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We've seen how to configure the header title already, but let's go over that again before moving on to some other options — repetition is key to learning!
#Setting the header title
Snapshot 3 4 0 – Screenshots With Various Options Download
So the various options that are scattered across our best Android screenshot apps roster will surely aid you in taking screenshots of just about anything that pops up onscreen.
- ISnapshot 3.4.0 – Screenshots with various options. ISnapshot (was Screen Capture X) is a fast, user-friendly and efficient utilities for screenshot.
- NMac Ked iSnapshot (was Screen Capture X) is a fast, user-friendly and efficient utilities for screenshot. ISnapshot Features: Supports three capture modes(Full.
A Screen component accepts
header titleoptions
prop which is either an object or a function that returns an object, that contains various configuration options. The one we use for the header title is title
, as shown in the following example.#Using params in the title
In order to use params in the title, we need to make
params in titleoptions
prop for the screen a function that returns a configuration object. It might be tempting to try to use this.props
inside of options
, but because it is defined before the component is rendered, this
does not refer to an instance of the component and therefore no props are available. Instead, if we make options
a function then React Navigation will call it with an object containing { navigation, route }
- in this case, all we care about is route
, which is the same object that is passed to your screen props as route
prop. You may recall that we can get the params through route.params
, and so we do this below to extract a param and use it as a title.The argument that is passed in to the
options
function is an object with the following properties:navigation
- The navigation prop for the screen.route
- The route prop for the screen
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We only needed the
route
prop in the above example but you may in some cases want to use navigation
as well.#Updating options
with setOptions
It's often necessary to update the
updating navigation optionsoptions
configuration for the active screen from the mounted screen component itself. We can do this using navigation.setOptions
#Adjusting header styles
There are three key properties to use when customizing the style of your header:
headerStyle
, headerTintColor
, and headerTitleStyle
.headerStyle
: a style object that will be applied to theView
that wraps the header. If you setbackgroundColor
on it, that will be the color of your header.headerTintColor
: the back button and title both use this property as their color. In the example below, we set the tint color to white (#fff
) so the back button and the header title would be white.headerTitleStyle
: if we want to customize thefontFamily
,fontWeight
and otherText
style properties for the title, we can use this to do it.
Smartmemorycleaner 2 3 0 – automatic memory cleaner. There are a couple of things to notice here:
- On iOS, the status bar text and icons are black, and this doesn't look great over a dark-colored background. We won't discuss it here, but you should be sure to configure the status bar to fit with your screen colors as described in the status bar guide.
- The configuration we set only applies to the home screen; when we navigate to the details screen, the default styles are back. We'll look at how to share
options
between screens now.
#Sharing common options
across screens
It is common to want to configure the header in a similar way across many screens. For example, your company brand color might be red and so you want the header background color to be red and tint color to be white. Conveniently, these are the colors we're using in our running example, and you'll notice that when you navigate to the
sharing header stylesDetailsScreen
the colors go back to the defaults. Wouldn't it be awful if we had to copy the options
header style properties from HomeScreen
to DetailsScreen
, and for every single screen component we use in our app? Thankfully, we do not. We can instead move the configuration up to the stack navigator under the prop screenOptions
.Now, any screen that belongs to the
StackScreen
will have our wonderful branded styles. Surely though, there must be a way to override these options if we need to?![With With](https://imgvol.cdn.lcpdfr.com/screenshots/monthly_2019_07/Z3_Non_Matrix.thumb.png.5c67c4f912843497dca7da8cd076bca1.png)
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#Replacing the title with a custom component
Sometimes you need more control than just changing the text and styles of your title -- for example, you may want to render an image in place of the title, or make the title into a button. In these cases you can completely override the component used for the title and provide your own.
custom header title componentYou might be wondering, why
headerTitle
when we provide a component and not title
, like before? The reason is that headerTitle
is a property that is specific to a stack navigator, the headerTitle
defaults to a Text
component that displays the title
.#Additional configuration
You can read the full list of available
options
for screens inside of a stack navigator in the createStackNavigator
reference.#Summary
- You can customize the header inside of the
options
prop of your screen components. Read the full list of options in the API reference. - The
options
prop can be an object or a function. When it is a function, it is provided with an object with thenavigation
androute
prop. - You can also specify shared
screenOptions
in the stack navigator configuration when you initialize it. The prop takes precedence over that configuration.
by Lorne Goldman
What is the difference between a 3.9 or 4.0 or 4.6 litre engine? Both have a bore of 94.0 mm and a stroke of 71.1 mm.
