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Does this look about right fellas? Looks like a fair bit for pretty stock...
Mods are :
3" straight through exhaust
T boost
Blocked egr and butterfly removed
And running 305/70-16 tyreshttp://www.nissanpatrol.com.au/forum...017/07/188.jpg
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Seems about right to me for a near stocky... How does it feel to drive?
How boost are you running? JPC do seem to read higher than others but is hard to say without seeing a dyno pre tune as such.
What isnt right is the dips in the curves someone who doesnt know what they are has played with your injector pump.
@MudRunnerTD knows all about this on a td42ti engine.
Feels heaps better mudski, its a different car!!
Nissannewby the boost peaks abouts 16psi, the pink is the first run and the blue is after they have tuned it...
A mate of mine said the probly done the run in 3rd instead of 4th?
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Yeah they always look like they are done in 3rd but other guys here reckon they get done in 4th but the speed readout says otherwise.
Do you know if jpc or anyone has adjusted the timing at all?
Yeah a mob in bendigo done the timing a few years ago, is that why it dips a bit on the graph?
Is that a bad thing?
Sorry i dont know much about it
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Yes it should be a fairly nice hump sort of look. Or even quite a good rise to your peak number then just tapers off until the end of the run. I will post one up to show you the difference.Quote:
Originally Posted by menis
The dieseltec one is @MudRunnerTD run. You can see the drive in tune (blue line) has a dip in the midrange. The other caboolture one is a bit more setup but shows what Im trying to describe in the power and torque curves. You can also see why the JPC one is most likely in 3rd gear these 2 runs go out beyond 120km/h in 4th.
Attachment 72524Attachment 72525
Yeah it's a shame there is no rpm reading in the Dyno from JPC but peak power at 60km/h is a full gear different I'd say for sure. Makes the power curve nice and steep but reflects a 3rd gear run rather than a bigger 4th gear ratio.
As Matty says the curve looks pretty lumpy. I note also your untuned run saw mid 70s and factory they generally produce in the 60s especially running 305s.
I had mine tuned 3 times at 3 different tuners over 7 years and Always had issues with extreme exhaust temps. Watch out for your exhaust temps. Do you have a pyro gauge? If you don't then it should be the next thing you buy! Especially with a tune like that. That's pretty good power out of a stock turbo so I wonder how close to the line your running mate.
On Mattys advice I paid to have my pump timing done again and it was found that my pump was advanced and made bad power. Resetting the timing to Factory settings and Undoing the half assed tunes done before transformed the car.
Taken from my Upgrade threadQuote:
Originally Posted by MudRunnerTD
Hey mudrunner,
Thanks for the info mate!
Do you reckon if it was in 4th the curve would smooth out a bit more?
Yeah mate ive got a pyro and boost gauge in it, it doesnt run much hotter than it did before?
I havent had it on a massive hill yet towning tho!
Wish i went to diesel tech before i new all this n spent $380 haha
It should be ok on this tune for a while till i get another one yeah?
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Yeah just watch your EGT especially on the big hills and you should be fine.Quote:
Originally Posted by menis
Hey Menis. My 4.2 was tuned there twice. First run I don't know what gear they were in. But the second dyno months later after my intercooler was fitted, the run was 200% done in 4th as I was there watching it...
I have no clue why their read outs are set to point to a 3rd gear run ... and I always forget to ask everytime I'm there.
The Dieseltec dyno seems to be much more comprehensive though.
http://www.nissanpatrol.com.au/forum...id=72860&stc=1
I tend to find JPC's dyno quite modest to be honest with you as I have always found there figures are quite low compared to other dynos
I have seen most probably at least 30 cars in my time on their dyno and I'm almost certain they tend to pull a 4th gear run as hodgy was saying...
Not long ago I was there watching a blokes vl turbo get tunes which pumped out 563rwkw ... that night of the tune he was invited to a dyno day at another performance shop as a promotion and they heard he had 560+rwkw and had asked him to out his car on the rollers.
He was a little reluctant at first but fell to peer pressure...
So with everyone standing around talking about this particular rig word around the vehicle was getting around that the thing makes 560+rwkw...
When the guy ran the car up he managed to pull a staggering 607rwkw
As you can imagine the owner of the vehicle ran up to the bloke and started yelling profanities at the dyno bloke saying to him wtf are you doing what did you touch in my car???
The guy swore he did nothing but run it on the rollers and showed him there's no computer hooked up...
Sad thing was given it was his businesses dyno night it soon made everyone realise he has a "happy" dyno...
I AM currently getting my barra turbo engine conversion done at JPC and we are expecting around 400rwkw
I will be sure to keep you guys posted how I go when it's done.
Hope you're all well