90 firebird formula merges with LQ4 ( questions!!! )
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From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: 90 firebird formula merges with LQ4 ( questions!!! )
I think the stock crank will hold up to some boost, 20 psi....I'm not sure about that much, but there's guys running around with close to 1000hp with the stock crank.
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From: Apopka, Florida
Car: 1989 Pontiac Trans Am GTA
Engine: cammed LS1
Transmission: Monster SS 4L65E
Axle/Gears: 9 bolt posi w/ 3.70 gears
Re: 90 firebird formula merges with LQ4 ( questions!!! )
Probably so, but if you are putting all of that money into a new engine, why not buy a new forged crank that will take whatever you throw at it!?! Then you don't have to worry about it. Just my
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
ya i thought the stock crank could handle some good numbers so i was just makin sure. but i got the motor put in for the last time and it looks awesome!!! i cant wait to see a turbo sitting there. i think i may turbo charge the ls1 just to see what i can put down with like 6psi the build the lq4 and then see what i can put down with like 14psi but ya more updates to come ill get pics tommorow so be expecting it
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
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Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
so i realized the head gaskets i got were knock offs, and they DO NOT WORK! the metal tab that holds the gasket material together is hitting the deck surface, so i am gonna either go with 243's or 317's so idk yet kinda tryin to figure that out. the reason i am gonna switch heads is cause a header bolt is broke off in the head. ( i am lazy and do not feel like paying to have it takin care of)
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Car: 98 Camaro Z28
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
So got some good news and bad news. bad news,...... i bent a arp head bolt,...... which makes me upset but not really. ill explain, i plaing on later down the road turbo charing the car so arp head studs are in order so i might as well go with them now. but the good news,.... everything looks great! i tore the motor back out, pulled off the front end andeverything looks good. so i am excited, oil pan clears the k-member with out any mods got bout a finger of clearence. so here are some pics so let me no what you guys think.
Anybody wanna buy a set of arp head bolts for like idk BEST OFFER. will be cheap since one is bent. let me no by pm thanks
chilling.jpg?t=1303348733
camsprocket.jpg?t=1303348732
90fbls1.jpg?t=1303348732
hanging.jpg?t=1303348732
Anybody wanna buy a set of arp head bolts for like idk BEST OFFER. will be cheap since one is bent. let me no by pm thanks
chilling.jpg?t=1303348733
camsprocket.jpg?t=1303348732
90fbls1.jpg?t=1303348732
hanging.jpg?t=1303348732
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From: Cincinnati, Ohio
Car: '89 GTA
Engine: 5.7L LS1
Transmission: 4L60E
Axle/Gears: 9 bolt 3.27
Re: 90 firebird formula merges with LQ4 ( questions!!! )
When you put the motor in for the final time make sure your torque arm mount is bolted to the trans, and that it is properly assembled. Because those gigantic bolts have zero room in the trans tunnel.
I made this mistake when I put my trans in.
I made this mistake when I put my trans in.
Last edited by White'89; Apr 20, 2011 at 08:45 PM.
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
thanks bro i will. i actually was thinking of putting the mount on after but now that you say that i will go with your words of advice thanks bro
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Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
i put a chain in the head bolts holes with the arp headbolts holding the chain in and it bent. to me makes arp sound cheap
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From: Ontario, Canada
Car: 1991 Trans Am GTA
Engine: LSX (swapping)
Transmission: 4L60E (swapping)
Axle/Gears: 2.73 Posi 10 Bolt
Re: 90 firebird formula merges with LQ4 ( questions!!! )
They aren't meant to take stress sideways. Especially with a long headbolt.
Re: 90 firebird formula merges with LQ4 ( questions!!! )

Theres tons of bolt holes that take shorter bolts that arent $200 per set. PM how much you want for the partial set
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
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Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
yea i no it was a bad idea but i figured they would hold if the stock gm ones hold but whatever. i need the studs anyways so! ya, plans have changed once again. gonna put a decent set of heads on the motor. so idk what exactly ill be doing but i no they will be decent
Last edited by stoning_volcom; Apr 22, 2011 at 12:31 AM.
