Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

LS4 + Classic Mini?

Thread Tools
 
Search this Thread
 
Old 06-11-2012, 03:46 PM
  #1  
Registered User
Thread Starter
 
2tonedc5's Avatar
 
Join Date: Jun 2012
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default LS4 + Classic Mini?

I've been doing some searching and have seen vtec mini swaps, motorcycle mini swaps and V6 mini swaps. I've got the mini and I've got a professional welder to help. The main objective will be to put a V8 LS4 motor in the rear of the mini. Cut out all the rear panels and produce a subframe/roll cage to lay the mini on. I'm thinking a 5.3lt motor can't be that much bigger than a 3.2lt V6. i know it's a large amount of displacement more, but i think it's possibly. This is where someone could help me to find the dimensions of the LS4. The radiator would go up front along with other items. Also the weight of a 5.3 LS4 would help. I'll post a couple of ideas in the future.
Attached Thumbnails LS4 + Classic Mini?-mini-1.jpg  
Attached Images
File Type: bmp
5.3 V8.bmp (148.4 KB, 212 views)
Old 06-11-2012, 04:02 PM
  #2  
Registered User
Thread Starter
 
2tonedc5's Avatar
 
Join Date: Jun 2012
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

a frame like this one
and the rear end would look like this mini cut out
Attached Images
File Type: bmp
mini frame.bmp (148.0 KB, 477 views)
File Type: bmp
mini rear.bmp (147.8 KB, 345 views)
Old 06-11-2012, 05:55 PM
  #3  
Staging Lane
iTrader: (3)
 
yesaCSpencer's Avatar
 
Join Date: Mar 2010
Posts: 79
Likes: 0
Received 0 Likes on 0 Posts
Default

Dry weight is 478 for the engine w/ no PS or wiring.

Wet weight for the LS4 trans is 214

http://www.gmtuners.com/LS4/index.htm
Old 06-11-2012, 06:11 PM
  #4  
TECH Junkie
iTrader: (1)
 
Pop N Wood's Avatar
 
Join Date: May 2006
Posts: 3,402
Likes: 0
Received 7 Likes on 7 Posts

Default

Saw pictures of one done some years ago. He backhalved it for a solid rear axle too. The driveshaft was barely a foot long including the U joints.

first class build if I remember correctly.
Old 06-11-2012, 06:35 PM
  #5  
On The Tree
iTrader: (7)
 
Slick68's Avatar
 
Join Date: Sep 2011
Location: Sevierville, TN
Posts: 174
Likes: 0
Received 0 Likes on 0 Posts
Default

Anybody ever heard the term "Strapping a bumble bee to a gnat"? Cuz that's pretty much what this is going to be like. Can't wait to see the progress.
Old 06-11-2012, 09:31 PM
  #6  
Staging Lane
 
98BuickGS's Avatar
 
Join Date: May 2010
Location: Plymouth, MN
Posts: 82
Likes: 0
Received 0 Likes on 0 Posts
Default

I know this is LS1tech but why not put a SC 3800 in the back? Smaller in size and you can make 350WHP+ with a supercharged setup or more with a turbo setup. People have swapped 3.8's into feiros with good results. Just another idea.
Old 06-11-2012, 10:38 PM
  #7  
Staging Lane
iTrader: (3)
 
yesaCSpencer's Avatar
 
Join Date: Mar 2010
Posts: 79
Likes: 0
Received 0 Likes on 0 Posts
Default

They also have ls4 fieros. Try the fiero forums, they might have better answers than us...
Old 06-12-2012, 09:50 AM
  #8  
Registered User
Thread Starter
 
2tonedc5's Avatar
 
Join Date: Jun 2012
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks guys yea I might have to visit the fiero forum. I saw some ls4 swaps on YouTube. Wow didnt the ls4 weight that much but I guess it's to be expected with a 5.3 motor and all. 3.8 sounds great but I have not explored that option as of now. I'll keep it updated. Might just go the easy way out and put a busa motor in it.
Old 06-12-2012, 11:30 AM
  #9  
TECH Addict
iTrader: (15)
 
wildcamaro's Avatar
 
Join Date: Nov 2009
Location: Western PA
Posts: 2,501
Likes: 0
Received 3 Likes on 3 Posts

Default

Cool idea! Ls4 is same size as every other LS engine, but it would be easier to get an ls4 drop out since it has all the correct accessories to sit sideways...if I was you I would look to buy a wrecked (in rear) ls4 vehicle so you can use EVERYTHING bc getting it piece by piece will cost way more time and money than the large initial investment of wrecked vehicle...good luck man it would be cool! And fast bc what's a mini weigh like 500 lbs lol...
Old 06-12-2012, 11:32 AM
  #10  
On The Tree
iTrader: (2)
 
Emdmechanic's Avatar
 
Join Date: Mar 2012
Location: Mobile,Al
Posts: 116
Likes: 0
Received 0 Likes on 0 Posts
Default

I need to hit the lotto .... I want to do this too! GL with the project.
Old 06-12-2012, 04:13 PM
  #11  
Registered User
Thread Starter
 
