Building A Forged Rb25

[Nee-san]

  marksuxass said:

yeah and that was in regards to piston slap, you seem to think tomei pistons are way out of everyones budget, i picked up a set for a few hundred dollars more, so why not go the extra? also read up on other forums other then skyaus (in relation to piston slap) and see what you find, it may shock you.....

Metallurgical expasion rate can be taken into consideration when developing engine clearances, this means that the overriding key area of interest in the reduction of "slap" will be the tolerances of the engine.

People on GTROC seem to have this almost religious belief in the abilities of a handful of people which is fair considering some of the posters on that website are very very talented people.

However on average I have never heard such a large torrent of absolute crap from a large number of people who really don't know what they are talking about.

[marksuxass]

AAAAHAHAHA cool man

[Nee-san]

  marksuxass said:

AAAAHAHAHA cool man

Thanks for that.

Got any facts to post up, maybe some of the data you've correlated from "reading thousands of forum posts" ?

[SimonR32]

  Nee-san said:

Thanks for that.

Got any facts to post up, maybe some of the data you've correlated from "reading thousands of forum posts" ?

It was actually thousands of forum threads... SOOO much more impressive

EDIT: Also found this rather amusing after all his preaching http://www.skylinesaustralia.com/forums/To...ds-t326991.html

Edited November 9, 2010 by SimonR32

[Nee-san]

  SimonR32 said:

It was actually thousands of forum threads... SOOO much more impressive

EDIT: Also found this rather amusing after all his preaching http://www.skylinesaustralia.com/forums/To...ds-t326991.html

Thanks for the Tip Simon and yes, Much much more impressive.

And that is quite an amusing find, lets end this now in the obvious absence of facts there really isn't anything more helpful to say.

PS sweet 32 Mate.

Cheers,

Mitch.

[marksuxass]

AHAHA oh my god, ask for a little help and get ragged on, heads falling off shoulders due to enlargement........

[marksuxass]

  SimonR32 said:

It was actually thousands of forum threads... SOOO much more impressive

EDIT: Also found this rather amusing after all his preaching http://www.skylinesaustralia.com/forums/To...ds-t326991.html

look at the date and see when that was actually posted!

[R31Nismoid]

  SimonR32 said:

It was actually thousands of forum threads... SOOO much more impressive

EDIT: Also found this rather amusing after all his preaching http://www.skylinesaustralia.com/forums/To...ds-t326991.html

must have been a lot of reading done between Jun and Oct wouldn't you say?

4 months, and lets just say 1,000 threads - average what - 20 posts to be fair about all the drama's of these piston slapping motors...

160 posts/day read... LOL...

[XxNinjaxX]

i do understand a 2nd hand motor would be alot easier, cheaper and quicker than a build but although the standard motor is capable of handling over my target power level happily i'd still prefer to do a build and make it just that little bit stronger for my piece of mind and just the general satisfaction i would have from building it. even if it does blow up at least i gave it a crack which im sure is more than some of the more cashed up members on here could say for themselves.. fair enough if you can afford to pay for your engine to be built by a workshop but from my p.o.v i'd much rather give it a go and learn from my possible mistakes, the build is going to be almost standard with a few upgraded bits here and there, call me stupid and say im spending money on unnessisary items but for me i really dont see the point in a build or even a secondhand motor if it was just going to be completely standard again. i say if you going to take the time to build a motor or swap one out why not make the most of it and improve it atleast a little at the very least?

what im thinking now:

adjustible cam gears

gates timing belt

poncams

standard rods (recon'd)

standard pistons (new with new rings)

N1 oil pump (or standard?, probally no need for n1 at 300>350hp)

N1 water pump (same as above, only effective at higher rpm anyway, opinons?)

power fc

s15 470cc injectors

recon'd head

ballanced bottom end

ARP head studs

ARP main studs

ACL Main bearings

ACL Rod bearings

Lightened flywheel

R34 turbo (op-6 rear housing, possible highflow)

Edited November 9, 2010 by XxNinjaxX

[marksuxass]

  R31Nismoid said:

must have been a lot of reading done between Jun and Oct wouldn't you say?

4 months, and lets just say 1,000 threads - average what - 20 posts to be fair about all the drama's of these piston slapping motors...

160 posts/day read... LOL...

oh cmon now, bringing the negativity again. It's about time we all got back on topic now dont you think. If you have anyting more to say to me. please contact my privatly. Going on about how many threads i can read in a 4 month peroid, hahahha thats just f**king ridiculous yet typicall for some!

[STATUS]

  marksuxass said:

Tomei's are made in there own warehouse as with all there items.

simply no. Just like other jap manufacturers i would bet they are made to order (to their spec) by other large companies... like carrillo (for the rods) and cosworth etc for pistons. I have Multiple jap branded items here in my hand now like rods and they are Jap branded yet have carrillo markings and the pistons are also in the same boat, my rb26 that is for sale has Greddy pistons in it and i know for a fact they dont make them in house. These itmes are exclusive to the jap brands and dont show up in the carrillo or cosworth catalogues.

