8/29/00
John,
Excuse my ignorance, but is this "interim" block you speak of a 3.9
or a 4.0? My familiarity is mostly with Buick/Olds blocks and only a
little bit with Rovers.
In general, what are the specification and feature differences
between 3.9 s and 4.0 s? Are they the same bore and stroke dimensions?
This is one little part of the Rover puzzle I would like to learn more
about.
T I A.
Regards,
Dave Kernberger
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>Greg, Its an interim block, probably a '94. Takes the small journal
>crank. The
>front cover off of that block is especially interesting, in that it has
>the new
>style oil pump that is driven off the crank, but will take a distributor. Are
>you interested in selling? John
>
>Gregory Williams wrote:
>
>> Since we're on the subject of blocks, I thought I might launch a query. I
>> picked up a 3.9 block in a deal last year. The gent that sold it to me said
>> it was a 4.0. I inspected it pretty closely and found that it had the
>> beefed up webbing of the 4.0/4.6 and the thick main caps as well. It also
>> had bosses along the side of the block for crossbolts but they were'nt
>> drilled and tapped for them. However, it had 5 bolt holes around each
>> cylinder, 3.9 style rods and 2.3" mains. What is this? A 3.9 1/2?
>>
>> Greg
>>
>> -----Original Message-----
>> From: Ric Smith [mailto:rsmith@coppercom.com]
>> Sent: Monday, August 28, 2000 8:26 PM
>> To: 'Jan Ben'
>> Cc: 'buick-rover-v8@autox.team.net'
>> Subject: Isky reverse rotation cams
>>
>> Jan, are you spinning the engine backwards like I am? Obviously reverse
>> rotation cams don't help a normal motor. Isky does currently stock normal
>> rotation cams for the 3.5 in about 4 obsolete grinds, mostly on 110 centers.
>> I had them do a custom grind for me but it was too peaky and the horsepower
>> peak wasn't that good either so I advise conservative grinds for better
>> torque. I'd check out RPI in UK for street cams for Rover trucks. Try
>> www.rpiv8.com. It's good reading all over their site.
>>
>> I shopped for a 4.6 block for 3 years before I found a shop with just a
>> block. They had dropped a nut down the intake and trashed one cyl liner. I
>> paid just under a grand for the block with one hole resleeved and main caps.
>> No crank, no top end, nothing else. I still need a windage tray for it and
>> don't want to pay dealer prices. Any suggestions? ric.
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