Jump to content
SAU Community

Recommended Posts

The cam covers are from an RB30 and seem up to the job.

Unfortunately Dale I don't have any photos of the aero on me. Might have to come see the car at World Time Attack :P

Hey guys once again I've been pretty slack and have not updated my build thread... ("Plan B" Another thread)

Been busy at work and trying to get the car ready...

John Boston will be doing a few sessions and I will be doing the rest... So the car will hopefully set some decent times and then ill have some fun!!

I will post up some more updates and photos over the next few days.

Edited by JohnGTR
  • 2 weeks later...

Tunehouse have committed to assisting me to get te car ready and John Boston is helping with the setup so it has gone from a "Oh, Yeah lets just get the car out there and have some fun" to a "Let's try and get this sorted out properly" type attitide...

Still have a long todo list on the car... Here is what is happening:

- The fuel pump setup is being revised and we found that the foam in the tank was deteriorating (e85) and bloking one of the lift pumps. We also found the the primary (single) pump was locking up and failing. We had fuel pressure issues during the first test ewith the new box.

- After a weeks worth of emails and correspondents with the Precision Turbo guys I have ordered a new smaller turbo to try and give it a few more herbs down low. John Boston did not like the power out of the slower corners. The car made 500+ kw atw on low boost setting. Making power is not a problem !! The theory is, smaller turbo, faster spool, more power earlier in the rev range but then wind it up top and still make the power. We need more power to push the car through the air down the straight... 260 Km/h is not quick enough.

- Having a good close look over the Motec configs found some interesting settings which we need to sort out and a couple sensors are ot working properly.

- Need to secure front bumper and diffuser, dragging on the ground after 250 km/h and clean up aero.

These are the major things but I have a a lot of little things to sort out as well ...

I am hoping to merge this thread with my original thread (Plan B Track Toy) ...

Thanks Duncan, can you change the title to "R32 GTR getting ready for WTAC @ Tunehouse" ?

Actually John Boston never drove the car previously, he had a sister car which was well underdeveloped compared to this one. He drove it for the first time at SMP when we took it out for its first run with the Holinger...

Getting pretty eager to get it out there again !!

I know how a hub dyno works, you should be making peak torque at around 5000-5500rpm not 7500rpm. Something is causing you to lose a lot of mid range power?

PS. How do the RB20 Nics covers go with blow bye?

Why should you be making peak torque at 5000 - 5500rpm? I know this this would be better and we are looking to address this with a smaller turbo but the car just loves to make the power and torque up top with the current setup ...

RB30 covers seem to work fine and getting no blow by but do have a dry sump setup !!

It actually got tuned with e85, a bit more boost & timing all the usual stuff... Its not really being pushed but as per above posts its not making the power down low which is where its needed...see how we go with the new turbo!!

Edited by JohnGTR

Here is a video from the first test at SMP ... John Boston driving the car for the first time with the Holinger, this was his first lap at what he says was at 70%... We are trying to fastrack the development of the car and sort out all of the gremlins, having John help us with this is such a bonus...

Why should you be making peak torque at 5000 - 5500rpm? I know this this would be better and we are looking to address this with a smaller turbo but the car just loves to make the power and torque up top with the current setup ...

RB30 covers seem to work fine and getting no blow by but do have a dry sump setup !!

On a engine like yours torque should peak around when full boost is first reached and then hold (maybe trailing off a little) until redline. The torque/power graph posted looked like boost was creeping throughout the the range... Have you got a boost plot?

Also they are RB20 NICS covers... RB30s are single cam engines

On a engine like yours torque should peak around when full boost is first reached and then hold (maybe trailing off a little) until redline. The torque/power graph posted looked like boost was creeping throughout the the range... Have you got a boost plot?

Also they are RB20 NICS covers... RB30s are single cam engines

Correct... We will be looking at the wastegate spring and boost control to try sort this out ...

What new precision turbo will you now use to get power on sooner?

A smaller one than the 6768... Is that a good enough answer?

I've been in contact with the Precision guys and they made a recommendation but we have gone for a slightly different one and we've ordered it with two different exhaust housings so that we can play on the dyno.

Well actually no, as it didn't answer the question. But wish you well.

A smaller one than the 6768... Is that a good enough answer?

I've been in contact with the Precision guys and they made a recommendation but we have gone for a slightly different one and we've ordered it with two different exhaust housings so that we can play on the dyno.

Well actually no, as it wasn't an answer. But wish you well.

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...