Mitsubishi Eclipse 3G Club banner

V8 Swap?

112K views 52 replies 32 participants last post by  repforenzo  
#1 ·
Ok I searched and didn't find anything that would truly answer this question, plus I didn't know whether to post this in here or the GT/GTS discussion, but how hard do you think would it be to swap a V8 motor and trans into our cars? Yea i know everyones reaction is going to be "No way you're gonna have to convert it to RWD, not worth the time or money," but what about a transverse V8, like the 5.3's that are in the Monte SS or the SHO motor? Any suggestions or opinions?
 
#3 ·
In almost a decade of being here, I think I can count on one hand people that actually did something way beyond the ordinary with this old, worn-out platform that is the 3G.

Keeping that in mind, I think I have read thousands upon thousands of threads from mostly teenagers that come up with utterly retarded "what-if" ideas only never to do a damn thing about it, other than vehemently defend themselves because of some incredibly stupid concocted reason pulled directly from their ass as to why it could happen.
 
#5 ·
first answer the question, WHY V8?


then answer, WHY 3G?
 
#6 ·
People have taken Grand Am's and Probes and stuff like that and made drag cars out of them for a long time. Mostly because I am sure a beat up grand am is cheaper than a beat up Camaro and they might have had a grand am fall into their lap. It doesn't really matter if it is FWD or RWD because it will end up as an all tube car with a 4 link rear anyway.

If anyone were seriously about doing this I would copy what is done in the drag race world but that is definitly not a street car. I think it has been done before on an Eclipse though right. It has been on the other Eclipse site for years.
 
#7 ·
If you plan on swapping a V8 be prepared for alot of custom fab work, and alot of money like everyone has been telling you. You will have to tear up the interior to actually make it fit and would take ALOT of work to be a street car.

I know of one 2g that was converted to a RWD V8, and if you look at the interior you can basically see the drivetrain running right next to the driver. However I understand you want a FWD but it would still take alot of front end supports and fabbing.
 
#50 ·
If you plan on swapping a V8 be prepared for alot of custom fab work, and alot of money like everyone has been telling you. You will have to tear up the interior to actually make it fit and would take ALOT of work to be a street car
I know of one 2g that was converted to a RWD V8, and if you look at the interior you can basically see the drivetrain running right next to the driver. However I understand you want a FWD but it would still take alot of front end supports and fabbing.
You can bet a v8 with a 4g64 2.1 destroke
 
#10 ·
I will agree dumb question, but it is not (as you put it) "near impossible" to swap a 6G72tt. All it takes is the know how, money, and time to do it. Same three for the V8. All I can say is you may think you can get a 350 and a eclipse for cheap, but I guarantee you will be spending more money than you ever comprehended on the project. Besides by the time you get done doing it, its not a eclipse anymore.
 
#12 · (Edited)
another person from jersey i see. First of all, the 3g doesn't have a trans tunnel so you have to cut and fab a new one from scratch so you can get the trans and make the hole for the shifter. second, you will have to remold or design the interior because of the first. third, the 3g was not ment to carry that kind of wieght around in the front end so you will have to come up with a new suspention setup and add a lot more support in the front end. forth, the car has no tunnel for the drivshaft either so you eill have to make that as well and find out what rear end you will be usind. fifth, you will need to redesign the rear suspention. sixth, you will need to reenforce the whole car so it doesn't twist on you when you want to take off to show off to your friends and street race. so in the end if you really want to drop a v8 in a jap car, your best bet is to go do it with a 240sx or a mazda rx7, because alot of the fab parts are already there such as the area for the trans and drive shaft.

ps, I can't spell for shit today
it is spelled suspension, I know









sorry please be forgiving
 
#17 ·
another person from jersey i see. First of all, the 3g doesn't have a trans tunnel so you have to cut and fab a new one from scratch so you can get the trans and make the hole for the shifter. second, you will have to remold or design the interior because of the first. third, the 3g was not ment to carry that kind of wieght around in the front end so you will have to come up with a new suspention setup and add a lot more support in the front end. forth, the car has no tunnel for the drivshaft either so you eill have to make that as well and find out what rear end you will be usind. fifth, you will need to redesign the rear suspention. sixth, you will need to reenforce the whole car so it doesn't twist on you when you want to take off to show off to your friends and street race. so in the end if you really want to drop a v8 in a jap car, your best bet is to go do it with a 240sx or a mazda rx7, because alot of the fab parts are already there such as the area for the trans and drive shaft.
Exactly what I meant only more indepth.
 
#22 ·
:facepalm: Turning a Geo Metro into a rocketship that will land on the moon is also an "interesting conversion," and I would also be intrigued, but that only says the person who did it has a lot of time and money on their hands. Turning a FWD V6 car into a RWD V8 is a complete waste of time and money unless you have cash flowing out of your pockets, and seriously can't find something better to do
 
#24 · (Edited)
Dummie!




SHO motors are dual overhead cam 3.0 v-6 not v-8's, except the 3rd generation which was an earth shattering 9,000 units. this would make getting an engine nearly impossible to afford ($1500.) Try this link and read: Ford Taurus SHO - Wikipedia, the free encyclopedia

Not bad for a ford hater, Huh?
 
