Rb26 Into C34

[wolverine]

Im just trying to work out whats the best way to go. 260rs or RS4S then wreck a GTR for the driveline.

I think a 500awkw RB30 stag would be a awesome sleeper

Both RS4S and 260RS have the beefed up (R33GTR driveshafts) vs the auto versions. Both have R33 GTR gearboxes.

Do you know what head you want to use?

[WHITER33GTS-T]

Im thinking something along the lines of a mild 26/30 as I need a tow car to take the 33 to the track. Or pull the engine from the 33 and build a 26/34 lol

[wolverine]

If you want to use the 26 head then I think a 260RS would have all the ancillaries already there including the loom and all the gear to stay with twins.

I don't think you can go too far wrong either way.

RIPS engines are cheap enough and ready to roll with the cradle and oil pickups sorted. If you went a neo 25 head the cheapest RIPS bottom end would come up a treat around 9:1 comp (very roughly) with the smaller chamber volume of this head. Plus the neo head has VCT which is handy.

As long as it is tuned well, RIPS have shown they will hold plenty of power even using stock pistons.

Plus there are plenty of local builders that can build something to suit your needs and budget.

[WHITER33GTS-T]

Will be single turbo something around the T04z size.

Im just looking at options at the moment

[Zorro]

Yeah sure you could slap together a barnyard banger for around 2, but if you want a bullet proof high powered 30, with all bolt-ons and associated parts, you looking at huge dollars!

Not just the engine block & head, & internal parts but, dont forget gaskets & bolts & bearings & seals & machining, then all the other stuff like, manifolds, turbos, wastegate, bov?, intercooler, piping, lines & hoses, radiator, injectors, fuel pumps & tanks, computer & tuning, exhaust, coil packs & plugs, oil pumps, oil coolers, fluids, sump mods, awd mods, complete driveline, brakes, suspension, wheels & tyres....etc It all adds up fast, you cant just slap a 30 block under a stock 25 or 26 & expect to have a monster!

Anything over 200kw on stock 30na pistons is a hand grenade, for the sake of 2-3k you might as well go forged! As for results & reliability you really do get what you pay for!

If I had an unlimited budget, yeah a 26 head with a HKS valcon II Vmax (VCT) setup on an RB34 stroker, with twin 3037s on EtOH, would be wild, but then I would need a car worthy of it (ie: R34vspec with a cage), in a stag would be suicide lol! So unless I win lotto, I will have to be content with what Im building (which is still awesome none the less)!

Its easy to get caught up in the excitement of it, which is ok, but just prepare to get wallet raped! Honestly ask yourself if its what you really want & is it worth what it takes to get there? If that answer is yes, then be happy with your decision and never NEVER look back!

~my 2cents!

[MattR]

if i did get one id like to have auto. i miss my old T51R KAI and one on a stag would turn heads.

[Zorro]

That it would! 8)

[WHITER33GTS-T]

Yeah sure you could slap together a barnyard banger for around 2, but if you want a bullet proof high powered 30, with all bolt-ons and associated parts, you looking at huge dollars!

Not just the engine block & head, & internal parts but, dont forget gaskets & bolts & bearings & seals & machining, then all the other stuff like, manifolds, turbos, wastegate, bov?, intercooler, piping, lines & hoses, radiator, injectors, fuel pumps & tanks, computer & tuning, exhaust, coil packs & plugs, oil pumps, oil coolers, fluids, sump mods, awd mods, complete driveline, brakes, suspension, wheels & tyres....etc It all adds up fast, you cant just slap a 30 block under a stock 25 or 26 & expect to have a monster!

Anything over 200kw on stock 30na pistons is a hand grenade, for the sake of 2-3k you might as well go forged! As for results & reliability you really do get what you pay for!

