Tomei Rb28 Limited Genesis

[DoughBoy]

As someone posted earlier in the thread, there's acutally a publication on rebuilding RB26's that shows the build process at Tomei's factory. There's really nothing special that they do, no special parts or custom fabrication that would warrant placing them on a pedestal.

You could argue that their experience with building Nissan RB motors gives them an edge, but any decent machine shop/engine builder is able to do the same job.

But then again, the brand name is similar to your nickname here, and alot of people are impressed that the engine is built by Tomei.

[Tommyk]

Nick,

Im after a street car that will have enough capacity to spool up twin 400hp turbos without any unreasonable lag? I also want something that will rev to 8-8500 rpm, and have good power down low as well as up top. I think a 2.8 with 8.8:1 static comp will do well both down low and up top. Id be running no more than 1.5-1.6 bar ? I want to keep the stock fuel system (that is, nismo pump, with stock lines). I assume this is possible?

Tommy, you may have have told me this already but can you confirm what your actual goals are with the new engine in terms of power and application (drag or street etc) - What do you realistically want out of it

Nick

[Blitz]

Nick,

Im after a street car that will have enough capacity to spool up twin 400hp turbos without any unreasonable lag? I also want something that will rev to 8-8500 rpm, and have good power down low as well as up top. I think a 2.8 with 8.8:1 static comp will do well both down low and up top. Id be running no more than 1.5-1.6 bar ? I want to keep the stock fuel system (that is, nismo pump, with stock lines). I assume this is possible?

If you are looking at something like the GT-RS's or similar then the 2.8 is an excellent choice.

[Guest Mashrock]

Sounds good to me!! once again!!

i wouldnt mind seeing how it stacks up against similar engines when its all said and done!

and if your going to go the container part of things then go for it! you'll be saving yourself a packet.

p.s. i need some bridgestone re55s 255 40 17, throw a few sets in the container for me and perhaps some more 32gtr bits!!

cheers mate..

[m&m]

Tommy,you have obviously done your homework on this,and you can afford it,go for it.

Very curious to see how your car performs.

Any word on what block they use?

Will your gearbox hold up?

Good luck.

[Tommyk]

Cheers guys

Im also curious to see how it will perform.

Pretty sure the block is a standard nissan block

The 34 gearbox may have difficulty, but we'll worry about that later.

Actually, while we are on this topic, does anyone know much about the tomei arms B9046 turbos? (apart from the fact that they are horribly expensive, and are rated at 700ps?)

Also, anything about the power enterprise PE1520TR's also rated at 700ps ?

I have a chart here from tomei in relation to their turbos

Both these turbos are made by IHI. I would think that the nismo Z tune uses the tomei turbos, seeing as half the car is made by tomei

[PHaT MR30]

I think you have come to your own conclusions and seeing as your going to be in japan it may as well be worth it, if you can afford it....

me personally i see it as buying the Tomei name more than anything, there is plenty of mechanics in australia more than capable of building an engine to that specification, i think most of them have sussed out by now the quirks of building a good RB...

I did once get a quote for an N1 block but my mind fails me as to how much it cost, i know it was an 8 week wait from the land of the rising sun.

PS you can buy a bare N1 Engine assembled (no manifolds or accessorys) for $12,500.

[exXU1]

You want me to run an rb30 out of a commodore as my bottom end ?

I do want an engine that can rev. Rev limit on these engines is, SAFELY 8500rpm. I dont like the response of rb25's, and i assume rb30's will be no different.

So what if i save 4.5k and am unhappy with my r34 gtr with a slow revving old arsed rb30 engine

You simply have no idea what you are talking about do you ?

If you have more money than sence and have no mechanical skills then carry on regardless.

Strange why the Japs are now importing the RB 30 bottom end from OZ as they never had these over there in large quantities.

Top quickest Sklines in OZ -- RB 30 / 26-- not Dyno Cars -- The real deal down the 1/4.

[Tommyk]

More money than sense ?

I'm gonna let someone else gun you down rather than me. it would be too easy.

Quickest gtr in oz is an rb27 jun/hks ??? (whatever mario ran) in his 33 gtr drag car

Look at keith from the UK. He's running an os giken rb30 engine.

Who is running an rb30/26 ? and running such quick times?

Anyway, ive got more money than sense, so i will buy the tomei. I dont even see how you have justified anything

[wrxhoon]

Hey tommy forget about the tomei/june /hks or whatever just get yourself a red 202 put the rb26 head on throw the pushrods out make an adapter for the sump and then try to sell some to the japs , you make some money on the top ....

[Mik]

You simply have no idea what you are talking about do you ?

If you have more money than sence and have no mechanical skills then carry on regardless.

Strange why the Japs are now importing the RB 30 bottom end from OZ as they never had these over there in large quantities.

Top quickest Sklines in OZ -- RB 30 / 26-- not Dyno Cars -- The real deal down the 1/4.

Are you feeling a bit green or something??

The quickest GTR ("The real deal down the 1/4") runs a big dollar (about 90k from memory) Jun 75.7mm stroke engine. Built in Japan by the Jun Machine shop using Jun parts.

Please tell us the quickest car in Australia running an Rb26/30 combo? I don't know of any that run even low tens. If you are talking about Munro or Wilson's cars...they run Jap Giken 3 litre engines.

