Author: sr20tuning

Well I’ve had the car back for a few days now and bloody hell is it fast. Now it doesn’t get traction until third gear coming onto boost, and can even break into wheelspin onto less than perfect roads. In short the car made 196 rwkw on 15 psi, but had problems when wound up further. On 18psi it made more midrange coming onto boost but for unknown reasons the power dives off soon after, below the 15 psi power curve. Even so, the 15 psi setting is fantastically powerful. The power delivery is kind of strange, in that it is sort of laggy but not as the same time. The turbo spools immediately under throttle but still needs a few psi on board before it gets going. The result is a really smooth power delivery that builds until some decent revs are on board and then it just hauls all the way to redline. Before the turbo spooled and gave a quick burst of power in the midrange before running out of puff up top. Now power just keeps building as far as you rev it.

I have to return back to Unigroup to discuss the info going onto the site and to print out my dyno graphs, so a much bigger update will be coming after then. Unigroup have been fantastic throughout the whole thing, keeping me up to date with what was happening and looking after my best interests at all times. They are thoroughly recommended for any sort of diagnostic or tuning work. Thanks guys 🙂

Well the car is still not back but it’s my fault this time. In my wisdom I decided to accidently leave my fuel pressure regulator on the end of the spare rail when I sold the other injectors. So now a few days delay while another is sourced for me. Hopefully I will have the car back early/mid next week.

Some more work has been done on the redirection and domain setup by Marty from SilviaNSW. Everything is now 100% complete with the changeover. A huge thanks to him again, his repeated generosity has allowed the site to become what it is today.

You will hopefully notice some Google advertising at the top of every page. Clicking on these makes google pay me a small amount of money, which if reaches a certain amount per month is sent to me. It would be nice to get something back for all the hours that have gone into the site. So please give a click or two if you can spare the time.

Tuning is almost complete I believe, hopefully tomorrow night I will be at Unigroup to see the final power tuning undertaken. If all is well the car will come back with me. I won’t be holding my breathe though as the injectors were almost a week overtime in being high flowed.

The site is now up and running at http://www.sr20tuning.com as discussed. All the thanks goes to Martin (Mayhem) of Silviansw, for hosting the site on the http://www.silviansw.com server. A huge thank you must go to Marty and the other admins/moderators on http://www.silviansw.com, their ongoing support and assistance is very much a part of the site’s success today. Look for some banner sponsors in the near future as details are finalised.

In 180 tuning news the injectors should be done by the end of this week, meaning the tuning should be done mid next week. There is still the z32 afm to be tried, so hopefully that is 100%.

No more news on the car but some site announcements can be made. Due to the growing popularity of the site, it will soon be upgraded to its own hosting server with as proper dot com address. I intend to register and use sr20tuning.com as the domain. Basic banner advertising will be implemented, and the content of the site will be expanded as much as possible. This includes the previously mentioned articles by DumHed, as well as completion of others such as the Jap bolt-on turbo guide. New pages such as a basic maintenance guide (as suggested by Kuro) will be introduced. Obviously once the car is returned from Unigroup the tuning pages will be thoroughly revised and updated.

The aim is to make the site the number 1, most definitive SR20 site around. All free of charge and in a format easily understood by a wide audience.

The car is at Unigroup for ecu retuning currently, as planned. The first hassle was one of the injectors not firing. I sold the set for $300 and am now having the factory 370cc injectors high flowed to around 650cc. Apart from this the car has had no hassles, making 173 rwkw as it came in (in a similar leaning off state of tune as the last t25g run). This amount of power is surprising as it didn’t feel that quick on the road, due to a lack of midrange. Tuning and twice the amount of boost should eliminate any problems like this though. With such a good starting point (173 rwkw on ~9.5 psi totally untuned), the target of 220 rwkw is looking promising.

The injector fiasco will slow things down a bit but hopefully the car isn’t off the road for too long.

I have updated the Z32 afm page with pics of the new pipe in place. This will again be updated when I wire in the plug either today or tomorrow.

As described earlier today the car went into S&R Pro in Penrith to have some custom piping made up. I am glad to say that everything went well and I am all smiles. As promised they had the work done by when they said, and after quoting $330-$380, the final bill came up to only $300. The customer service I experienced put most of the places I’ve been to to shame. On my first drive with the fixed piping, an intercooler hose blew off where Ricol had failed to put a bead or similar on a section of piping they added. I limped the car back, took out the pipe and a neat bead was welded on immediately free of charge. All I have to say is wow, they are highly recommended. Tomorrow in the daylight I will update with pics of the work done.

I have also just gotten off the phone to Unigroup, with the car booked in to commence tuning on Friday night. They will be keeping the car until mid next week to make sure everything is done perfectly. They will also be discussing with me in great detail the actual changes needed to get the big injector and z32 afm combo running. It seems Yavuz shares the same wish to educate others about ecu retuning as myself.

Businesses like these set the example for so many others to follow, with their customer service, manners and quality of work. I highly recommend either of them.

Today I booked in the car for a bit of work that will have it completely ready for tuning. Looking for somewhere local I was put onto S&R Pro in Penrith, who so far seem fantastic. I’ve been quoted $250 to have my new 80mm induction pipe made in aluminium to suit the z32 afm, as well as have the compressor outlet snorkel and joining piping modified to be perfect. They are also going to ultrasonically clean and service my injectors, as well as flow test them for $130 all up. One of the mechanics is ex-CRD (for 10 years) and has worked on cars such as GTR-700 and DEVLSH. Very promising indeed. Hopefully I can have the car tuned later this week at Unigroup.

Today I also picked up a POD filter adaptor from the z32 afm for $40 from Autobarn. I also got back my rear strut brace from the friend who was borrowing it during the rebuild.

Another point of interest is the experiment I had with the HKS gt2510. Not being able to resist playing I turned on the boost controller and fiddled until it was making 11 psi (up from 9 psi). At this point even with the boost leak the car feels almost identical to the t25g setup. When the leak is fixed response should edge out the old setup. And when 18psi is on board with a less restrictive intake, a good fuel system and proper tuning the car will be an absolute weapon. I’m very excited about having it tuned.

So to bring back an updated ‘To Do’ list from a few posts ago:

• Drill oil inlet fitting – Now done
• Fit turbo (should be an easy job indeed with the braided lines) – Not as easy as hoped but done
• Obtain Z32 sized pod adaptor – Purchased Today
• Have 80mm inlet pipe fabricated – Booked in for Monday 28th June
• Have injectors cleaned and flow tested – Booked in for Monday 28th June
• Wire in plugs in parallel for afm and injectors – Will do Monday or Tuesday this week

As we can see everything is falling into place.

A long but successful day in completing the turbo installation. I ran into problems in several areas, but each was worked out as I went and in the end everything is on the car ok. The worst was cross threading one of the oil fittings (the special custom one too), which required me to sit for over an hour be shaping the thread with a file and blade. I did manage to fix it in the end though. The other major problem was the compressor outlet snorkel fouling on the manifold in two places. A dodgy solution has been made for now but I will need a bit of work done on the intercooler piping before everything is right. The car is driving well and not too far off the previous performance despite only running 12 psi. Check out the updated version of Fitting a Bolt On Turbo.