DIY install 99% finsihed. NOW WITH PICS!
 

Hey guys.

I have been installing my kit on the weekend an in the evenings this week. :bigtu: :yippee:

I went for the first test drive last night - low timing and running rich for safety, man, this is SOOOO FUN! :bowdown:

The kit:

t25g
ebay stainless mani
diy dp
emanage blue (not tuned yet)
305cc supra injectors
ebay front mount with alluminium piping and silicone bends.
rx7 afm...

So simply, yet so effective. I haven't been taking many photos cause i'm up to my elbows in grease, but I just wanted to share! :cool:

Something I want to know is: I have a wideband still to install. Should I run it all the time along side the stock one, or do they deteriorate quicker than the stock ones? I have a Digital A/F ratio guage (the autospeed/jaycar one) which I want to use for tuning, but I don't know if I should leave it in there, or only put it in when tuning is required.

What do you guys do? :sadwavey:

60AGS

I have my AEM wideband installed all the time. Good to monitor how your tune is doing for varying conditions that you might drive in or under. The only deteriorate faster if you have them close to the turbo, they get too hot. Should be about 3' from the turbo.

Thanks! So back near the cat is a safe bet then?

I'll weld the second O2 female in tongiht then! :yippee:

Man I love this car. I drove it without the hood on and no mid pipe (just dp!) :bigtu: Geez it sounds good!

Yeah you want the sensor a minimum of 10* above horizontal otherwise moisture will collect on it. You have to place it before the cat obviously, for example mine is about 7" before the test pipe flange. Nice to hear the car is running, get some pics when you get cleaned up.

I have the stock one only about 6" after the turbo, is that gunna kill it? I've just realised that it's pretty close too...

I'll get some pics asap.

60AGS

I just installed my wideband recently. I welded the bung 5 or 6 inches before the cat. Seems to be working fine for me, except there seems to be a bit of a delay in the readings and im not sure if that is how far down the pipe it is or if it is because I am running the stock ecu with only an AFPR and an Throttle body from an automatic which seems to not work right with the ecu because im reading stoich on decelleration.

Anyways, i think its better to install a bit downstream from the turbo and running every day should not be a problem other than maybe needing a new sensor in 4 or 5 years.

just out of curiousity, how is the response of your gauge when it is closer like that? I feel like I might be getting a bit of a delay, or maybe not. When i step on the throttle, it seems like it does not adjust immediately. maybe thats normal idk

Having your stock sensor there will also damage it I believe, I could be mistaken though. My stock sensor is about 1.5 feet away. Though i'll be removing it entirely eventually.

When under heavy accel i get fast readings but if i'm decelerating or i just jump on the gas real quick my readings will jump around a little, like it takes a second for things to even out for it to get a good reading. We have similar WB sensor placement.

yeah, same thing here. You have a test pipe right? I was thinking possibly the backup that the cat creates could cause some issues with getting a good reading but if you are seeing the same thing with a testpipe, i doubt that its affecting it. You know, its probably completely normal and I am just ----.

Yep no cats for me, i'm allergic.

Ahh crap. It's a really nice weld too! :mad:

my stock sensor used to be 2-3" inches from the turbo (as are plenty of of members here), they can stand the heat better than the wbo2s. dont worry about it.

Glad to hear it, I was never sure of how "strong" they were compared to the wb sensors.

BTW:

https://www.miataturbo.net/forums/at...1&d=1140031380

^ Its true you know.

Yes, it is true. Fuck it, better get some pics soon then... :D

I have EMB issues though, so i'm not exactly doing this atm: :yippee:

60AGS

Well, what can I say. I started putting time and effort into a turbo kit on the 7/9/06, and turned the key on the Wednesday 14/3/07.

I wanted to be on the road the whole time, so I had to collect little by little.

Fast - Cheap - Reliable: Pick any two. This is the formula for modifying a vehicle. I chose cheap and reliable, so I'm never going to be pushing 150rwkW out of this baby, or dragging Skyrines from the lights while both wheels scream with smokey pain...

What I wanted: low down torque, and enough power on tap to be able to overtake when you need to (for road driving, that is the only reason to go FI IMO). The track is another story! :bigtu:

I started looking for bolt on kits, but nothing anywhere near my price range included an intercooler. :td: A must in Brisbane heat IMO if I want "reliable" to be my choice. The more I looked, the more I realised that a lot of those kits were missing essential parts, or contained parts that would need replacing. After finding www.miataturbo.net I decided to build a DIY kit with what the parts I wanted to have, at about the same price as pre-built kit from GReddy. Obviously my power goal was to match the stock GReddy kit, (so, nowhere near "fast") but produce that power more safely with an intercooler and a better fuelling system.

