R33 Rb30 Conversion

[GTR-Ben]

Finally got around to getting some pictures of the dry sump setup in the race car....its still not finished yet...but its making progress. We gotta mount the ally pipes under the car after i tig on the -16 ends and then mount the tank and finish off that end of the hoses...check out the mass of speedflow crap!

Last one is just a new power steering reservoir i fabbed up. Shiny!

Fun making that all fit. Try it with 2 more lots of fittings on the pump. Nightmare.

[Scooby]

so does anyone think it could be anything else the symptons are no smoke in 1st 2nd or 3rd hit about 120km in 4th and she just blows smoke absolutlely every where and will continue to trail smoke in 5th, after this it will some times blow smoke in lower gears but only when giving a squirt, it seems to run quite well untill it dumps all the oil in 4th, any chance this could be a problem with the way the motor was setup? or most likely valve guides.

if it is valve guides is it worth while to upgrade to gtr valve springs or are the r33 rb25det springs more than adequate? and lastly on head gaskets any dramas with a nismo 11044-rr590 Gasket Cylinder Head - 0.9 mm x 87mm

try doing leakdown test, that might provide some clues but won't show worn guides. if its a bit of an unknown quantity it's worth checking as much as you can so you know what you've got. if the mech says valves then I'd go with that, if it's still at the same place those guys seem pretty good . gtr valve springs are not as good as a set from Performance Springs for $250. nismo or cometic metal head gasket will be fine as long as it's the right thickness. head off will give you a good opportunity to check CR also, no point running 7.5:1

as R33 racer said oil returns are gravity feed and can cause problems if not plumbed correctly. all of the hoses should facilitate flow by 'pointing downwards' if that makes sense ie don't have a hose that tries to make the oil run up hill.

[Bl4cK32]

valve guides only blow smoke first thing in the morning as the oil drips down overnight then burns off when u first start the car in the morning. If it was valve stem seals u shouldn't see smoke after that initial start.

This was one of the reasons Cubes and myself spent extra to get the head recon'd before the bottom end was built. No point having a fresh bottom end then slap on a 100k+ old head on it

Try a leakdown test, then look at the turbo.

Edited December 23, 2006 by Bl4cK32

[Adriano]

If the inlet valve guides/seals are worn, it will blow smoke when accalerating after decel, such as after going down a long hill, as the inlet manifold vacuum sucks the oil past. Exhaust guides/seals will blow smoke on startup, but not leave any residue on the plugs. Is there oil in the intercooler piping, any residue around the exhaust housing. Have you done a comp test, or is there much blowby out the breather under load?

[Darkon]

yeah there's plenty of oil in the intercooler piping, i've also changed the turbo over with another stockie that was the first thing i did and yeah didn't fix it.

The car is running quite well needed a car to drive the other day but on a 30min return trip it went through heaps of oil which was surprising cos it's wasn't blowing to much smoke, put a bottle of stop smoke in it just for the hell of it and it's has actually lessened the smoke but it's still quite bad so it got parked straight back in my drive way

the oil line from the head is pretty much a straight T into the turbo return line the oil never travels up only horizontial but it does have to do a 90 degree turn

[Rolls]

Stop smoke!!!!

That stuff is like honey man, quick do an oil change.

[@irborne]

had my mechanic drill and tap the head, then put a grub screw inplace of the original vct feed, then drilled and tapped into the front of the gallery behind the inlet cam gear and put a fitting in there for me, all i need now is some braided line to go from the oil hole behind the oil filter to supply it with oil, as the rb25 oil cooler assembly houses the std oil pressure sender, where as the rb30 used the hole behind it.

dont have pics here though

did you have to weld shut the oil feed port on the block, and did you modified the coolant port on the block to match the r33 rb25 head?

[Adriano]

Which oil feed port? There isn't one thats the problem.

[@irborne]

Which oil feed port? There isn't one thats the problem.

i meant the oil feed vct port bottom side of the head, do you guys welded it shut??

[r33_racer]

yes...welded the oil feed and welded up part of the water port to match the headgasket so it has more surface area to seal on as its abit thin in that section.

[Adriano]

I tapped it and put an M8 grubscrew in it, then put a bit of araldite in it to make sure it sealed so the head didn't need to be milled

[Craved]

i grub screwed the head, but have left the oil feed open on the block, any chances this will lend it an oil leak as there is still an opening in the gasket (rb25 head gasket)

????

[kaige]

guys i need some help with find a bloody timming belt, ive try'd just about every place in australia.

Ive put my second tensioner in stock position, motor is together so i dont want to drill and tap holes.

All i need is a timming belt: 1200 long, 150 Teeth with a 8 mm pitch 25 mm wide to fit on the rb cam / crank gear.

Sound symple? well its not!

The gates powergrip 1200 8mgt belt is an industrial belt and does not fit on the cam and crank gears. All automotive belts have a tooth number but no length and no pitch information... so how the F$@* do you find a belt?

P.S Both the bosch and Dayco belts on the SAU PDF are 152 tooth for use with relocated tensioner

Edited December 28, 2006 by kaige

[shanef]

jump on the phone tomorrow and ring an engine builder (john hill from JHH Engineering for instance) and ask them. they should be able to help you out

[Bl4cK32]

wouldnt the extra effort of finding a special belt make it worth the small hassle of drilling it and getting the belt everyone is using?

[kaige]

Ive spoken to john, he cant get a timing belt to suit stock position either... its looking like im going to have to drill a hole

[Cubes]

I think I will scrap the powergrip belt mention in the rb30det guide.

If the tooth isn't suitable there's no point having it there.

[kaige]

ill let you's know if i have any luck finding a belt in next weeks as buisnesess open up after the break.

[Craved]

i'll see if my mechanic is in, he used the std pulley locations on Majanal's engine, will try to see which one he used

[kaige]

yeah thanks for that, would make it easier!