Another example is I have two sets of JUN pistons here for RB26 and there is $500 between the two of them, the premium one is a Cosworth manufactured item (different crown design again to the greddy) the other is a Wossner more budget orientated design.... poor customer got shafted by an online seller who sent the cheaper series instead of the ordered high spec ones

Mines are using Mahle as their supplier for R35 GTR pistons.

[Harey]

Find a successful engine builder in your area, tell them your requirements and let them put together a proven package.

If the engine builder hasnt used your combo before he wont have had the experience on how to set them up to be the most reliable.

Building a reliable engine with moderately low power is not about using the best of every part but getting a proven package that works well together. The best example of this is a factory engine.

[battery]

sounds to me like you just want to be able to tell people you have a forged engine and that you built it yourself.....

as far as im concerned a standard rb25 thats been serviced and tuned well should hit 200000ks no worries, i'd also trust an unopened used engine more than a first time forged item some guy built in his shed.

your basically spending 5k+ for bragging rights?

[zebra]

There needs to be more crate motors avaliable for RB's without having to pay Tomei/Os Giken/Mines prices

Surely someone can come up with a 5-6k rb crate motor

[jangles]

  XxNinjaxX said:

i do understand a 2nd hand motor would be alot easier, cheaper and quicker than a build but although the standard motor is capable of handling over my target power level happily i'd still prefer to do a build and make it just that little bit stronger for my piece of mind and just the general satisfaction i would have from building it. even if it does blow up at least i gave it a crack which im sure is more than some of the more cashed up members on here could say for themselves.. fair enough if you can afford to pay for your engine to be built by a workshop but from my p.o.v i'd much rather give it a go and learn from my possible mistakes, the build is going to be almost standard with a few upgraded bits here and there, call me stupid and say im spending money on unnessisary items but for me i really dont see the point in a build or even a secondhand motor if it was just going to be completely standard again. i say if you going to take the time to build a motor or swap one out why not make the most of it and improve it atleast a little at the very least?

what im thinking now:

adjustible cam gears

gates timing belt

poncams

standard rods (recon'd)

standard pistons (new with new rings)could get forged for similar price??

N1 oil pump (or standard?, probally no need for n1 at 300>350hp)

N1 water pump (same as above, only effective at higher rpm anyway, opinons?)

power fc

s15 470cc injectors

recon'd head

ballanced bottom end

ARP head studs

ARP main studs

ACL Main bearings

ACL Rod bearings

Lightened flywheel

R34 turbo (op-6 rear housing, possible highflow)highflow can be up to 300kw

IF you want to build it yourself for the experience, just get new rings and bearings, gaskets belt etc.

unless youre going to search for some sort of power above what stock can produce for years then dont waste your money!

stock bolts have been proven for FAR greater power levels many times.

Once completed put it in your car, then you can Rebuild the current one with better parts seeing as you'll now you have more experience and know how because youve already built one...

[jangles]

  zebra said:

There needs to be more crate motors avaliable for RB's without having to pay Tomei/Os Giken/Mines prices

Surely someone can come up with a 5-6k rb crate motor

dont lewis engines offer this?

[SimonR32]

  XxNinjaxX said:

i do understand a 2nd hand motor would be alot easier, cheaper and quicker than a build but although the standard motor is capable of handling over my target power level happily i'd still prefer to do a build and make it just that little bit stronger for my piece of mind and just the general satisfaction i would have from building it. even if it does blow up at least i gave it a crack which im sure is more than some of the more cashed up members on here could say for themselves.. fair enough if you can afford to pay for your engine to be built by a workshop but from my p.o.v i'd much rather give it a go and learn from my possible mistakes, the build is going to be almost standard with a few upgraded bits here and there, call me stupid and say im spending money on unnessisary items but for me i really dont see the point in a build or even a secondhand motor if it was just going to be completely standard again. i say if you going to take the time to build a motor or swap one out why not make the most of it and improve it atleast a little at the very least?

I get exactly where you are coming from but you are pretty much guaranteed to fail which would be a pitty considering you would just be throwing your money down the drain.

I would highly recommend just getting a replacement donk, Nissan have built 1000's of these motors and I could pretty much put my hand on my heart and say they are the best at doing it. They may not be as strong as a forged motor but with the turbo and power you are after they will take any punishment you can throw at them! Building a motor yourself no matter what parts you use won't be a improvement it WILL be a step backwards.

I'm in Perth as well and have access to a very cheap NEO motor with low kms and not abused that would be perfect for what you need.

PM me if you are interested.

Cheers

Simon

[zebra]

  jangles said:

dont lewis engines offer this?

I think they are exchange or sent your motor and they will rebuild it.

I mean pure crat motor, ie pay on Monday and a big box of engine turns up later in the week.

[jangles]

  zebra said:

I think they are exchange or sent your motor and they will rebuild it.

I mean pure crat motor, ie pay on Monday and a big box of engine turns up later in the week.

yeah, can do them outright. but i see where youre coming from!!

like going through a catalogue and picking that ONE!!

[zebra]

Yep, like my other pushrod cast iron v8 loving mates.

race ready 500hp small block, yep ill take the one in blue