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 Turboing A Non Turbo Ca18  

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stephen16
  • stephen16
  • Regular User
  • Member No.: 44,079
  • Joined: 21-March 06
  • Posts: 2,084
  • From: Australia
Post #1 post 18th January 2011 - 05:18 PM
Hey guys, I've found a turbo setup for a ca consisting of a t25, stainless manifold and custom intake

I'm wNting to fit it to my s13, where do the standard oil and water feeds and returns go, i can do all the work my self this is the only thing I'm not sure of

Also if I buy a standard dump pipe will it bolt up to my na exhaust or are they completely different

Cheers

--------------------
RX7's: pure Adrenaline in driveable form

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Mechano91
Post #2

you have to decompress the ratio of the cylinders too dude

pipster11
Post #3

or limit the boost to about 4-5 psi without an intercooler or about 8 with

stephen16
Post #4

Double post

stephen16
Post #5

I talked to a guy at my work awhile back who was a mechanic who said with an intercooler he had no problem running 10psi

That's not my question tho I have that side of things sorted

pipster11
Post #6

was replying to the prev post

you'll probably want a stock turbo exhaust at least

but full systems can be found cheap

you may want to thing about going for a straight sr20 swap tho

eVL slider
Post #7

or u can just drop a ca18det in it :thumbsup:

vectorazz
Post #8

Or just buy a DET

zorak
Post #9

QUOTE (Mechano91 @ Jan 18 2011, 07:55 PM) *
you have to decompress the ratio of the cylinders too dude


Is an ideal way but still you can do it without having to pull the head or drop different internals into it.

As said limit boost non cooled to 4-5psi and upto 10psi cooled absolute max and make sure whoever tunes it has done this before as it will be very easy to stuff the tune.

I know a few 300zx owners done this to the VG30s with good results. Keep the timing down, fill it with fuel and have some fun the higher comp makes up for the lag down low in DETs

Nissanclubman
Post #10

Just to give some idea of the potential and to put some data on the table I've added two graphs of a NA CA motor converted to run with a turbo. Total standard internal, head bolts, $45 head gasket, no oil squirters etc etc. Totally nothing special motor wise and running the Std CA ECU with a custom mod chip.

I have profiled the turbo controller to 12 PSI and you can see I'm getting 260 hp at 4500 rpm and 290 hp at 6600rpm with an aggressive AFR of 13.5

The next graph shows an 18psi run and although the run was short and sharp I got just short of 300hp at 6400 rpm still running ARF of 13.5.

I don't know what this nonesense is about keeping boost down at 4psi or lower head pressure. This motor had a shaved head to remove a warp from the previouse owner and is now running 220psi on a compresion test. Thats about 11.5 : 1.

Just to keep things in perspective however you can't do this with std MAF, std injectors or std coil packs. It needs a bit of tuning, pretty straight forward and cheap but needs to be done if you want to get into boosting NA engines.


 

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