Desean Strickland

I have a brand new g3 21u high flow that I can’t use any more due to going 25/30 selling it for $750 cost me $1000 brand new never installed or used comes with stock wastegate actuator in WA but can post it delete if not allowed

Hey Tao I bought a 21U g3 highflow a few months back, was planning to put it on my rb25det. long story short i discovered i had to rebuild my engine. i have gone down the 25/30 route, what would happen if i just used my internally gated 21u g3 highflow on it? my power goal is 300kw. what other turbo could you recommend? also if i did go with a bigger turbo could i still stay internally gated? cheers

Hey guys For people with a built rb25, how much did u pay for the machine shop side of things like balancing and prepping crank, testing and resurfacing the block, cylinders bored out piston and bearing clearence measured etc. I’m assembling the engine myself and using my local machine shop but just wana make sure I’m not getting ripped off, Not parts cost just the actual service. Cheers

yeah im guessing the piston rings are fine coz it has 150-155 compression it was stock fuel pump which iv just replaced with a walbro 460, have done the wiring relay mod as well, it had a haltech platnum pro already installed and tuned by C-red and basically just made stock power, iv also got a hypergear g3 highflow and the 980cc injector kit from Efi to put in.

Yeah iv thought of doing it myself but if I did I would probably rather go with some 86.0mm forged pistons and just spend the extra 1.3k while I’m in there and just re use my stock rods how did u hone the cylinders? Did u send it to a machine shop or did u just do it yourself? im in WA, about 2.5 hours away from Perth so my options are kinda limited. and yeah after I finished cleaning all the pistons today it’s more like 5 of the pistons have detonation damage. either way it’s gonna get re-tuned when I’m done. The stock turbo seals blew causing it to slowly burn oil for a while so that could have been the cause.

True, I never thought of that. Iv seen u in other threads and u seem to know a lot, so roughly how much do u reccon it would cost me to get the engine rebuilt if I’m pulling the engine and just dropping the short motor off to the engine builder? Obviously I would have to get forged pistons Cus those ones are ruined, probably an mls head gasket and arp studs and just the rest close to stock? Assuming my block and crank are reusable. I know that’s a question for an engine builder and I’ll try and get some quotes on Monday but just from either your own experience or from what you’ve heard from others, how much u reccon it will cost me if I’m pulling the motor and all they have to do it just rebuild it?

Yeah cams are still in, the silver look on the pistons in the first 2 photos is because I cleaned them to see if it was just carbon buildup, which it isn’t. Engine has 200,000kms and it is 3 pistons which has notable wear around the edges

Iv already cleaned the piston in the first pic and it looks exactly the same, it definitely isn’t just carbon buildup. And the engine has 200,000kms and was burning heaps of oil from the turbo seal failing prior to pulling it apart, it didn’t run for long while burning oil.

Hey guys So I took the head off my rb25 to install arp head studs and replace the head gasket and have found that 3 of my pistons look like this… Looks all worn and uneven only on the intake side of the piston. Also the exhaust valves have a bunch of build up on the bottoms. The bores still look fine with decent crosshatching and compression is fine with about 150 per cylinder. My Question is what causes the pistons to wear around the edges like that and is the crap built up on the bottom of the valves related or something different? and most importantly can I send it (obv after I clean it up) or should I be considering a rebuild Cheers for any help

hey guys i have a 21u G3 that im about to install and am getting the car tuned after, only problem is i live 150kms away from my tuner. do u reccon it would be ok to drive it that distance after installing the g3 if i leave the stock waste gate actuator on it for the trip? my r33 has been previously tuned still with the stock turbo and a boost T currently making about 10psi. so would it be fine to drive it with the g3 installed just for that 150km distance or dont risk it? cheers

hey guys so i wana make 250-260kw atw on my rb25det, would the g2 be capable of making that power goal or do i need the g3? just kinda confused because on the site it says its capable of 350hp but doesn't say if its meant for an rb20 or if its suitable to make 350 on an rb25. ill be running 550cc side feeds, a walbro 460, frontmount IC and all the other stuff necessary cheers