➜ advanced search
Add a more detailed reply Start a new thread in the Engines forum
Home -> Forums -> Engines -> 1.8 16v bottom ens or Mi16 1.9 bottom end????

displaying posts 1 to 9 of 9

Author Subject: 1.8 16v bottom ens or Mi16 1.9 bottom end????
talbotsteve

Regular

Location: millom

Registered: 06 Dec 2003

Posts: 335

Status: Offline
Post #1
Looking at engine options for my Xsara now I'm keeping it. It has a 1.8 alloy block 16v, I have a spare 1.8 16v head I'm going to port and gti6 cams inlet and exhaust manifolds.
I want to stay with the alloy block so would a 1.9 mi16 bottom end be any better? I'm not just thinking capacity wise but is it a different design? better in the long run type thing if I decide to turbo?
I take it my 1.8 head will fit? I have read that a ported 1.8 head is better than the GTi6 head as it has bigger valves?

Just looking for a few ideas and pointers really.

________________________________________

MMMM you won't like this but I just love Citroens!!!!!!!
Posted 14th Nov 2012 at 19:39
Profile
eliotrw

Seasoned Pro

Location: Southwark

Registered: 18 Jul 2010

Posts: 4,864

Status: Offline
Post #2
chop all of it in and fit and ew based on what you are saying.
Like alloy blocks? : check
Like big valves: check
rare engine?: hell no

________________________________________

Ex- Phase 3 China GTi-6 T-Reg
Posted 14th Nov 2012 at 19:42
Profile
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline
Post #3
The design is night on identical to all intents, just lots of minor details here and there different.

An Mi will be old and tired, costly to make good.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 14th Nov 2012 at 19:50
Profile
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline
Post #4
just put this in it

http://www.306gti6.com/forum/showthread.php?id=151897

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 14th Nov 2012 at 19:51
Profile
talbotsteve

Regular

Location: millom

Registered: 06 Dec 2003

Posts: 335

Status: Offline
Post #5
welshpug! wrote:
just put this in it

http://www.306gti6.com/forum/showthread.php?id=151897


You do recall I was breaking this car as I'm skintWhistle
The above whilst nice is not an option, so if you had to choose which would you go for? stick with the 1.8 which I have or buy an mi16 bottom end for £100?
Whats the difference in compression will the 1.9 be any better I guess is what I need to know...

________________________________________

MMMM you won't like this but I just love Citroens!!!!!!!
Posted 14th Nov 2012 at 20:04
Profile
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline
Post #6
mi is the same compression ratio as the 1.8.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 14th Nov 2012 at 20:29
Profile
talbotsteve

Regular

Location: millom

Registered: 06 Dec 2003

Posts: 335

Status: Offline
Post #7
So stick with what I've got then as the gains are minimal if anything.

________________________________________

MMMM you won't like this but I just love Citroens!!!!!!!
Posted 14th Nov 2012 at 20:33
Profile
ryangti6

Seasoned Pro

Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

Status: Offline
Post #8
I could well be wrong but from what I remember of the pistons you would have more valve clearance with an mi bottom end as they have larger cutouts.

That said even if I am right seeing as you are only planning to run stock rs cams you won't have an issue with either. The problem with mi's is the well known oil surge issue, there are many different theories on causes and cures but no real definitive answer. Mine has been in my 205 5000 miles with no issue at all but it was totally rebuilt. If you do go for one then you definitely need to be budgeting for a full rebuild as most are going to be f**ked these days.

________________________________________

Ryan
Posted 15th Nov 2012 at 09:36
Profile
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline
Post #9
its not oil surge purely, its oil starvation due to the amount of oil the rest of the engine uses, highlighted by oil surge.

indeed it will be pretty tired at £100.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 15th Nov 2012 at 10:09
Profile
Home -> Forums -> Engines -> 1.8 16v bottom ens or Mi16 1.9 bottom end????

All times are GMT. The time is now 03:42

The Peugeot GTi-6 & Rallye Owners Club - ©2024 all rights reserved.

Please Note: The views and opinions found herein are those of individuals, and not of The Peugeot 306 GTi-6 & Rallye Owners Club or any individuals involved.
No responsibility is taken or assumed for any comments or statements made on, or in relation to, this website. Please see our updated privacy policy.