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Please Help Me With My Very Lazy Gt2860-9's!

tommis85

By tommis85,
in Engines & Forced Induction

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tommis85
tommis85

Hey, yeh pretty much all sorted now. Haven't had a compression test done but she makes around the 400hp mark now which is good. Been ages since I've posted in this thread, can't remember if I updated

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SiR_RB Grand Master

SiR_RB

Posted
Posted (edited)

Came across a fella on another forum today who reckoned he was making 300kw/400hp on 16 pounds with these :D Gave me the lol's

dont laugh, my mate is making 286kw @ 14.5psi with gt-ss

Edited by SiR_RB
tommis85 Mentor

tommis85

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dont laugh, my mate is making 286kw @ 14.5psi with gt-ss

Hmmm interesting. But then and again I was making about 350hp with the ceramics at about 1 bar. I guess that with awesome turbos and an equally awesome tuner these crazy figures are possible.

Also, according to that chart flowing around the twin -9's are rated at about 560ps...but I'm pretty sure that's taken at the engine??? So if you were to account for drive train loses....you'd be getting back down to somewhere around the 480-500 mark. (don't know the conversion factor for ps to hp of the top of my head either....but i think they're fairly closer, a lot closer than hp to kw)

tommis85 Mentor

tommis85

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  • Author
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why only 14.5psi?

Very true that one!

Anyone know what the -9 / GTSS sweet spot is....ie, their zone of peak efficiency? I'm guessing it would lie somewhere around the 18 mark as mine go beserk there....

sydking Veteran

sydking

Posted
Posted

Did he tune it?

what gear is your new dyno run done in? I assume all tuneres use same gear, as max kw at 170kph dosent sound to practical, I pretty much wanna know power in 2nd or 3rd gear at 6k rpm....if thoes sort of graphs are even avalibe? I haven't looked to much into the dyno grqph side of things yet
Hadouken Grand Master

Hadouken

Posted
Posted

what gear is your new dyno run done in? I assume all tuneres use same gear, as max kw at 170kph dosent sound to practical, I pretty much wanna know power in 2nd or 3rd gear at 6k rpm....if thoes sort of graphs are even avalibe? I haven't looked to much into the dyno grqph side of things yet

You cant be serious

Different cars use a different gear on the dyno for a 1:1 drivetrain ratio

zebra Grand Master

zebra

Posted
Posted

what gear is your new dyno run done in? I assume all tuneres use same gear, as max kw at 170kph dosent sound to practical, I pretty much wanna know power in 2nd or 3rd gear at 6k rpm....if thoes sort of graphs are even avalibe? I haven't looked to much into the dyno grqph side of things yet

Dafaq?

6k rpm at wot and max boost will see the same power no matter what gear it's in

sydking Veteran

sydking

Posted
Posted

Like i said, I assume, as im not sure, you did not answer my question, let's just say anything over 110 is useless, your dyno shows about 150 kw at 110....like I said not surw how these things work/read

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