My Laughable Dyno Results

[R31Nismoid]

the bottom graph looks more like a TE graph as it falls away, the top one barely falls away at all and that doesn't make sense as TE will always drop away as if you look at the second graph the power holds.

But then i could be totally wrong and confused

[The Dan]

Almost identical setup we made 485hp at the wheels and I think it was hitting 19psi (max boost) at about 110-115km/h

Definitely some small improvements to be made but looks like you got the AFR's pretty spot on. Not bad for a street tune considering you have no idea what the torque is doing. It might accept more timing in the top end? Anyway still a decent result considering

[blue_vl_t]

I'm just setting up another boost gauge that has a 30psi scale, will check and record what the boost is doing on the street, hopefully it will remove some confusion.

The air fuel ratios need some more work, but considering they are not miles off I left it as is until I can get everything performing in the ballpark.

[blue_vl_t]

Ok so after checking the boost pressure on the road with a mate, we have found it to be 26psi dropping to 25psi.

With this knowlege i will continue working around it to see what i can find.

may back the boost off to 20 psi as well until i know what is going on......

[blue_vl_t]

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?

The cams are drop in items with a reduced base circle, thicker shims etc

There wasn't a card with them, so i just have them set as per standard

[simpletool]

Ok so after checking the boost pressure on the road with a mate, we have found it to be 26psi dropping to 25psi.

With this knowlege i will continue working around it to see what i can find.

may back the boost off to 20 psi as well until i know what is going on......

Yep, boost is the top line. I thought it was the 20psi line for a second then traced the line back. It had to be the top line as the bottom line starts at 10psi.

The AFRs look very good. You take a touch of fuel out of it, but not real need. Hopefully its an exhaust problem with the slow boost/low power.

Perhaps with the new boost setting you might be able to get a fair chunk more timing into it and make similar power.

[blue_vl_t]

Strange thing is, i drove another r33 gtr today, -5's 350 rwkw, with dyno sheets etc and my car did not feel slower, may need to buy myself a private road to do a bit of a test for comparison.

[blitzkreig]

what fuel is this on?

[Rolls]

What exhaust are you running? Could you drop it to see what the difference is?

[WHITER33GTS-T]

300kw @ 25psi.... Something is way out there.

My old RB25 made 300 @ 17psi with a TD06

[blue_vl_t]

cars running on BP ultimate

The exhaust is all explained in the first post.

As much as i sound like a tosser to say it.... it seems like the dyno is wrong??

I've owned 3 different setups in cars that have run low 11's one was running 126mph with 330rwkw in a vl

This seems quicker that all of them to drive, seems to turn the tires coming onto boost into 3rd in rwd only fairly easy in a straight lie too.

When we were first running it up, the most it would make was 24hp, because of some incorrect setting on the dyno, lol

[simark87]

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......

Dude..no I didn't laugh coz you said not to but..you're right..that's shit :-)

Reading that was like those 'starving in Africa' adds that make you take pitty! So here's my donation mate...

If you like pm me your details and I'll send you a red hot V2 Boost Controller. Make sure teh system is sorted then hook up the V2. You'll be bale to run whatever psi you like rock solid..

In fact it holds 60psi rock steady under test and to be honest I havent even tried to find its max. it's all in teh desin of the seat and teh speciallly imported ball for the gate that seals solid. Normally gated controllors have a hard metal ball on a metal seat..the V2 has a metal seat but the special ball is not metal or ceramic. It is hard but has some flexion so it seals tight. It's freakin magic!!

Cheers.

Mark form Turbotech Performance

[DVS JEZ]

Take it to the strip and see what time it runs.

[T04GTR]

profec b boost controller, 1 bar actuators and that should do it. also lift the lid on the airbox and after to see the differance.

[blue_vl_t]

Dude..no I didn't laugh coz you said not to but..you're right..that's shit :-)

Reading that was like those 'starving in Africa' adds that make you take pitty! So here's my donation mate...

If you like pm me your details and I'll send you a red hot V2 Boost Controller. Make sure teh system is sorted then hook up the V2. You'll be bale to run whatever psi you like rock solid..

In fact it holds 60psi rock steady under test and to be honest I havent even tried to find its max. it's all in teh desin of the seat and teh speciallly imported ball for the gate that seals solid. Normally gated controllors have a hard metal ball on a metal seat..the V2 has a metal seat but the special ball is not metal or ceramic. It is hard but has some flexion so it seals tight. It's freakin magic!!

Cheers.

Mark form Turbotech Performance

Haha, this is the best post yet, because i'm already running the new V2 Turbotech boost controller,

bought it from you a few months back

nothing against them, for the small price, it works well, adding an extra 10 psi it does the job.

Now we can all see the boost is dropping away, but its a fair amount of boost for these turbos.....

on the road i held it flat in 3rd and am seeing 1 bar at 4200-4300, which i thing is really not too bad, i'm not sure checking boost response on the dyno is the best way.

Cheers though for the offer mark, honesty it has good mid range and boost response for these turbos, it really is doing a good job, just not on the dyno.....

Edited October 23, 2011 by blue_vl_t

[zebra]

lol ZING!

[simark87]

Lol. Zing!!

Well I'm glad to hear that teh V2 is doing its job and not the casue of your woes!!

Cheers

[T04GTR]

is that like one of those "electronic" bleed valves, that uses the propper soilinoid but just sends it a constant duty cycle so i sounds like a jackhammer in the engine bay with it turned on?

[scotty nm35]

You'll be bale to run whatever psi you like rock solid..

I dont think its very helpful making comments like this, there is no way your magical manual controller will help when it is obvious the wastegate spring is too weak to hold the manifold pressure.

[blue_vl_t]

ok, so i thought id share an update...

I'm in the process of pulling the turbos off and replacing the dumps, front pipe and whole exhaust.

what i did find is while assembling the exhaust i must have mixed up two of the gaskets on the front pipe, so being the original front pipe is 2.5"x2 into 3", yep you guessed it, i have a 2.5" gasket fitted on the 3" outlet.

So my poor bus was attempting to shove all its air through just over 2.5" diameter..

This could explain its flat line and not wanting to produce power over 300 odd RWKW