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Questions you always wanted to ask.


trunk-rattlin

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In all honesty, the meetings and gatherings have had an absolutely shit turn out. I've (and I think the others have) had a good time, but we really have needed more people.

My question:

How does an SU carb work?

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Guest escort_boy

i know for a nisssan it is fairly costly. depends on the engine and shit but if u were to use the same engine it works out to be bout 1500 or there abouts i think. jsut depends if u have to replace much of the interior cause if u do it can be more. that is not including labour

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My question

How much would a manual conversion for a fairly common car cost on average? I know, I know, how long is a piece of string, but I just want an average idea.

A few hours if you've got all the stuff and the right tools ;)

Stuff=

Flywheel,

Clutch,

Pressure Plate,

Spigot Bushing,

Pedals,

Master & Slave Cylinders,

Transmission,

Thrust bearing.

Of course, depending on the car you may also need a different driveshaft & tranny mount, speedo cog etc.

Good thing about Datsun's is a lot of the stuff swaps over several models. Not too sure on Mixofshitti's though.

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SU's

SU's have a needle that is attatched to a piston that moves up and down.

the needle is tapered, therefore you get a different amount of fuel for the different heights of the piston.

the accelerator pedal does NOT move the piston, it opens a buterfly, as per normal, that results in a change in potential air flow.

the dome on top has a hole going through to the other side of the piston.

so.....

the air that has gone past the piston will be at a lower pressure than the air on the other side. the lower pressure air fills the top dome, and therefore the piston will lift up, similar principal to a wing ( lower pressure on the top of something than the bottom will make it want to lift up )

then, the higher the piston goes, the more fuel you get...also the more air that can go past.

The good thing about them is that they will automatically enrich the mixture when the engine has changing load conditions, as the piston can move up or down without influence of the acc pedal.

therefore you have a carb that can get quite close to giving you the optimal air/fuel ratio in almost any condition.

a standard carb has a jet that is a set size. this size has to compensate so that it can operate well in all conditions, so it's not the best.

hope some of that made sense to you....lol...I'm not the best at explaining things!

Manual gearbox upgrade

if you do all the work yourself...it should not cost you much at all.

you will need to ( assuming your car manufacturer was kind enough to bring your car out in manual and auto with the same engine )

put in the new g/box

possibly new gearbox x-member

possibly driveshafts mods

a clutch pedal

clutch master and slave system and lines

a flywheel, clutch e.t.c

cut a hole in the tunell for the gearstick

and of course hydraulic fluid

and thats about it...( I hope...lol )

the cost of all these bits will vary greatly depending on how popular the engine you are trying to convert is.

eg a Datsun L16 auto - L16 manual

would prob cost about $200 inc all parts ( not new parts tho )

( because L-series parts ( standard datsun engine in a lot of models ) are everywhere and a lot of people are upgrading to later model engines )

whereas

my CA18DET auto - CA18DET manual is going to cost a lot more.

the gearbox alone is going to cost me about $400-500! ( I'm still looking for one....HINT HINT )

reason for higher costs is obviously because more people want this engine/g-box....and there were a lot of auto Silvias made.

still shouldn't cost $1500 tho :shock:

maybe if you paid someone else to do it for you.

[/b]

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Cheers. I know the Mitsy celeste came manual with the 1600 definately. You need to get it all certed correct? I can source a g/box easy as but all the other stuff is different. I'm pretty sure the Lancers share the same floor pan, so would that generally mean the same crap like clutch and stuff?

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I know that all Nissans/Datsuns are easy to swap things over...

I mean how great is it that a SR20DET ALMOST BOLTS into a Datsun 1600?!!! 8)

anyway....If other manufacture's didn't make it so you could make a auto into a manual quickly and easy, then they should be burned down!

It should be very easy, and things from the manual car should pretty much just bolt accross ( some cutting and drilling WILL be needed though )

If you do the swap nice and tidy, and it doesn't say Auto anywhere on the car or rego....then no wof man will ever know the difference let alone a cop. So do it clean, and you won't have to cert it.

you prob don't have to anyway....but I'm not sure

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Guest escort_boy

this is more relating to new school but you have a mitsi glalant VR4, wats hte VR4 stand for apart from being hte turbo version

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dunno what they stand for....but...

all of those are webbers.

DCOE is a sidedraft twin choke carb

IDA is a downdraft twin choke carb

IDA is a downdraft twin choke carb

ICH - havn't heard of them bofore?

DCOE......hmmm Dual Choke O.. E...? maybe?

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what is the difference between the mk4 & 5 cortinas... they are both dirty corts.... :D

but really ..i shte mk4 a bit more rounded like the line under the side windows has more of a coke bottle effect? and the mk5 is almost straight?

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anyone got any pics of the differences?

just do a search and compare what you can see.

The mk4 has generally got chrome bumpers that don't wrap around the sides, while the mk5 has black ones with rubber/plastic extensions that do.

Mk4 front indicators are vertical ones beside the headlight which do not wrap around the front of the guard. I can't remember completely but I thought the mk5 had ones more like the mk3 that came around the front of the guard a little.

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