Converting a FWD to RWD via an engine swap to the rear

Converting a FWD to RWD via an engine swap to the rear

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SkinnyBoy

Original Poster:

4,635 posts

259 months

Saturday 5th July 2008
quotequote all
Done a search but couldn't find what i am after.

Basically, I've seen plenty of cars such as that Saxo(?) that was on here that had the engine transplanted in to the rear.

My main question is, whats the process from start to finish, including road worthiness etc.

For a few years I've had the insane idea of getting a Prelude shell and slapping an NSX engine in the rear. The only thing stopping me is the prospect of it never becoming street legal.



Over to the experts...


wildoliver

8,789 posts

217 months

Saturday 5th July 2008
quotequote all
If you want to end up with a car with debatable handling capabilities, dodgy reliability, virtually zero value, hard to insure, possibly slower and poorer handling than cars costing a fraction of the amount BUT totally different and unique go for it. But it will cost more than you think, it will be hard work, it will be hugely expensive if you pay someone else to do it eg. Z-cars.

Your proposed project I wouldn't even consider were it me as you won't end up with a particularly good or nice or even quick car at the end of it, and it will end up almost the same price as a real NSX I suspect.

But if you want to do it go for it.

SkinnyBoy

Original Poster:

4,635 posts

259 months

Sunday 6th July 2008
quotequote all
wildoliver said:
If you want to end up with a car with debatable handling capabilities, dodgy reliability, virtually zero value, hard to insure, possibly slower and poorer handling than cars costing a fraction of the amount BUT totally different and unique go for it. But it will cost more than you think, it will be hard work, it will be hugely expensive if you pay someone else to do it eg. Z-cars.

Your proposed project I wouldn't even consider were it me as you won't end up with a particularly good or nice or even quick car at the end of it, and it will end up almost the same price as a real NSX I suspect.

But if you want to do it go for it.
Thats the kicker i know. I really would love to do something unique. I know the cost is not effective its not about that. I'm going down the lines like Andy GTT and his home grown supercar. The idea of a sleeper looking car with awesome handling and speed is what my goal ultimately is. I suppose a tube/space frame chassis would be the way forward, skinned to "look" like a prelude on steroids I guess, but still look convincing, all the time with the engine in the back, since theres more room to play with forced induction out the back from a packaging perspective. Its not going to happen in the near future but its something i am seriously contemplating.

thetrash

1,847 posts

207 months

Sunday 6th July 2008
quotequote all
SkinnyBoy said:
Thats the kicker i know. I really would love to do something unique. I know the cost is not effective its not about that. I'm going down the lines like Andy GTT and his home grown supercar. The idea of a sleeper looking car with awesome handling and speed is what my goal ultimately is. I suppose a tube/space frame chassis would be the way forward, skinned to "look" like a prelude on steroids I guess, but still look convincing, all the time with the engine in the back, since theres more room to play with forced induction out the back from a packaging perspective. Its not going to happen in the near future but its something i am seriously contemplating.
It wont have awesome handling or be that quick, the whole car is designed for the engine in the front. Have you looked under the bonnet of a prelude there's load of room to go FI.

Holst

2,468 posts

222 months

Sunday 6th July 2008
quotequote all
I dont think its worth it with a prelude IMO.

Your going to mess up the handling and weight distribution.

The most difficult thing will be designing and manufacturing new rear suspension. Unless you know what your doing with this then its going to be horrible to drive

The NSX engine will be hard to get hold of and might be expensive to buy.

If you really want a fast prelude then you will be better off tuning the stock prelude engine, 250bhp wont be all that hard to get too, and some guys in the US have 300bhp with major mods.

Although I own a prelude and love them, I dont think its worth converting one to RWD. You may as well buy an MR2, Skyline, Porsche or other fast RWD car.

chuntington101

5,733 posts

237 months

Monday 7th July 2008
quotequote all
the is a company that offer mid engined conversions for the saxo. i cant remeber what they are called but they normally advertise in the back of PPC.

Cheers Chris.

PS. sounds an intresting swap!

900T-R

20,404 posts

258 months

Monday 7th July 2008
quotequote all
A Canadian ice racer did this once with a classic Saab 900 Turbo (back before they were 'classics') by welding in a front clip (excluding outer wheelwells) complete with the double wishbone front suspension at the rear - quite successfully so if I remember correctly.
Note that the c900 has a longitudinal engine, and the double wishbones allow for full adjustment of camber as well as castor and toe (of course, the tie rods would be attached to a fixed point rather than a steering rack at the rear) - also, it's a lot less difficult to set up a car for a very defined set of conditions than for general road/track use.

I also seem to distinctly remember a Saab engineer did something very similar in the early Eighties - I think one of the big US mags (R&T, C&D) did a feature on that car back then.

deviant

4,316 posts

211 months

Tuesday 8th July 2008
quotequote all
chuntington101 said:
the is a company that offer mid engined conversions for the saxo. i cant remeber what they are called but they normally advertise in the back of PPC.

