The Big Dyno Day

[66 skyline gt]

just though i would let you guys know wot i got from the prince after the big dyno day..... it was 126kw at 152kph in 4 gear....

now wot cheap mods can i do to the rb20 to increase that figure that wont break the budget?

wot i have know is a rb20det, 450 x 300 76 front mount, pod filter with cia, standard turbs standard dump, retrofiited r 33 exhaust, custom 2.5 inch intercooler piping.....

any help, greatly appreciated

Pete

Edited December 3, 2005 by 66 skyline gt

[Maxx]

exhaust, boost, cheap ECU (SAFC/jaycar AF adjuster)?

[Deluxe]

Yeh Phat Definatlly go for the ECU option, Possibly a custom Exhaust from Mark at ET(Prob have to mod a bolt on anyways) and definatly Turbs (with some more boost) and she'll be sweet as!!

[Cubes]

Is it a late model RB20DET?

If it is.... Keep the stock rb20det turbo for response, dial in 1bar with an EBC or bodgy actuator mod (get it holding boost) then do the ecu. It should make around 170-175rwkw and pull hard from 3000-3500rpm to 7000rpm.

In order of priority..

Dump Pipe, nice cust 3" exhaust with a straight through muffler, 1bar boost, ecu/safc or what ever.

What diff ratio are you running?

That thing would hammer.

Edited December 3, 2005 by Cubes

[66 skyline gt]

the ratio at the rear is the stock one whick is 4.444:1............funny hey, shes quick when she comes on boost........lol

[Cubes]

So its a R32 rb20det? or?

4.444 sound just right.

Cant wait to check it out some time.

[66 skyline gt]

silvertop rb20det ( r32), stock boost (11 psi), stock box and turbs, stock r33 exhaust and a 4.444 rear end

[Cubes]

Stock IC?

Push boost up to 12-13psi.

Mine would tail boost off at high rpm to 12.5psi.

Edited December 4, 2005 by Cubes

[66 skyline gt]

na, have a 450 x 300 x 76 ic behind the grill stashed away with 2.5 inch custom ic piping.......

i heard ya should push much more than 12 thru the stock turbs of the ceramic wweel goes BANG!.....

[Cubes]

On the rb25det yes.. If you push more than 12-13psi they tend to let go.

The ceramic turbo's on the rb20det you are able to run around 14psi or so.

I ran 1bar for ~3years and 100,000km's until I dropped the rb30det in that due to the rb25 head flowing so much better required 9psi on the same stock turbo to make ~10rwkw more power.

It also has a lot to do with driving conditions as what kills the ceramic turbo's isn't boost its EGT's. High EGT's due to poor tuning, detonation OR track work kills ceramic turbo's in a flash.

Using a ceramic turbo for track use I would be nervous to push more than stock boost through it, simply due to the heat, even then ppls have had turbo's let go at the track on stock boost.

Roy (Troy) in his R32 pushed 1bar or 14psi I don't remember through his and attended multiple track days without a failure so at the end of the day when it comes to track use its luck of the draw.

Push 14psi through it, providing afr's and ignition are good with no detonation it will be perfectly fine.

I have a spare RB20DET turbo laying around here should you prove me wrong.

The RB25 exhaust.. I think they are 2.5"? If so replace the muffler with a straight through. That will bring power up.

Edited December 4, 2005 by Cubes

[66 skyline gt]

sounds like a plan, i will whack in my dual stage boost controller and wind up the boost!

[MattR]

ive got custom ecu tuned by donnon that u can get of me for cheap price, sam has itm and i want it back

[mr_rbman]

hey pete, where'd you get it dynoed, yours has the same mods as mine but you have the cooler and i made 149rwkw's on the graham west dyno, your diff gears may be a little different though!

[dangerman4]

hey pete. its Darren here im friends with mark n mel.. i have met you a couple of times a while back.. i have a brand new stainless dump sitting here next to me that i dont need if ya interested.. $150 and I reckon i even have the gaskets etc..