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#1
12-12-2002, 10:23 AM
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I have a 389 ('66 GTO) that needs cylinder boring to clean it up, but it is at .060 over already. Can I safely go bigger? Will I need custom made (expensive) pistons for this?
Thanks Ken |
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#2
12-12-2002, 10:23 AM
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I have a 389 ('66 GTO) that needs cylinder boring to clean it up, but it is at .060 over already. Can I safely go bigger? Will I need custom made (expensive) pistons for this?
Thanks Ken |
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#3
12-12-2002, 10:26 AM
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I'd look for a new block, It sometimes runs hot at .060, I wouldn't want to go bigger,
http://kurtspontiac.homestead.com/Pre1964Pontiacs.html
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http://kurtspontiac.homestead.com/Pre1964Pontiacs.html |
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#4
12-12-2002, 12:57 PM
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4.0625 + 0.060 = 4.1225
Maybe you could use custom 4.125 pistons. At least it's a common ring size. http://fiedlerh.home.att.net/
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http://www.pontiacpower.org/ |
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#5
12-12-2002, 01:35 PM
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Are all 389's alike? I can get my hands on a 65 Catalina with a 389.
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#6
12-12-2002, 01:40 PM
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Theres very little difference in a 65 and 66 389 block
http://kurtspontiac.homestead.com/Pre1964Pontiacs.html
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http://kurtspontiac.homestead.com/Pre1964Pontiacs.html |
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#7
12-12-2002, 02:02 PM
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If it a matching no 389 for your GTO don't throw it away. Get it sonic tested and check the cylinder wall thickness.I have gone .90 on 400 blocks with no problems.You probably could use a .40 or .60 over 400 piston and be ok.
wanna race? gimmie the move--
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 1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Tri power, 4speed, barn find 1966 GTO Ragtop 1969 GTO Judge RA lll, auto 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds Factory stock oval track car |
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#8
12-13-2002, 09:33 PM
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Since I'm working with '66 GTO heads, and '66 everything else for that matter, are '65 and '66 389 blocks the only years I can use? Or is any 389 block useable? Does it matter if it came out of a GTO , Catalina or something else?
Thanks Ken |
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#9
12-13-2002, 09:47 PM
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The '64 GTO and GP have a compatible 389 block (starter mounts to block), the other '64 389s and earlier 389s won't work in your '66 GTO. Any of the '65 and '66 389 blocks will work.
Let's go racing! www.outlawpontiacs.com/members/B-Man2.php www.outlawpontiacs.com/members/B-Man.php
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#10
12-13-2002, 10:03 PM
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When looking at a core block, what do I look for to tell if is is set up to have the starter mount to the block?
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#11
12-14-2002, 02:55 PM
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At back of the block on the drivers side,outside
the back lip of the oilpan there should be 2 holes tapped.That's where the starter bolts up. Eric |
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