ca18det questions

[Paddy]

Got a few q's about the ca18det motors ( my engine and gear box will start to be unwell soon ) and i'm looking at what to do. I'm leaning towards the ca18det because of the easiness of the install.

So here are the q's

1 - does the ca18det use the same gearbox as the ca18de,and if u buy the engine ( a fwd one) will the gearbox suit the exa?

2- anyone no of a good mob to buy ca18det off ( i want to do as little work to the motor as possible, aside from beefing it up), so i'd be after a non dodgy engine mob.I won't be buying now, but fairly soon.

3- and what mod's and improvemants would people do to improve the power,and reliability, because if i'm going to all the trouble of upgradeing, i might as well make it bullet proof and fast


:kit2:

Also any other advise would be good, i'm not doing it now, but the way the motor is it'd be within a year or so, and any other little pointers would be good to have. Cheers all.

[exa18]

You need the motor out of a Nissan Bluebird Attessa 4WD, definitely go for the one with the top mounted intercooler, it has more power, and will be newer, and most probably have less kilometres on it too.

Mate this to your original 1.8lt Exa gearbox (easy bolt up, no modification what so ever), I would definitely advise a clutch upgrade while it's all out, dont do it on the cheap, you'll pay more in the end if you do by having to re-do it in the future. The motor and gearbox should then bolt straight in to your engine bay with slight modifications needing to be made to the front engine mount, and possibly to the cross member also.

You need to decide whether you'll be using the standard nissan ecu for the motor, or if you want to go to an aftermarket computer. Standard puter is fine, but for horsies sake, go an aftermarket system, I went with EMS because there is no need to run an air-flow meter, which makes the whole system much easier to set up. And in the case of future modifications, all you do is re-tune the computer to run the newer setup.


That's about it! As to where to actually get an engine, try any jap import place.

[EXR8D]

you will be very lucky to find a Fwd CA18det.

while the engine is out, chage all teh things you can get to, timing belt, waterpump, thermostat, you might even want to change the head gasket depening how much time you want to spend on it.

gearbox will bolt up, but dont know how long it will last, mine only lasted for a few weeks.

cv joints will wear out faster too.

and definately upgrade the clutch.

[TRB.O8U]

AND ALL RUBBER HOSES !!!!!!!!!!!
Every single one, because the one you don't change is the one
that will split and leak and it will be the one where you will nearly need to remove the motor to change..

[tru]

lol especialy the one between the starter and the intake manifold..!! took me something like 2hours to change on my ca16de :)

[TTriX]

exr8d...
which clutch did you upgrade to as i need a new one and the one i have wont take the ponies???
T

[EXR8D]

its a 4 puck, solid centre, double diaphram, fingerless, brass button clutch. awsome clamping power never sliped once.

[WhitePulsar]

I have a question.

on a turbo engine, the piping goes into the engine passing across the throttle valve (?) into the intake plenum. does a turbo engine have this butterfly valve?
does a turbo constantly spin providing pressure?
if so, is this what a BOV is for?

would the same answers to these questions apply to any forced induction intake setup?

[TTriX]

exr8d...
what company was it from and possibly if it wasnt for the exa what car was it from?
thanx
T

[Hairball]

To white pulsar- re: I have a question.

1 on a turbo engine, the piping goes into the engine passing across the throttle valve (?) into the intake plenum. does a turbo engine have this butterfly valve? - yes
2 does a turbo constantly spin providing pressure? no, I beleive this is only the case in superhchargers. they are belt driven like your alternator. The turbo is spun up by exhaust gasses exiting the engine, so it only comes on boost when the manifold 'vacume' comes up ABOVE 0kpa into the positive to become pressure (not vacume anymore) this is why turbo's usually come 'on boost' at around 2,500 rpm (and higher) because you have to wait till the exhaust gasses spin the turbo fast enough to suck/push the air in.
3 if so, is this what a BOV is for?
BOV or gas recirculation valve originally was made to lengthen the life span of the turbo and help with turbo lag.
ok lets pretend you dont have a BOV and go for a 'drive'.... you come up thru first gear hit boost and are about to change to second gear, what happens? put your foot on the clutch and let off the accelerator. taking the foot aff the accel. closes the throttle 'butterfly' to the plenum chamber and stops all the air coming in.the pressuse in the intake rises and the turbo spins right down to next-to-nothing due to all the air AFTER the turbo stopping dead.
you drop to second and let ya foot off the clutch and hitt the accel. again. Once again you have to wait till the exhaust gasses spin up the turbo before coming back onto boost (where the power is :) )
Lets take the same drive with a BOV

you come up thru first gear hit boost and are about to change to second gear, put your foot on the clutch and let off the accelerator. taking the foot aff the accel. closes the throttle 'butterfly' to the plenum chamber and stops all the air coming in. the pressure inside the intake pipe rises to the point that the BOV is set at and the bov releases the pressure (to the atmosphere or back to the intake b4 the turbo) and the turbo keeps happily spinning along at the near on the same speed.you change to second and let ya foot off the clutch and hitt the accel. again. this time you dont wait till the exhaust gasses spin up the turbo cause its already spinning off its nut when you open the throttle to the plenum chamber! and it comes on boost almost straight away :)

Now I'm no expert, but this is how i understand it.
also, i might add i know nothing about superchargers, so if that or any other details above are wrong. Please post a correction. :) i dont like giving bad advise.
besides its 1/4 to 4 in the morning, im tired, and im going to bed now :P


I hope this helps a little.

[WhitePulsar]

Yes is does actually, thankyou very much.
one more question though.

as the exaust exits, it spins the turbo? so then even at idle, wouldn't the turbo be spinning a little bit? or is there some sort of clutch or other device in the turbo that 'activates' the turbo according to vacuum as you mentioned?

[Hairball]

nah, ya right the turbo is spinning slowly. well actually pretty fast ,but heaps slower than on boost!

[exa18]

Crazy piece of info:

the impeller blades on a turbo can spin at up to 100,000rpm!

[BoOsted]

Even more crazy.... Imagine with no BOV device at all...
100,000rpm - 0rpm in an insant, mmm, lotsa stress!

Dan :afro:

[EXR8D]

Originally posted by BoOsted
Even more crazy.... Imagine with no BOV device at all...
100,000rpm - 0rpm in an insant, mmm, lotsa stress!

Dan :afro:

incorrect....

the impellers on the turbo will never stop completely, unless the engine is turned off.

and even without a BOV the impellers still dont stop spinning, they spin at the same speed. as long as there is exhaust gas passing through the exhaust housing on the turbo, its going to be spinning.
when u hear the "chu chu chu chu" noise, it is the impeller chopping the air passing back though the outlet. yes it does slow the turbo down, and yes after MANY years it will slightly damage the turbo's balance, ntohing else.

[Hairball]

thanks for the details man... i knew it was along those lines :)

[boostinhard]

Hey,
EXR8D is right - but it does slow the turbo down quite signifcantly. Run some high boost with a big turbo and see how much longer it takes to come on boost after a gearchange with no BOV...
Sam

[BENRYS]

the question is

does anyone knwo where one is in mleb?