If you don't have the hardened valve seats and exhaust
valves, you will have seat recession problems,
someday. With the low compression of the Rover
engine, it could take years, then again it could
happen next week. As long as you do not run the truck
for too long a time with burned seats and/or valves,
it shouldn't be a problem. Loss in performance as a
result of low compression or the need to adjust valves
constantly are an indication that recession is
happening. Personally, I wouldn't do an unleaded
conversion until valve recession became evident.
I think you have it backwards on the effects of larger
diameter tires. Larger diameter tires mean more
ground clearance which is absolutely essential for the
off roading that I do. So taller is better offroad.
Problem is finding a taller tire that is not so wide
as to sap the overwhelming power of the 2 1/4.
Interco may make a 34/9.50/15 but haven't heard of
anyone else that makes a 9.5" wide tire. BFG dropped
the size last year so doubt that you'd find any. They
replaced it with 33/10.50/15 which is noticably wider
though not nearly as wide as an 11.5" wide tire.
Think Ike Goss is running BFG MT's in 33/10.50/15 and
loves them. If you wanted to go with 16" inch rims,
BFG also makes 255/85/16 which is approximately the
size of the 33/10.50/15.
Taller tires mean effectively lower gearing. If you
live in the mountains, the 2 1/4 might not like
pulling such a tall tire on the road. The low range
gearing won't be greatly effected but the high range
might. I've got a set of 33's sitting in the garage
waiting for me to paint the rims. Will let you know
how they handle the hilly roads around here.
For all around driving, it's hard to beat the
235/85/16 or 7.50/16 size.
I'm running RM Parabolics with OME shocks on my 109
and like them. 3 leaf rears will let me load 2,000#s+
in the back and still not sag beyond horizontal. I've
got TI Consoles on my 88 and like them also.
Aloha
Peter O.
--- Rick Behning <behningr@ci.greeley.co.us> wrote:
>
> I am in the process of getting my 71' 88" IIA back
> on the road. I have it running and need to do some
> brake work to get her on the road, but....
> The PO was burning unleaded fuel, for about 10
> years, and I don't think, nor does he, that there
> was the unleaded valves conversion done. I saw the
> kit in the Rovers North book and am wondering what
> the implications of running the rover on unleaded
> are? If nothing has occured, catastrofically, in the
> past 10 years, then is there any concern? Despite
> the truck originally being sold in Canada, I still
> believe it is meant to run on regular leaded, I can
> not find this any more can I?
> So, do I need to save up for a new engine or what?
>
> I want to put new tires on the rover too. The
> 7.50x16 are about 31.5" in diameter, right? I have
> the standard 15" rims, so I was thinking I could go
> with 32"x15x11.5 but I don't want all the extra
> width. So I could go 33"x15x9.5 but I am wondering
> if the extra inch or so is going to greatly impact
> the performance offroad. I am thinking the added
> diameter will help the highway characteristics, and
> as this is going to be my daily driver that would
> help. But I don't want to go off the road and be
> helpless. I know a new engine would aleviate a lot
> of my concerns, but I can not afford that at this
> time. I am really leaning toward the 33's because I
> don't want the width of the 32's and I don't think I
> will be happy with the 31's. Please give me some
> feedback.
>
> The 33's will require parabolic springs, but that is
> not such a bad thing.
> Any opinions on which springs, shocks ar ethe best,
> most economical?
>
> Thanks for your help and I am gald to become a rover
> owner.
> Any of you in Colorado? I am up in Greeley.
>
>
>
> Rick Behning
> Staff Engineer, E.I.T.
> City Of Greeley
> 970.336.4145
> _______________________________________________
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> LRO@land-rover.team.net
> http://land-rover.team.net/mailman/listinfo/lro
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