There seems to be no difference in capacity at all!
There seems to be no difference in capacity at all!
The differences are:
- The 3.9 block has provisions like the 4.0/4.6 litre for the very welcome cross-bolts but they have not been drilled.
- The 3.9, 4.0 and the 4.6 has the smaller main journals than the 3.5.
- The 4.0/4.6 crank has a longer nose.
- The 3.9 has the concentric oil pump but coupled with standard distributor. The 4.0/4.6s has a distributorless system and thus no hole for a distributor. However, the Morgan 4.6s sold until 2000 has a 3.9 top end, with a distributor, the earlier fuelling system and a 3.9 fuel map.
- The 4.0/4.6s use longer rods, lighter and shorter pistons.
- The 3.9 had the 14CUX 'hotwire' fuel injection. The 4.0 has the Lucas 'GEMS' engine management system (latest see Bosch 5.2.1 Motronic) However, the Morgan 4.6s sold until 2000 has a 3.9 top end, with a distributor, the earlier fuelling system and a 3.9 fuel map.
- Because of the way the fueling and ignition is set up, the standard LR 4.0 has knock sensors and the 3.9 does not. However, the MMC systemremoves the knock sesnors, forcing the ignition to 'fly blind'.
- the 4.0 puts out 186.4 bhp and the 3.9 puts out 190.3 bhp. Because of its inadequate fuelling, the Morgan 4.6s (overseas 4.6 have an unknown output).
If you know of other differences please send them in to keep the page current.
BUICK 215/ROVER 3.5 AND THE LAND ROVER 4.0/4.6 ENGINES
DIFFERENCES
1. | The 4.0/4.6 crankshafts are also longer to drive the new oil pump |
2. | A new connecting rod design was used for the 4.0/4.6. They are made from forged steel and now have balance pads on both the small and big ends; the screw-in bolts retaining the caps are of a more robust design and are manufactured to extremely fine tolerances. The 4.0-litre engine uses a rod 1 55.2 mm in length, and the 4.6-litre is 149.7 mm with a55.5 mm big end bearing diameter, the older version having a 50.8 mm big end bearing. The increase in length was done to reduce the angularity of the rods in the engine, thus reducing vibration. The small end size has been increased from 22.2 mm to 24mm. |
3. | The pistons are also new and are a common design between the 4.0 and 4.6-litre engines. The capacity of the bowl in the piston crown varies slightly between the two engines (4.0-litre, 13.23 ccl4. 6-litrr, 22.29 cc) to determine the compression ratio. To maintain equality of material thickness on the piston crown they are different castings. Having said that, the compression ratios are the same for both engines --9.35:1 although lower 8.2:1 compression pistons are available. The original 3.5/3.9-litre engines have pistons 80.9 mm long overall, with a compression height (or crown height) of 49.5 mm, while the longer stroke 4.2-litre engine uses a piston 72.85 mm long with a compression height of 45 mm. |
4. | The 4.0/4.6-litre engines have a shorter piston of 66.6 mm, with a compression height of only 35.9 mm. |
5. | The 4.04.6 gudgeon (or wrist) pin diameters have been increased and they also have a gudgeon pin offset. The 4.2-litre engine was the first production Rover V8 to use this feature, but on the 4.0/4 6 litre engines it has been increased from the 0.55 mm of the 4.2-litre to 0.60 mm. The reason for this offset is to produce a slight side loading on the piston at TDC, thus eliminating piston slap all part of the infinite attention to design detail by the Rover engineers in their quest for refinement. |
6. | The 4.0/4.6 cylinder blocks have been made significantly stronger by the addition of stiffening ribs (taken from the Sd1 Vitesse) in key areas (along the block sides near the main bearing webs, for instance) and, more importantly, both 4.0 and 4.6 litre blocks now have cross-bolted main bearing caps. Of course Rover have produced cross-bolted blocks before, but they were special items and expensive, one of the reasons being that the main caps had to be individually ground to match the block. The new blocks have this feature productionised, although they are now a press fit in the block. The cap material has also been upgraded from grey to SG iron. |
7. | The interior profile of the 4.0/4.6 block has been altered to make room for the redesigned crankshaft with its bigger bearings and bigger counterweights. The cylinder liners are 5 mm shorter and the oil pick-up from the sump no longer fits into the block casting, from where the oil made its way to the pump via a drilled gallery; the pick-up on the new engine. |
