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BFB
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PostPosted: Sat Apr 17, 2021 6:21 pm    Post subject: split heads? Reply with quote

why is it you dont see split heads now like you used to? weren't they the bees knees at one time? or was it just something that was popular but not really beneficial?
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FreeBug
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PostPosted: Sun Apr 18, 2021 1:59 am    Post subject: Re: split heads? Reply with quote

There's also the issue of very limited number of choices: I think they were only ever made by one company, and only in one size; I think it may have been Scat.
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PostPosted: Sun Apr 18, 2021 7:24 am    Post subject: Re: split heads? Reply with quote

yep scat split ports. they still make them. ! never knew anyone to use them.
maybe the $1500+ price point is a bit much for most. would be interesting to see if anyone chimes in if they tried them Popcorn
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BFB
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PostPosted: Sun Apr 18, 2021 8:49 am    Post subject: Re: split heads? Reply with quote

if thats the case id assume youd be limited to scat only rockers for the split heads
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Forced induction can overcome a lot of obsticles that gets in it's way
"You are the Engineer and the Mechanic.  
Build it your way not the way someone else does it. Their way might not work for you." - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
“ The monkey see monkey do mentality seems to run deep in VW people. "Gene Berg said it was so 30 years ago so thats the way it is" “ - bdkw1
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mark tucker
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PostPosted: Sun Apr 18, 2021 9:16 am    Post subject: Re: split heads? Reply with quote

I think they axcept vw type rockers... so no real issue there. I was going to run some but when I got all the $$ up the guy had sold them all...oh well.
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GARRICK.CLARK
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PostPosted: Sun Apr 18, 2021 9:25 am    Post subject: Re: split heads? Reply with quote

I wondered if 4 head studs per split cylinder head was as strong as 8 head studs Combined into 1 head. Especially on a mag case.
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PostPosted: Sun Apr 18, 2021 9:42 am    Post subject: Re: split heads? Reply with quote

I wonder about cooling. There is little room for fins on side where the heads are together.
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BFB
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PostPosted: Sun Apr 18, 2021 9:54 am    Post subject: Re: split heads? Reply with quote

mark tucker wrote:
I think they axcept vw type rockers... so no real issue there. I was going to run some but when I got all the $$ up the guy had sold them all...oh well.


maybe i didn't word it correctly or only wrote a partial though. maybe rockers themselves interchange but they'd have to use different shafts? split head has to = split shaft and you couldn't have just one rocker stud per side..
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Forced induction can overcome a lot of obsticles that gets in it's way
"You are the Engineer and the Mechanic.  
Build it your way not the way someone else does it. Their way might not work for you." - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
“ The monkey see monkey do mentality seems to run deep in VW people. "Gene Berg said it was so 30 years ago so thats the way it is" “ - bdkw1
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Chip Premium Member
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PostPosted: Sun Apr 18, 2021 1:03 pm    Post subject: Re: split heads? Reply with quote

Looks like they come with a shaft. Not sure what rockers will work on them. Maybe their Pro Series would though. So at least a 1.25 or 1.4 option. I didn't realize that they were still available. But just checked their site and sure enough. 92, 94 and 101.6 bore options available. $1500 for a set of 48x38 race heads seems pretty competitive to me. A set of un-ported 46x38 Comp-E heads is $1575 or so. Not sure how the split ports compare flow wise to the CB head, but seems to be a not bad alternative.
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vwracerdave
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PostPosted: Sun Apr 18, 2021 4:23 pm    Post subject: Re: split heads? Reply with quote

The Scat split port heads have been around for 30 years. You can tell by how many sets you see exactly how successful they were. Too pricy for most cheap VW people. They seemed to have some popularity in the airplane engine groups.
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Dale M.
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PostPosted: Sun Apr 18, 2021 4:24 pm    Post subject: Re: split heads? Reply with quote

Keith Seume has a few words about split heads in his book "Aircooled VW Engine Interchange Manual"....

Dale
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