ITBs for a ca18de?

[monkae86]

anyone know where or if i could get some ITBs for a ca?

i think nismo made some or something but too expensive...

and also, they wouldn;t be suitible for a Turbo set up would they, only NA?

[japlish]

you may come across a custom set on yahoo auctions, i'd just use 20v throttles on a cut down ca18 inlet manifold.

ITB's and turbo's work fine together (skyline gtr's run them)

[hatzo]

Tuning them is a Pain though.

The two most fessable choices are:
Remapped ECU/Power FC + AFM or,
Motec (Use TPS for low load referance , then switch to MAP sensor for High Load).

CA's arn't the best motor in the first place , the last thing you want it to be doing
is having it revving alot. (They like to spin bearings)

[samc]

<div class='quotetop'>QUOTE (hatzo @ May 28 2008, 01:43 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=537862)</div>
Tuning them is a Pain though.

The two most fessable choices are:
Remapped ECU/Power FC + AFM or,
Motec (Use TPS for low load referance , then switch to MAP sensor for High Load).

CA's arn't the best motor in the first place , the last thing you want it to be doing
is having it revving alot. (They like to spin bearings)[/b]


Revving is what ca's LIKE doing.

Any engine can spin a bearing if you don't keep an eye on the oil.

If you give it some decent oil and do oil changes frequently after a thrashing i'm sure a CA will like the owner alot more.

[monkae86]

<div class='quotetop'>QUOTE </div>
CA's arn't the best motor in the first place , the last thing you want it to be doing
is having it revving alot.[/b]

interesting you should say that, i'm going for a CA rather then an SR for the fact they rev harder... whats the go?

[ae71]

yeah i would go custom 20v itb's. GTiR SR20 pular's also had them but id be guessing that they would be fairly pricey and hard to get hold of, plus you would still have to adapt them to suit the CA.

or you could go twin sidedrafts even and get a cheap ignition computer:P

[hatzo]

Ive Pwnd a CA (Me like the stand stills :) )

Midrange Torque is what makes a car accelerate ,
not the top end power the engine produces.

A SR20 with 190rwkw will out perform a CA
with the same power (or even greater) output,
and is more than enough for a Short wheel base car.

[rthy]

<div class='quotetop'>QUOTE (hatzo @ May 28 2008, 02:16 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=537870)</div>
Ive Pwnd a CA (Me like the stand stills :) )

Midrange Torque is what makes a car accelerate ,
not the top end power the engine produces.

A SR20 with 190rwkw will out perform a CA
with the same power (or even greater) output,
and is more than enough for a Short wheel base car.[/b]

if mid range torque causes a car to accelerate then why is it fastest to rev the engine and have the peak power in between the gear changes instead of peak torque? An Sr20 might be faster with the same power because it has more area under the power curve which is what really matters.

If anyone wants to rev a ca18 then it might be a good idea to have an external oil drain for the back of the head.

[Benno]

CA's do have a external drain from the head, well on the intake bank anyway.

[rthy]

I will easly admint to not knowing anything anout it but apparently there is a real oiling problem there and it killed the HPI silvia while drifting. As for the throttles I say go the 20V option as well

[Benno]

is that the same as the drift battle silvia? i was under the impression that motor had been running in jeramy's sprinter for a long time now. sure stock motors have a habit of spinning big-end when worked hard/boosted, but i haven't seen many built/refreshed motors doing the same thing.

[works510]

Nismo option throttle bodys, don't think they exist.
I do belive there is a rare dcoe style manifold for a CA though

CA stuff is pretty much no existant on yahoo japan these days :(

Tap the head for external oil drain back to sump.

Ecu for ign with carbs? stuff that. Grab a sigma dizzy (will have to remember off what years, was long ago when I looked into n/a CA) slight mods to fit.

[stanzzza]

the only problem with ca18's is that people don't pay attion to the guages

the one thing that kills ca18's is oil temp. they really need an oil cooler.

[samc]

exactly. oil degradation is the feind.

[rthy]

in HPI they were saying something about too much oil going to the back corner of the dead and going through the breather pipe, they had to refill the oil every single lap. When the drift nationals where on they had a drift guy from japan over and he was driving the car, he didnt pull into the pits, did a second lap and the engine ran dry. don't ask me why or how as I don't know, thats just what I remember they said. If this is correct then work510 is right drill and tap a big hole out the side of the head and back to the sump.

[samc]

yes thats right. though it's easiest to remove the welsh plugs on the back of the head where the cams are and running the drain from there to the sump.

Maybe their oil gallerys were clogged?

[rthy]

removing a welsh plug sounds good to me, providing its in the right spot it would lallow for heaps of flow.

[Waz]

:whistling:

[stanzzza]

install in s13 super slamed and massive neg 14's
:lol:

[slide86]

thats cool

i was thinking bout splitting the intake manifold and using the part that bolts to the head as the adaptor for some blacktop throttles.

those that know CA's will know what i mean bout the splitting of the manifold. then just use the actual throttle part and adapt it to the manifold part....that way there is sill the correct injector boss in the correct position

[rthy]

ok assuming the bore spacing isnt that far off, which I assume it wouldn't be seeing they have an 83mm bore, then you do possibly do the following:

get a peice of 20mm plate of so out of aluminium, machine it up to be identical to the face of the 20v manifold, ie: what the throttles bolt to, weld that plate to the manifold and then with an alumium cutting ball end burr hand finish/shape it to make the throttle opening nicely countour the inside diameter of the runners.

What do you think?

[slide86]

i have a CA18de manifold split here already. and i have a bigport jdm manifold also, i shall compare them and see. just for interests sake

i don't have my quad setup anymore :( so i can't measure that

[samc]

<div class='quotetop'>QUOTE (was @ May 28 2008, 11:18 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=538130)</div>
:whistling:[/b]


That looks PHAT!!

[floody31]

I'm guessing, since CA's are a lot like RB's, the oiling issue is mainly pooling oil up top. They have big galleries feeding but fark all draining. RB20s/25s/26s/30s all have issues with it at sustained high revs. Basically you restrict the feed galleries (front) and fit external drains at the back of the cam banks, as suggested.

When you lose a lot of oil up top, then add cornering Gs, its hard to get enough oil to keep the pump well fed and pressure up, as soon as pressure drops they hammer bearings. Plus I'd guess the oil vapour getting forced into the intake would also promote detonation, further hammering fark out of the big ends.

Rectify the problems, no worries.

RB guys are lucky we can run the N1 high volume pump as additional insurance too..


Pretty sure EFI Hardware and probably lynx/redline have manifolds to suit CA18 by the way.