8. | There are two new crankshafts, one of 71 mm stroke for the 4.0-litre and one of 82 mm for the 4.6-litre version. |
9. | The main bearing size has gone up from 58.4 mm to 63.5 mm and the counterweights are larger, although of the same number as before. These new crankshafts will not fit into older engines because there is insufficient room for the bigger counterweight to rotate inside the block. The stroke of the 4.0-litre crank is identical to the old 3.9-litre, as is the cylinder bore of 94 mm, so the capacity of these two engines is the same. |
Engine | Bore x Stroke | Capacity |
Buick 215/Rover 3.5 | 88.9mm x 71mm (3.5' x 2.8') | 3500cc |
Rover 3.9/Rover Crossbolted 4.0 | 94mm x 71mm (3.7' x 2.8') | 3950cc |
Rover 4.2 | 94mm x 77mm (3.7' x 3.0') | 4278cc |
Leyland Australia P76 4.4 | 88.9mm x 88.9mm (3.5' x 3.5') | 4416cc |
Rover Crossbolted 4.6 | 94mm x 82mm (3.7' x 3.2') | 4554cc |
Displacement | Bore | Stroke | Main Brg | Rod Big End Brg | Wrist Pin | Rod C/L to C/L |
215CI BOP | 3.50 | 2.8000 | 2.3000 | 2.0 | .8750 | 5.660 |
300CI Buick | 3.75 | 3.3600 | 2.5000 | 2.0 | .9390 | 5.960 |
When using the Ford 255 Ford V8 or 2.8L Ford V6 (or similar bore size) pistons, you want 3 11/16' x 3/32' sleeves. For 305 Chevy pistons (dished LG4), you want 3.75' x 3/32' sleeves. For 2.3L Ford turbo pistons (3.78' bore), use the same sleeves bored 0.030 over.
A NAS 4.0 Anomoly (1998-2002 models)
Experience seems to show that, when in doubt, the US Plus 8s (4.0 1998-2002) NAS SAGEM fueling system ECU (computer) will revert to a default setting. Like most default setting, the car will be protected for a presumably a short period by running very rich. There will be a smell from the cats of rotten eggs and the car will react poorly with a bad idle and sluggish performance.
Many things can produce this state..a prolonged non-use of the car.a lack of power to the ECU or overfilling the petrol tank.
In such a case with these symptoms, the ECU must be reprogrammed to run properly again. TRhis is a simple matter if you know the setting and you have access to a LR dealer or specialsit with wither TESTBOOK (the LR diagnostic and prgramming serrvice unit) or Rovercom, an aftermarket item that does the same thing.
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Unlike other LR units, the Morgan is reprogrammable and you will have to tell the experienced mechanic with the diagnostic unit mentioned to use the disk for '1997 Range Rover GEMS 4.0L UK Manual Type 1 ID 9660'. Once re-programmed to that specification, the car should run perfectly again.
The Story of the Morgan 4.6s February 2, 2018
The Story of the Morgan 4.6s February 2, 2018
I was just contacted by an UK mogger I like very much. Puzzled, he has asked a question that I haven't dealt with in years. The Morgan cogniescenti has largely withdrawn from view in the last decade and much has been forgotten. People should know as much as is possible about their beloved cars.
His question arose from confusion on Morgan blocks numbers and the Morgan 4.6s.This is very understandable as for a period (1997-2000) Morgan simultaneously produced Plus 8s with two different generations of original LR V8 blocks/heads and fueling systems (the then already obsolete 3.9s with Hotwire fueling for the UK and the more advanced 4.0 blocks with GEMS fueling for overseas distribution). This ended in 2000 when Morgan went to GEMS for all Plus 8s.
There were many reasons for this given by the company, few of them credible. For example, at the time the UK market was told that the later GEMS system or later the Land Rover Bosch Motronic system 'would not fit under the Morgan bonnet!', which didn't make sense considering the hundreds of GEMS Plus 8s supplied overseas. The simple truth, I suspect, was that GEMS and MOTRONIC were more expensive for Morgan than the older Hitachi Hotwire systems and British law allowed the local sale of 3.9s until 2000. That being said, engine fiddlers like me and top tuners prefer the Hotwire for a number of reasons. It certainly allows for easier upgrades and owner intervention than the later GEMS! (Though no Morgan EFI system is as easy to take care of, adapt and part source than the L-Jetronics (flappers).
