Jump to content
SAU Community

Rb20de Itb Build

screamin'
 Share

Recommended Posts

  • 2 weeks later...
  • Replies 88
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

screamin'
screamin'

It's been while coming, but I have started work on the engine build for my rallycar. The car is an R32 GTS Coupe. I run an RB20DE in stack form with some basic breathing mods. Now the time has come

screamin' Collaborator

screamin'

Posted
  • Author
Posted

Fired it up this morning.

(typical crap sound quality due to engine noise)

It's all untuned and just running on the start-up mode, hence the big lumpy idle. It wont take throttle yet, but at least it runs under it's own steam.

screamin' Collaborator

screamin'

Posted
  • Author
Posted
What ID are the toyota throttles?

42mm.

The tune on Thursday will just be a temporary measure, so that I am able to run the car at a test day on Monday to find all the problems before going to the final tune and dialing up the cams fully. Just want to be able to turn the wheels again, been a long couple of months.

MBS206 Grand Master

MBS206

Posted
Posted

I have to ask, with your choice of ECU, does the Link do a lookup comparison between MAP and TPS?

With ITB, you'll find that at different throttle positions, you get the same pressure behind the throttle body (Headed for the motor) but, you're actually getting different air, especially since you get a lot of air turbulence.

This is where you'll LOSE out on your throttle response, and get a drop in power, if it's not able to be tuned properly.

The Adaptronic which was mentioned earlier, does exactly this. The GTR doesn't have to worry about anything of the likes until you go MAP sensor on it. And then it sees the exact same issue.

Also to the person saying the Adaptronic runs unreliable drivers... I'd like to ask, SINCE WHEN?

screamin' Collaborator

screamin'

Posted
  • Author
Posted

Just a quick update. No pic's/vid's at the mo, haven't got time.

The car is up and running. Has much more torque, good throttle responce and sounds awsome!

Ran the car at two gravel hillclimbs on the weekend and found the extra torque very usable off the turns.

My mate is currently making some longer trumpets based off the info from the dyno run. This will mean we can dial in a wider power band from the cams and complete the tune. In the meantime I'm jut getting on with racing the thing again.

  • 1 month later...
screamin' Collaborator

screamin'

Posted
  • Author
Posted (edited)

I've done a few events with the ITB setup now and I have been very impressed with the results.

The car pulls much stronger in the mid-range, which is where I need it and it still rev's out easily to 8k. The throttle responce mid corner is instant and I am able to use more control when I'm looking for grip and there are no flatspots anywhere in the rev range from 3500rpm on.

The video below is of a steep hill we ran up a couple of weeks back. Compared to last year, I found it far more driveable and easier to keep momentium.

http://nz.youtube.com/watch?v=pjSTmw_WWqs

Still more tuning to be done, so hopefully with a few adjustments I'll have a wider powerband to play with.

picture001smlzy8.jpg

Edited by screamin'
  • 3 weeks later...
Silhouette-R Enthusiast

Silhouette-R

Posted
Posted

What power did it end up making and what torque?

Do you have a dyno graph?

Sounds really nice, good to see people doing something out of the mainstream and the engine bay looks really neat.

screamin' Collaborator

screamin'

Posted
  • Author
Posted

Don't have figures for the torques or ponies, wasn't too fussed about that and at the end of the day numbers don't mean much on gravel.

It has great midrange torque for a 2ltr and this makes the car far more drivable and controlable through the corners, when compared to the same events last year.

Why would itb's be illegal, unless you guys have some emission controls or something over there, which means in that case my SS is illegal too.

After the first event the engine bay is now really dusty, so it didn't look that good for long!

  • 4 months later...
screamin' Collaborator

screamin'

Posted
  • Author
Posted

Been running it for a while now. Car is going real good, had a couple of 1st in class (1600-2000cc) and a 1st two wheel drive on one hill climb. Good to be beating the Escorts and Tereno's.

Got a couple of short vid's of last weekends rallysprint. Day started off at -5°C and didn't get much warmer!

Some photo's. Check out the frozen road!

http://www.colourandlight.co.nz/galleries/...ne09/index.html

  • 2 months later...

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Erelyes
      Ceramic turbine damage to engine - what did yours do?

      By Erelyes · Posted

      Ha, well, it's been.... a bit of a journey. Things have taken much longer than I'd hoped. I'll probably put up a thread at some stage. Hopefully soon. The car's not done any kms since my update in June though, put it that way.
    • Dose Pipe Sutututu
      M35 Aftermarket Fuel Pump

      By Dose Pipe Sutututu · Posted

      Here's the chart for fuel pressure vs. current draw, assuming your base fuel pressure is 3 bar and you run like 0.5bar boost on WOT, you should only momentarily hit 9amps here and there. (Ignore my prev post, I cannot read a chart these days it seems)
    • GTSBoy
      RB25 Drama's

      By GTSBoy · Posted

      Those comp test results are not hideous. Whether they are accurate or not (ie, when that comp tester says 140 psi, is the real pressure120, 140 or 160?) is unknown to us. The state of the battery used to crank it over is unknown, etc etc. Many people around here would say that the absolute values and the spread are perfectly fine to just add boost and keep going. I personally would be happier with a narrower spread than that, but even the diff between 125 and 145 is not terrible. That one cylinder at 125 though, has probably copped some damage relative to the others. You should inspect the valves seeing as you've got it open. Do you know how to measure installed ring gaps? That, and an inspection of the rings themselves, is how you will determine whether they need to be replaced. If you're not good to do these things, take the block and the pistons and rings to a shop that is, and ask them for the go/no-go on them. Do the bores need a hone at all? If so, you might well be justified in getting some different pistons in order to get away from the ring supply problem. Whether you're happy to spend a lot more money right now, on more gear, rather than less money, but an amount that looks stupid given that you will only get a handful of rings in exchange for that money, is for you to decide.
    • iain_ST44GA
      M35 Aftermarket Fuel Pump

      By iain_ST44GA · Posted

      also possibly backed up to my filler and shat down it! 🤣
    • Julsmadrid
      RB25 Drama's

      By Julsmadrid · Posted

      Ok so i would love some advice here please, i purchased an R33 a few months back and its had a few mods done to the engine, its an RB25det running a Master ECU, 1200cc injectors, bigger turbo, oil cooler, oil filter relocation kit, Spool H-beam rods, acl/ross pistons. When i removed the motor from the vehicle (as its getting a respray) i thought i would compression test it and these are the following results. Cylinder 1-145psi, Cylinder 2-143psi, Cylinder 3-125psi, Cylinder 4-145psi, Cylinder 5-140psi, Cylinder 6-135psi this test was done with the motor on the ground and powering up the starter motor. I dropped the sump and found broken oil squirters on cylinder 3,5 and 6. I was told my rings are probably worn so i stripped the motor completely to get a new set of rings for it. The trouble is no one has these rings anywhere and they have to be custom made by Ross over in the states and will cost about $600+$200 delivery. My question is how can i tell if my rings are at fault and if they are still ok and is this price ok for a set of rings?
×
×
  • Create New...