Building An Rb26 For Response....

[Antimatter]

Since the hi-jacking of my N1 block thread (dont get me wrong - if N1 oil pumps are a hot topic, then I am glag I could initiate some dialog..)

I thought I would try a different tact for my next topic...

if one was building a RB26 for response - what woild you do... feel free to explore (but not limit youself to) Turbos, Compression ratio, Cams and Cam Timing. I would like to keep this topic about RB26 if possible - 2.8 etc have there obvious benifits... but lets just say we want to stick with 2.6 for now...

Want to make as much power / torque down low as possible.

So building a good responsive RB26 for a mostley street car...you would.......

(your opinion goes here)

Looking forward to the banter again. Love this forum

Edited May 19, 2008 by Antimatter

[nsta]

Since the hi-jacking of my N1 block thread (dont get me wrong - if N1 oil pumps are a hot topic, then I am glag I could initiate some dialog..)

I thought I would try a different tact for my next topic...

if one was building a RB26 for response - what woild you do... feel free to explore (but not limit youself to) Turbos, Compression ratio, Cams and Cam Timing. I would like to keep this topic about RB26 if possible - 2.8 etc have there obvious benifits... but lets just say we want to stick with 2.6 for now...

Want to make as much power / torque down low as possible.

So building a good responsive RB26 for a mostley street car...you would.......

(your opinion goes here)

Looking forward to the banter again. Love this forum

im running n1 turbos and they are extremely responsive for the street, i couldnt believe how progressive the power delivery is......they dont seem to run out of puff as well, and will hold boost nicely all the way to 7000rpm:)

[R31Nismoid]

I notice your other thread made mention of 400rwkw?

If going for response, it's the GT-SS/ -7's as a the combo of choice. But you wont see anything like 400rwkw. 320rwkw is about it.

The hold till 8000rpm when setup correctly.

With injectors, AFM/PFC & nice rebuild and a tidy up of the head and so on… its basically like having the RB26 with factory turbos, but it'll make you the extra 60-80rwkw with 20+ psi making it feel very meaty. Provided your tuner knows how to play with cam gears and so on.

Just whatever dumps and you could increase the comp slightly being fuel in todays world is a bit better here in AUS compared to 10-15years ago.

[Antimatter]

Hey Ash

I did mention 400kw.... and I would love this + response, but I also understand that without going to 2.8 or 3.0 It is going to be a compromise. Just curious to see peoples experience with response and there own setups....

I have seen some really good compromises with Apexi (AX Series) Turbos seeing around the 370kw mark - however these are sadly discontinued.

on the other hand... how responsive can -5's be "made to be" with the right cam timing and compression?

Steve

I notice your other thread made mention of 400rwkw?

If going for response, it's the GT-SS/ -7's as a the combo of choice. But you wont see anything like 400rwkw. 320rwkw is about it.

The hold till 8000rpm when setup correctly.

With injectors, AFM/PFC & nice rebuild and a tidy up of the head and so on… its basically like having the RB26 with factory turbos, but it'll make you the extra 60-80rwkw with 20+ psi making it feel very meaty. Provided your tuner knows how to play with cam gears and so on.

Just whatever dumps and you could increase the comp slightly being fuel in todays world is a bit better here in AUS compared to 10-15years ago.

Edited May 19, 2008 by Antimatter

[Warpspeed]

Rb26 eh?

Response only, no power goal.

Rip off the turbos, increase the compression ratio to 10.8:1 with some RB25DE pistons, lighten the flywheel, fit the 4.35 diffs out of an R32 GTS4 and fit some tube extractors.

Throttle response with the six throttle body induction should be pretty instantaneous.

Well you did ask...........

[Antimatter]

I spose I did

Now can I have that and 350kw?

Rb26 eh?

Response only, no power goal.

Rip off the turbos, increase the compression ratio to 10.8:1 with some RB25DE pistons, lighten the flywheel, fit the 4.35 diffs out of an R32 GTS4 and fit some tube extractors.

Throttle response with the six throttle body induction should be pretty instantaneous.

Well you did ask...........

[R31Nismoid]

Hey Ash

I did mention 400kw.... and I would love this + response, but I also understand that without going to 2.8 or 3.0 It is going to be a compromise. Just curious to see peoples experience with response and there own setups....

