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Location:
townsville NQLD
Registered:
February 2004
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18r-gu head no. 88251 - good ? bad?
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Thu, 19 August 2004 03:48
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is this a good rgu head no.11111-88251? i searched the old forums and it seemed to not mention that head no.
thanx
brett
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18r-gu head no. 88251 - good ? bad?
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Thu, 19 August 2004 04:31
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probably same as 88250 head.
I really should get down to Dominator and get some pics up of the stripped 88250 head i'm having rebuilt
Its not the 88230 or 88210 so be happy 
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Location:
townsville NQLD
Registered:
February 2004
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Re: 18r-gu head no. 88251 - good ? bad?
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Thu, 19 August 2004 06:18
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yeah thanx for the info.
yeah i noticed thats its not a 230 or 210 so thats good.
so i guess this head would have the pros and con's of the 250
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Location:
Gold Coast
Registered:
October 2002
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Re: 18r-gu head no. 88251 - good ? bad?
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Thu, 19 August 2004 10:20
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whats getting done to your rg head witzl?
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 18r-gu head no. 88251 - good ? bad?
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Thu, 19 August 2004 12:37
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its just getting reassembled, cleaned, checked, shimmed, and MINOR porting work done.
I'll dry to drop by tomorrow arvo or morning and get pics of the ports behind the valves, there is some ugly casting work just near the valves seat sleeves that just had to be removed.
Dominator in Guildford, SYD does a tops job - Terry is awesome. Price is right too  Check out the sponsors page!
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Location:
brisvegas
Registered:
August 2004
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Re: 18r-gu head no. 88251 - good ? bad?
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Fri, 20 August 2004 23:20
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what are the differences between the heads? iv'e got a 250 head for sale if anyone is interested, from the differences i see, they have different front covers 2 bolt i think, and emmision stuff on the exhuast ports (which i have had filled in and smoothed)
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Location:
Brisbane
Registered:
October 2002
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Re: 18r-gu head no. 88251 - good ? bad?
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Sat, 21 August 2004 00:35
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i stole this from another one of Karls threads
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Quote:
> Here's some head numbers off Al's 18RGs:
>
> 88250:
> - 49657 single spring early rgu single dump ex ok head small studs on ex
> - 52978 same as above
> 88253:
> - 73086 double spring late rgu good head to start with large studs on ex
duel dump man
> - 62744 single late rgu still good head may be small stud ex should be
single dump
> - 81784 double spring late also
> - 87278 double spring late also
> 88270: these are ale efi heads all double springs alll good heads these
are the ones you use
> - 35140 biggest ports biggest valves no smog ports best casting
> - 08037
> - 49383 very late head newest ive seen
> ?:
> - 81225 same as above double late rgu if the head is a 11111-88253 not a
11111-88270
> 88253 88270s would be the heads of choice since these need very little
work from the factory these willl make lots of power with little porting
they will make a lot more power with a lot of porting the castings are a lot
thicker around the ports so there is a lot of room
the 88250s can be made good but the ex studs should be changed up to 10mm
ones for best sealing
all of these engines should have 8.5s to 1 but the efi 88270 heads they
should have 8.3 to 1
just be glad you dont have any of those 11111-88230 or 88210 heads they are
good paper weights
hope this helps your info of what you got there sounds like my garage
i think i have 15-18 heads right now
cary
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Location:
Brisbane
Registered:
October 2002
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Re: 18r-gu head no. 88251 - good ? bad?
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Sat, 21 August 2004 00:37
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hey karl, get some new springs too, for $100 a set u cant go wrong
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