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Toymods » Tech & Conversions » 18r-gu head no. 88251 - good ? bad?

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Mr DOHC
Forums Junkie


Location:
Brisbane
Registered:
October 2002
 
Re: 18r-gu head no. 88251 - good ? bad? Sat, 21 August 2004 00:35 Go to previous messageGo to previous message
i stole this from another one of Karls threads

Quote:


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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SubjectPosterDate
Read Message   18r-gu head no. 88251 - good ? bad? brett_celicacoupeThu, 19 August 2004 03:48
Read Message   Re: 18r-gu head no. 88251 - good ? bad? THE WITZLThu, 19 August 2004 04:31
Read Message   Re: 18r-gu head no. 88251 - good ? bad? brett_celicacoupeThu, 19 August 2004 06:18
Read Message   Re: 18r-gu head no. 88251 - good ? bad? munkiThu, 19 August 2004 10:20
Read Message   Re: 18r-gu head no. 88251 - good ? bad? THE WITZLThu, 19 August 2004 12:37
Read Message   Re: 18r-gu head no. 88251 - good ? bad? drift86levinFri, 20 August 2004 23:20
Read Message   Re: 18r-gu head no. 88251 - good ? bad?  Mr DOHCSat, 21 August 2004 00:35
Read Message   Re: 18r-gu head no. 88251 - good ? bad? Mr DOHCSat, 21 August 2004 00:37
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