Sau Dyno Day 22nd October

[Cubes]

I believe u made 218rwkw.

I need a dyno run printout to be able to dial in all the numbers so the graph looks right as no doubt you have picked up mid range as well.

Sky30,

Bl4ck32 was running 1bar, I was running stock rb20det actuator, i.e no boost control, boost would spike up to 12psi at ~2000rpm then tail off to 9psi by 4000rpm where it would go on to make peak power.

60km/h is approx 2200rpm. Its strange as if that is the case then 160km/h is only ~5900rpm. <scratches head>

I am going to need every ones tyre sizes to apply a correction.

Not to forget the diff ratio correction for both Natho's and the R33's slightly higher 4.11:1.

As I said prior, if your keen to compare off boost ignition maps i'm keen to do so. Depending how much works gone in to your maps you may pick a little off boost torque up.

Edited October 27, 2005 by Cubes

[MS-75]

What sort of on-boost timing numbers are you guys using?

Sean

[Cubes]

With the stock RB20DET turbo it was very restrictive, peak torque saw 17degree's at 2000-2400rpm, it made peak power with 15degrees.

The slightly larger turbo is fine with 18-19 degrees maybe more, its yet to be tuned.

[Deluxe]

So cubes what happens when im running 235/40/18 streatched on 9.5's? I guess i would loose traction alot more, but hey gotta be loving the corners......lol

[Cubes]

Running 235/40/18's would act as if you had an ever so slightly higher diff ratio, so your top speed vs rpm will be higher than the others, as a result also your down low power will be down.

A good example of this is Natho's VLT, that runs a 3.45:1 diff ratio and the dyno stopped at 5100rpm yet his wheel speed is up there.

I think its wrong to compare bl4ck32 and my dyno's on the chart I posted prior. Something is just wrong with the speed vs rpm, possibly shaun fiddled with the wheel speed calibration. Don't know.

Edited October 27, 2005 by Cubes

[chops]

Joel, can you add mine to that graph too, just for comparison sake, or post the xls file and I'll do it myself!

Also, I presume you're doing the calcs for the diff ratios to do a torque comparison at some stage. Should be interesting to say the least.

I also think the wheel speed on these dyno graphs aren't correct (I think Shaun mentioned that), as redline on my car in 3rd gear should be nearer to 200km/h than the 176 the run stopped at.

EDIT: Also, are those graphs all from the same day, or are there others there?

Edited October 27, 2005 by chops

[Cubes]

The only dyno runs that were not done on the day were Bl4ck32's and mine.

I mainly put them in there for a comparison to Sky30's, how much of a difference the small stocker turbo's make to a 3ltr running a GT35R .82.

The wheel speed is always incorrect.. But what I do think has been modified since Bl4ck32 and I ran on the dyno is the wheel speed/roller calibration.

As I know 100% at 2000rpm mine was making 100rwkw.

Can you post up or pm me the first dyno run? I'm keen to see how the power curve looks. I had mine ran in v8 mode on D&T's dyno, the power curve resembled the lump style power curve of your second run.

Edited October 27, 2005 by Cubes

[Cubes]

No time at the moment for wheel speed calcs.

Shouldn't be too far off as its only a 3.9:1 ratio, unlike Natho's 3.45:1, his run finished at 5100rpm.

Definitely looks strange how the run starts at 100km/h. What RPM was your run started at?

But it should be all road/roller speed related, every one drop their car in 4th and accelerate away.

Edited October 27, 2005 by Cubes

[chops]

No idea what rpm it was started at.

That's a bit of a problem with autos though, if you give it full throttle at any lower speed it would drop back a gear, which is why I guess it starts so high up in rpm. Tuners with the software have the luxury of being able to lock the trans in 3rd gear.

First run was done in a different V8 mode though, not Shoot_6, so I don't think it will give the comparison you're after. I only have the hard copy, if you really want it I'll scan it and drop it to you.

If you want to do wheel speed things at a later date, redline on mine should be 6200 rpm, so you can work back from there. (approx 35.2 rpm per indicated kph, which would suggest approx 3500rpm starting point)

[Deluxe]

Cubes mate here is my readout

[Sambo33]

[Deluxe]

Sam mate ours are quite similar....Sweet!

[gtrGhosTDoGG11]

Hey dudes, we should get all our turbo's highflowed at once and get a cheap price because we are doing 3-4.

[Sambo33]

Hey dudes, we should get all our turbo's highflowed at once and get a cheap price because we are doing 3-4.

<{POST_SNAPBACK}>

something i definately want to do, but unfortionately cant afford at the moment

[Deluxe]

Hey dudes, we should get all our turbo's highflowed at once and get a cheap price because we are doing 3-4.

<{POST_SNAPBACK}>

Sorry fella but mine is already........besides i need a fuel pump, AFM and a tune!!!!

[Cubes]

What highfow did you go deluxe?

[Deluxe]

Thankfully it was there when i bought it the previous owner got ATS to highflow the T3 to T4. When i get the other things i need and get it running right it should be sweet.

Edited October 28, 2005 by Deluxe

[Cubes]

Sky30's Dyno Sheet.

[Sambo33]

thats some very nice power there, i should have got an RB30 block

[Cubes]

The RB30 is nice but it also requires a nice manifold and decent sized turbo to prevent the top end nosing over.

It is nice though... I'm able to accelerate off the lights from idle and have it accelerate as hard from idle as a stockish (exhaust) LS1 Manual. Unsure if the edited ones have any more balls off idle or not.

So its definitely got some torque.

Wheelspin is a big issue for me at the moment, I put it down to worn subframe bushes causing axle tramp and a half stuffed diff that doesn't completely lock up, probably also causing part of the axle tramp.

God help it once its nudging 280.

Sky30's definitely sounds awesome on the dyno, I wouldn't mind grabbing either an audio file or small vid clip off some one at some time.

Edited October 29, 2005 by Cubes