2tonedc5's Avatar
 
Join Date: Jun 2012
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

An ls4 motor is only about 1500 from what I've seen. I think that's with a transmission too. So if I could find a wreck ls4 car for 3 grand or lower I would definitely invest in it. Wiring harnes, ECU, fuel stuff etc would help make things a lot easier
Old 06-13-2012, 03:01 PM
  #12  
Registered User
Thread Starter
 
2tonedc5's Avatar
 
Join Date: Jun 2012
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

Been looking at the fiero forums and it looks like it should fit, but then again I have not been able to find any measurements. Also Ive seen manual transmissions such as the f40 trans, which I am not at all familiar with. I am interested in getting a manual though! This weekend I'm going to get some measurements from the mini and see what I'm working with. Any help in figuring out the diameters of an ls4 with trans or with a f40 trans would be very helpful.
Old 06-13-2012, 08:45 PM
  #13  
Staging Lane
 
98BuickGS's Avatar
 
Join Date: May 2010
Location: Plymouth, MN
Posts: 82
Likes: 0
Received 0 Likes on 0 Posts
Default

No info on the LS4 but a 3800 will bolt to a getrag fwd trans. Why not just use a hayabusa motor and turbo that? Those make huge power and with the ability to rev to the moon it would be an awesome ride.
Old 06-14-2012, 12:48 AM
  #14  
TECH Addict
iTrader: (15)
 
LS1 Racing's Avatar
 
Join Date: Aug 2002
Location: 78°14′46″N 15°27′56″E
Posts: 2,419
Likes: 0
Received 5 Likes on 5 Posts

Default

If you swap in an LS4/4T65 combo, you'd better budget $3000 or so get the trans rebuilt the right way, or you'll be pulling it out for a rebuild anyway.

Also, you won't just be able to bolt an F40 trans to it...At least not without a bunch of additional modification. The LS4 starter is mounted to the trans, so anything other than the LS4-specific 4T65 will require machine work to the case. Even worse, the LS4 block does not have starter mounting provisions, so you can't use a conventional starter setup either.

A better option, if you're hell-bent on an LS motor, is to find a truck 5.3 or something like that and bolt it to the trans of your choice. If width is a concern, you could always use the LS4 crankshaft (13 MM shorter than a normal LSx crank) and accessory drive with some modification and bolt that in.

This second option is probably the most desirable because the LS4 is actually the weakest of the later 5.3s, mostly because of it's super-restrictive intake manifold, which is not easily swapped.

Having swapped an SBC into a Fiero about 12 years ago, I can tell you that no swap goes as planned but will go over budget, so anything you can do in the design stage to eliminate complexity and cost will make your life easier.
Old 06-14-2012, 09:16 AM
  #15  
Registered User
Thread Starter
 
2tonedc5's Avatar
 
Join Date: Jun 2012
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks for the info. Buick hayabusa motors do make a lot of power but it takes well over 5 grand to modify/ turbo one. That's the only reason I'm looking into other options. A motorcycle engine would be the easiest to install.
Old 08-26-2012, 09:09 AM
  #16  
Teching In
 
joakwin's Avatar
 
Join Date: Jan 2006
Location: sd
Posts: 11
Likes: 0
Received 0 Likes on 0 Posts

Default

any progress been made on this project?

im looking at doing a fwd ecotec l61 for my 84 mini mayfair

but the idea of a 4.3 or a 5.3 has crossed my mind a few times
Old 08-27-2012, 02:54 AM
  #17  
TECH Veteran
iTrader: (12)
 
Wnts2Go10O's Avatar
 
Join Date: Dec 2004
Location: Rockville, MD
Posts: 4,354
Likes: 0
Received 0 Likes on 0 Posts

Default

strangely.. an ls1 mini has been done =p. a guy here has a head/cam ls1 in a mini delivery
Old 08-27-2012, 03:09 AM
  #18  
TECH Resident
iTrader: (2)
 
tfi racing's Avatar
 
Join Date: Jun 2010
Location: Cedar,BC
Posts: 751
Received 10 Likes on 9 Posts

Default

Nothing to it.Just drop out the front subframe and everything attached to it,engine trans,suspension from the donor of your choice,remove the rack and put in fixed rods and fab the rest of your silly little car around it.That's how GM created the joke of that POS Fiero,if those guys can do it ,anybody can!
Old 08-27-2012, 08:33 AM
  #19  
TECH Resident
iTrader: (4)
 
i r teh noobz's Avatar
 
Join Date: Feb 2009
Location: Ohio
Posts: 784
Likes: 0
Received 0 Likes on 0 Posts
Default

We always liked to refer to my friend's Fiero as a "backwards Citation."

Somehow it was still pretty fun to drive.
Old 08-27-2012, 02:14 PM
  #20  
TECH Resident
 
rockytopper's Avatar
 
Join Date: Nov 2007
Location: Texas
Posts: 816
Likes: 0
Received 0 Likes on 0 Posts
Default

The original
https://ls1tech.com/forums/multimedi...rst-drive.html



Quick Reply: LS4 + Classic Mini?



All times are GMT -5. The time now is 10:47 AM.