Early v Late SPRINT cylinder heads - differences ??

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simonhorton · #1 Post by **simonhorton** » Tue Apr 19, 2016 7:57 am

I have a few Sprint cylinder heads

What are the visual differences between the two ?

I know late heads have a number "2" stamped on them

Many thanks
Simon

trackerjack · #2 Post by **trackerjack** » Tue Apr 19, 2016 9:22 am

Very early ones had shallower spring seats, which when used with uprated camshafts wrecked the head due to spring coilbound problems.
I also think the waterways were enlarged but I am not sure.

matienzo · #3 Post by **matienzo** » Tue Apr 19, 2016 10:03 am

See Mikes restoration thread viewtopic.php?f=19&t=7537

simonhorton · #4 Post by **simonhorton** » Tue Apr 19, 2016 1:10 pm

I have put both heads side by side

The only difference visually is the extra casting above the exhaust ports on the later ( number 2 casting number )

Simon

James467 · #5 Post by **James467** » Tue Apr 19, 2016 2:27 pm

Have a look at my thread about early vs late heads, I think there's a link to Mikes thread as well.

viewtopic.php?f=19&t=27969&start=345

I have had a problems with the spring seats on my early one being too high, they really need to be machined down but as I now have a late one I'm just going to use that.

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Early v Late SPRINT cylinder heads - differences ??

Early v Late SPRINT cylinder heads - differences ??

Re: Early v Late SPRINT cylinder heads - differences ??

Re: Early v Late SPRINT cylinder heads - differences ??

Re: Early v Late SPRINT cylinder heads - differences ??

Re: Early v Late SPRINT cylinder heads - differences ??