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
so no updates except that i am waiting on money to get my harness back from pocket. HE DOES IT SO FAST! lol its crazy i wasnt expecting it to be done that fast but he got it done just gotta wait on money now
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
well my wife has been to the hospital bout 5 times, and i am tryin to get money together for pocket to get my harness back and get him the money, but other then that looking for headgaskets tranny crossmember and some other odds and ends thanks
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: 90 firebird formula merges with LQ4 ( questions!!! )
if you've got a 6.0, grab yourself a couple of 12610046 gaskets; they're $30 each, hard to beat and they're MLS
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
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From: Illinois
Car: 98 Camaro Z28
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
List of what i need to get the car started.
disable vats
starter
headers
fuel pump
fuel lines
harness
accessories
waterpump
radiator hoses
tranny crossmember
tranny cooling lines
fluids
maf
i think that is all....................
on the vats how would i go about doing that?
disable vats
starter
headers
fuel pump
fuel lines
harness
accessories
waterpump
radiator hoses
tranny crossmember
tranny cooling lines
fluids
maf
i think that is all....................
on the vats how would i go about doing that?
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From: Pepperell, MA
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
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From: Cincinnati, Ohio
Car: '89 GTA
Engine: 5.7L LS1
Transmission: 4L60E
Axle/Gears: 9 bolt 3.27
Re: 90 firebird formula merges with LQ4 ( questions!!! )
I have a MAF which has been for sale in the LSx section for awhile. May also be interested in trading for LSx stuff so let me know what ya got.
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Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
I got my motor all put back together and it is ready to go back in. just gotta bolt everything up and throw it in there.
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
motor is back in!! so the next couple things ill be buying is headers, harness, tranny crossmember, battery, starter, fuel pump, fuel filter, fuel fittings and line, fuel pump and some sensors.
so about 2000 worth and itll be done well at least running.
Im gonna run with the stock 3rd gen tank, a walbro pump, and a vette filter and reg. now a couple questions i have, the vats? where is it located at pocket do you have a pic?? is it a yellow box on the passenger side? CRAP forgot to put tranny dipstick tube in lol oh well
so about 2000 worth and itll be done well at least running.
Im gonna run with the stock 3rd gen tank, a walbro pump, and a vette filter and reg. now a couple questions i have, the vats? where is it located at pocket do you have a pic?? is it a yellow box on the passenger side? CRAP forgot to put tranny dipstick tube in lol oh well
Last edited by stoning_volcom; May 25, 2011 at 04:43 PM.
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Been there, done that. I got it in, but my engine isn't set back.
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Car: 98 Camaro Z28
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
ah ok, well maybe it is on driver side i have no clue thats why i asked?
Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
so, im sitting here thinking, bout my car, and what all i would love to do to it. My first idea is to get it running, and break it all in, then drop a cam, and heads on it. maybe just do bolt ons, like underdrive pulley, intake, maf, injectors, throttle body and all that jazz so that is where i am at as of now.
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From: Cincinnati, Ohio
Car: '89 GTA
Engine: 5.7L LS1
Transmission: 4L60E
Axle/Gears: 9 bolt 3.27
Re: 90 firebird formula merges with LQ4 ( questions!!! )
Like Five7 said the Starter/VATS relay is under the driver side kick panel, and the VATS control box is in the center of the dash behind all the ducting and is only accessible with the dash pulled. The little yellow box you are referring to is the VSS buffer box which will be wired around.
I just pulled my dash harness and removed everything that would be useless beyond this point, including those two boxes.
I just pulled my dash harness and removed everything that would be useless beyond this point, including those two boxes.
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
any body got a pic of it? so i no what i am lookin for
Joined: Sep 2005
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From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: 90 firebird formula merges with LQ4 ( questions!!! )
So you just dropped the engine into the car but now you're selling the engine and transmission?
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
well my wife has been to the hospital alot lately, and we have bills so sometimes you have to sacrifice things to get somewhere so idk as of yet. i had to check clearences for brakes lines, and for the tranny crossmember and everything. cause i might build my own.
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From: Cincinnati, Ohio
Car: '89 GTA
Engine: 5.7L LS1
Transmission: 4L60E
Axle/Gears: 9 bolt 3.27
Re: 90 firebird formula merges with LQ4 ( questions!!! )
well my wife has been to the hospital alot lately, and we have bills so sometimes you have to sacrifice things to get somewhere so idk as of yet. i had to check clearences for brakes lines, and for the tranny crossmember and everything. cause i might build my own.
