2018, 10:51 PM   #68  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Thanks for the compliments guys.
I’m debating getting the rims powdercoated gold but am having a hard time finding a gold I love.
Rims do look pretty good in matte black though so still undecided. I’m probably going to paint the calipers to match the car color. Being a Trans Am I don’t want the calipers to say Camaro.
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Old 08-09-2018, 03:42 PM   #69  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

another obstacle overcome!
i installed the new Strange threaded studs on my rear axles and the bolt heads were much thinner than the existing Moser studs. The rear wheels now spin freely without hitting anything!

next i'm planning to paint my brembo calipers. i found a company that will mix paint to match your car as long as you have the manufacturer and paint code:
https://www.g2usa.com/product/CBCP.html

the Camaro SS calipers i purchased were used and full of brake dust. i tried cleaning with a spray can of brake clean and it didn't do too much. i then tried Castrol Super Clean. that stuff worked. i poured some Super Clean on the caliper and used an old toothbrush to clean in all the nooks and crannies. periodically i would rinse the brush and caliper with clean water. you need to do this outside on your lawn or something cause it makes a mess. it took almost an hour to clean up one front caliber, but it worked great. i can now touch any part of the caliper without getting dust on my finger. three more calipers to clean and then i can start painting. i'll let you know how it goes.
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Old 09-18-2018, 09:43 PM   #70  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

i finally had time to paint my calipers with the color matched G2 paint. i bought two cans because their website said one might not be enough with larger calipers. one can was enough to do two full coats on all calipers and then i did a third coat on the surfaces you'll see through the wheel. the black brembo decals were purchased off ebay and were pretty easy to install.







next i solved my Wilwood proportioning valve issue. if you remember, the kit is made for the proportioning valve to fit on the driver side of the master cylinder, but it won't fit like that on our cars. i was able to modify the lines that came in the kit to work on the passenger side of the master cylinder. i used a vice and welding pliers to rotate the lines as needed. the lines must be stainless, because steel lines would definitely have kinked. i still have to fabricate a bracket, but that will be the easy part.



the next problem was the Inline Tube stainless stock replacement brake lines I have wouldn't fit into the Wilwood proportioning valve. the prop valve is made to receive 3/8-24 inverted flair fittings and the brake lines i have are bubble flair. here are the fittings you need to install the lines:
Edelmann 262015 will allow you to connect the rear brake line to the prop valve
Edelmann 262010 will allow you to connect the two front brake lines to the prop valve
i needed to bend the lines to get them hooked up. the stock prop valve has the rear line attached to the front and the Wilwood valve has the rear line in the back. i'll have to clean up the bends around passenger side header and steering column later, but at least i know everything hooks up for now.


Last edited by battmann; 09-18-2018 at 10:26 PM.
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Old 09-18-2018, 10:13 PM   #71  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

next up was the start of the electronics and ECU. this was the part i was dreading about the build. after a lot of research i decided to go with the FiTech Ultimate LS EFI fuel injection system. this system contains all the engine wiring (except the coil packs), ECU, 55lb fuel injectors, intake, fuel rails, 102mm throttle body and some sensors. this setup will also control my 4L80e transmission. before mocking up the intake and wires, i purchased a Motion Raceworks steam vent kit. the kit looks awesome, but was kind of hard to install. it seems like the tubes are too long to fit on the middle distribution block. i ended up making it fit, but i think i may have cross threaded one of the rear coolant blocks. i emailed Motion to see if i can purchase another one, but haven't heard back yet. the kit comes with a tube that connects to the front of the block to hook up a rubber line. i think i'm going to tap the top of the water pump and use AN line though.



after this we spent a few hours temporarily installing the intake and routing all of the wiring. one of my concerns was the O2 sensor. i will be running one O2 sensor in my downpipe. the FiTech kit requires the use of the driver side O2 sensor for the ECU. a second O2 sensor comes in the kit, but is optional. since my downpipe is on the passenger side i was worried that the driver side O2 sensor wiring & connection wouldn't reach to the location i wanted. there was plenty of wiring though so this won't be an issue. i fed the harness through the firewall from the inside. i plan on installing the ECU and fuse block under the dash somewhere. i'll have to get the dash put back in to figure this out. this effort was more for figuring out the engine bay side though. i drilled a 2" diameter hole in the firewall before paint for the engine wiring - it is just to the left and below where the wiper motor should go. the FiTech wire harness didn't come with a grommet so i'll have to find one to fit.



one thing i didn't like about this kit so far is the fuel rails. we took one of the end AN fittings off and tiny metal shards fell out. when we looked inside, there were burrs where the rail was drilled for the fuel injectors. i tried to get a picture of this, but it was really hard to take a clear picture down a fuel rail with a phone. i'm not even sure how to get these out - long screwdriver maybe?? i plan on using Holley rails anyway. The FiTech rails are bored for 6AN line and fittings. the Holley rails i'm looking at let you use 8AN lines and fittings.

lastly, i figured i better check to see if the UMI LS strut tower brace i just bought last month still fits now that i'm using this sheetmetal intake and not the LS6 intake i originally bought. the brace fit! i had the brace on top of the caster/camber plate nuts in the pictures below, but the clearance will still be at a least an inch after installation.


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Old Yesterday, 09:56 AM   #72  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Great update. Must be great to see things starting to come together.

Strange about the burrs. For the price we pay for stuff, that shouldn't happen.

Explain again what the small tubes are under the intake?
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Old Yesterday, 11:02 AM   #73  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Quote:
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Great update. Must be great to see things starting to come together.
Strange about the burrs. For the price we pay for stuff, that shouldn't happen.
Explain again what the small tubes are under the intake?
yes - it definitely feels good making progress. buying parts is easy, but finding time to work on the car has been an issue (especially with the kids back at school now).
the small tubes under the intake are for the LS steam vent ports on the heads. they allow air pockets and pressure to escape the heads from extreme heat. from the factory they are routed to the radiator but i have read about people connecting them to the water pump or radiator hose without issues. some LS engines only had the front ports connected and the rear ports blocked off. here's a more thorough explanation if you're interested:
https://www.motionraceworks.com/blog...team-port-kits
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Old Yesterday, 12:36 PM   #74  
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Re: 1984 Trans Am build thread - turbo LQ4 & 4L80E

Nice car, looking fwd to seeing it come together.
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