Rb20det dissappointing dyno results

[legend01]

1400r , yes you are right on ,that tested the car again today and we were getting that weird wooshing sound as the impeller starts to go the wrong way cant put the old turbo back on without going to a lot of expence remember most stuff on the turbo side of things has been custom fitted but where looking at another turbo at the moment a gt30 the tuner and turbo guy are talking about it now on what to run.

Cerealkiller sorry i dont no the AFR its running but the cam timing is set for standard for the time being till the problem is sorted

Chris32 havnt chattered to you for a bit but yes thought of that because it had eratic idling to but proved not to be the case turner did the figgers on the flows and its running 90% air flow effeciency on 18psi a boost but they recon the turbo's running outa puff as the cams are starting to work

GTST > i dont no the enough about the r33 turbo to commont on that and yes it drops straight down to near stock boost levels but in that 3000rpm range it woops arse

Thanks Peter

[jetr30]

I have a hr31 gt passage with r32 rb20det with stock heads and bottem end with these mods:

- microtec ltx-8

- 550cc injectors

- hiflow turbo (no idea on specs except its a t3 housing)

- full 3" mandual bend exhaust with hiflow cat

- front mount cooler

Now it produced 198.8rwkw on 18 psi ill send anyone the dyno results just email me at [email protected]

So you have something wrong with that motor only producing 160kw

[jaik]

Cam timing is essential I think... Im fairly certain RB20DET Auto should be 20 degrees, not 10 or 15... I found my throttle response to be quite shit at 15 degrees, bumped it upto 20 and it ran smooth as ) My Cefiro is Manual now but use to be Auto, therefore perhaps the base timing in the ECU is different to the std Manual based ECU?

JK

[Cool Hand Luke]

In all fairness, intercooler ineffiecency, incorrect cam timing, and retarded ignition are not going to loose 90rwkw which this should be making.. Unless they are all completley wrong, i would say that your tuner has it right that its a mis-matched turbo and is surging under boost. Would be great to hear the results after the gt30 has been fitted.

[Cubes]

Cam timing will loose 90rwkw easily.

My RB30DET with the stock RB20DET turbo with 9psi made 176rwkw.

On the same dyno and a RB30DET that was built at the same time as mine only made 125rwkw with 14psi and a t3/4 spec RB20DET turbo highflow.

Looking at his cas sensor, 15degree's has the cas sensor almost in its fully retarded postion. So the cam timing IS way out.

It has yet to be fixed but will be soon, I'm keen to see the results.

I would expect 220rwkw maybe 240rwkw if we are lucky.

[Cefiro_PWA]

.48 is damn small... maybe thats the problem?

[grim32]

my rb20t was also disapointing. mods are walbro 500hp fuel pump, malpassi black 2:1 regulator, hybrid intercooler kit, custom t3-t4 turbo from dyna torque, turbo back 3 inch exhaust, wolf 3d v4 tuned at rotamotive, k@n 4 inch diameter air filter. it made 189rwkw

(221hp) at 18.5 psi. ignition was said to be breaking down. since then ive closed spark plug gap and up graded to splitfire coils, now waiting to put it back on dyno. will be going to just engine managemant at moorebank, seen em do great stuff

[blackrb20silvia]

i ahve a feeling its the timing aswell as my car is not performing as it should have been told that if the timing is set to base timing then it needs to be advanced to take advantage of the mods

it feels real gutsy till on boost at bout 5000rpm

wastold that an advance in timing would bring the boost lag down a bit

food for thought

cheers

matt

[jazza08]

You've been mislead... thats 253rwhp not 221

Make ya feel abit better?? hehe

[legend01]

Hi Guys

Well as it stands at the moment the to4 is having a new inducer housing put on it as was deemed way to small decided not to go with the gt3040r as plotted to be way to laggy for an rb20 just waiting on the updated turbo at the moment so can be refitted then we will try tuning again. By the way anyone know of anyone else that might be good at tuning the wolf 3d for a skyline in sydney

Cheers Peter

[grim32]

thanks jazza08, dont make much difference but, u get a bit and u want more, had if off the road lately in the hunt for grunt without too much cash. hopefully the labour will pay off with power

[Wazz]

3040 laggier than the T04? the 3040 is ball bearing.. it would spool up before the t04 specialy if the t04 is off getting a bigger exhaust housing