Hey guys I have mildy build ca18det with a t28 on it with 440cc injectors zm32 maf and a tune but im looking for a bigger turbo. I was thinking the precision 5557 turbo with a .60 cold side and a .63 hot side i read some reviews and everything I have read it doesnt build full boost untill like 4500-4800 rpm. I feel like the turbo might be to big right now for what I have in the motor but im not sure.

Can you get it in a smaller a/r for the hot side? That should move the spool down to around 4000-4500. If not, then yes, you need to go to a smaller turbo. What's your budget? What flange are you using? Top or bottom mount?

well the only reason I was thinking of going bigger right now is I am getting a great deal on this one. I was thinking for doing bigger injectors and some new cams too if I go with the new turbo.

Its a t3/t4 flange and i was thinking going top mount. I was also thinking some 8.8mm lift cams. Im not sure about the duration. I am between the tomei 260 or the tomei 270. Im also going to go with the tomei valve springs and was thinking about a nistune.

It's either a T3 or a T4. It' can't be both. The manifold could be setup to accommodate either though. I would go with the 260 duration. That's not a HUGE turbo, so I don't think the extra cam duration is going to be able to gain you much, and you'll loose bottom end.

ok thanks has anyone had any bad results with the nistune system?

I don't have any personal experience with it, but there haven't been any complaints about it on this forum either.

Ya I havent heard anything bad about then but I just wanted to check and see before I send my ecu out to them and everything

If you find a good turbo please post it. I'm looking for the same thing.

i just got the turbo today. Im not really looking to sell but if i decide to go a different route I will let you know.

I'm not asking to buy it, just let us know which one you went with and what your experience was.

Thanks

oh ok lol, I got the precision 5557 with cold side a/r of .60 and a hot side a/r of .63 i am looking into getting a .48 hot side housing for it to build full boost a little quicker.

Thanks. Has this been done before on this turbo or are you the first to try it?

I heard that the only thing bad about Nistune is that when you tune it, the fuel cells and ignition cells are limited 16x16, meaning that there is less rpm variability for the tune. Power FC is 20x20. This means that larger injectors are a tad harder to tune with Nistune than Power FC. I can't say anything about Megasquirt/AEM/Haltech as I don't know their cell counts.

Is the Power FC a stand alone or does it still use the stock ecu like the Nistune does?

It replaces the stock ecu, but uses all the stock hardware and wiring.

I never knew about Power FC. Interesting concept of replacing the whole ECU.

Sorry to threadjack, but couldn't you make a Megasquirt ECU and splice it into the stock harness? I emailed a company that sells kits and the CAS does work with it. Just thinking out loud.

ya i have never really heard of the FC what are they selling for and where? If its a better option the nistune I might do that.

It's going to cost about $1000 for the FC with a commander, that is, if you can even find a CA18 PFC (short for Power FC). The Power FC for the CA18 is very rare, hence why it costs more than another model PFC. If you get a S14 PFC, you can modify your wiring harness to run it. Don't ask me how though.

If you're strapped for cash, nistune is the better option and will be good for almost any power level you could want. I wouldn't run Nistune on large hp applications though.

My main issue with Nistune is that the stock ECU limits the tuning of the upper rev range. IIRC, the stock map actually stops at 6800, and treats any revs above that the same. I think you can change that, but as was discussed before, you're limited to a 16x16 map. That being said, if you're not running big cams/turbo. It works very well, it's common, and compared to a full standalone, cheap. If I was looking for a tuning solution for under 400whp, Nistune would probably be the only thing I would consider besides Megasquirt.

Well when I am done redoing my ca18 I am going to run a top mount precision 5557 with a .48 hot side, either 1000cc or 1200cc injectors, tomei 8.8mm 260 cams and then what ever I decide to tune it with. I would like to go with a full stand alone like the SDS but it would just take a little longer for me to come up with the funds verses the Nistune.

I don't have enough experience to say if you're going to have issues or not.

So I picked up a top mount t3 manifold, and I found a site that sells .48 v-band turbine housings for my turbo so with the smaller turbine housing I am hoping to build full boost sooner. Also has anyone had any experience with the agp 38mm wastegate? I have a buddy how had one and he liked it so I am thinking of picking one up.

http://datsun1200.com/modules/newbb/vie ... 1&start=50
on e85 and a 2L CA tho iirc, so.... ymmv
also recently posted a full street ca18 rolla going insanely quick using similar turbo on relatively low boost
good response that can deliver monster performance.... looks like good balance to me

I can live with it spooling at 4200 rpm. With a port and polish on the head and some bigger cams maybe I can even bring it down a little more. I will post pictures of the turbo and manifold with both turbine housings to compare the size difference

Sounds like a perfect turbo. Please keep us posted how it works out, since I may do the same thing one day.

So I have decide on my setup. Presicion 5557e turbo with the .48 hot side, agp 38mm wastegate, tomei 8.8mm lift 260 duration cams, detschwerks 1200cc injector, dodge str4 coil and everything will be controlled by a nistune.

Nice! I can't wait for the results. Internals?

For now it has stock pistons and rods, when they go I am going to do forged. I have decided on supertech pistons but I dont know about rods as of just yet

Hi Nick,

I just looked into this when I though my engine might be toast. (I think I got lucky.) I found a set of Supertechs pretty cheap here:

http://www.nolimitmotorsport.com/prod/S ... =CjwKEAjwn

I emailed them asking about pins and rings, and they sent this to me:

"Hi
Pins and locks are included. The rings you need are:

http://www.nolimitmotorsport.com/prod/SUP-GNH-8350

Should come out to $390.40 with the rings. Feel free to order online, or
give us a call. Thank you"

I have never dealt with these guys, but that seems like a pretty good deal.

Darian