My Laughable Dyno Results

[blue_vl_t]

Ok so, my car is shit, that's a good start.

but seriously

I always road tune my car, just do it myself with the data logit package etc.

Thought, hey why not throw it on the dyno and have a quick look at where i am at.

I'm about to upgrade the exhaust and thought it would be interesting to see what difference is made and was thinking of helping out this site with some real world data etc.

my car ......

R32 GTR

R33 rb26 stock bottom end

JUN 264 9.7mm

700cc sards

z32 AFM's stock airbox, KnN panel

2860-5's

exhaust is...

HKS copy dumps

some no name s/s front pipe 63mm x 2 into 3"

3" decat

HKS super dragger

The dyno i used is a Dyno Dynamics with latest software etc, owned privately.

The owner has tuned a few cars but, he left me to my own to use his dyno etc and just go for it.

This is great for me, because i love playing with this sort of stuff etc. Not awsome for when i would like support.

When i went i hadn't slept for 23 hours, because of night shift, yep, shit idea, so i really wasn't on the ball on the day either,

any way, results....

Top graph boost and tourqe

bottom kw and AF

dont laugh......

Edited October 20, 2011 by blue_vl_t

[zebra]

fix the boost drop and it will be about right

[blue_vl_t]

You think so?

I was thinking i was running 1.5 bar, i have a 1.5 bar gauge and upped the boost until i thought it was at the top of the gauge,

so was quite shocked to see what his dyno had to say, assuming i was running 22 psi max, i assume his sensor is reading ok???

I will fit a better gauge soon anyway to see for sure.

[blue_vl_t]

I really think the top of the graph is really flat.

perhaps indicating an exhaust upgrade, which i will be doing regardless.

one other thing i was thinking, with the stock air box, i only run the stock air feed, i will remove the 'chamber' from the botom of the box to see if the extra 3" hole makes much difference.

really looks like a restriction to me, the power just rises and stops dead, then flat lines......

I have my theories, but i'm keen to see what people think if could be

[zebra]

ditch the split dumps, do you have adjustable cam gears?

[blue_vl_t]

I have some HPI 3" dumps and twin 3" into 4" system to go on, just needs a few more bit modified etc. should be soon

Also i do have some cam gears, but not fitted, mostly because they are ebay ones, and i'm unsure if i should trust them???

[zebra]

well the exhaust is sorted, try it first if you don't wanna fit the cam gears

[blue_vl_t]

fair enough too, but really, a 3" exhaust, i would have though the power would have kept pulling to the limiter, perhaps 330-340rwkw

Do you thing the graph shows a bottleneck?

[zebra]

could be causing the boost drop

[HEKT1K]

It also looks a bit lazy onto boost... I know -5s aren't exactly punchy on a 2.6L but surely you should be hitting 20psi a bit earlier than that?

[blue_vl_t]

true, i only have a cheap ass turbotech valve on it too.

Before a retest i will

remove the chamber from the air box

install a EBC, probably Profec B 2

install the new exhaust.

Triple check the cam timing and base ignition timing.

funny thing is, with any more than 14 degrees of timing the power seemed to drop, unless the heat soak make s a huge difference??

Ahh the joy of learning

[blue_vl_t]

It also looks a bit lazy onto boost... I know -5s aren't exactly punchy on a 2.6L but surely you should be hitting 20psi a bit earlier than that?

I was thinking this also, "big" (lol) rush of power seems very close to 5000rpm on the street

Edited October 20, 2011 by blue_vl_t

[zebra]

Ill bet with the new exhaust you will be able to run a heap more timing and pick up some response to boot.

[blue_vl_t]

Ill bet with the new exhaust you will be able to run a heap more timing and pick up some response to boot.

lets hope so.

I really wanted to do a before/after test, will be good for me and the forum, if it makes the difference to push power over 350rwkw where it should be i will be quite shocked!!!

[R32 TT]

Be Interested to hear your results once you upgrade your exhaust system. Think you'll find boost comes on a lot sooner..

[R31Nismoid]

true, i only have a cheap ass turbotech valve on it too.

Im just running off actuators and a bleed, on much sooner than you are

Fix the exhaust, also check the cams are correctly dialled in, that can often be a problem.

Get 20psi holding rather than falling away to 15psi and you'll be right.

[blue_vl_t]

Im just running off actuators and a bleed, on much sooner than you are

Fix the exhaust, also check the cams are correctly dialled in, that can often be a problem.

Get 20psi holding rather than falling away to 15psi and you'll be right.

on the top graph, the boost is dropping from 27 to 25 psi, fairly sure thats right.............

[R31Nismoid]

Oh yes indeed, looking from my phone again, i should stop doing that

The boost graph is even lazier then than i thought now im looking from my PC.

Definately exhaust and get the boost control sorted so it comes on much earlier like it should. It still could indeed be the cams not dialled in correctly too.

[D_Stirls]

Are the JUN cams drop in? I'm assuming that since you haven't fitted the adjustable gears you haven't degree'd the cams in. Did they come with a timing card?

[GTScotT]

on the top graph, the boost is dropping from 27 to 25 psi, fairly sure thats right.............

No thats wrong, thats your torque. Notice it starts way off the charts for what you could consider vacuum? Whereas the other one is accurate for what you expect.

Your boost is hitting 20 and bleeding down to 15.