I have seen some really good compromises with Apexi (AX Series) Turbos seeing around the 370kw mark - however these are sadly discontinued.

on the other hand... how responsive can -5's be "made to be" with the right cam timing and compression?

Steve

-5's aren't too bad.

Snowmans car is one of the signature cars for it, its sooo much nicer than it was a few years ago and thats just R&D really (Racepace)

And considering your Melb - its probably the place i'd be going to bounce some ideas around and go for a buzz in a few of the Vic guys cars with the -7 and -5 and see for yourself which set-up suits best.

[GTRNUR]

What about aluminium flywheels? Ive seen them used on porsche's and they greatly improve response. They also make the car painful to maintain speed especially up and down hills but thats another matter.

[pepe lopez]

Having owned GTR's that are stock (211rwkw), mild ( 280rwkw), pretty fast (370rwkw) and the best (460rwkw), I dont think I would ever opt for anything other than 460rwkw again. I am currently driving a GTR with 225rwkw and hating it, its for sale.

Again, this is just an opinion, and all of those cars were 100% street driven, everyday, never been on a track with a GTR. In my opinion, the difference between lag and response is gear selection.

For the sake of your thread, the 370rwkw was an HKS 2530 set up.

[Antimatter]

Have heared 2530's and -5's are pretty similar.... or is that GT-RS and -5's?

Been told that -5's are in pretty short supply at the moment too....

I guess the turbos will be the big factor - but if I were building an engine.. "slightly" higher comp.... clean up the ports... and I am on the right track?

I understand a good tune (both ECU and cam timing) goes a long way

Having owned GTR's that are stock (211rwkw), mild ( 280rwkw), pretty fast (370rwkw) and the best (460rwkw), I dont think I would ever opt for anything other than 460rwkw again. I am currently driving a GTR with 225rwkw and hating it, its for sale.

Again, this is just an opinion, and all of those cars were 100% street driven, everyday, never been on a track with a GTR. In my opinion, the difference between lag and response is gear selection.

For the sake of your thread, the 370rwkw was an HKS 2530 set up.

[Blue_GTR]

Have heared 2530's and -5's are pretty similar.... or is that GT-RS and -5's?

Been told that -5's are in pretty short supply at the moment too....

I guess the turbos will be the big factor - but if I were building an engine.. "slightly" higher comp.... clean up the ports... and I am on the right track?

I understand a good tune (both ECU and cam timing) goes a long way

For me i would..

Head:

Port and polish

260' Cams with good lift

Adjustable cam gears (and dialled in properly)

Bottom End:

9.0:1 Compression Forged Pistons

Forged Rods

Treated crank

Turbos:

HKS 2530 or Garret 2860 -5's

With 1.6-1.9 Bar boost I would expect 400kw atw easily. Im running 2530's with Tomei 260s making 360kw atw on 1.3bar, stock bottom end and no head work. I get full boost around 3,800rpm.

Edited May 19, 2008 by Blue_GTR

[bnr#@]

Light weight recipricating components (flywheel, drive shaft, pulleys, wheels) good ignition setup and as big spark plug gap, and as much timing down low as you can safely do.

fully free flowing intake and exhaust a given...

[Duncan]

and don't forget an n1 oil pump.

[DRIFTER]

contrary to popular belief, a single can give you the results you're looking for.

[NYTSKY]

I would think a HKS3037 would be very responsive on a 26. Would see just over 300awkw too.

[STATUS]

how responsive? our hack makes 365rwkw atm and makes full boost by 4000-4100rpm

[R31Nismoid]

contrary to popular belief, a single can give you the results you're looking for.

Maybe

Fact of the matter is the thread starter is in Vic. Big singles are a no-no down here these days

Low mounts all the way due to the EPA/Police etc

[Snowman]

Here's my latest dyno graph. Racepace -5's set-up.

If this is what you want then go see Ben. If you want / expect even better results on an RB26 then good luck with that.

[STATUS]

THATS kinda sexy ^^^^

[Antimatter]

SAU Vics catchcry:

"go see Ben"

(and fair enough too)

... that is a very sexy graph, whats it like to drive?

Here's my latest dyno graph. Racepace -5's set-up.

If this is what you want then go see Ben. If you want / expect even better results on an RB26 then good luck with that.