Jump to content
SAU Community

Recommended Posts

It really comes down to who is tuning the car. Make sure your tuner is comfortable and very familiar with the ECU.

Personally I like the Autronic. As good as a Motec, but without the huge price tag and 'pay more for more features' bullshit. Autronic has everything available from the get-go.

Will the Microtech work with Nissan sensors, CAS, etc?

  Nosmo said:
It really comes down to who is tuning the car. Make sure your tuner is comfortable and very familiar with the ECU.

Personally I like the Autronic. As good as a Motec, but without the huge price tag and 'pay more for more features' bullshit. Autronic has everything available from the get-go.

Will the Microtech work with Nissan sensors, CAS, etc?

Like I said, 'Plug and play' lol........ just needs a vac/boost line from after the throttle body.

the thing about the individual throttles and the map sensor is that you need a vac line from after each throttle that then goes into one line.......

thats my understanding anyway (at least to get a good stable reading - you could grab it off one, then use a multiplication factor or something, but it never would be as right as a line from after each throttle)

if you havent yet, have a gander at this site

http://v8soarer.com/itb/index.shtml

guy did ITB's for his v8 soarer............

Yip, Toyota has the same on their itb's. I'll be running a vac line from each one for the MAP.

For the brake vacuum boost I'm going to fit a diesel Navara alternator. They run a small compressor off the back of them for the brake booster. :dry:

Interesting project, keen to see how it turns out. Certainly an unorthodox approach, especially given the car's purpose in life, but I wager you're a better judge of that than some bloke across the tasman on a computer!

  SKYPER said:
Triple 2 barrel side draught setup on a S20 motor -

http://www.datsunhistory.com/skylineeng.jpg

Thats an L-series six old mate, only one cam there!

Edited by floody

Personally i would be steering clear of the Microtech. I ran an earlier LT8 on my old RB20, ok not an LT12 and they were a bit crude in the fuelling dept. They were also very sensitive to voltage, which is still a common problem based on some cars i see running the LT12.

After a lot of time and effort tuning i was finally able to get some reasonable control of fuel, and on an NA car you want the fuelling spot on to give you that sharp throttle response.

I know it wil partly kill the sound, but have you considered a big fibreglass airbox for the inelt setup? Filtration will be easier to sort, an important thing for rally car. You can also throw a an AFM on the front of it after the air filter panel. I have seen similar setups on several 80s rally cars running injection. It also means you can run the std ecy re-mapped to your needs.

I love what you are doing, every time i service for a friend i sit in the bush listening to all the cars coming through and dream of building a basic NA RB20 GTSt rally car. The sound of the RB20 through the bush would be awesome.... :)

Its a bit late..

But my old man just pick up a 26 intake manifold for his 25det. I been looking.. could custom trumpets just be slapped up to ITB's on a 26 manifold?

Because then you can mate to the head.. TPS is sorted.. etc

Edited by GTS4WD

26 intake with the 4age throttles? Could work. Mate of mine works in the CNC machining industry, so I've just given him another homer to do.

We're going to dummy up some runners next week and see what we can make fit.

a guy i know has fabricated plates to adapt the RB26 throttle bodies onto the RB25 head... let me know if you are keen and i can put you in touch with him. actually i think he has a thread floating around here somewhere

Hmm, got a small problem with the itb's. The Toyota factory spacing is too different to the head ports on the RB. I was just going to take up the difference by using the intake runners to line them up but now we've got it in bits I don't have enough length to do so.

So now the linkages between the itb's need to be modified and a new flange made to suit. No biggy, we'll get there...

Here's a pic of the smelly old head and ports. Will be good to see a nice shiney head in it's place.

screaminrally057du6.jpg

  • 4 weeks later...

itbs007wy2.jpg

Also...

itbs008sn0.jpg

5 out of 6 fit!

Link ECU will be here in a day or two and the car is getting shipped back to the workshop where we can start:

Building the head

Re-plumb the coolant lines from the head.

Re-plumb the clutch master cylinder (that's why #6 don't fit)

Remove HICAS servo thingy

Wire in Toyota TPS

Plumb in MAP sensor

Move battery

Make new throttle cable

radiator

fan...

Oh god that's getting depressing!

Looking awesome mate!!

Roy: Microtechs were our ecu of choice, when wired up properly we rarely had any dramas with them, they have come along way in recent times, and for sheer bang for your buck i dont believe you can go past them for a full stand alone ecu once people get there head around the fact that not being plug and play for all applications isnt such a big deal. Customer service on the otherhand could do with some improvement.

Now that the ITB's are built and the dummy fitment has been carried out, we can get stuck in and remove all the stuff we no longer need, to make way for what we want.

Flicked out the radiator and took the stock head off the other afternoon.

itbsstrippedxi3.jpg

Now we can look into all the plumbing adjustments and flick some paint on the red bits.

My G4 Link ECU has turned up now too, so most of the bits I need to make it run are here.

  • 3 weeks later...

Yeah we're getting there slowly. We're all too busy to spend much time on it.

The engine bay has been cleaned and painted, I've re-plumbed the powersteering and removed the redundant HICAS pipes also.

