SR20 Forum banner

1 - 17 of 17 Posts

·
Registered
Joined
·
21 Posts
Discussion Starter · #1 ·
I went to another place to introduce this...
I got a lot of static, they said I was crazy and wanted to
see dyno numbers I don't have [ for now].
I'm going to be in the auction/ marketplace shortly with these.
I was told, by people who call themselves tuners....
...all manner of things.

I'm running the 70mm maf, with stock 259cc injectors;
and no ecu reprogram job....stock ecu.
There are a couple- support, add- on pieces that are necessary for
normally aspirated. Just one for turbo and 370cc injectors; in-leu of
a reprogram job, but I'd recommend a GOOD A/F ratio guage.

One day I'll have to go out to the driveway and explain to the
little 'ol NX that she just can't work that way....I love it.
Let me know if there is an interest.....fuzz
 

·
G-unit
Joined
·
1,132 Posts
Why would you need a 70mm MAF with 259cc injectors NA? Also the interest would depend on RESULTS, not vague postings on the internet. You can do a MAF swap with a S-AFC, so how did you do it?

Travis E.
 

·
Registered
Joined
·
21 Posts
Discussion Starter · #3 ·
I may have something for you here in the classifieds if
I'm not run- off by the spanish inquisition.

Just to introduce the idea: I've back engineered popular
JECS - genuine nissan 70mm mafs to identical functioning
with the z32tt maf you are familiar with.

You can run these units with 370cc injectors and an ecu- reprogram job
or use a s-afc and no reprogram job.
I refer to the fourth and fifth generation [ blue florescent display]
model s-afc. I highly recommend a GOOD quality A/F ratio guage
to resolve your mixture according to your modifications.

I have several units ready and will also be in the poular auction/
marketplace.
I'm running one on my normally aspirated NX with 259cc injectors
and no reprogam to the ecu. Luv those 264 cams!
Now in- prototype: 7m- supra Q45 upgrade

Standard- flanged models and in- line cool air pipe models without
screens are ready; pre- wired and diagramed for your application.
Let me know if there is an interest....fuzz
 

·
Registered
Joined
·
1,908 Posts
Ya need to bring your car to Dallas this weekend and dyno it. I sent ya a PM. If it works it'll be a big hit but most folks will want solid dyno numbers to to back it up. Let me know we are gonna dyno sunday the 29th starting at 9 AM.
 

·
Registered
Joined
·
21 Posts
Discussion Starter · #5 ·
skyliner said:
Why would you need a 70mm MAF with 259cc injectors NA? Also the interest would depend on RESULTS, not vague postings on the internet. You can do a MAF swap with a S-AFC, so how did you do it?

Travis E.
I rework less sought- after 70mm JECS mafs; pre- wire them
for N/A or turbo applications and supply settings for the s- afc.

For N/A applications, this amounts to savings as opposed to
370 injector purchase and ecu reprogramming.
There is no mystery as to the gains the turbo guys get using
the larger maf. N/A users get them too... Look in that 53mm
stock maf, you have a 60mm throttlebody. Where are you
going to tell me the restriction is? IN- line cool air pipe models
available as well. The s- afc allows you to bring the A/F to
your engine and your modifications. For a normally aspirated
configuration I recommend the low- cost EFI O2 feedback
monitor with injector percent firing scale. A techtom 100 can
supply O2 voltage in real- time as well, but the EFI unit is easier
at- a- glance. I tuned mine using both.
 

·
getting close
Joined
·
2,002 Posts
How much are we talkin for a jecs 70mm maf with wiring for a 93 highport engine? I have a jwt ecu 370cc primary injectors and 450cc secondary injectors, and an apexi s-afc. What air filter and adapter do you use with these? 300zxtt?

Thanks,Jon
 

·
Registered
Joined
·
21 Posts
Discussion Starter · #10 ·
james vick said:
Ya need to bring your car to Dallas this weekend and dyno it. I sent ya a PM. If it works it'll be a big hit but most folks will want solid dyno numbers to to back it up. Let me know we are gonna dyno sunday the 29th starting at 9 AM.
Hello James,
I'll make you a trade [ have'nt seen the P.M. yet].
I won't pitch this until we can get together and run it on the machine.
I realize everybody would like to see some numbers. I have a new concern
about walking home from Dallas. As of a couple nights ago, I overran
the clutch. It still drives, but I'm concerned that it won't hold- up long.