The basics:

T25g turbo from an SR20det from a 180SX
GReddy eManage piggyback - fuel and timing control, as well as a very cunning closed loop device for while on boost
EBay intercooler
89 Toyota Supra 305cc Injectors
Heaps of custom stuff (fabbed with the help of several very good mates! :D )

Here are heaps and heaps of pics (some are of the same thing) that are in no particular order.

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/b.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/c.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/d.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/e.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/f.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/g.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/a.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/h.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/i.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/j.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/m.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/n.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/o.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/p.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/q.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/r.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/s.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/t.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/u.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/v.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/w.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/x.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/y.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/z.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/z1.jpg

http://www.hotkey.net.au/~gmarsh/my_mx5/turbo/z2.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo02.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo03.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo04.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo05.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo06.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo07.jpg

http://mx-5.sabretooth.id.au/temp/go...agsturbo08.jpg

:yippee:

Not tuned yet, so no reports on seat of the pants performance. I'll add updates when they happen. Having eManage issues. :td: :confused: :sadwavey:

60AGS

:jerkit:

looks like a pretty nice setup. I bet you can go fast with it :)

I have a stock clutch and a stock diff. Tell me I can go fast Braineack. :gay:

Update and pics.
 

UPDATE.

After an hour or 2 of a friend's time last night, the tuning computer had updated emanage software.

Did it fix the problem? No. :vash: :vash: :vash: Fecking eManage still doesn't log RPM, it just reads "0rpm".

So anyway, I was driving home tonight on a 2 lane road with no one around me. I wanted to know just how bad the stock computer would be at fuelling the increased air flow. I dropped into 2nd in a 50 zone and slowly excellerated (without any boost) to over 4000RPM (out of closed loop). The a/f ratio immediately dropped to 14.5:1 (from 14.7:1 in closed loop). This is correct, cause of the bigger injectors and no extra air. I slowly opened up the throttle to increase the boost pressure to ~0. The air fuel ratio stayed at around 14-14.5:1. I slowly gave it a little more = ~1-2PSI, and the a/f ration didn't start to lean out, it started to get richer... :eek5: I gave it a little more (still travelling well under the limit with noone around me). At around 3-4PSI the a/f ration dropped to 11:1... So I gave it a little more... r. That is what my gauge says when it is off the scale rich.

I thought it must be because I eased it on and the computer had time to keep up with it. I went back to vac, and then eased the throttle all the way to the floor. The redline comes at you very quickly with just 6PSI... :cool: A/f ratio went almost instantly to r.

I got off it again, slowed right down and just stomped on the loud pedal. :eek: :eek: :eek: :bowdown: :bowdown: :bowdown: :yippee:

I was a giggling mess. The a/f ratio was rich as all hell all the way to redline. I have been pussy footing it all week thinking that I was going to be running lean.

When I got home I pulled the AFM off and leaned it out a click. Put it back in and went for a spin.

In boost, the a/f ration stays between 11.5 and 13 unless I'm at WOT, where it still just says "r". :bigtu: Perfect.

Now I just need to fix the bloody eManage so I can up the timing when not in boost! :sadwavey: :crx:

:cool: :cool: :cool:

Very happy camper.

60AGS

Did you buy the Zena Racing couplers from ebay, or direct from their site? I've been looking at their site, but nervous about the seemingly ridiculously low prices. Love to hear your opinion of dealing with them!

You have keep on to them, but I bought all my couplers there, and yes, they were ridiculously cheap.

:bigtu: for Zena Racing - www.zenaracing.com

60AGS

Thanks, good to know. I really like your setup!

If you are running 10.0 a/f or less (gauge reading 'R') at WOT you're losing power because you're too rich.

Running too rich is not a good thing, get that emanage working and lean it out at WOT.

Those are great pictures! It had me going for awhile as I could not fiqure out how you fit all the stuff in there when I had tried it that way and no way. You seemed to have so much room ..... duh RH drive car might explain it.

dude awesome thread, i'm gonna ask you alot of questions when i start mine, really great pictures...

Efini - 100% correct. I have it tuned like this just until the emanage is running.

Thanks guys, feel free to bug me. :bigtu:

60AGS

very good looking DIY kit!
:bowdown:

nice work buddy!!!! man I can not wait until school is over to start messing around with mine. I'm doing a diy setup centered on the same manifold you have but im staying with a mitsubishi style t25.

good looking on the turbo adapter plate, you will be able to help alot of people out with those pics.

im curious to see how durable these thing gauge manifold are. we'll have to see.....

have fun!

anthony