But another problem appeared for Morgan.
By 1996, news had come of the production of the anticipated 4.6 version of the venerable Buick/ Rover/LR blocks. Every fan of Land Rover and the other marques using the block were excited. The 4.2, never used in a Factory Plus 8, had largely been a disappointment and the 4.0 and 4.6 went much further, with cross-bolting and other features. And this was before the infamous plague of Land Rover V8 block cracking and slipped liners had begun in earnest. (With the low Morgan weight, this was not a problem for us.)
So Morgan had a goodly number of 4.6s on order in anticipation, at a premium price. Even Peter Morgan put his order in for one to be his personal car, AB16! It was also to have the newer 'wide body' with the new Superform wings (much wider than anything contemplated in prior Plus 8 history). Problem is, everyone wanted the 4.6 in their truck when it appeared and Land Rover couldn't deliver to Morgan. I believem (unconfirmed) that the problem was the scarcity of the new GEMS fueling system, not the block.
But Morgan came up with a solution to save those sales. They went to John Eales. John should need no introduction to Plus 8ers.He deals in race preparation and supply of LR engines. Morgan asked Eales to supply new 4.6 blocks, modified and fit with 3.9 Hotwire top ends and fueling systems. (With a bit of modification parts, all blocks from 1976 can be retro-fit with earlier or later systems.) So now they had bigger 4.6 blocks fit with earlier fueling systems made for 3.9s!
Here is the Morgan announcement that was sent to me. It is confusing and inaccurate, indicating the state of the company management technological understanding at the time. I ask the reader to overlook these errors.
Morgan Motor Company: June 1997 Dealer Notice: 'As it has not been possible to obtain the current Range Rover 4.6 litre engine, due to supply problems with Rover and because of the modifications required for installation, we have arranged for a special engine to be prepared. This uses the current 3.9 litre engine, but built using the standard 4.6 litre block. This involves stripping a new engine, removing the block, specially modifying a 4.6 litre block to accept the front cover, and rebuilding the engine. This produces a special unit using largely standard Rover parts. The distributor set-up is largely the same as 3.9, as is the camshaft and ECU. The block is cross bolted for strength. The crank, pistons and block are standard Range Rover 4.6'. |
Of course, logic dictates that one cannot get much more horsepower by providing the same amount of fuel to a larger bore engine, EVERYTHING ELSE being equal. In fact, the combination MUST run lean and hot as you are feeding a larger combustion chamber with the same amount of fuel! And the later 3.9 Hotwires already run too lean as stock! In fact, if you examine the figures given by Morgan, they show a mere 1.8% increase in bhp over the 3.9L blockof the day albeit the 4.6 had a 2500 GBP price premium which sadly produce bragging rights only in its Morgan version. More than twenty years ago, John Eales told me he tried hard to get Morgan to allow him to create or provide them with a more appropriate chip/eprom (aka fuel map) which would release the extra power eveyone assumed would result from the bigger block and keep the motor problem free. Land Rover, with merely their stock 4.6 fueling and a truck 4x4 cam produces 30 more bhp (almost 20%!) with the same engine. However, a more appropriate chip was refused by Morgan, either for reasons of economy or perhaps worries about a need to re-test the engine for emissions. In any event, it was never done. Sadly, this also came at time when the fueling was already as lean as the fuel map of the 3.9 could be made to provide. This was why LR was transitioning to the GEMS and then MOTRONICS at the time. Additionally, owners would soon compound the lean fuel mixture with K&N air filters and performance exhaust systems. The lean mixture is unhealthy for the engine.