I value your opinion on the subject of the clutch. A while back, I had been
looking at that double kevlar disk by clutchnet. I realize I can't have it all,
but would like something streetable; capable to the 250hp range
[in case I can make my other project grow]. However, I'll settle for something
less than that; above all, I need it to be kind to this ghastly expensive
jun flywheel I've got in the box. The smaller the pedal effort the better.
I have real difficulty finding concensus on the subject.
Any inputs here will be greatly appreciated. In the meantime, James is
familiar with an offer I made on another 'board'. If you are in the Dallas
area and want to try it for these guys to evaluate; I'll give you one and
help you dial- it-in.
 

·
Registered
Joined
·
21 Posts
Discussion Starter · #11 ·
james vick said:
Do ya have a part# for the MAF?
22680-16v00 cedric
22680-02u00 skyline
22680-16v00 max

I think I have one coming from a leopard, but I think its
the same.
 

·
Registered
Joined
·
21 Posts
Discussion Starter · #12 ·
insane imports said:
How much are we talkin for a jecs 70mm maf with wiring for a 93 highport engine? I have a jwt ecu 370cc primary injectors and 450cc secondary injectors, and an apexi s-afc. What air filter and adapter do you use with these? 300zxtt?

Thanks,Jon
Come back with a bit more for me here. Since you have 370 primaries,
I'm assuming you're using the s-afc on those and an extra injector
controller on the others...
You already have what you need. You could use a maf from myself or
a z32tt you are already familiar with; makes no difference.
Which model s- afc do you have? The blue ones; yes?
The one with the knock- meter?
 

·
Registered
Joined
·
21 Posts
Discussion Starter · #14 ·
insane imports said:
The older blue 1 no knock. Yes i have an hks aic running the 450cc injectors.

Thanks,Jon
I forgot to mention, I'm turning green looking at your set-up.
I wish I could find some time to build mine.
Just so we're on ' the same page', You can run this maf without
an ecu reprogram to accomodate it...
You might rather pay me for it, as opposed to what I want
from you... and that is some testimonials and help here that I can
use; persuading others that might be interested...
If that part does'nt bother you, I've got a free one for you and
full support to get it going...How's that grab you?

Lets' take it off the page and go direct. Check your Priv Mess
for a direct e-address. We'll take it from there..
 

·
Premium Member
Joined
·
5,202 Posts
fuzz said:
I went to another place to introduce this...
I got a lot of static, they said I was crazy and wanted to
see dyno numbers I don't have [ for now].
I'm going to be in the auction/ marketplace shortly with these.
I was told, by people who call themselves tuners....
...all manner of things.
Hey Mr Fuzz,

Since you never replied to my post on Nissan forums, I thought you might find my latest testing of 70mm MAFs on mild bolt on motors interesting. Your series of posts around the SR world made me want to revisit the issue since its been many years since I tested a bigger MAF and cams, etc have gotten better. I tested a 70mm MAF last weekend on a SR with S4 cams and HS Gen 5 header and CAI with UD pulleys. The long block was stock. The Motor made 156 whp before the big MAF. This represents your typical semi hard core bolt on parts customer. Then I bolted on a 70mm MAF and reprogramed the ECU to correct the A/F ratio. Guess what sorts of gains I had? Zero!

I did put a vacume gauge in the CAI and the intake manifold and the manifold vacume at WOT fell from 8-9 inches of h20 to about 7-8. The CAI vacume was about 3 inches lower so their is less of a restriction with the 70 mm maf but the throttle body appears to be a worse restriction, its just not enough of an improvment for the engine to make more power.

Perhaps with a 70mm MAF and a bigger throttle body, a difference might be made on the bolt on level. I'll test a bigger TB soon. These test results are in line with what Andreas Miko and I have been saying for a while, that bigger MAF's don't help NA motors until you near 190 hp.

I seriously don't think you are going to find a huge difference when and if you dyno either. So your assumptions appear to be wrong, unless you have technical issues with my test methodology.

Mike
 

·
Coropate greed hater
Joined
·
4,044 Posts
Oh boy, this guy made it here too? :rolleyes:
 
1 - 17 of 17 Posts
Top