Cheers Chris.

PS. sounds an intresting swap!
Probably Z-Cars

Nothing to do with me... www.zcars.org.uk

chuntington101

5,733 posts

237 months

Tuesday 8th July 2008
quotequote all
deviant said:
chuntington101 said:
the is a company that offer mid engined conversions for the saxo. i cant remeber what they are called but they normally advertise in the back of PPC.

Cheers Chris.

PS. sounds an intresting swap!
Probably Z-Cars

Nothing to do with me... www.zcars.org.uk
no it was a smaller company then them. they are building a twin engined corsa using two c20let engine i think. they are looking for 450 bhp from EACH engine! should be an intresting car when done! lol also they have build verious fiat and saxos with mid mounted 'busa engiens in.

Chris

TEKNOPUG

18,974 posts

206 months

Thursday 10th July 2008
quotequote all
Cut out the entire engine bay, including inner wings. Cut out the back of the Saxo and weld in the engine bay. The you have all the mounting points for engine, gearbox and suspension. You need to reverse the final drive so you go forwards instead of backwards.

have a look here for inspiration: http://205mi32.com


Paul Drawmer

4,879 posts

268 months

Saturday 12th July 2008
quotequote all
Here's a Clio that someone did earlier.
http://www.pistonheads.com/sales/596395.htm
Oh yes, it was done by Renault.
You could spend a bundle trying to get it right. or just buy one of these.
If you do look at these little fun-buckets, I'd keep to the Mk2 ones, since they display very lightly less spin-happy behaviour.

welwynnick

107 posts

193 months

Monday 14th July 2008
quotequote all
I think I would dip my toe in the water and make a kit car first, like a Westfield or an Ultima (or something in between!) and see something of what's involved.

If that doesn't put you off, then maybe get more ambitious.

Nick

Mr POD

5,153 posts

193 months

Monday 14th July 2008
quotequote all
There's a mk1 astra gte, has been at a few shows, which basically is made from a shortened Calibra Turbo 4X4 floor pan, welded to the astra body. Fecking mad.


SkinnyBoy

Original Poster:

4,635 posts

259 months

Monday 14th July 2008
quotequote all
Thanks for the input chaps, ZCars is the site i was after.

I actually rebuild cars for a living, I run a panel shop and have access to car-o-liners, migs, the lot.

Also my relative runs a Honda wreckers, so parts are not a problem, i can get a rear cut NSX for about 4 grand.

My idea is to create a super sleeper. What to all intents and purposes looks to the average punter a normal 4th gen Prelude, but underneath beats a supercharged NSX engine, RWD, lightweight body and tube chassis. The exterior would look a bit like a stock prelude although obviously the track would be slightly wider, but subtle sculpting would cover that.

Its only in my head at the moment, but once its down on paper and i work out the ins and outs, i'll let you know.

chuntington101

5,733 posts

237 months

Monday 14th July 2008
quotequote all
SkinnyBoy have yiou thought aboutusing the V6 that was in the Prelude?? i hear they can take about 11opsi of boost as standard and should be LOT cheaper than the NSX engine!

Chris.

5318008

107 posts

190 months

Monday 14th July 2008
quotequote all
I've got a mate who is in the process of putting a 5L TVR V8 into the back of an austin metro. Go for it.

Have a look at the RX7 engined VW beetle on youtube to make you chuckle.

I vote Fiat 126 with a bike engine or something similar

900T-R

20,404 posts

258 months

Monday 14th July 2008
quotequote all
5318008 said:
Have a look at the RX7 engined VW beetle on youtube to make you chuckle.
There's also one (13B) living in the back of a Skoda Estelle...

chuntington101

5,733 posts

237 months

Tuesday 15th July 2008
quotequote all
900T-R said:
5318008 said:
Have a look at the RX7 engined VW beetle on youtube to make you chuckle.
There's also one (13B) living in the back of a Skoda Estelle...
they sound great builds! any more info??

Chris.

900T-R

20,404 posts

258 months

Tuesday 15th July 2008
quotequote all
chuntington101 said:
900T-R said:
5318008 said:
Have a look at the RX7 engined VW beetle on youtube to make you chuckle.
There's also one (13B) living in the back of a Skoda Estelle...
they sound great builds! any more info??

Chris.
It was in the March 2005 issue of Retro Cars I think - IIRC it used a Beetle transaxle...

chuntington101

5,733 posts

237 months

Wednesday 16th July 2008
quotequote all
900T-R said:
chuntington101 said:
900T-R said:
5318008 said:
Have a look at the RX7 engined VW beetle on youtube to make you chuckle.
There's also one (13B) living in the back of a Skoda Estelle...
they sound great builds! any more info??

Chris.
It was in the March 2005 issue of Retro Cars I think - IIRC it used a Beetle transaxle...
blooming heck the beetle gusy are sticking anything in these days! lol

i had heard of Scooby engines being run and even a front engined V8 but not the 13B.

Chris.