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Eddie W · Posted: Fri Nov 28, 2003 3:44 am Post subject: 1500/1700 differences?

Can anybody tellme if there is any difference between the 1500 and 1700 heads apart from the inlet valve size? After driving daughters 1700 I've decided to look out for a 1700 for mine, but I'd like to do the samehead mods I did when I rebuilt my 1500 as they made quite an improvement throughout the rev range. I've got some spare 1500 heads and I could start moding them while I wait for a motor to turn up. Also I want to convert the 1700 to solid lifters as well. I can get the heads reseated for the bigger inlets but it would be a waste of time if the ports were much different. Look forward to some info.
Regards Eddie
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Peter D · Alfasud Joined: 15 Aug 2003 Posts: 60 Location: Denmark

Yes, the cylinder heads are different on 1500 and 1700.

On 1700 a part of the combustion chamber is recessed in the cylinder heads.

If you try to fit 1500 cylinder heads on a 1700 you will get compression ratio of about 20:1 !

You will then have to modify the 1700 pistons as well.

Peter (DK)

Eddie W · Posted: Fri Nov 28, 2003 10:28 pm Post subject:

Thanks Pete
Thats what I needed to know. I thought it couldn't be that simple.
Regards Eddie
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Matt Stolton

the obvious difference is about 200CC Laughing

I had to say it before gary got it in...
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Regards

Matt

Ex Alfa 33 'GTA' (P4 with Knobs On)
Now cruising in a 166 3.2 Ti!!

Eddie W · Posted: Sun Dec 07, 2003 11:22 am Post subject:

Thanks Matt
My calculator don't count that high but I was talking about the heads. Always read the fine print.
Regards Eddie
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