Good to see the 1200 is still running. Shame about the problems I never had oil issues with the old engine but had never done any long tracks with the new engine. The Ca18 and Rb26 are very simaler in design in head and oil control.Both having overfilling oil in head/ breathing problems with high revs. There are several things to do when building RB engine to stop this problem probably same thing to do with ca18.I will be doign these mods to the GTR engine when she needs a freshen up. Anyway nice to see she is still competing and doing well.
Cheers Andrew

Hi Harry the exhaust is the same, thats the dorian timer you can see in the photo.

I think I may have helped the over heating by sealing off the whole front end and sealing the ic to the radiator now all the air has to go through radiator and ic(when I turn on the thermo fan you can place a peice of paper near the ic and it gets sucked on). It didn't get past 85 degrees although on low boost. I have taken off the oil cooler didn't like the hose clamps and the fact that it was a transmision cooler I will replace that soon. They have increased the hot laps from 3 to 4 plus the warm up and cool down, so 4 min 40 of flat out driving.

I too have had the turbo come off (twice) lost all your lock nuts and distroyed the gasket. I have now got some locking tabs from nissan (an oem part) if that fails a small tig weld tack on the nut and the manifold will stop them coming undone.

I am going to pull the diff apart before the next run because it is making a howling noise especially off throttle. I also have a heavy vibrition from the front left under light braking I have skimed the rotors re packed the bearings but have noticed alot oil around the damper so I have to pull that out aswell to check it out.

I have been speaking to some people about the same issues on the rb's a drain from the catch sounds like it might be the trick. Rb's would have to be the sweetest sounding engine on full song. There was a 260z with a rb25 in it as well as a couple of gtrs, what a noise.

I love this car even though it requires more maintance than RAAF jet fighter, my wife she doesn't have the same affection for it.

I'll pm you my address the lap top would be great as they sell avgas at the track I might be tempted one day to up it.

its looking good Jeff. Have you done another new exhaust for it? looks like a side pipe out through the sill?

that hose on the turbo outlet always felt a bit dodgy when putting it on, but it never gave me any trouble even on the higher boost.

Can't shed much light on the oil/breather issue either. I only ever really used it at hillclimbs = about 980m at a time & never had any problem. It always had a little bit in there at oil change times though.

The only times I took it to a circuit, it blew a diff on the first hot lap I ever did in it at Morgan Park. Then at QR it lasted about 5 hot laps before the turbo fell off. But it took 2 sessions to get those 5 laps out as it would also start to get hot after about one and a half laps... so I had to alternate between hot laps and cool down laps to keep the engine temp under control... This was all on the high boost (1.5bar or approx 23psi) tune Andrew had.

Going to 1 bar with a nice safe tune and pump gas sorted both the overheating and the turbo stud problem. I also milled the turbo manifold flange flat (it was about 2.5mm out!), helicoiled all the stud threads, fitted new studs and K-Loc nuts.

It then survived the Supersprints at Carnell with no problem whatsoever and ran 1st in class & 6th outright. It was a short circuit though, 4 laps of a ~1km track at a time. Not sure how many laps you do in a session over there?

its quite possibly an issue like the RB26 has - constant high rpm buils up oil in the rockers and can't drain back quick enough. Their fixes are an oil restrictor in the gallery to the head, and making an external drain to the sump.

If you want ever raise the boost back up, get some inconel studs first. Those metal lock nuts should be replaced every time too. which reminds me -send me your address again so I can post that laptop. I am soooo slack!

Harry

I loved the photos, so much so that I looked through the other 23 pages of photos. I saw the BMW pic's, not nice, but there's a nice sequence of you power sliding about page 16 or so. You must have held it, as all the other people seemed to get pictures of them ending in the sand. Hope the fix is an easy one.
The cheats way to see the other photos is to go into any of the photos jeff has put up & where it says >>ses_rd9_wroo>, click on this for the other pages. You can go back even further, some of the hillclimbs in WA look interesting.

Great to see you guys had fairly easy fixes for the same problem, sounds like it may be a faily common issue.
I would like to get the engine checked first just to make sure.

It was raining then dry, then raining then dry all day. It was fun but slow in the wet 1.23min I had to be very carefull with the throttle a good experince though.

Unfortunalty a BMW rolled twice in colb corner in the wet, thankfully he wasn't hurt. It is allways sad to see someones pride and joy get damaged. This is the chance we take though and better to keep it off the streets.

nice car you got there...did it rain at all while you where on the track? For some reason everytime i go on that track it bloody rains on me grrrr. Shame we didnt know you where running i am sure we could have got a few people there to watch.

Yep! I also had the same oil drama's in my CA powered at QR, Stupidly i had the catch can above the exhaust and i had smoke p!ssin out everywhere! i had to re-locate the catchcan on the other side and did the same thing as Matty, put a Fitting in the sump, worked a treat!

Looks like some promising results! Well done!

Hi mate
Glad to hear you had a good day in the coupe.
FWIW I used to have the same oil dramas in my CA powered ute at QR.
When we put the new motor in I had a fitting welded onto the sump with a baffle over it for the catch can to drain straight into. Works a treat.
Matty

Car looked good
I took a couple of pics
Never got to chat with you though

Good result for the day considering the weather

I finaly got to give the coupe a proper run on sunday after fixing the miss and the turbo drain line. I managed to get a 67.1 on the final lap and ended up 3rd in my class, outright open and closed over 2 litres (1c).
I was running brand new bridgstones re55, what a tyre!

results:
http://www.natsoft.com.au/cgi-bin/results.cgi?28/06/2009.BARB.Q1

With a bit more practice (it was really the fist time I have driven it with anger around the track) I should be able to get into the 66's and if all goes well maybe the 65's (would have to be going very well). At the moment I am running 15.5psi on 98 ron 255 hp, Andrew was runnin 20 something psi on av gas 308 hp. With that amount of power I should definatly get my times down but at the moment 255hp is plenty.

The day was not with out it dramas though, I had only got 1 full go at 4 hot laps out of 4 attempts. The hose clamps in the ic piping straight out of the turbo kept on blowing off very frustrating. I had to replace the big fat clamps for skiny normal clamps. It managed to hold together for the last run.

I also have a problem with the catch can filling up somewhere between 1 and 2 liters so much that after the 5the lap the oil preasure light came on for a brief second whilst cornering. I will be getting a leak down test to try and find out why. From what I can gather ca's have a bit of trouble draining the oil from the top whin under sustained high rpms. I have a bit of work trying to sort out this issue.

Next time I will try and mount a camera of some sort for a bit of video fortage. It was great fun hauling in an 5.8 litre xy down the staight.

photo of me
http://www.pbase.com/barnsie01/image/114363905

photo of 1st in class

http://www.pbase.com/barnsie01/image/114360995

photo of 2nd in class

http://www.pbase.com/barnsie01/image/114362291