Jump to content
SAU Community

Recommended Posts

Hey guys,

Spent the last 3 months doing a few things to my rb25det and it just died in the ass today. 6th cylinder is letting oil by the piston rings and i think it sounds like it is developing some nasty piston slap!

My list of works completed:

- Reconditioned head, replaced valve seals and replaced valve springs with Supatech valve springs.

- Installed Cometic MLS Headgasket and ARP head studs.

- Installed 256 Camtech cam shafts and 2 adjustable tomei cam gears.

- Rebuilt my turbo at GCG and got it high flowed (stage 2 - with ball bearings, rated @500hp).

- Installed Five-O 660cc injectors (red plug).

- Replaced all gaskets for the top end of the motor.

- Installed JJR Bellmouth dump pipe.

I put it all back together and was able to tune the car upto 8.2 psi and got a nice 184rwkw before all the fun was over.

Even though it didn't work out the best I still had a lot of fun putting it all together and going through the whole project.

What you guys think I should do? Give in and sell it? Rebuild the bottom end? Or just buy a replacement bottom end of a second hand motor?

Ps: thanks to anybody who helped me and answered my questions on this forum - have to admit I did a lot of reading here and learnt a lot about my car!

Link to comment
https://www.sau.com.au/forums/topic/434278-mini-overhaul-of-my-r33-gone-wrong/
Share on other sites

seems like you have kesh......

go forged and stroked rb 30 bottom end. bolt all your shit up and see what you get. then change parts as they start limiting you!

Hahaha let's just say I had cash!

That would cost me like 15k :(

cheapest and easiest option. just get a second hand motor, plenty of guys running 300rwkw+ on standard motors.

if you have the time id pull the engine out and see whats gone wrong.

I was thinking along the lines of getting a replacement bottom end and throwing it in... Just worried about the quality of wreckers.

Wish I had the time right now to rip it apart and see the damage!

buy another stock bottom end for couple of hundred bucks e85 these days 350kw is safe with it no need to waste money building.

Exactly what I was thinking but here's the issue - who's gunna split their perfectly fine motor to give you a bottom end.

Buy a complete running engine, there will be heaps available. This way you aren't up for a top overhaul gasket set and you can do compression/leak down tests. You can't do that with just a bottom end and some questionable build story.

Might give it a try - found an engine for 950$. Hope I don't spend another 2 months doing this for no good result :)

what was the compression of the motor you bought?

It was the motor in my car - did a compression test last Sept and had decent results (can't remember exact numbers). The reason it buckled is because it misfired as a result of bad coil packs... Even though I got the misfire fixed, the damage to the motor was already done.

+1 second hand/import motor, not 2 months, chuck it in this weekend :P , plus might be hard to get a tune around xmas

I wish I could afford it to be honest - need to work atleast 2-3 weeks before I have another crack at it!

faaark!!...all that work for 184kws...i think i would of set fire to it there and then....I put a 5$ bleed tap from bunnings on my stock car with an exhaust and it made 185kw...

what computer you running?

I think you may have misread my post - the engine shat itself and the best reading I received was 184rwkw at 8.2psi. I was planning on running it at 20psi which would of given me roughly 300rwkw. :)

My car now runs at 0rwkw and pours out an awesome smoke show from the tail pipe ;).

PS: Running a microtech.

I just realised - I originally made that post on Tapatalk with paragraphing (and bullets) and when I looked at it on the PC it looks like one massive blob of a post with no structure... thats odd :(

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

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...