| Author |
Message |
    
Paul Schuetz (Schuetz)
| | Posted on Friday, October 25, 2002 - 01:33 am: | 
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Seriously thinking about swapping a 4.6 in due to the fact that the block of my '91 RRC has developed a crack.
Anyone have any thoughts on the subject or should I stick to the stock 3.9?
Thanks,
Paul |
hendrik
| | Posted on Friday, October 25, 2002 - 01:44 am: |
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Why hesitating ;) . A new 4.6 block is probably cheaper than rebuilding any old block, and with a crack you might want to get a new block anyway.
Perhaps this helps:
http://www.ajmac.co.uk/rover_4.htm
http://www.rpiv8.com
http://www.rangerovers.net/rrupgrades.htm
regards,
hendrik
Main extra cost could be the ECU-rechipping. |
hendrik
| | Posted on Friday, October 25, 2002 - 01:47 am: |
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OK - and
http://www.gomog.com/allmorgan/allmorgan.html
for more general info. |
Paul Schuetz (Schuetz)
| | Posted on Friday, October 25, 2002 - 02:44 am: |
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Actually I have been talking to Eddie over at Land Rover Unlimited. I'm pretty much sold on it. I just though someone may have a different outlook on changing from the stock engine. It could definantly use the extra horsepower and torque. |
John Moore (Jmoore)
| | Posted on Friday, October 25, 2002 - 08:12 am: |
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Check this out at East Coast Rover.
http://www.eastcoastrover.com/106.html
If I was keeping my 88 RRC, I would do the same. There is a thread on the BBS about a RRC that had the 4.6 replacement and they tried to sell it on E-bay, no bids. So be sure to spend the $$$ because you love your rig, not because you think it will increase it's value.
-John
88RRC |
SL
| | Posted on Friday, October 25, 2002 - 09:46 am: |
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Forget the 4.6, get the 5.2. I hear that with the difflock engaged you can spin all four tires on tarmac. Find a supercharger for it, maybe some 4.10 gears and u might have the fastest 0-60 91' range in the world. FOrget wheeling, let's go to the drag strip. |
Rob Davison (Pokerob)
| | Posted on Friday, October 25, 2002 - 10:05 am: |
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go for it on the 4.6 !
rd |
Ali
| | Posted on Friday, October 25, 2002 - 01:34 pm: |
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I'm getting ready to do an engine build now with my current 3.9 top end and a fairly new 4.6 bottom end. The heads will get a valve job and other work as needed. The short block is getting all new main and con rod bearings, new cam and duplex timing set. Of course new comp head gasket and all new gaskets otherwise. Right now I'm getting my parts ordered from various places(bearings, gears, gaskets, etc) and hopefully sometime during this winter I can finish it all up. Hunting down the proper camshaft requires some stuyding of what's out there right now due to the avalibility of a good selection. |
Paul Schuetz (Schuetz)
| | Posted on Friday, October 25, 2002 - 02:11 pm: |
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I saw the other thread and that was somewhat of a concearn. But due to the fact that I plan on keeping it for a long time I wanted to see if in the long run this swap would devalue the car. Either way it really isn't that much of a cost difference between the new 3.9 and the 4.6. The 5.2 would be a little over kill for my taste.
Other than the engine problem, the truck is in almost perfect shape. And yes it does see a fair amount of offroad use from trips with SCLR to weekend boarding trips all winter long. Theh 3.9 kills me in the higher altitude, Tahoe and Mammoth, that's the main reason I want the extra power if I have to replace it anyway.
Thanks,
Paul Schuetz
SLO,Ca
'91 RRC |
John Moore (Jmoore)
| | Posted on Friday, October 25, 2002 - 05:31 pm: |
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Go for the 4.6, get a short block. I believe you can use most of anciliaries from your 3.9. I believe the oil pump and front cover are different.
No more falling behind mini-vans in mountain passes. Embarrasing!