WATCHPOINT: The Morgan 4.6 fuel map:I have always advised the Hotwire 4.6 owners who contact me to fit a Tornado chip and they are universally thrilled, not simply with the added power and torque but with the new experience of running cool. Sadly, by the time they get to me, they have all often spent a fortune trying to improve the cooling systems. I am am a fan (pun!) of better cooling for Plus 8 but trying to fix a fueling issue with better cooling is analogous to using a huge bandaid in hope of curing double pneumonia. As always, I have NO connection with Tornado systems or any supplier mentioned. |
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WATCHPOINT: 4.6 Potential Power By way of example only, I note to you that two of my three Morgan Plus 8s have sported new 4.6s which I have adapted to my original EFI (Bosch L-Jetronic) system. One was created with a goal of maximum road-reliable power for North America and the other with a desire to have a thoroughly reliable tourer for Eueopean backroads and the uncertainty of their fuel quality. I have rolling road dyno'ed the North American version four times and the European car once. I use rolling dynometers as a the best tuning device.and NOT for ego boosting. To my mind it is the ONLY place to test the veracity of add-ons. The North American car was run on 94+ octane (aka 100 octane in the UK), easily findable in Canada. hThe L-Jetronic (Flapper) system is the least sophisticated EFI system, and the compensation for that is the fact that it is the most user friendly, re-tunable in minutes. The dyno tests show a maximum bhp and torque at 307 bhp and over 300 for torque. In fact, unless I am racing, I detune the car for greater reliability to 292 bhp (without much effect of torque. However, this is almost 50% greater performance than the MMC version of the 4.6!! The other version of the 4.6 I used in Europe used a 4.6 with a lower compression. No effect on torque but a BIG loss in bhp from the CDN car. (The trade-off made it immune to lousy petrol found in Continental or backwoods Tennessee rural filling stations.) It dynoed at 254 bhp (using the rolling road dyno in Cheltenham in the Cotswolds. More than 25% more power than the MMC's 4.6s that uses a higher compression engine! Additionally, these engines run healthier and will last much longer with far fewer problems. The Tornado fuel map will NOT achieve the first figures. But they will make it to the second set produced by my UK car. Sadly, Morgan forums are now (2018) nowhere what they once were and much of the hard-earned lore is no longer common knowledge. One must had to search to find it again. Please forgive me. I am not suggesting the joyful hands-on Morgan owner will not return to the forefront one day. They have merely retreated from the internet, faced by the new owner crowd led by self-advertisers and gadgeteers. I blame no one. The community has been led by the Factory and it no longer has any petrol heads in a decision making position. The current model line-up is no longer susceptible to easy home garagiste interaction. So there is not much to discuss on today's forums but expensive ways to remedy the appalling lack of maintenance, along with paint colours, upholstery and such things as ridiculously priced spring gaiters. :( It seems only a short time ago when moggers distinguished themselves from other vintage car communities by helping rather than preying on each other. However, it is a new world. |
The MMC 4.6s (aside from some overseas 4.6 GEMS units) overheat. Many owners, internet savvy and former eMog adherents have addressed the issue. Owners adopt the new they-all-do-that attitude of the current Morgan community. :(
Jixipix simply hdr 3 2 12 review. I have a number of Buick, Rover and Land Rover V8s in spares. I enjoy them all, as they all give the Plus 8 a different personality. But after more tha 225,000 miles, two continents and more than 25 years, I unabashedly admit to loving the 4.6 variants more than all others in Plus 8 history. They can be made infinitely owner friendly, with the best Morgan touring engine ever as they are super flexible. Roadside mechanics are familar with them on all continents. The mistakes Morgan made with their UK 4.6s are tragic. However, they are easy to sort. Sadly, the current community is no longer as mechanically adept as it was and who can recognize inadequate fueling without an exhaust analysis and a basis for comparison? Owners are unaware of the issues and all good drivers unconciously adapt their driving to what they got. The increased capacity indicates that the 4.6 MUST be more powerful so everyone assumes it. Yet it is merely another problem Morgan waiting for the right owner to ask the right questions and act upon the right answers. It would be a shock for these owners to see what that engine can really do.assuming it is undamaged after a decade of incorrect fueling.
These cars are easy enough to recognize. UK 4.6s, and their block numbers do not indicate a made-for-Morgan origin. John (Eales) would have their source and numbers but it would be unkind to place him in a conflict that is not of his making. He is a good guy.
MATCHING SENDORS TO GAUGES ELECTRONICALLY
by Lorne Goldman and Tim Waller
1. Matching Sendors to Gauges Electronically 1(Spyda)
2. Matching Sendors to Gauges Electronically 2(Speedway)
3.Matching Sendors to Gauges Electronically 3(Tanks MeterMatch)
by Lorne Goldman and Tim Waller
1. Matching Sendors to Gauges Electronically 1(Spyda)
2. Matching Sendors to Gauges Electronically 2(Speedway)
3.Matching Sendors to Gauges Electronically 3(Tanks MeterMatch)
WATCHPOINT: An astute Morgan mate of mine pointed out that these devices are made for cars that have instruments that function with ohm signal senders rather than the older gauges on very early cars that function with a varying voltage signal. Confirm what type of gauge you have if you have a pre-1970's Morgan |