Jump to content
SAU Community

Recommended Posts

Just to add to the discussion on standard cranks, rpm limits, power they will hold etc.

Our original 240z RB30 with a totally stock block (no filler or braces) stock crank, stock mains cradle and used mains bolts, did a full season last year running reliable 8s in street trim, it was pulled down end of last season, not a mark on anything, even re-used the same rings and bearings, changed the turbo, wound it up some more, rev it to 10,000rpm at times, run to 9200-9300/1000whp at the strip and we've just run an 8.36 still untouched.

This motor has had 2 oil changes only, still on its 1st set of plugs etc.

Don't underestimate the strength of stock parts!!!

Rob

Edited by R.I.P.S NZ

Thank you.

the stock 30 crank is a good piece. great quality steel, use one of our crank collars on it, drill and tap the oil plugs, all clearances to spec the things inmy books would do 700/800 engine horsepower. not an issue. www.lewisengines.com.au

yep top cranks, i run nearly 800bhp @ the fly done 6000 miles on it now amd been to 8350 rpm on track no issues yet, arp studs, std crank/cradle all balanced, spool rods, cp slugs,acl bearings..well happy..bernie uk.

Curious as to what rpm/hp are suggested for the spool rb30 conrods.. with stock motors cheap and rod/pistons/studs/bearings good value these days i dont know how you can beat the rb30/26 combo..

Curious as to what rpm/hp are suggested for the spool rb30 conrods.. with stock motors cheap and rod/pistons/studs/bearings good value these days i dont know how you can beat the rb30/26 combo..

After mucho research and asking of opinions, I have come to the conclusion that ~300rwkw & <7000rpm for stock rods (so I'm only shooting for 300rwkw and limiter is set to 6800rpm).

I figure that's pretty safe for now.

When you say "hits", do you mean bouncing off the limited (hard cut) or the limiter is set to 8200rpm (or thereabouts) and you rev it to 800 then shift before the ecu cuts it out?

Also for those of us that arent subaru heads, whats an 83mm stroke crank make the EJ turn into? I assume its for an ej25 block, so at a guess, 3L?

3L ej would be pretty interesting..!

I have the limiter set at 8100 now.

The customer who ordered the Subaru cranks uses them in the EJ25 blocks from memory - std stroke on the ej25 is 79mm, but I believe they can be used in the EJ20 engine also which is 75mm stroke std and they resleeve them out to 100mm bores.

So you end up with around 2.6 litres

Im no Subaru head either :-) so I may be wrong

Good news for Subaru fans out there!

Can i ask the price please? Also does it come with pistons and rods to suit? Or was it just a one off order? Id hate to pull up next to a 2.6+ litre STi, but if they're not a mass production thing the chances are minimal of that happening

Reason i ask about the jun pump is that my rb30 has one and ive always been cautious about the limiter, so its good to know what they can take (within reason) :angry:

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

    • This is a story of my life things, I learned eventually (thanks to someone calling me out) that my enthusiasm for discussing and sharing ideas that it came across as arrogance and I'm like... WTF?!    One thing I'm pretty sure I justifiably pride myself on is knowing that everyone will have things they can teach you, and you're always going to find out that something you think you know turns out wrong - you just don't know what it is until you get there.   Just the bursting enthusiasm that comes with ADHD when you hit something that gives you dopamine dumps can come across like you think everyone else is wrong or don't matter. But yeah, I'm a software engineer by trade and also do tuning in weekends and 100% have long had a reputation for  quickly making connections when resolving problems or forming solutions that I've sometimes had to take people form a long walk from start to end to explain how I ended up where I did when it's seemed "too simple" when I've stated my initial case, and had the "WTF" type reaction when they've realised how much was actually considered haha.   My reward is that I get all the curly problems thrown at me.
    • Wives never seem to find things funny. Especially when they're trying to sleep, and you've found the new funniest thing ever. I've never seen someone be able to get try and be cranky with me, while they're holding back fits of laughter... 😛   Also, I tell mine it's payback anyway. She has BiPolar. So the household can get quite emotionally wild at times 😛
    • I'm not up to date on the latest, but for basic modifications like pod filter, lower springs etc you can get a modification permit at the time of inspection.  For more serious modifications you will need engineering.  Intercoolers used to fall into the mod permit rule but its been a long while since i looked it up.   Either way you will be able to get it registered, just a case of $300 vs $3k . 
    • Hi everyone! I’m the new owner of a 1996 R33 GTS-T, I’ve purchased this car over from Queensland and brought it to Western Australia and I’ve found that there is a hole cut out in the engine bay for the FMIC that enters into the wheel well (fender liners are in the boot). For anyone that has had to get their car over the PITS here, will this be a major issue?   
    • Yeah I've spotted this one too, whenever it's lotto superdraw week and I'm browsing car sales dot com for my new ride They must be dreaming, maybe it's worth 150k for the link to Brock?
×
×
  • Create New...