MY CA18DET RUNS!!!

[drfts12]

Well it idles at least...

I put a ca18det in my 1988 s12 aka 200sx.

Alright, I just finished up all the wiring, relays, etc. And it starts. Runs like a pig though, i think it has something to do with the vaccum hoses or whatever next to the intake mani:







Almost done, just gota add my bov, and put on the shroud or electric fan.







When i drove it... it had NO HIGH END POWER AT ALL. it sputters after like 3k rpm... i never got to really spool the turbo yet... anyone know the cause?

[g-ride]

im gonna guess its all those open vacuum lines...

[240sxbobbis]

yea they are your only gonna use 2 of them though

[anumeric]

congrats on your ca, its nice to see some s12 love. As for those lines it depends on what and if you still have the lines hooked up on the other side of those pipes. I just T-ed my fpr, butterflies, and the vaccum line on the back of the intake plenum together and didn't used those pipes below the manifold.

[drfts12]

did you leave those pipes open or did u plug them?
Modified by drfts12 at 10:53 PM 9/21/2006

[teddy]

You can take off those 4 little metal vacuum bends. They're just kind of like extensions. There's a vacuum diagram in the stickies, and make sure to cap off the vacuum port right underneath the throttle body.

[MasterZenki]

i know this post is few months old but did you ever figure those vacuums or are you good now?

[Bwana]

Good luck... he hasn't posted in over 3 months.

[MasterZenki]

haha oh i was just checkin...i had vacuum problems before...learned by doing it myself

[Ca18det240sxchk]

yep those vaccume lines you have circled ALL NEED TO BE PLUGGED!!! i had to with mine.. just play with them and find out which one goes where!

[asher4857]

as anumeric said.. they dont NEED to be plugged if you didnt use them... They are extensions from your other vac lines behind the motor, so id anything is hooked into the back of them, then plug them.

[pnblight]

wait a minute guys these lines normal feed important equipment like the fuel pressure regulator/ turbo acutator/ 8port butterfly low speed solenoid and the other is a vacuvm feed line to run these 3 systems. I foyu want to plug ovr dissconnect these lines you still need to get these systems working again.

pete

[float_6969]

There is a basic vacuum diagram in the stickies...

[driftin8ez]

There is a basic vacuum diagram in the stickies...

Those metal lines do nothing if you have you vac set-up like this.

[iliketocrash]

the only flaw in that vaccum diagram is that it will keep the butterfly valves open almost 100% of the time.

[missionsix43]

the only flaw in that vaccum diagram is that it will keep the butterfly valves open almost 100% of the time.

O RLY?

Mine open up at 3800 or wahtever and its routed like that

[float_6969]

The problem with that diagram is that when you step on the throttle, there is no vac to keep them shut and they start opening.

[missionsix43]

The problem with that diagram is that when you step on the throttle, there is no vac to keep them shut and they start opening.

I see... Ill check out the stock diagrams.

[RS12Turbo]

Is it bad to have the vac lines set up like the diagram.....IF it keeps the buterflys open 100% of the time?Advantages? Disadvantages?

[float_6969]

No, it's not bad to have them setup that way, that's why we posted it in the stickies. It just basically renders the butterfly's useless under load. They are still closed under part throttle and help with fuel economy.