Page 1 of 1

318iS upgrade to 320iS

Posted: Fri Mar 04, 2005 1:30 pm
by pomebastard
Anyone have any experience of doing this? Not to keen on LHD. So upgrading the engine in the 318iS to a 320iS seems the way to go.

Posted: Fri Mar 04, 2005 1:51 pm
by k130
If I were you I wouldnt bother putting the 320i engine into the 318i unless everything else i.e. brakes, suspension, drivetrain, fueling etc... are all in place already as the two cars are subtly different.

Of course if you do have uprated brakes and suspension then a better bet would be to find more power in the 318i engine -making better use of the lower weignt of the car -turbo/supercharger perhaps?

Posted: Fri Mar 04, 2005 1:57 pm
by Adam318i
He's got a 318iS not a std 318i, so i guess it will have discs all round and m-tec susp.

Posted: Fri Mar 04, 2005 2:25 pm
by Karan
u will have m,anifold to steering clearance problems so manifold will need modding!=PRICEY!

engines are around Ԛ£2k as well

ur ebtter of with a m50 engine from a e36 325 that has 200hp, althoughheavier than the 4 cyl engine. these m50s are cheap too

Karan

Karan

Posted: Fri Mar 04, 2005 6:38 pm
by Dom
isn't a 320 slower than an iS anyway?

Posted: Fri Mar 04, 2005 6:47 pm
by 6potWil6pot
I thnk he means the 320iS with the S14 engine shortened to 2.0

Posted: Fri Mar 04, 2005 7:11 pm
by Dom
well that makes more sense :cool:

Posted: Fri Mar 04, 2005 11:51 pm
by Boots_Walker
would you use the 2.3l motor?

Posted: Sat Mar 05, 2005 11:49 am
by pomebastard
Thanks Guys, yeah this is the 318i twin cam engine I'm talking about and replacing it with th S14 out of an Italian (stallion) 320iS.

Whay I have found out is that if I do it I'll need the complete drive train. Engine, gearbox and diff.

Just changing the engine isn't going to release the full potential of the 2 litre twin cam engine. So...

What I've yet tyo check are the differences in the suspension set up.

Plus the dreaded exhaust manaifold issue.

So maybe just living with LHD might be the second best route.

Any other ideas... keep em coming... Cheers...

Posted: Sat Mar 05, 2005 12:11 pm
by Jimbob
Just wondering, have you got a complete 320iS to rip apart then?

Seems like an expensive conversion really for what it is, but definately unique I'll give ya that.

You're in Poole right?

Posted: Sat Mar 05, 2005 5:24 pm
by Simon13
320is's used m-tech suspension as used on our 325 sports and 318is's.

Also the brakes are the same on all 3 cars so really, it's just your manifold issue you would have to worry about all the rest will be a bolt off bolt on affair to my knowledge

Posted: Sat Mar 05, 2005 6:45 pm
by Moofles
wouldn't think he'd have to change the gearbox but maybe the diff as he would be on iS-style 4.1 ratio wouldn't he, and a 3.73 or 3.91 would be more suitable for the 320iS power

Posted: Sat Mar 05, 2005 8:25 pm
by Karan
surelyt the iS needs an m3 3.25 ratio diff to compensate for the dogleg box????

Posted: Sat Mar 05, 2005 8:32 pm
by Moofles
he doesn't have the 320iS gearbox tho does he? i thought he has the 318iS gearbox, that will be ok won't it

Posted: Sat Mar 05, 2005 8:54 pm
by Karan
engine and box wont join if that is the case

Posted: Sun Mar 06, 2005 10:08 pm
by jono
i am after one of these 2.0l 4 cylinder engines where did you get this one / how can i get hold of one, do you want to px ot for a M42 1.8 engine

Posted: Mon Mar 07, 2005 8:57 am
by CaesarBob
If you swap the M42 for an S14 you'll definitely need the gearbox and diff. The Getrag 240 box from the iS won't fit the S14 and your probably gonna need the diff as well. 320iS' ran a 3.45 diff as standard so if you leave the small case 4.10 in, it'll be a nightmare to drive and probably won't last long.

As already said the suspension and brakes will be the same spec. Only major headache should be the manifold clearance.

Good luck.

Posted: Wed Mar 09, 2005 12:25 pm
by pomebastard
Guys... I really appreciate all your comments. It's helped loads..

No I havn't bought any bits as yet. Still doing the rearch first to figure what's what and if it's really worth doing.

I'll keep you posted on progress... cheeeers...

Posted: Wed Mar 09, 2005 11:14 pm
by Simon
pomebastard wrote:
I'll keep you posted on progress... cheeeers...
Sad bastard....

Posted: Wed Mar 09, 2005 11:15 pm
by billgatese30
:clap:

Posted: Thu Mar 10, 2005 9:42 am
by kevin316i
It might be easier (and cheaper) to convert a 320iS to RHD. A few E30 M3s were converted by Birds UK using 325i bits.

Posted: Thu Mar 10, 2005 6:00 pm
by Simon13
kevin316i wrote:It might be easier (and cheaper) to convert a 320iS to RHD. A few E30 M3s were converted by Birds UK using 325i bits.
And they are sh!te compared to the LHD cars

Posted: Thu Mar 10, 2005 6:27 pm
by Jhonno
if your gonna buy an m3 or 320iS the LHD is part of the experience plus the much quicker steering rack!

Posted: Fri Mar 11, 2005 9:29 am
by kevin316i
That is true, a RHD conversion won't have the same steering response or brake response either. But some people believe the compromise is acceptable, otherwise these conversions wouldn't have existed.