This is my review/experience with U2NDYNO
So, my car was tuned by Dan “Happy240sx” from U2NDYNO.com, for those who have never heard of him, you need to get out from that rock you live under.
I had met Dan before he had his mobile dyno/tuning services, and he was always a cool guy. Having seen his S14 up close when it was making 400+whp on his GT28 and heard it was seeing 20PSI daily made him the obvious choice when I wanted my SR with Power FC tuned.
After some scheduling conflicts we finally settled on a tune day that worked for the both of us, He was always easy to get a hold of via e-mail and easy to work with. Upon my arrival he was getting the dyno ready and then he quickly bolted the car up.
The motor is a stock SR with FMIC and 3" turbo-back exhaust. Why tune this you might ask? Well, I had the Power FC sitting in the closet for a year and couldn’t see it collecting dust anymore, so I installed it and figured why not get it tuned and see the progress as more and more mods get added.
Dan jumps in the car and starts going crazy on his laptop. For the first little while he did some monitoring and changed a few settings here and there at different load points. Next he was ready to run a baseline. The car was accelerated in 4th gear but by 4000-4500RPM Dan quickly let off the throttle. For some reason the motor was running lean at 16+ AFR and he wasn’t comfortable with that. After a little tweaking he did another baseline pull this time he got a full reading. The motor made roughly 188hp and 186ft/lb. On a dynojet this same setup made 204whp and 202wft/lb which is about 8.5% more than the dynopack, this appears to be normal. You can find an article on the U2NDYNO website about this here: http://u2ndyno.com/index.php?action=fullnews&id=13 . Now that the baseline was established Dan knew what he was working with and began making some adjustments here and there searching for steady AFR’s. The next 3 pulls the car went up to about 200hp and 200ft/lb. After some cooling down he made some more adjustments and we upped the boost to 10PSI, a nice safe daily driver number for the T25 (I know some people run 12PSI but whatever). The next few pulls and tuning changes made more and more power. After the AFR across the whole RPM range was adjusted Dan moved on to the timing. Once everything was said and done the car rolled out making 225hp and 224ft/lb. unfortunately the AFR line was not as smooth as Dan would have liked. The AFR’s are around the 12 mark but there is the one point from 4000-4800RPM where they get up 13 and the injector correction is maxed out, whether the motor flows really well at this point or not I clearly need bigger injectors. Also the “el cheapo” manual boost controller I have does not hold boost very well, at about 5200-5400RPM the boost falls from 10 to 9 then back the stock 8.5, this causes the power pretty much stay flat from 5400-6500 then fall to 200 at 7000, and causes the torque to fall steady from about 222 about at 5400 down to 150 at 7000. A good boost controller should help keep the torque a bit flatter from the 5000-6500 range and should definately help the power climb to 230+ at 6500. Either way I walked out of there a happy customer making considerably more power and the motor was feeling super smooth when I drove home.
Now, one week later…
So it has been a week since Dan tuned my Power FC and I have gone through almost 2 full tanks of gas, I spend 45KM on the 401 going to work and 45KM going home. This plus my daily city driving and all I have to say is WOW. The car is nice and responsive, it just picks up and goes compared to before. The fuel economy is great, better than stock. I am not the kind of person who does not drive super conservatively, I drive normal but push the car every so often, gas prices suck especially for 94 but hey, I am not into this kind of stuff to save on gas… either way I was getting 450-500KM to the tank on the stock ECU. I have driven conservatively a few times strictly highway and was able to get 550-600KM to the tank. Now with the normal driving and actually pushing it a tad bit harder I am getting 475-550KM to the tank. On this second full tank of gas I am at roughly 1/4 tank left (the 3rd line) and at 450KM (on stock ECU I would be at 425KM)I normally get 90KM from the 3rd line to just about empty. I have reached 3 litres left in the tank a few times.
The most surprising change to me though is the exhaust noise, it is actually less droney. Cruising on the highway does not result in the same amount of drone that I was getting before and even friends have noticed the exhaust sounding like it has a bit smoother tone without me mentioning anything.
That has been my experience so far. I plan on picking up an adjustable wastegate actuator to help fix my boost issue and then having the car dyno’d on a dynojet to compare HP results. If the same 8.5% gain is present as the baseline I should see 240+whp and 240+wft/lb.
For all the guys out there who want to get their car tuned but do not have any knowledge of tuning or need it done right, I highly recommend you hit up Dan to have your car tuned. He has a really good flat rate; he will tune your car till it is perfect and reliable no matter how long it takes for the same price. He knows his SR’s really well and won’t ask you to step away or hide what he is doing from you when he is tuning YOUR car that you love and care for. He is super easy to deal with, and not afraid to mention any issues or changes that he is making when asked.
U2NDYNO.com for the win!
I will defiantly go back when I get injectors, MAFS, and a bigger turbo 
THANKS DAN!