#25 ·
#27 ·
You know for the longest time I was thinking about doing this to my 2002 Eclipse RS. Who cares if it's not an Eclipse anymore, it's really a piece of shit car anyways. At least compared to my 2010 Camaro 2SS. I have a spare 351 Cleveland motor, I have spare suspension parts off of my Camaro to support the front end and rear as long as it can be modified to accept them, and I will have a spare rear cradle from my Camaro as well. All that would be needed to make this work is a transmission, custom axles and driveshaft along with extensive cutting and welding. Who gives a shit if the interior on this car is "intact" and looking great when it's already a piece of shit. The value of many 3G eclipses are less than $2000. It is a UNIBODY that is light and can be strengthened to prevent the chassis from twisting. The curb weight of 3G RS model is roughly 2800 lbs. With the swap you're probably going to add around 500 lbs if that. So you're looking at a 3300 lb V8 rocket. That's just as light as a C7 corvette. Modifications and all would actually cost less than a brand new Corvette. Though the interior won't look "pretty" to all of you "stance" players out there, it will perform well. It has a decent wheel base and correct motor/trans placement would give it nearly perfect weight distribution. Sure it would take a lot of time and guess what the people who have a competitive edge take lots of time to engineer builds. You guys here are just a bunch of lowly parts swappers with only enough time to jack your dick after you mod your little ricer with a turbo.
 
#28 ·
I was just noticing that no one has talked about this in a long time. I both have a question and/or a suggestion. V8 swap is the subject. I'm wondering why there is no mention of anyone taking a 3G Spyder cause of its bigger subframe and basically cutting out everything power train wise out and calling up a company like Roadster Shop with a complete rolling chassis built for a LS swap and suspension. Build a new floor and the hardest part would be making two computers talk. I'm sure back in 09 which was the last post I see it was ?#*+ÂŁÂĄ! But with a welder and fab skills the new tech now, I don't know why this is still an issue. Look up aftermarket rolling frames. With that tech, I don't see a problem with building pretty much anything you can imagine. I'm considering an LS swap in my 03 Spyder. I've done this swap in two other cars that were never meant to be rear wheel drive and it works great. If someone has already used this new tech I'd like to know their results.
 
#30 ·
Because why spend $20,000 on drive train and fabrication for a car that's worth $4,000 when you can buy any one of many other cars that have a ready made kit. By all means, please be the first person. Thing is, anyone with $20,000 spending cash just laying around has it because they're smart enough not to blow it on such foolish things.
 
#32 ·
Tube chassis with Eclipse panels on it. Not really an Eclipse anymore. About as related as a NASCAR Camry and the Camry you buy at the dealer. Probably less related. There's no parts of the Eclipse body made to take the torsional stressed of a big V8 laid longitudinal and you'd be cutting out the forward bulkhead and a good chunk of floor pan to space it back far enough, further weakening the already wet noodle that the Eclipse convertible.
 
#33 ·
There's no parts of the Eclipse body made to take the torsional stressed of a big V8 laid longitudinal and you'd be cutting out the forward bulkhead and a good chunk of floor pan to space it back far enough, further weakening the already wet noodle that the Eclipse convertible.
This. There are a few 2g's that have been RWD V8 set up. They cut out the entire rear of the car and build a new rear subframe (and front subframe) and a cage off it so the car holds together and doesn't bow like a piece of macaroni. These cars are hilariously flexible, especially the spyder.

This type of thing isn't a swap. If you're calling it a swap you have no idea what you're talking about.
 
#36 ·
I've pondered the LS4 (5.3 LS FWD)/F40 (G6 six speed) or F23 (Sunfire/Cavalier/Cobalt 5 speed) before but probably no one has ever even measured it to see if it'd fit. Keep it FWD and the body flex would not be a concern. Weight should be about comparable to a 3.0/auto combo. Custom mounts and axles plus using a 411 or variant PCM as a standalone or building a megasquirt could run it. It'd use the stock 5.3 exhaust manifolds and would require the barest of custom exhaust work. Clutch lines and shifter cables could be a challenge I'm sure.

Seeing what other people have done to some truly unworthy cars, I would like to see it, but it still wouldn't be a fast car. The LS4 came with something like 303hp at the crank and we've already seen what those numbers do in a 3G. Don't get me wrong, it'd be fun to drive and different too, but it'd have to be a really clean install to garnish any respect at all and I'm sure it'd be a massive headache of constantly breaking shit and having the thing up for overhaul once or twice a year.
 
#37 ·
Those LS4 cars are always breaking, and they're built by by a factory and designed by engineers. They're good for nothing but selling transmissions and tires.
 
#38 ·
Yeah that's what I'm thinking. The idea was good IMO, but in the end they should have just stayed RWD in those platforms. Neatest (and only) swap I've seen the LS4 in was a Fiero. It actually makes some sense in that car as long as you're camming and bolting it since it's RWD AND transverse.

In a 3G? Fairly possible IMO but not worth it. And when you think about it, GXPs and Monte Carlos aren't what anyone might call "fast."