Series 2.25 carbs
Daniel Collins
I think the Zenith 36IV in my IIA may be warping after only 4 months of
being fitted as the engine isn't running right and the mixture screw
doesn't appear to be doing anything. Before this I had a weber 34ICH
fitted, which I don't want to go back to as it had less power and was
crap in any weather even resembling the cold.
What other carbs can be fitted? Solex? SU HS6 maybe?
Badger
"Daniel Collins" <solemn...@solemnwarning.net> wrote in message
news:IS6Xm.68388$Bd7....@newsfe07.ams2...
If you google for ACR (Automotive Component Remanufacturing) you might find
what you are looking for re. SU carbs. I'm pretty sure that Roland (owner)
did a lot of work with tuning of the 2.25, part of which included a bolt-on
adaptor elbow for an HS6(?), if my memory serves me right.....
Badger.
Bob Hobden
"Badger" wrote
> "Daniel Collins" wrote
>> I think the Zenith 36IV in my IIA may be warping after only 4 months of
>> being fitted as the engine isn't running right and the mixture screw
>> doesn't appear to be doing anything. Before this I had a weber 34ICH
>> fitted, which I don't want to go back to as it had less power and was
>> crap in any weather even resembling the cold.
>>
>> What other carbs can be fitted? Solex? SU HS6 maybe?
>
> If you google for ACR (Automotive Component Remanufacturing) you might
> find what you are looking for re. SU carbs. I'm pretty sure that Roland
> (owner) did a lot of work with tuning of the 2.25, part of which included
> a bolt-on adaptor elbow for an HS6(?), if my memory serves me right.....
> Badger.
Whilst we are on about such things where the 2.25 or 2.5 petrol ever
(mechanically?) fuel injected in any application?
--
Regards
Bob Hobden
1986 90 Utility 2.5 petrol
Oily
"Bob Hobden" <Bo...@invalid.com> wrote in message
news:7p4kb8...@mid.individual.net...
>
>
> "Badger" wrote
> > "Daniel Collins" wrote
> >> I think the Zenith 36IV in my IIA may be warping after only 4 months of
> >> being fitted as the engine isn't running right and the mixture screw
> >> doesn't appear to be doing anything. Before this I had a weber 34ICH
> >> fitted, which I don't want to go back to as it had less power and was
> >> crap in any weather even resembling the cold.
> >>
> >> What other carbs can be fitted? Solex? SU HS6 maybe?
> >
> > If you google for ACR (Automotive Component Remanufacturing) you might
> > find what you are looking for re. SU carbs. I'm pretty sure that Roland
> > (owner) did a lot of work with tuning of the 2.25, part of which
included
> > a bolt-on adaptor elbow for an HS6(?), if my memory serves me right.....
> > Badger.
I've two of those elbows going spare.
> Whilst we are on about such things where the 2.25 or 2.5 petrol ever
> (mechanically?) fuel injected in any application?
>
Not as far as I know
G8KBV
Hi..
I did see a "home brew" (very well done too) petrol injection mod years
back at one of the Trentham Gardens show. I can't remember if it was a
4 or 6 pot, but it was the genuine LR engine, not a transplant.
From the little I can remember, the guy who did it, was a profesional
motor vehicle engineer, with all the right tools and knowledge etc, it
was not a bodge job in any way. He had manufactured his own inlet
manifold, and crank angle sensor system, but otherwise had used
"standard" (but not LR) parts. He was somewhat evasive about the
control system used, so I'm not sure if it was electronic (ECU) or
otherwise, probably something like the old Triumph system perhaps?
The result was "a lot more" power when wanted, but it had a thirst as a
result, and some comment about overheating. Well, if you force feed it
extra go juice, you have to expect that sort of thing.
Many other people have done "the usual boy racer" things to the
venerable 2 1/4 lump (porting, polishing, whizzy manifolds etc) with
predictable results. Very "peaky" power curve, but lots of it. I seem
to remember at least one competitive team used such a modd'ed engine in
one of the hill climb events, as it was in a lower class than the V8's,
but had similar power! Not sure of the overall results, or if it
completed the event. It was written up in one of the early 4x4 mags.
I've even heard of one supercharged 2 1/4 petrol, it didn't survive.
That is not the same as the well documented supercharged Diesels LR
themselves played with briefly.
Re the warping carbs. One of the mags a while ago had a full article as
to the reasons why it happens, and how to cure it. One friend who's
SIII suffered that, achieved a total fix as a result. Well worth
finding that article if you can. I think I have a scanned file of it
somwhere, but can't find it just now.
Regards.
Dave B.
Badger
"G8KBV" <g8...@nospam-uko2.co.uk> wrote in message
news:MPG.259816581...@news.demon.co.uk...
I've a feeling it might have been Roland Marlow from ACR, sounds like his
kind of thing, and I know he was doing a lot of tuning development work with
the 2.25, in conjunction with a bloke by the name of Ian Sykes
> The result was "a lot more" power when wanted, but it had a thirst as a
> result, and some comment about overheating. Well, if you force feed it
> extra go juice, you have to expect that sort of thing.
And you can't get power without burning fuel.
> Many other people have done "the usual boy racer" things to the
> venerable 2 1/4 lump (porting, polishing, whizzy manifolds etc) with
> predictable results. Very "peaky" power curve, but lots of it. I seem
> to remember at least one competitive team used such a modd'ed engine in
> one of the hill climb events, as it was in a lower class than the V8's,
> but had similar power! Not sure of the overall results, or if it
> completed the event. It was written up in one of the early 4x4 mags.
There are a few major issues though. Firstly, it ends up drinking more fuel
than the V8 to make the same bhp. Secondly, it has less torque across the
rev range. Thirdly, it's probably heavier - in fact, I'd put money on that!
> I've even heard of one supercharged 2 1/4 petrol, it didn't survive.
> That is not the same as the well documented supercharged Diesels LR
> themselves played with briefly.
I wonder if they used the stronger diesel crank and went for specialist
forged pistons...... If so, there's no reason for it to go bang really, as
the combustion pressures would still be lower than the disiesel variant.
> Re the warping carbs. One of the mags a while ago had a full article as
> to the reasons why it happens, and how to cure it. One friend who's
> SIII suffered that, achieved a total fix as a result. Well worth
> finding that article if you can. I think I have a scanned file of it
> somwhere, but can't find it just now.
I always put it down to cheap production methods with low quality alloys
myself......
Badger.
G8KBV
brian...@btinternet.com says...
Indeed....
Dunno about using the Diesel crank that would make sence, and be
virtualy unbustable, or what pistons were used, but they were talking
about some internal "changes", it was not a just bolt it on job. ???
Agreed about the weight thing, the all alloy V8's are nice in that
respect, as well as the sound they make :-)
Warping carbs, and production methods, well, probably. I seem to recall
an engineering friend calling that material "$hit mettal" For very good
reasons I suspect. (Mazac? An Aly Magnesium alloy I think?)
Cheers.
Dave B.
Andrew Cleland
route). It was a nice kit - SU HF6, inlet manifold, cylinder head (with
unleaded seats) and a new silencer. Sounded good, went reasonably well
(although nowhere near V8 well) and the HF6 is a joy to tune after the
34ICH that was on there.
AndyC.