If I had an unlimited budget, yeah a 26 head with a HKS valcon II Vmax (VCT) setup on an RB34 stroker, with twin 3037s on EtOH, would be wild, but then I would need a car worthy of it (ie: R34vspec with a cage), in a stag would be suicide lol! So unless I win lotto, I will have to be content with what Im building (which is still awesome none the less)!

Its easy to get caught up in the excitement of it, which is ok, but just prepare to get wallet raped! Honestly ask yourself if its what you really want & is it worth what it takes to get there? If that answer is yes, then be happy with your decision and never NEVER look back!

~my 2cents!

I have made 475rwkw from my 26/30 thru a auto already so I know the costs involved. If my car was manual it would be making 530+

As for saying anything over 200kw from stock 30na pistons is a hand grenade that all comes down to the tune. My mate has a single cam 30 thats making over 300rwkw and had done for a while. The vl boys have been pushing stock parts pretty hard

[wolverine]

Anything over 200kw on stock 30na pistons is a hand grenade, for the sake of 2-3k you might as well go forged! As for results & reliability you really do get what you pay for!

This just isn't true. There are so many results out there using stock parts that make a lot more power than you are saying. It comes down to tuning. Keep them away from det they will live a long happy productive life.

I agree that costs add up quickly which is the very reason I haven't gone down the RB30 route....yet. There are always hidden costs but we aren't telling Rob anything he doesn't already know.

[Zorro]

I hinted in an earlier post that you'd be well aware of the costs involved, but for some reading this thread, may not be so informed or experienced!

If I strapped a T51r to my 25/30 it would make over 500awkw reliably also, but Im using a GT3040 for a neck snapping 350 (it is a street car after all; albeit over engineered)!

As for the NA pistons, yeah 200 is abit on the conservative side, but from an engineering perspective 20yr old cast pistons designed for 80'ish rwkw is not what Id call strong & up to the task at hand! By handgrenade, I mean your taking a gamble, bit like the stock oil pump, sure it might work for a while, but some day be it 5min or 5yrs, will disintegrate with catastrophic consequences! Is it worth the risk?

[WHITER33GTS-T]

Even with brand new big dollar parts things still fail. I think on calaisturbo one of the big name vl cars lost a 3.2 stroker on the dyno.

I lost a brand new engine from my previous mechanic not being able to read "in and out" on my oil cooler relocation kit the result was a bent crank and stuffed bearings.

My 33 would have made more power if I had a better exhaust, 3.5" just isnt enough...

[jet_r31]

This just isn't true. There are so many results out there using stock parts that make a lot more power than you are saying. It comes down to tuning. Keep them away from det they will live a long happy productive life.

I agree that costs add up quickly which is the very reason I haven't gone down the RB30 route....yet. There are always hidden costs but we aren't telling Rob anything he doesn't already know.

No shit this isn't true..Rb30NA pistons have made way over 400rwkw time and time and time again, and thats in RB30's, let alone

the stack of 9 and 10 sec 4 cyl motor these have been fitted to over the last 20yrs..lol, i mean there daily driven E85 vls with na pistons that run high 9's and have done yrs of service and they are still going.

Anyway..if your going auto, better budget $4000 at least for a built Re401B..and even then they have a 350rwkw rating..plus they are in a heavy car so that won't be good for them, so maybe a KEAS RE403a with 4WD conversion..more money...lol

If i was you guys i'd save my money..build a nice 300 ishawkw stocky RB25, and save the heartbreak, because i have a crystal ball and it tells me that you go chasing big power in one of these it will end it tears and be of the road half the time..

cheers

darren

Edited April 28, 2012 by jet_r31

[jet_r31]

if i did get one id like to have auto. i miss my old T51R KAI and one on a stag would turn heads.

You'll need another auto then..i smashed built RE boxs to pieces 6-7 yrs ago in a car that weighs 400kg less than a stag(weight and revs kill autos) and it had a GT4294 aka a T51r with different design rear turbine wheel...the way boost comes on so hard will smash 2nd gear hub to pieces..you'd get a day or so out of it..i got 2..