-John |
Greg Hirst
| | Posted on Friday, October 25, 2002 - 06:24 pm: |
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I've read this thread with interest as I had decided that if the 3.9 in my '89 RRC ever blew up I would definitely upgrade to the 4.6. AB is currently advertising a NEW 4.6 shortblock for $3695. That's not bad even considering a new ECU and front cover/oilpump!
Greg H |
newsie
| | Posted on Friday, October 25, 2002 - 07:50 pm: |
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did someone forget to mention that the 3.9/4.2
engine's oil pump is driven by the distributor/
camshaft driven gear.(like a ford smallblock)
& the 4.0/4.6 engine has no provision for a distributor or drive setup, as its a DIS op sys!
the oil pump is crankshaft driven & a rotary gear set is used (just like the trans)for more flow.
ya gotta swap a lot more more stuff than ya think
to make it all work right.
the sellers LIED to get ya to buy.
Oh ; we have a 'kit' for that application.
KA-ch$$ing.
keep your rover as it was ment,
the guy that does the trail in the B.S.
(basically stock) rig & some drivin skill
will run everything a 5" sprung. 35" tired
& locked up car might try.
skill matters more than equipment!
(ask your next date!)
good car & no skills = not much.
" A driver must be aware of the conditions
of the track & car involved before
engaging the field of play"
my fav there is the 'field of play'!
can I call recess! |
Paul Schuetz (Schuetz)
| | Posted on Friday, October 25, 2002 - 08:09 pm: |
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I'm just going to let Land Rover Unlimited in Irvine handle the entire install. From the people in my club, they are the best around for this type of thing on the west coast. |
Rob Davison (Pokerob)
| | Posted on Friday, October 25, 2002 - 08:32 pm: |
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yeah, the 4.6 isn't for offroad as much as onroad i would think.
rd |
Greg Hirst (Gregh)
| | Posted on Saturday, October 26, 2002 - 12:43 am: |
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I believe that using the 4.2 cover allows the use of the distributor, fits the 4.6 block, and incorporates the crank driven oil pump as used in the 4.0/4.6 engine. With re-chipping the ECU ($650 from ECR?) it DOES add up to $$ but what the hell-you can't play without toy$!
Greg H |
Ali
| | Posted on Saturday, October 26, 2002 - 04:02 pm: |
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I believe you can still reuse everything including the dist/oil pump when going to the 4.6. You can simply re-use the 3.9 front cover, intake, heads, water pump, etc. The crankshaft will be a little longer but no matter, just use a spacer. Others have used a simple sprocket as a spacer. You can still have all V-belt driven ancilliary as before. The only obvious way one can tell of the 4.6 block is the compression # stamp and the heads of the Main bearing cross bolts poking out the side.
If you're using the proper camshaft for this combo, then there ought to be a noticeable improvement over the 3.9 engine. I'm not sure about the 14cux ECU and it's ability to handle more air and fuel requirements though. You might need to have the ECU rechipped and another fuel press regulator. |
Pugsly
| | Posted on Sunday, October 27, 2002 - 12:05 am: |
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There's a 4.6 for sale on ebay right now... http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1869660311&rd=1 |
Paul Schuetz (Schuetz)
| | Posted on Sunday, October 27, 2002 - 05:10 am: |
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I think I will still let the Boyz over at LRU do the whole gig. |
Larry Grubbs (Larryg)
| | Posted on Monday, October 28, 2002 - 07:01 pm: |
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Newsie,
I hope you are kidding about "Keep your car as it was meant". If not, you are an idiot.... Obviously coming from the Series world. There are soooo many problems with the stock truck that can be easily fixed.
And sure, maybe you know someone with a stock truck who can keep up with your buddy and his 35's. I have 35's and can run circles around any stock truck, anything.... Of course I do know how to drive.
Paul,
Put the 4.6 in if you plan to keep it. When my 3.9 blows I will definitely be upgrading to more power and possibly a Diesel. Maybe Land Rover Diesel, maybe not. But then again my truck doesn't have much stock left and I LOVE IT!
Sorry for all the emotion.. Ready to go home from work.
Larry |
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