Jump to content
SAU Community

Recommended Posts

  • Replies 240
  • Created
  • Last Reply

Top Posters In This Topic

Sif.

Bring it, Bish.

I stand by what I said.

Heh will submit my essay later after work. Base physics seem to be overlooked, so will have to include a chapter on that and basic mechanics as well.

Oh and if it was only oil surge/spun bearing, why does piston 5 have alot of detonation peppering?

Sif.

Bring it, Bish.

I stand by what I said.

3L bottom ends help ONLY with low end torque/tractability (good for general street use, yes)

BUT

The shorter stroke RB26 based engines are ALWAYS a better idea as out-and-out race engines, for all the reasons I mentioned and more.

Need I remind you that the 3 fastest drag GT-Rs on the planet use 2.8L or smaller engines, with the HKS 33 using their own 2.8L kit (crank has 4mm more stroke than normal [77.7mm])

But I'm sure in your mind the 3/3.1L jobbies are better, right?

Your a gimp, for those of us that don't own a multi million dollar company ie HKS and build a car from our own catalogue and aren't trying to be one of the 3 fastest GTR's on the planet tell my why a 3L isn't a good way to go for a RWD car for someone unlike yourself that has some description of a budget?

oh and with all this knowledge you posses what have you built or done with your car?

Your a gimp, for those of us that don't own a multi million dollar company ie HKS and build a car from our own catalogue and aren't trying to be one of the 3 fastest GTR's on the planet tell my why a 3L isn't a good way to go for a RWD car for someone unlike yourself that has some description of a budget?

oh and with all this knowledge you posess what have you built or done with your car?

tehehehe he said gimp :sick:

*sigh*

Heh will submit my essay later after work. Base physics seem to be overlooked, so will have to include a chapter on that and basic mechanics as well.
Your a gimp, for those of us that don't own a multi million dollar company ie HKS and build a car from our own catalogue and aren't trying to be one of the 3 fastest GTR's on the planet tell my why a 3L isn't a good way to go for a RWD car for someone unlike yourself that has some description of a budget?

oh and with all this knowledge you posses what have you built or done with your car?

Oh dear...Seems I've offended the 'RB30 bottom end' crew.

Gimp suit in the wash at the mo'. It's just regular old Shaun for today *LOL*

Look,I'm sure an 3-3.1L RB with a twin-cam head can make lots of power and is great fun, and I know it CAN work very well (Wilall racing as an example, especially [yes, yes- that's an OS Giken kit]), and I didn't mean to step on the toes of anyone that's gone to the trouble of doing the conversion themselves.

But I just don't think that using the 85mm stroke crank from an RB30 is the best idea for engine longevity/reliability at high engine speeds.

But it's all relative.

To be at the pointy end of 1/4 mile competition, you would be rebuilding/pulling down the engine on a fairly regular basis (in comparison to a mildly hotted up performance engine, anyway) to make sure everything was still o.k

Like I mentioned in my original post

'ALL THINGS BEING EQUAL'- i.e rod/piston strength & weight, the shorter stroke engine will be able to rev higher, before mechanical limits come into play, due to the lower piston speed.

More revs = more combustion cycles per unit time = more torque = more power (if the motor is designed/blueprinted for it)

Yes, the 3L has more capacity (approx 66cc per chamber, wow), but, within this engine design, IMHO it's not as important as the rev limit of the motor with regards to how easily it makes big (v.big) power.

Hope this clears things up

p.s Wil- no more taking my posts out of Whoretown :sick:

So am I'm missing something? Mona shouldn't go RB30 bottom end because she'll need to rev it to 15krpm?

Some of the VL guys down south ROUTINELY rev their VL RB30 combos past 9krpm - one sees 11krpm from time to time.

In other words - I don't see your point.

Dude with every post there are more misconceptions brought into the equation. You start off talking about a street motor on pump fuel, then jump to quickest GTRs in the world, then back again to street motors and longevity, and then talk about theory and limits.

Throughout all of this you've thrown in misleading statements, outrageous and unverified claims, and total bullshit.

I only get my back up over misleading information, if you want to go ahead and talk up RB26 combinations go for it - I really don't care. But other people can and will get the wrong idea over misinformation, which isn't a good thing.

For anyone who still cares:

Nissan had the RB30 design from the mid 80's

The RB26 came out in the late 80's

They could have used the 3L engine in their soon to be all-conquering 'group A homologation' race special (ie R32 GT-R)

Can anyone give me a coherent, logical reason why they chose to design an engine with 2568cc capacity rather than just use a twincam head on a balanced and strengthened version of an engine they already had- that was 2962cc?

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



  • Latest Posts

    • Time to decide what’s more import, your power level or your budget because you’re going to struggle to keep both 
    • Our Southern Highlands Cruise is proudly registered with “R U OK?” Day.  Sometimes the best way to check in on your mates is by getting out for a drive together. Sharing a common passion like cars creates the perfect space to chat, connect, and support each other.  A simple “R U OK?” can make all the difference. Let's enjoy the drive, the company, and look out for one another. PLEASE WEAR YELLOW FOR “R U OK?” DAY Sunday 14th September 2025 9:30AM Meeting Crossroads Homemaker Centre 10:00AM Cruise Departure Via Old Hume Hwy 11:45AM Arrival at Mittagong RSL Club Meet Location: Crossroads Homemaker Centre Final Destination: Mittagong RSL Club *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
    • Yep, its been down for a while, as I understand it it will be back soon.
    • Yeah I also looked at Plazmaman, but, it ended up alot  cheaper getting black ones through EFI when you also added in the delivery cost
    • Nice shot! They look super clean. The roof rack delete on the black one is interesting. Would like to see more pictures from different angles. It's subtle but could make quite a difference to how the car looks in profile.
×
×
  • Create New...