What is yout basis for saying that the Japs are importing Rb30s from Aus...it's the first I've heard of it.

[m&m]

I dont think Tommy started this thread to be bagged as he has.

I am guessing no one on these forums has any experience with this motor.I for one would never run a VL bottom end in my R34 GTR.

If he has the cash for such an upgrade,he will end up with a very,very good R34.

There is no doubt he could have a motor built in OZ that would exceed the HP rating of the Tomei unit,580ps is easily achieved for a lot less cash,but looking at the performance of the Mines GTR with a mere 600ps,there is a lot more to it than HP.

I wish I could afford one as well.

[Links]

0 cars 4WD > 2.4L running RB30/26..

1 (no. 3) in RWD > 2.4L..

Go with what you thinks best Thommy.. and go the tomei setup.. I reckon it'll be a sweet engine..

what do they do about warranty.. get it packaged nice and safely!!..

[jonn]

You simply have no idea what you are talking about do you ?

If you have more money than sence and have no mechanical skills then carry on regardless.

Strange why the Japs are now importing the RB 30 bottom end from OZ as they never had these over there in large quantities.

Top quickest Sklines in OZ -- RB 30 / 26-- not Dyno Cars -- The real deal down the 1/4.

After reading that well researched statement I think it's you that have 'no idea what you're talking about'. Leave the guy alone. He's asking for advice, not abuse.

[CruiseLiner]

You simply have no idea what you are talking about do you ?

If you have more money than sence and have no mechanical skills then carry on regardless.

Strange why the Japs are now importing the RB 30 bottom end from OZ as they never had these over there in large quantities.

Top quickest Sklines in OZ -- RB 30 / 26-- not Dyno Cars -- The real deal down the 1/4.

i think people just like to have a dig at anyone who can afford better parts than them by bagging and saying "oh but these brands/parts are 100 times better for cheaper" when they wish they had the cash to actually attempt such projects.

let him shoot himself i reckon opening his mouth with comments like that

go and hang in the rb30 fanclub threads exXu1

Edited March 1, 2006 by CruiseLiner

[Roy]

What do you think of your current GTR as a street car? Doesnt it have 300odd rwkws?

Im all for you bolting in whatever engine you like...but chasing the power you are after for a street car, and having to spend all that money on making it driveable responsive???? Its a lot power considerign you will have so much grunt you wont be able to even plant it in 2nd and rev it out

Is it a good idea to grab the R34, wait for HKS to release these GT-ZZ and throw them on to see how the thing goes? God knwos the R34 RB26 seems a lot more durable then earluer RB26s.

What do Tomei do in the way of porting, head work? Id consider stickign with std crank and rods but spending the money on the head!?!?!?

[manage13]

i think people just like to have a dig at anyone who can afford better parts than them by bagging and saying "oh but these brands/parts are 100 times better for cheaper" when they wish they had the cash to actually attempt such projects.

let him shoot himself i reckon opening his mouth with comments like that

go and hang in the rb30 fanclub threads exXu1

HAHAHAHAHAH! Well said!

[lwells]

He's running an os giken rb30 engine.

Speaking of which, would this not also be worth consideration? Billet crank, reuse your engine block, forged this that and everything else. IIRC, OS-G claims the engine can be revved (with appropriate parts, prep, etc) to about 9,000 RPM so its certainly no slouch.

Also, what are you going to back on to the engine? If ylwgtr's experience is anything to go by, a stock R34 GT-R box isn't going to last very long...

[Tommyk]

Speaking of which, would this not also be worth consideration? Billet crank, reuse your engine block, forged this that and everything else. IIRC, OS-G claims the engine can be revved (with appropriate parts, prep, etc) to about 9,000 RPM so its certainly no slouch.

Also, what are you going to back on to the engine? If ylwgtr's experience is anything to go by, a stock R34 GT-R box isn't going to last very long...

Hey mate

I looked at the os option, and at 1.5 million yen for the bottom end, and the cylinder head i dont quite know if its worth it. At the end of the day, i really dont want to do any engine assembly work, and having the os head built here will be fairly costly. There is no oil pump or sump with that kit ? I would be lookinig at a good 25-30k for it, and i dont think i can justify that much in terms of cost JUST for an engine

I dont want to think about the 34 gearbox. if it breaks it breaks. Will do my best not to. Im not planning on having more than 650-700hp, and i think thats achievable on this motor with decent response

[lwells]

Hey mate

I looked at the os option, and at 1.5 million yen for the bottom end, and the cylinder head i dont quite know if its worth it. At the end of the day, i really dont want to do any engine assembly work, and having the os head built here will be fairly costly. There is no oil pump or sump with that kit ? I would be lookinig at a good 25-30k for it, and i dont think i can justify that much in terms of cost JUST for an engine

That makes a lot of sense. I mean you're going to have to drop a lot of coin on assembly with the OSG, plus headwork and ancilliaries. Its certainly not a drop in solution like the Tomei.

I dont want to think about the 34 gearbox. if it breaks it breaks. Will do my best not to. Im not planning on having more than 650-700hp, and i think thats achievable on this motor with decent response

I'd start saving for a dog box Nobody seems to have a particularly high opinion of the getrag box and its one expensive muthertrucker to fix.