Rb34det?!?!

[bendychicken]

I was reading the June 2004 issue of import tuner and in the "800hp shark attack" article an rb26dett was punched out to 3 liters and they made 800hp.So, my thought is: why not do the same thing with an rb30det hybrid to yield 3.4 liters? if the the shorter stroke 2.6 block can be punched out to 3 liters couldn't the longer stroked 3 liter block be punched out to 3.4 liters? just a thought.:thinker

[PROJECTRB240SX]

The 3L RB26DETT kit consists of a combonation of stroking and overboring. Thats alot of material to take off if you were going to obtain 3L just through over bore.

[bendychicken]

So, what would be the displacement if you did the same thing on the 3 liter block?

[PROJECTRB240SX]

YOU COULD GET YOUR 3.4L POSSIBLY BUT WOULD THAT ENGINE FIT UNDER THE HOOD OF A S CHASSIS CAR EVEN W/ MOUNTS?

[bendychicken]

umm, i donn't think your understanding.I'm not saying make a 3.0 from a 2.6 liter.RB26DETT = bore-stroke(86 X 73.7)RB30DET= bore-stroke(86X86)In the article they said nothong about stroking the 2.6, all they did was bore it out to 3.0 . Assuming we keep the the RB26DETT stroke of 73.7 that would mean they would of had to bore it out to about 91.6 to make it a 3 liter. So they must of removed 2.8mm from the cylinder wall to get that. Is that possible? If the 2.6 could handle it, why not the 3.0?

If that same estimated bore is used on the longer stroked 3.0 liter aussie block then that should yield a 3.4 liter RB.But then again this is all based of off the assumtion that ALL they did was bore the 2.6 out. That is all they said they did, but i'm just reading this out of a mag sooooo iduno. I just thought a 3.4det would be sweet!:ylsuper

[bendychicken]

"YOU COULD GET YOUR 3.4L POSSIBLY BUT WOULD THAT ENGINE FIT UNDER THE HOOD OF A S CHASSIS CAR EVEN W/ MOUNTS?"

custom hood w/ a bump?

[PROJECTRB240SX]

AND WHAT I'M SAYING IS THAT NO ONE HAS FITTED A RB30DET INTO A S-CHASSIS YET AS FAR AS I KNOW AND NO ONE CAN SAY HOW IT'LL FIT EVEN WITH MOUNTS.

WIDENING A CYLINDER BY 5.6MM WOULD REALLY THIN OUT THE WALLS OF THE CYLINDER. IT WOULD PROBABLY NOT HOLD UP TO THE AMOUNT OF FORCE THAT MOTOR WOULD PRODUCE SO SLEEVING WOULD BE IN ORDER. THE BIGGEST I HAVE SEEN IS 4MM TAKEN OUT OF THE RBS. CAN YOU LINK ME TO THE ARTICLE OR POST A COPY OF IT?

[PROJECTRB240SX]

A CUSTOM HOOD WOULD WORK.

[bendychicken]

The article was called "800HP shark attack" in the June 2004 issue of import tuner. issue # 063.Auto Select is the shop who did the work.http://www.autoselect.co.jpThe article starts on page 147. The car that the engine was in was an R34 GTR. They called it the "Yellow Shark"Unfortunatly it only seems to be in the paperback mag. I'll see if I can scan it or somthing.

[PROJECTRB240SX]

http://intertran.tranexp.com/T...shtml

THE YELLOW SHARK IS 2.7L

[bendychicken]

This is the car. it's the top one. It says it has a 2.7 kit on this site but in the mag it says it's 3.0. So maybe it is stroked then?scanners not working and my digi cam needs batteries. I'll get some AAs while I'm out today.http://www.autoselect.co.jp/demo/

[PROJECTRB240SX]

RIGHT AND ITS 2.7L..... UNLESS THEY BUILT A DIFFERENT ENGINE FOR IT.

[bendychicken]

it seems to be the same engine based on the the after market stuff listed in the mag. Maybe they just did the 3.0 punch and havent updated there site yet.

[bendychicken]

Quote from the article:"The engine block was the first item to be addressed as a full lineup of OS Giken rods, pistons, rings and crankshaft components were used to strengthen the RB bottm end.Displacement has been punched out from the factory 2.6 liter to a stout 3.0 liter."

[PROJECTRB240SX]

OHH, THE OS GIKEN KIT DOES STROKE AND OVERBORE..... I KNOW THAT FOR A FACT BECAUSE ONE OF THE GUYS I KNOW HERE HAD PICTURES AND SPECS OF THE KIT AND WAS INTERESTED IN DOING IT WHEN I TOLD HIM ABOUT THE RB30E-RB30DET(T) CONVERSION.