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
so i was working on putting the front end back on tonight. gonna put the hood on and all that jazz, but last time i put it on it was way outta wack so hopefully i can adjust it this time. but all i really need to get for now is headers, harness, knock sensors, cam sensor, oil pressure sensor, tranny crossmember, and ill be satisfied for now at least. my main concern is gettin the harness back from pocket, and getting him paid up
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From: Pacific NW
Car: 99 Tahoe, 98 Buick, 84 Camaro
Engine: 350, 2800, none at the moment
Re: 90 firebird formula merges with LQ4 ( questions!!! )
Hello, I am putting together a list of the LS and LT swaps here on TGO so that others can find answers to their questions a bit easier. This is a great swap thread, it should be on the list. If you will let me add this, please paste it in a reply at this thread: https://www.thirdgen.org/forums/ltx-...ltx-swaps.html and I'll add it to the main list.
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Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
ya you can add it that is fine, I got the seatbelts in today and am gettin ready to get the fuel tank outta the 89 so wish me luck
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From: Pacific NW
Car: 99 Tahoe, 98 Buick, 84 Camaro
Engine: 350, 2800, none at the moment
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
ill post some pics up of what i got done yesterday, i got the 89's rear end out and the fuel tank woot woot! so now i gotta get my fuel lines and fittings then the walbro 255 and ill be set. got a new tpi 350 fuel pump for sale for 25 bucks not including shipping
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 90 firebird formula merges with LQ4 ( questions!!! )
Hey shoot me a txt sometime !
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Car: 98 Camaro Z28
Engine: 346 LS1
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
hey dude man i lost ur number cause janese and i got new phones and a new plan and i broke my previous phone and i forgot how to get ahold of you so send me a pm but ya,...... we will have to hang out sometime. i dont got much left for this car to be done!
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
FINALLY! got the parts car stripped today, started assembling the rest of the car. need windshield wiper setup, but started gettin eveything settled and here are some pics




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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Thread Starter
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
well im kinda stuck,....... i got almost all the interior put in put i was tinkering around and notice that if you have the cable coninected to the shifter that goes to the steering column, connected it will not budge take that one off and it now moves,...... why is that? could it be a faulty cable? could it be a faulty switch not allowing any movement? idk let me no your ideas

Joined: Sep 1999
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From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: 90 firebird formula merges with LQ4 ( questions!!! )
well im kinda stuck,....... i got almost all the interior put in put i was tinkering around and notice that if you have the cable coninected to the shifter that goes to the steering column, connected it will not budge take that one off and it now moves,...... why is that? could it be a faulty cable? could it be a faulty switch not allowing any movement? idk let me no your ideas



Thread Starter
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: 90 firebird formula merges with LQ4 ( questions!!! )
I seem to remember you disconnected the ignition switch? Could be another thread I am thinking of
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
when i turn the key, it seems dead. to be honest no springback action at all just forward, makes no movement at all. so maybe the switch is where i messed up,......................
Joined: Sep 1999
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From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: 90 firebird formula merges with LQ4 ( questions!!! )
I am not real familiar with them as I am always just removing them to discard. I converted both my F-bodies to manual transmission and the other columns I have ever gotten I throw that cable away since I only drive manual transmission.
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Car: 98 Camaro Z28
Engine: 346 LS1
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Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
You did remove/move the ignition switch? Did you put the rod back into the hole on the side properly? I think the cable is something that cant be messed up?
I am not real familiar with them as I am always just removing them to discard. I converted both my F-bodies to manual transmission and the other columns I have ever gotten I throw that cable away since I only drive manual transmission.
I am not real familiar with them as I am always just removing them to discard. I converted both my F-bodies to manual transmission and the other columns I have ever gotten I throw that cable away since I only drive manual transmission.
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: 90 firebird formula merges with LQ4 ( questions!!! )
If you have a manual transmission that cable is not necessary, but the ignition switch is the same for manual and auto and came in a LOT of GM vehicles. Same switch in my 71 and 73 Camaro's
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Car: 98 Camaro Z28
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Re: 90 firebird formula merges with LQ4 ( questions!!! )
Thread Starter
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From: Illinois
Car: 98 Camaro Z28
Engine: 346 LS1
Transmission: T56
Axle/Gears: 3:43
Re: 90 firebird formula merges with LQ4 ( questions!!! )
so i am or have been tryin to make a tranny crossmember today and i got most of is done but got one last peice then ill post a pic