I've prepped the block and should be fitting the head this week.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Update 3: Hi all It's been a while. Quite a lot of things happened in the meantime, among other things the car is (almost) back together and ready to be started again. Things that I fixed or changed: Full turbo removal, fitting back the OEM turbo oil hardlines. Had to do quite a bit of research and parts shopping to get every last piece that I need and make it work with the GT2860 turbos, but it does work and is not hard to do. Proves that the previous owner(s) just did not want to. While I was there I set the preload for the wastegates to 0,9bar to hopefully make it easier for the tuner to hit the 370hp I need for the legal inspections that will follow later on. Boost can always go up if necessary. Fitted a AN10 line from the catch can to the intake hose to make the catchcan and hopefully the cam covers a slight vacuum to have less restrictive oil returns from the head and not have mud build up as harshly in the lines and catch can. Removed the entire front interior just shy of the dashboard itself to clean up some of the absolutely horrendous wiring, (hopefully) fix the bumpy tacho and put in LED bulbs while I was there. Also put in bulbs where there was none before, like the airbag one. I also used that chance to remove the LED rpm gauge on the steering column, which was also wired in absolute horror show fashion. Moved the 4in1 Prosport gauge from sitting in front of the OEM oil pressure gauge to the center console vents, I used a 3D printed vent piece to hold that gauge there. The HKB steering wheel boss was likely on incorrectly as I sometimes noticed the indicator reset being uneven for left vs. right. In the meantime also installed an airbag delete resistor, as one should. Installed Cube Speed premium short shifter. Feels pretty nice, hope it'll work great too when I actually get to drive. Also put on a fancy Dragon Ball shift knob, cause why not. My buddy was kind enough to weld the rust hole in the back, it was basically rusted through in the lowermost corner of the passenger side trunk area where the wheel arch, trunk panel and rear quarter all meet. Obviously there is still a lot of crustiness in various areas but as long as it's not rusted out I'll just treat and isolate the corrosion and pretend it's not there. Also had to put down a new ground wire for the rear subframe as the original one was BARELY there. Probably a bit controversial depending on who you ask about this... but I ended up just covering the crack in the side of the engine block, the one above the oil feed, with JB Weld. I used a generous amount and roughed up the whole area with a Dremel before, so I hope this will hold the coolant where it should be for the foreseeable future. Did a cam cover gasket job as the half moons were a bit leaky, and there too one could see the people who worked on this car before me were absolute tools. The same half moons were probably used like 3 times without even cleaning the old RTV off. Dremeled out the inside of the flange where the turbine housing mates onto the exhaust manifolds so the diameter matches, as the OEM exhaust manifolds are even narrower than the turbine housings as we all know. Even if this doesn't do much, I had them out anyways, so can't harm. Ideally one would port-match both the turbo and the manifold to the gasket size but I really didn't feel up to disassembling the turbine housings. Wrapped turbo outlet dumps in heat wrap band. Will do the frontpipe again as well as now the oil leak which promted me to tear apart half the engine in the first place is hopefully fixed. Fitted an ATI super damper to get rid of the worn old harmonic balancer. Surely one of the easiest and most worth to do mods. But torquing that ARP bolt to spec was a bitch without being able to lock the flywheel. Did some minor adjustments in the ECU tables to change some things I didn't like, like the launch control that was ALWAYS active. Treated rusty spots and surface corrosion on places I could get to and on many spots under the car, not pretty or ideal but good enough for now. Removed the N1 rear spats and the carbon surrounding for the tailpipe to put them back on with new adhesive as the old one was lifting in many spots, not pretty. Took out the passenger rear lamp housing... what do you know. Amateur work screwed me again here as they were glued in hard and removing it took a lot of force, so I broke one of the housing bolts off. And when removing the adhesive from the chassis the paint came right off too. Thankfully all the damaged area won't be visible later, but whoever did the very limited bodywork on this car needs to have their limbs chopped off piece by piece.   Quite a list if I do say so myself, but a lot of time was spent just discovering new shit that is wrong with the car and finding a solution or parts to fix it. My last problem that I now have the headache of dealing with is that the exhaust studs on the turbo outlets are M10x1.25 threaded, but the previous owner already put on regular M10 nuts so the threads are... weird. I only found this out the hard way. So now I will just try if I can in any way fit the front pipe regardless, if not I'll have to redo the studs with the turbos installed. Lesson learned for the future: Redo ALL studs you put your hands on, especially if they are old and the previous owners were inept maniacs. Thanks for reading if you did, will update when the engine runs again. Hope nothing breaks or leaks and I can do a test drive.
    • No those pads are DBA too  but they have colors too. I look at the and imo the green "street" are the best.
    • I’m not sure what happened I told them about sonic tunes free OTS tune and the next the I know .. I was booted..   To funny 
    • Yea - I mean I've seen my fuel pump which is decades old and uh, while I'm not saying this with real knowledge... but I sure get the ick at using anything in the fuel system that produced the state of that pump. Many years ago I went through multiple pumps (and strainers) before I dropped the tank to clean it out with extreme violence. I'm talking the car would do maybe 50km before coming to a halt, which resulted in me cleaning out the filter with some brake cleaner and going on my way. None of my stuff ever looked like what came out of your fuel tank. I don't think I'd be happy with it unless every single component was replaced (or at least checked/cleaned/confirmed to be clean here).
    • I'm not going to recommend an EBC pad. I don't like them. Just about anything else would suit me better. I've been using Intima pads for a while now.
×
×
  • Create New...