Bought a c4 vette. Need some advice on this swap.
04-09-2010, 07:43 PM
#1
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Bought a c4 vette. Need some advice on this swap. I just bought a c4 corvette targa top with a new 4 speed automatic. Car has been almost completely restored years ago. Including new paint, dash and digital gauges. They had a family friend who "knew what he was doing" rebuild the LT1 and install it. He put in a piston ring backwards, and scratched up the crank as well. So i got the car with everything but the motor...
This saves me money on my swap, as i wont need to go out and buy a bunch of crap.
Its in awesome condition. Ive never owned car. It has been in my friends shop with the cover on it for for years. His uncle owned it and is clearing out stuff. Sold it to me because he wanted to see it run again.
Shes dirty REAL dirty, so give me a break lol Hasent been washed in 8 years
The fun part:
My LQ9 will bolt right in. So over 400hp in this thing should be INSANELY FUN. I'm upset about not doing it to the truck.
I paid 800 for this car. I will get pictures when we trailer it home tomorrow.
Anyone know what the 4 speed auto was in this year corvette? Its a 85 frame with a 93 carbon fiber body. Automatic.
So i need to know if this LT1 tranny can be made to work with the LQ9. If so what do i need to do?
I know i will need an F body oil pan, and some F body accessories.
This saves me money on my swap, as i wont need to go out and buy a bunch of crap.
Its in awesome condition. Ive never owned car. It has been in my friends shop with the cover on it for for years. His uncle owned it and is clearing out stuff. Sold it to me because he wanted to see it run again.
Shes dirty REAL dirty, so give me a break lol Hasent been washed in 8 years
The fun part:
My LQ9 will bolt right in. So over 400hp in this thing should be INSANELY FUN. I'm upset about not doing it to the truck.
I paid 800 for this car. I will get pictures when we trailer it home tomorrow.
Anyone know what the 4 speed auto was in this year corvette? Its a 85 frame with a 93 carbon fiber body. Automatic.
So i need to know if this LT1 tranny can be made to work with the LQ9. If so what do i need to do?
I know i will need an F body oil pan, and some F body accessories.
Last edited by Palomba; 04-11-2010 at 09:49 PM.
04-09-2010, 08:25 PM
#2
Depending on the year LT1, its either a 4L60 or 4L60E. Both can be mated to the LSx with the crank flange adapter and stock flexplate. Iron headed 6.0Ls already have the longer crank flange, so no adapter is necessary
4L60's are updated 700R4s and still rely on the TV cable. Use an adapter kit to put the proper stud on the throttle cam along with a longer TV cable. Flash a manual trans tune into the PCM and use a BTO vacuum lockup control switch
4L60E's come in two flavors behind the LT1s. PWM and non PWM. Pull the TC and check for the casting, it will be obvious. PWM 4L60Es are wired in just like a LSx car/truck would. Non-PWM trannys are one wire short and the PCM wont like it very much
Easiest method is to sell whatever trans is currently in there and get either a Fbody or truck LSx 4L60E. Saves all of the hassles listed above
4L60's are updated 700R4s and still rely on the TV cable. Use an adapter kit to put the proper stud on the throttle cam along with a longer TV cable. Flash a manual trans tune into the PCM and use a BTO vacuum lockup control switch
4L60E's come in two flavors behind the LT1s. PWM and non PWM. Pull the TC and check for the casting, it will be obvious. PWM 4L60Es are wired in just like a LSx car/truck would. Non-PWM trannys are one wire short and the PCM wont like it very much
Easiest method is to sell whatever trans is currently in there and get either a Fbody or truck LSx 4L60E. Saves all of the hassles listed above
04-09-2010, 10:18 PM
#3
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I was hoping it was a 700r4. All the wiring and all is in place in this thing. So i mean really i just need to bolt in an LT1 and plug in all the sensors and it would be on the road. But i want to go with the LQ9. Someone told me they make LT1 to LSx mounts. and i got a Edelbrock performer rpm intake manifold for the LQ9 on order. This puts me in a better platform for the swap, im going to just keep the truck for day to day transportation. So i can remove most of the engine bay wiring to clean things up. New dash is in there and interior is flawless. Transmission i got with it is newly rebuilt never been ran more than 100 miles.
The plan was to mount it in, if i could get the tranny to work with it fairly simple enough all i would need then is the right carburetor and a fuel pump then i would be on the road. The cables and everything are there for the throttle and transmission. I will need an F body oil pan for my LQ9 and i dont think the truck accessories will fit so i will need new accessories too.
The plan was to mount it in, if i could get the tranny to work with it fairly simple enough all i would need then is the right carburetor and a fuel pump then i would be on the road. The cables and everything are there for the throttle and transmission. I will need an F body oil pan for my LQ9 and i dont think the truck accessories will fit so i will need new accessories too.
04-09-2010, 11:39 PM
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So is it a 700r4? In that case i would only need a spacer correct? I have a 2003LQ9 with the 317 heads.
http://www.vetteworksonline.com/cata...roducts_id=218
im going to use thees, so engine mounting is solved. As far as engine management goes. Nothing will be needed because i will be carburated with MSD 6010 box. So my engine will be stand alone pretty much
I need to swap out a fuel pump for a carburetor friendly one. Probably a Holley Blue and a decent regulator.
I want to get the LT1 transmission to work with this LQ9. This is where i have questions.
http://www.vetteworksonline.com/cata...roducts_id=218
im going to use thees, so engine mounting is solved. As far as engine management goes. Nothing will be needed because i will be carburated with MSD 6010 box. So my engine will be stand alone pretty much
I need to swap out a fuel pump for a carburetor friendly one. Probably a Holley Blue and a decent regulator.
