murrayis

Thanks for the sujestion, oil galleries are clearminiture cameras are awsome lol I fed some oil into the hole in the damaged area and removed a lifter and looked up the oil gallery with the camera and the oils came straight out. I think I know what caused this failure. I notised the cam belt was tight the other week after setting it correctly so i adjustened it again and this mornign when we took the belt off it was really tight again, my thinking is it was putting too much downward pressure on the front of the cam at too higher rpm's 7000+rpm causing the cam to dig in and deposit what it dug out on the cap as you can see. Now if this is the case I need to work out why the tension on the belt keeps changing. Any Idea if this could be possible? My reasoning behind this is... Seeing its running in oil with the added downforce on the front of the cam the oil couldnt handle the pressure making it usless thus not providing sufficiant lubrication.

I am not sure about the gaps in the rings as I didn't do that part of the build, but I am sure they were. When we pulled the cam there was oil on the face which wasin contact with the damage, and I pushed a good 30cm of plastic tube down into the oil feed hole to check to see if it was blocked and didnt see any problems. I am stumped to would have caused this my thinking was no oil supply, The head gasket is a RB20DET TOMEI 83mm unit and from memory when i Lined it up with the standard nissan gasket to check the oil hoels etc they were both spot on the money. Cameron

Well we went at it this mornign to remove the head, but in the process of lining up the cams so we could get at the head stud nuts we noticed it was taking alot of effort to sping the cam shafts so we decided to remove the cams to check it out... Intake cam was first... no major marks all the usual little blemishes some the new cams running in. Exhaust cam was next removed all the caps and when with lifted the front most cap we found this! We lifted the Cam out no major marks on the cam thank god! and the bottom side of the head we found this We are looking at maybe taking the head off and getting it line bored after we take too it with some 1000+ wet&dry to clean of the bores to see if there is any deeper damage. This had both of us scratching our head as to what has caused this! If anyone has seen this before please let me know etc. All the caps were torqued down to manafactuer specs in correct order etc. Cheers Cameron

Yea when we got the car home, we started it to have a listen while it was quiet and the noise definetly sounded like it was high up in the engine. I converted it to a Solid lifter setup so nothing should fail in there... Only things I can think of is a shims come off or a valve guys failed or a bent valve.. its jsut strange seeing there was ear to no blow by out the cam breathers then on the third run the loss of 20kw and alot of blow by so air was mixing with oil somewhere... I'll update it tomorrow once we pull the head of in the morning. Fingers crossed its nothing major!

Time for an update. Today was the day that has been two years in the making... 7am picked up the car trailer got down to B.E.S.T performance who we had hired the dyno from strapped the car down all was running sweet. After 45 minutes of getting the fueling correct we did a run and made 164kw on 6.3psi adjusted the fueling a little more 197.6kw on 6.3psi... and thats when the postive mood got shot down. Third run something was wrong the entire run was 20kw short of the previous... lots of blow by coming from the cam cover breathers.... Ticking sound.... All I could think of was... Bearing... Got the car home checked the plugs... no oil on them..started her up for a second ticking sounded like was in the head... Tomorrow we will pull the head off i just hope its nothing major!

Yea Kyle will look after you hes a top Bloke

I have a spare welded 4" donut in brisbane if u need it bought it ages ago and never used it, got it from JNT Performance

Nope it doesnt, the GTST item is fairly long and the GTR sender is very short. the GTR sender is mechanical and all hokked up just need to adjsut the speedo, I dont mind if the speedo is showing higher than the actual speed but would like it to be as close as possible if possible.

noone knows if these figures sound correct for a gtr box in a gtst?

Hi, Well I have just completed my new build topped off with a GTR gearbox, I retained the r32 gtst diff. I am trying to work out the speedo difference so I can set it in the RSM. Using a gear calculator I worked this out: ------------------------------------------------- ----------1--------2--------3---------4-------5 ------------------------------------------------- 10----1158-----693----469------360-----271 20----2315----1387----938------720-----542 30----3473----2080----1407----1080----812 40----4630----2773----1876----1441----1083 50----5788----3466----2345----1801----1354 60----6945----4160----2813----2161----1625 70-------------4853-----3282----2521----1896 80-------------5546----3751----2881----2167 90-------------6239----4220----3241----2437 100------------6933----4689----3601----2708 Does that sound correct the Speed = RPM? Cheers Cameron

Nissan At indroopilly is where I get all my parts from, their spare parts department is at Darra.

Looks good Great work Kate!

Any mods etc done to it? Heres the ignition map of a stock rb25, by no means follow this as it could cause damage to your engine as the fueling will be totaly different!

Yea 4age pistons fit but are $300 each... and are 2mm short of the deck, by the time your done its cheaper to get a custom set. my head was ported out nicely to suite the 2.4ltr...

lol I will say Search for rb24 I have just finished building one myself. The rods and crank fit, but you need custom pistons and re bore the block to 82 or 83mm depending on the pistons you choose mine went from 1998cc to 2438cc

You can be the judge of that Idle Sounds a little meaner than the average rb20! Clicky Clicky!

Thanks Benji

Not sure still trying to find out..

Trent, GCG said smallest they had was 3" havent tried MTQ yet.

Nope... Its a very high price for 1 Clamp! would expect it to be around $20 for jsut the clamp So I am still looking around before I go out and buy that one.

Thanks for that Lead Spoolup, Rocket have them for about $65 each delivered...

I was in the same boat but never found a place online, so went to my local exhaust shop and picked some up cheap. If there isn't on near by call one and see if they can post them too you

Aight i'll give them a call

Another dead end Didn't really want to know or care he said the smallest they have is 3"

I did, i'll give them a call Thanks