what limits the ca? mafs/injectors/?

[slownslurious]

I searched and I'm not finding any definite answers, but with the stock injectors and the stock mafs I'm guessing both would max out around 225 ish, correct?I just bought a 300zx mafs at the junkyard and I think I'm going to go with a rom tuned ECU tuned for z32 mafs, but I think I'd like to get 440 injectors too just so I don't run out of fuel. Either from a skyline or an eclipse, doesn't seem like it makes a difference.Anyway if I am running around 200 hp its probably not going to make a difference, but at what power level do these things need upgraded?

[F3600]

your on the right spot.. on my mutlichecker , i hit 90 + duty cycle and 90 % maf readout at 15 psi. Soo that's about 180 185 Hp the the wheel 215 220 at the crank

[iliketocrash]

another fan of the multichecker! woohoo!

[slownslurious]

15 psi on the stock turbo?mine won't even hold 15 to redline.. hell it starts dropping off at 5800 rpm or so.

[fanta]

Are the multicheckers even available anymore?

[c-rad]

Are the multicheckers even available anymore?

Nah, Apexi stopped making them years ago, but they still pop up used on Ebay once in a while.

[F3600]

15 psi was just an example cuz this is where youre about to go beyond the MAf and injectors capabilities

[float_6969]

You nailed it on the head man. I know the stock CA T25 won't hold 15psi to redline, but about 180hp at the wheels is the limit of the MAFS and injectors.

[fieldss13]

i know with an upgrade to gtr standard injectors and 300zx mafs and a t25 you can get 230 rwkw

[float_6969]

i know with an upgrade to gtr standard injectors and 300zx mafs and a t25 you can get 230 rwkw

Did you mean SR T25, or T28?

[datsunboy]

You nailed it on the head man. I know the stock CA T25 won't hold 15psi to redline, but about 180hp at the wheels is the limit of the MAFS and injectors.

**** I must've been close last dyno then!I got 178.1HP at the wheels running a factory MAF, didn't stumble or cut out or anything so all was good.I have a N60 MAF and 450cc inj no so I should be sweet

[NeedCAforS13]

I made 178whp as well with stock injectors and maf on 8psi with an SR turbo. I've been running it at 10-12 psi with no noticeable driveability problems, and it feels alot faster then when it was on 8 pounds... are you sure 180whp is the max on stock maf and injectors ryan? I would guesstimate I'm in the 200whp range right now on 12psi with an SR t25g.

Sean

[slownslurious]

I've got eclipse 450 injectors and Z32 mafs now, but nothing to run them with, I'm thinking about an HKS F-con since we happen to have SGP here in houston that is an HKS pro dealer and they can tune them ($200 for an hour of tuning... I guess thats reasonable).So once I get the rest of my **** up and running (srT25, new manifold, intercooler, etc), thats where I'm headed.

[biosehnsucht]

my 450's just came back from being cleaned etc, and I got a RB20DET MAF.

now I just need to get off my lazy *** and socket my spare ECU and cook me a rom..

still stock turbo and no boost control, hell I don't even have a boost gauge yet haha

[undertaker]

When I was running 220whp my afm maxed at 6000rpm according to my SAFC but there were no driveability issues at all above that. I now have a green sticker RB maf and managed 240whp with stock injectors, fuel pump and intercooler, the injectors are definately too small at this level though so don't try it. I'm running a S15 turbo at 12psi and this afm is at about 90%.

[slownslurious]

I'm glad I have a boost gauge, everyone says they are ricey and for show, but then when my wastegate line melted and my turbo was running with a closed wastegate, I noticed right away.. without a boost gauge I would have had no clue and eventually, boom...biosehnsucht, I see you are only in DFW, if you are skilled at burning chips perhaps we should meet up sometime, I'd love to have a chip burnt for Z32 and 450cc injectors, but I don't know the first thing about it (even after reading the ROM thread- its like reading latin to me).

[slownslurious]

you ran a stock fuel pump up to 240 hp???isn't that like saying "gods of detonation, I throw myself on your mercy and pray that I shall not lean out?"

lol

But I'm glad to see that kind of number, thats what I'm hoping to get at once I switch turbines to something slightly larger. Does anyone know what an sr20det redtop turbo will do on a CA with the usual (IC, exhaust, Up injectors and Up mafs) at around 12-13 psi of boost?

When I was running 220whp my afm maxed at 6000rpm according to my SAFC but there were no driveability issues at all above that. I now have a green sticker RB maf and managed 240whp with stock injectors, fuel pump and intercooler, the injectors are definately too small at this level though so don't try it. I'm running a S15 turbo at 12psi and this afm is at about 90%.

[undertaker]

Yup risky but I wanted to know what it could make, I had A/F monitoring and a HKS knock monitor too so not so much of the praying.

[NeedCAforS13]

keep in mind he has a stock *silvia* fuel pump, not a craptastic 240sx one...

Sean

[slownslurious]

yeah, I did forget that. how much bigger is the silvia pump then? cause I know people that have taken the stock 240 one to 220 hp on KA-t's as well, but I know its on the ragged edge.