I'LL SEE IF I CAN DIG UP ANY INFORMATION ON IT AGAIN.

[PROJECTRB240SX]

http://osgiken.co.jp/pro_spec/rb30kit.html

YOU CAN SEE IT USES A BLOCK ADAPTER TO PROVIDE THE ADDED CLEARENCE FOR THE EXTEMELY LONG STROKE.

[bendychicken]

so what boreXstroke does that kit yield?(sorry, my browser doesn't display japanese, and i couldn't read it even if it did)

and that is for thee 2.6 right? so if the same bore is used on the aussie block then what wold the disp be?

[PROJECTRB240SX]

I THINK THEY JUST EXTENDED THE STROKE TO 85 OR 86MM, I CAN'T REMEMBER THE SPECIFIC SPECS BECAUSE ITS BEEN AWHILE.

THEY COULD OVER BORE TO 88MM AND STROKE IT TO 82MM AND GET THE SAME DISPLACEMENT RESULTS AS THE 86X86MM SETUP.

[PROJECTRB240SX]

YES 2.6L TO 3.0L CONVERSION KIT.

[WDRacing]

The 3.0 should fit fine under the hood, I would think. Or I'm sure can be made to fit, such is the nature of our hobby.

The 3.4 stroker/bore kit would work, you'd have to have a custom crank ground and the cylinders punched out a ton. I'm not sure of the stock RB30 stroke though, I think she's already got quite the long stroke. So more would yield more torque but kil your revibility. If it was an option I was doing, I'd look into sleeving the block for strength though.

Expensive to say the least, a better option in my mind would be to have a stock crank reground and lightened and balance with the entire rotating assembly. Using the lightest internals one can find or have made. Titanium rods if you can afford them. Then beef up the valvatrain and get a set of bigf cams, like 280 or better with increased lift. Then extend your rpm range for more power. Your on boost window will be longer and your numbers will be greater.

But thats juts my .02

[PROJECTRB240SX]

THE RB30E(T) HAS A STROKE OF 86MM MATCHED WITH A BORE OF 86MM. IT WILL FIT DON'T GET ME WRONG BUT IT WILL TAKE ALOT OF LOVIN' TO DO SO! WITH THE INCREASED DECK HEIGHT IT WILL NEGATE THE EFFECTS OF THE MOUNT KITS AND PUT YOU BACK IN THE SAME POSITION AS THE RB20 AND 25 SIT WITH THE SKYLINE X-MEMBER.

[bendychicken]

what's the largest an rb has been reliably been bored out too? I was just thinking if you can make an extremely streetable RB30DET with 500hp, what could you do if it was bored out to the maximum allowable amount without getting into sleeving and what not. Not really interested in stroking it. The aussie block already has PLENTY of stroke. I'm thinking about a street engine not a drag engine. The things gotta last. That's my reason for trying to get all the displacement I can out of it. If I can make the same power with out reving the crap out of it, it might last right?

[WDRacing]

I'm not following your thought train here man, your talking about a new engine swap that has yet to be done to my knowledge and want to do extreme over boring, yet you want the engine to last and are concerned with it being very streetable.

Just swap in a 350 if you want a torque curve and reliablity.

WD

[PROJECTRB240SX]

I'M CONFUSED ON YOUR LOGIC ALSO..... MODIFICATIONS TO ANY MOTOR WHEN MATERIAL IS TAKEN AWAY WILL REDUCE RELIABILITY, EXCEPT FOR THE CASE OF SHOT PEENING AND BALANCING.

REVVING A MOTOR OUT TO HIGH RPMS IS AN EXTREMELY STRESSFUL TASK FOR THE ENGINE AND WILL REDUCE RELABILITY ALSO UNLESS ALL THE BASES ARE COVERED (TITANIUM VALVE TRAIN, LIGHT WEIGHT/HIGH STREGNTH ROTATING ASSEMBLY, ETC.). WITH THIS BEING SAID YOU WOULD WANT TO STROKE THAT ENGINE TO MAKE YOUR POWER AND DISPLACEMENT.

JUST STICK WITH A STOCK RB30DET(T) AND TURN UP THE BOOST AND YOU WILL BE PRODUCING MORE POWER THAN THE S-CHASSIS COULD REALLY USE.

[bendychicken]

point taken:)

[GrimDrifter]

pics of rb30 in s13http://skeleton.net.nz/~ben/RB30S13/

[93RPS13]

thats crazy.......