ca with sohc maf about to max out on 10psi"

[dvd]

Hey all, I have a ca18det with a aftermarket log manifold and a gt2510. My current setup is a blowthrough SOHC maf and I have a safc2. Ever since i had the safc i noticed that the maf is always close to 90% when i'm flooring it. FOr example: while driving back from work i floored my car to 100% throttle and according to the afc at 5555rpm the maf was at 91% and turbo was boosting around 9~11psi probalby 10. Is that posssible? Or is there something wrong with my maf wiring?

[kapower06]

No its possible that the SOHC mafs is maxing out as it only reads 210whp so im not sure what that turbo is capable of, but it may be close... 210(.91)=191.1 hp. 191.1 whp is pretty easy to reach. switch to a N60 maxima MAFS they are good to 325whp. With my hybrid turbo and stage 3 chip from Horsham Developments, at 17-19psi I hit 88% 325(.88)=286.

I just so happen to have an extra N60mafs if ya want it for cheap. lemme know.

[dvd]

do you have the pigtail too?

[sideways danny]

how similar is the 240 sohc MAF to a genuine CA18DET maf? I've heard people say the CA MAF maxes at 190rwhp but I know of many many poele running it reliably way past that. I wouldn't trust the SAFC scale for the MAF limit personally

[float_6969]

Yea, the stock MAFS (or a SOHC) isn't hard to max out at all. If I was still running a MAFS, I be maxing it out on the stock CA T25 at 15psi. You've got a much more efficient turbo so I'm not suprised to see you're that close to maxing it out.

Pick up kapower's N60. That will give you plenty of headroom.

[float_6969]

It's a very slightly larger diameter. Close enough to the CA MAFS that most people can use it w/the stock ECU and not really have any issues.

[mbmbmb23]

I believe the gt2510 is good for 250hp on SR's (it's basically a ball bearing version of the stock S13SR turbo).

-m

[sideways danny]

It's a very slightly larger diameter. Close enough to the CA MAFS that most people can use it w/the stock ECU and not really have any issues.

well I'm still using a stock CA MAF and my power grap is in the dyno sheet sticky

[float_6969]

Do you think the blow through setup is causing an erroneous reading? I can completely believe that the MAFS % on the SAFC is wrong.

And now that I think about it, here is a little math for everyone...

TT Z32 MAFS was used on a motor that produced 300HP in stock form. That MAFS is capable of supporting 500HP IIRC.

That means that it is oversized by a factor of 2/3's. (AKA, multiply 300 by 1.6)

If this MAFS oversizing holds true, then the CA/SOHC KA MAFS is good to right at 300HP.

I still think it's a pretty big restriction to the intake tract of the turbo, and it certainly can't hurt to use the Maxima or Z MAFS.

[Liquid_Neon]

what does the maxima N60 maf fall under when looking at the SAFC2? I myself have a maxima maf and was trying to find the sensor number it usues. The booklet doesnt mention maximas, just Z32's and sum other VG engine powered cars, but nothing maxima.

[rico05]

Odd. I spike to almost 1bar and I have never had an issue on my SOHC MAF. I run 12psi daily on a T25G, and had never an issue.

[davidricardo86]

Hey kapower06, how much for a Nissan Maxima N60 MAFS w/ pigtail shipped to 60804-4114? Thanks.

[float_6969]

I think it's the same as an RB20 MAFS. Maybe that'll help.

[rico05]

Anyone know which MAF to select in LiveEdit for the N60 MAF? Is it close enough to the RB20 MAF to select it?

[float_6969]

From what I've heard, it's the exact same thing as an RB20 MAFS.

[dvd]

nah even when it wasnt blow through setup it still had the same percentage.

[float_6969]

As danny said, IDK if the SAFC % can be trusted. What I suspect that is it is basically a percentage of what is supposed to be the maximum signal from the MAFS, which is 5V. What I think is that the MAFS is actually capable of more than a 5V signal and that is why the percentage is perhaps skewed.

[dvd]

maybe because I have my settings for the maf set to the ca18det's in's and out? probably no different because the sohc reads the same right?

[float_6969]

No, I think it's off by 1 number from the CA MAFS. I don't know which as I've never really messed with a SAFC.

[dvd]

i guess my next question is anyone with a sohc maf can tell me did they use the ca maf settings or used a ka sohc one? I'm thinkign it should be run on 5?

[TurboFortysx]

I have tried three mafs,the CA, SR, and KA. The best one I got to work was the CA maf which maxed out at 330 rwhp at 14 lbs.

[Liquid_Neon]

any one know if the DE and DET mafs are the same? ill check my de part number when i get a chance.