Hypergear Turbochargers and High flow Services Development thread

[arrydjay]

we both had no idea.... the car wasnt responding to anything... threw more timing= same power, richer=same power, leaner=same power wtf?

[arrydjay]

cant be intake restrictions, 4" intake with K&N pod, 3" custom IC piping....motor was running standard turbo before and was pretty stock..

The car feels good, it has brand new 255 federals on the back and it breaks traction when it hits boost in second, used to do it in 3rd with the old tyres..

Heaps weird...

[wolverine]

What ecu? No changes with fueling and timing makes you wonder if the changes are being written to the ecu.

Nistune was playing up like this on the Stagea last year with this sort of issue.

[arrydjay]

power fc... the changes were definitely writing because the wideband was registering the changes and the timing eventually caused the knock levels to increase slightly as well...

[Hanaldo]

Hypergear turbos love restrictions

I feel your pain though. Car has been sitting in the shed for a couple of months now, thinking about what it's done

[t_revz]

Hypergear turbos love restrictions

I feel your pain though. Car has been sitting in the shed for a couple of months now, thinking about what it's done

Has it learnt its lesson yet?

[Hanaldo]

Apparently not, it hasn't fixed itself yet. Now it's throwing a tantrum with the drivers seat, so it's in the naughty corner until I get back from Europe.

[hypergear]

we both had no idea.... the car wasnt responding to anything... threw more timing= same power, richer=same power, leaner=same power wtf?

That means turbo's pushing some thing's limit which power band does not responds to the tune. I think its in the exhaust or some where, try drop it and see if any thing changes. Was it a plumb back external gate?

Normally cooler restrictions would drop heaps of boost, and the cooler would be burning hot on the cool side. So its not the case.

Also if you are in Sydney might be worth while visiting Toshi for a quick check up.

[arrydjay]

dyno graph.....

[t_revz]

Why is the engine speed increasing then going back to zero? But speed increases gradually

I could be way off here but that torque looks quite high compared to power so maybe its getting wrong speed signal?

Rpm increases,decreases,increases then falls off

Edited November 13, 2012 by t_revz

[copycutter]

That is a weird lookin power graph. Gradually rising all the way to redline.

[arrydjay]

yeah the dyno guy said that for some reason some nissans do that weird shit with the rpm... he said it wouldnt affect anything but.

The power graph really supprised me because it feels nothing like that...it actually has nothing for ages then all of a sudden kicks in massively and frys tyres but that graph makes it look very linear.... very strange

[GTScotT]

when does it suddenly kick in?

[arrydjay]

pretty late....5k ish

[blah_blah]

Just got off trents dyno

265rwkw with coil packs missing all over the place

19.7 psi down to 15.7 psi drop

Trent thinks it will hit close to 300rwkw once we sort out coilpacks and boost drop

[t_revz]

That a bigger drop than most.

Yours is ex gate isn't it?

If internal do you have the extended arm?

[blah_blah]

Internal gate, note sure about the extended arm? Im guessing so.

Retune booked it for next Thursday.

Have purchased yellow jackets and will put in new spark plugs for the tune.

[GTScotT]

Nice work Tony! Results are shaping up nice. Try get that taper under control.

[blah_blah]

Trent made a suggestion that the boost drop maybe due to the stock BOV on the GTT not up to task? But were not 100% yet until I do the coilpacks and go back in for a retune.

Anyone know what the power limit on the stock BOV is before you need to be concerned?

He said to get a GTR one if it is the case.

[t_revz]

Looking at the waste gate arm you can see an extension or not. Gives more leverage