Register Login
Save up to 15% with Adrian Flux insurance!
Reply
 
Thread Tools
Old 24-04-2006   #1
Join Date: Dec 2004
Posts: 17
Thanks: 0
Trader Rating: 0
Egypt 
modifying 1116cc sohc

plz can i rebore the block of my 1116 cc motor to fit the pistons of the 1372cc and turn it to 1372cc?
if it can be done what parts do i must modify and replace and what crank and connecting rods?
and what stock cam and carb i must fit to this motor?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ahmed_mahdy2003 is offline Reply With Quote Quote 
Old 26-04-2006   #2
Join Date: Dec 2004
Posts: 17
Thanks: 0
Trader Rating: 0
Egypt 
Re: modifying 1116cc sohc

no one to reply thx
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ahmed_mahdy2003 is offline Reply With Quote Quote 
Old 29-04-2006   #3
Shut Up, Fool!
 
thepottleflump's Avatar
Join Date: Jan 2005
Location: Surrey
Posts: 2,538
Thanks: 22
Trader Rating: 0
thepottleflump has donated!
United Kingdom 
Re: modifying 1116cc sohc

Aren't the 1116 and 1372 from a seperate engine family, the 1116C dating back to the 60's while the 1372 being from the more modern FIRE range? Or am I talking crap? If you are taking about rebores etc you might be better off looking for a low mileage replacement of the capacity you are after.
__________________
1999 Alfa Romeo GTV V6
thepottleflump is offline Reply With Quote Quote 
Old 01-05-2006   #4
Join Date: Dec 2004
Posts: 17
Thanks: 0
Trader Rating: 0
Egypt 
Re: modifying 1116cc sohc

no both from the 128 based engines non fire engines
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ahmed_mahdy2003 is offline Reply With Quote Quote 
Old 29-05-2006   #5
Join Date: Dec 2004
Posts: 17
Thanks: 0
Trader Rating: 0
Egypt 
Re: modifying 1116cc sohc

still no reply
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ahmed_mahdy2003 is offline Reply With Quote Quote 
Old 29-05-2006   #6
Join Date: Aug 2003
Location: Essex/Suffolk border
Posts: 82,448
Thanks: 1458
Trader Rating: 10
dave has donated!
dave is an official FF Advertiser
dave is an honorary friend of the forum :)
United Kingdom 
Re: modifying 1116cc sohc

i dont know the answers sorry pm a user called oldschool he may be able to help but not seen this post
__________________
dave is offline Reply With Quote Quote 
Old 30-05-2006   #7
Join Date: Mar 2004
Location: Boddington, Western Austr
Posts: 140
Thanks: 3
Trader Rating: 0
Australia 
Re: modifying 1116cc sohc

Brief rundown on the sohc Fiat engine

available in the following sizes,

1116cc, 1290cc, 1299cc, 1301cc, 1372cc, 1495cc, 1581cc.

These are acheived with a combination of bores and strokes.

Bores sizes (std) 80.0mm, 80.5mm, 86.0mm, 86.4mm.

Stroke lengths, 55.5mm, 63.9mm, 67.4mm.

What Ahmed wants to do (I think) is take a 128 series engine (80.0 x 55.5 1116 cc combination) and install a 67.4mm crankshaft and rebore to 80.5mm (1372cc capacity) ... which will work, but unfotunately not with a combination of standard Fiat parts.

The 67.4mm crank from a Tipo/brava/bravo/uno etc etc will fit into the 1116,1290,1299,1301,1495 crankcase, with a slight bit of file work to the sides near the gasket face to allow a little clearance.

But the standard 1372cc combination from Fiat doesn't use the shorter of the two block heights used in the sohc engine series...

so if you install the long stroke 67.4mm crank into the short block you need to use either

A) very short conrods, and I know of none from the Fiat parts bin that will do the job. , so they would be custom items.

