2000cc Head swap & timing belt length

kmoses · Post by **kmoses** » Sun Mar 15, 2015 8:05 pm

The '79 2.0L (1995cc) timing belt has 148 teeth and the '78 1.8L (1756cc) timing belt has 146 teeth. If I put a '78 1756cc head on the '79 2.0L block, what belt do I use? Is the difference in the cam box height, timing pulley size, or ???

kmead · Post by **kmead** » Sun Mar 15, 2015 9:16 pm

Block height.

The 1756 has a shorter block and stroke. You should still use a 1995 timing belt. If the head has been shaved, you may need to think about a set of adjustable timing gears to get to optimal timing for performance.

kmoses · Post by **kmoses** » Sun Mar 15, 2015 10:30 pm

Thanks for the help and the fast reply.

bradartigue · Post by **bradartigue** » Sun Mar 15, 2015 11:21 pm

To add a bit more:

All of the heads are the same height. The 1592, 1796, and 1995 blocks are all different heights. For these engines block determines belt length.

vandor · Post by **vandor** » Mon Mar 16, 2015 12:02 am

> The 1592, 1796, and 1995 blocks are all different heights.

Hm, no, the two 1600s and the 1756 take the same belt. The 1438 is shorter, and does take a shorter belt.

bradartigue · Post by **bradartigue** » Mon Mar 16, 2015 2:54 pm

vandor wrote:> The 1592, 1796, and 1995 blocks are all different heights.

Hm, no, the two 1600s and the 1756 take the same belt. The 1438 is shorter, and does take a shorter belt.

You are correct. 1438 is different from 1592/1608/1756 and both are different from each other and 1995. Sorry, brain melt.

buckspet · Post by **buckspet** » Sat Sep 05, 2015 8:17 pm

I'm thinking of swapping the cylinder head on my 79 2000l with a 1800 head..while at it I was thinking of having the head milled to further increase the miserable original compression. How much to mill? is 10-1 ratio feasible? what other things need to be addressed with this type of modification...will use a 1800 single plain and a 34ADF carb

131 · Post by **131** » Sat Sep 05, 2015 8:28 pm

You'll have a hard time getting 10:1 by shaving the head. Fiat mostly altered compression with pistons.

buckspet · Post by **buckspet** » Sat Sep 05, 2015 9:49 pm

79 runs strong for a smogger..so I really don't want to do the bottom end, just trying the easy stuff for now. so i'm wondering how much is safe to shave & what would the approximate compression be...anybody have experience doing this?

fiatfactory · Post by **fiatfactory** » Sat Sep 05, 2015 10:11 pm

buckspet · Post by **buckspet** » Sat Sep 12, 2015 2:57 pm

Well it turns out I can't locate my 1800 head...put it in storage 30 years ago and moved my toys twice in that time...But I did find a nice fuel inj cylinder head coplete,a 1800 intake manifold, and a FI exhaust manifold with the O2 sensor still on it. Now I need some info about milling the head, new valve spring suggestions and a 34ADF carb. Hopefully I can get by with as little $ as possible. ..either a hard to find used 34ADF or a knock off version if and only if our members can suggest it from actual use. Also valve spring suggestions, manufacturer recommendations. THANKS FOR ALL THE VALUABLE INFORMATION FROM THE BEST FORUM MEMBERS EVER

2000cc Head swap & timing belt length

2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap to 1800 how much to mill?

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length

Re: 2000cc Head swap & timing belt length