I want to get the LT1 transmission to work with this LQ9. This is where i have questions.
Last edited by Palomba; 04-10-2010 at 12:09 AM.
04-11-2010, 09:36 PM
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I believe its TV cable. Has a cable attached that would lead to the carb/throttle body. Then the lever for the cable running from the shifter in the car to change the gears and put it in park and what not.
The trasnmission does have a 4prong connector on it for something though. What is this for? And do i need it?
has the 700r4 pan pattern.
The trasnmission does have a 4prong connector on it for something though. What is this for? And do i need it?
has the 700r4 pan pattern.
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04-12-2010, 09:43 AM
#8
I didnt see the pics before. Thats definitely a 4L60(700R4). You can clearly see the TV cable
4 pin connector on the drivers side of the case is for lockup control. Your vacuum kit will either come with a new connector there or you will splice onto the original connector
Youll have no problem installing that behind the LSx with the flange adapter and stock LT1 flexplate. It wont like all the torque from the 6.0L though
Any reason you're going carbed instead of EFI? Any sort of carbed swap wont fit under the hood
4 pin connector on the drivers side of the case is for lockup control. Your vacuum kit will either come with a new connector there or you will splice onto the original connector
Youll have no problem installing that behind the LSx with the flange adapter and stock LT1 flexplate. It wont like all the torque from the 6.0L though
Any reason you're going carbed instead of EFI? Any sort of carbed swap wont fit under the hood
04-12-2010, 10:11 AM
#9
$800.00 project car [QUOTE=
I paid 800 for this car. I will get pictures when we trailer it home tomorrow.
[/QUOTE]
You SUCK !!! LOL
I paid 800 for this car. I will get pictures when we trailer it home tomorrow.
[/QUOTE]
You SUCK !!! LOL
04-12-2010, 10:14 AM
#10
04-12-2010, 02:15 PM
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couple things here not making sense, says 1985 car (interior looks right for that year). Then you say rebuilt the LT1? Was this a transplant already? 85's came with L98 and a regular 700R4, not LT1/4L60. No your LQ9 will not bolt right in 
Will fit nicely tho but not just slap it in there 
Will fit nicely tho but not just slap it in there
04-12-2010, 04:06 PM
#12
Early LT1s got the 4L60. The 4L60E wasnt standard until 94
The engine wont bolt in directly (thats what the plates he linked to are for) but the trans will. The crank flange adapter is a receiver for the converter nub to keep the trans lined up. All bases look to be covered so far, short of the hood
The engine wont bolt in directly (thats what the plates he linked to are for) but the trans will. The crank flange adapter is a receiver for the converter nub to keep the trans lined up. All bases look to be covered so far, short of the hood
04-12-2010, 08:46 PM
#13
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Yeah spoke with a guy from vetteworks. He says if it had an LT1 in it i just need c5 mounts. That they bolt in place and i wont need the conversion mounts. Is this true?
Yeah the car is the 85. But had a 93?? conversion. Im not sure what all changed. I think just the motor. but to be honest im not 100 percent sure.
The vin pulls a 1985 5.7L coup. But this one is a targa top. So i think he swapped some stuff out at one point. He said something about a 93 conversion?
Yeah the car is the 85. But had a 93?? conversion. Im not sure what all changed. I think just the motor. but to be honest im not 100 percent sure.
The vin pulls a 1985 5.7L coup. But this one is a targa top. So i think he swapped some stuff out at one point. He said something about a 93 conversion?
Last edited by Palomba; 04-12-2010 at 09:39 PM.
04-12-2010, 10:12 PM
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It will only show up as a coupe, unless it's a vert they all had the targa top. Newer front and rear clips bolt on pretty easy and are fiberglass or the urethane bumpers. Highly doubt carbon fiber anything. Mine would have been done a long time ago just don't have much time to work on it, as stated they are not a bolt in so don't believe that. Not saying it all that tuff tho. Does it have the regular looking sbc mounts welded to the frame? I'd bet so, then it was still a L98.
04-12-2010, 10:39 PM
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I will have to look in the morning. I know the motor was a LT1, Its in pieces on a table at the shop lol
As far as getting all the electrical and fuel pump to work and what not. If i leave the factory computer in place. And everything hooked up except for things like injectors, the 02 sensor, and all the engine stuff and obvius stuff i wont need. But hook up all grounds and power to the alt and such. Will the cars electrical system be ok? And will the trans still function corectly? I think the only thing electrical on the trans is the signal it recives from the break for locking up the converter.
The engine im not worried about getting running. Just want the fuel pump to function properly, and the tq converter. As well as the heater, radio, windows/locks, and lights. I think the factory guages would even still work am i right?
As far as getting all the electrical and fuel pump to work and what not. If i leave the factory computer in place. And everything hooked up except for things like injectors, the 02 sensor, and all the engine stuff and obvius stuff i wont need. But hook up all grounds and power to the alt and such. Will the cars electrical system be ok? And will the trans still function corectly? I think the only thing electrical on the trans is the signal it recives from the break for locking up the converter.
The engine im not worried about getting running. Just want the fuel pump to function properly, and the tq converter. As well as the heater, radio, windows/locks, and lights. I think the factory guages would even still work am i right?
Last edited by Palomba; 04-13-2010 at 12:13 AM.
04-13-2010, 06:39 PM
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I think your fuel pump is going to work from the ls1 computer signal. Atleast one of my wires on my conversion harness had a fuel pump label on it. I think the stock computer should just runs the suspension if it was adjustable and gauges. You might call speartech they are the experts.
04-15-2010, 07:15 AM
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1985 w/ Carbon fiber - umm CF didn't come one the Corvettes until the 2004 Z06 anniversary package hood. It wasn't used in the fenders until the 2006 Z06....