B) have different pistons made with a shorter compression height (distance from the gudgeon pin centre line to the top of the piston) again I know of no "off the shelf' Fiat items with the correct bore size and Comp. height, so they would be custom items

Another thing you need to know is the two block heights have differnt conrod lengths also, the shorter stroke 1116 and 1290, 1299 and 1301 cc combinations use a shorter cast con rod, whereas the taller block engines use a longer conrod which (most of the time) is a forged item.

SteveC
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

fiatfactory is offline Reply With Quote Quote 
Old 30-05-2006   #8
Join Date: Dec 2004
Posts: 17
Thanks: 0
Trader Rating: 0
Egypt 
Re: modifying 1116cc sohc

thank u steve for your reply.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ahmed_mahdy2003 is offline Reply With Quote Quote 
Old 16-08-2006   #9
Join Date: Aug 2006
Location: Mar del Plata
Posts: 7
Thanks: 0
Trader Rating: 0
Argentina 
Re: modifying 1116cc sohc

you can put the 1400cc ( fiat uno engine) crankshaft, and buy special pistons for that modification. Here in Argentina is a very common modification. You do not have to modify the bore!!!
The pistons are easy to buy here I dont know if are common in other countries.
You can use the UNO carb and intrke manifold with no modifications.
See my car in Members motors!!! I have installed that carb.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides


Last edited by powermeter; 16-08-2006 at 21:15.
powermeter is offline Reply With Quote Quote 
Old 17-08-2006   #10
Join Date: Mar 2004
Location: Boddington, Western Austr
Posts: 140
Thanks: 3
Trader Rating: 0
Australia 
Re: modifying 1116cc sohc

The standard compression height of the sohc 1116cc engine is 34.7mm, the standard stroke is 55.5mm.

If we were to modify the stroke to 67.4mm and keep the same conrod length and block height, we would need to shorten the piston compression height by (67.4 - 55.5) /2) 5.95mm to make it all fit , meaning we want a piston with a similar head design, but a compression height of 27.75mm (34.7 - 5.95)

Looking thru lists of pistons in my Mahle catalogue, there is one that "could" perhaps do the job from the Fiat parts bin.

M645 and 182.B6 (Euro 3) variants of the bravo/brava/marea/stilo 1596cc engine ... they are 16valve engines so the flycuts won't be correct, but they are 80.5mm and have a CH of 28.65 but have a dished head... so they could be "made" to fit and are certainly close enough to investigate further...

The other option at 81mm is from an Audi A6...81mm bore , 28.8 CH and a 5.2mm dome ...

SteveC
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

fiatfactory is offline Reply With Quote Quote 
Old 17-08-2006   #11
Join Date: Aug 2006
Location: Mar del Plata
Posts: 7
Thanks: 0
Trader Rating: 0
Argentina 
Re: modifying 1116cc sohc

here are the special pistons


thy are fabricated specially for the modification, they donīt modify the compression height.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

powermeter is offline Reply With Quote Quote 
Old 28-09-2006   #12
Join Date: Dec 2004
Posts: 17
Thanks: 0
Trader Rating: 0
Egypt 
Re: modifying 1116cc sohc

Quote Originally Posted by powermeter
here are the special pistons


thy are fabricated specially for the modification, they donīt modify the compression height.
how much did it cost for these pistons
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ahmed_mahdy2003 is offline Reply With Quote Quote 
Old 04-10-2006   #13
Join Date: Aug 2006
Location: Mar del Plata
Posts: 7
Thanks: 0
Trader Rating: 0
Argentina 
Re: modifying 1116cc sohc

about 300 U$ plus shipping
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

powermeter is offline Reply With Quote Quote 
Reply
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump
Similar Threads
Thread Thread Starter Forum Replies Last Post
(G) Fiat History -- 132 block? alexx19 124 Spider (Classic) 3 01-12-2005 05:30
(T) Modifying Stilo JTD siuron Stilo 54 02-05-2005 23:14
Modifying a Fiat Uno.HELP!!!!! Sparco Lets Talk FIAT 27 22-04-2004 16:09
(S) Modifying... Brava GT Bravo / Brava 25 06-11-2003 01:34