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Rb26 Turbo Comparision Graph (from Latest Hpi Mag)

CruiseLiner
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CruiseLiner Mentor

CruiseLiner

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hey guys i just got the latest HPI magazine and i found a good article on the hks t04z, and they tried the t04z on 1.4 bar on a stock internal engine.

the housing is the 0.81, and the car has hks 264/272 cams as well, plus the pfc djetro

they managed a solid 425.1kw at wheels on the 1.4 bar and climbing fast they said.

heres the dyno graph with a comparision to a few other sets of turbos on a gtr

the article was done at Willall racing as well.

they mentioned the to4z needed more rpm and more boost to show its true potential, and over 500kw is acheivable for sure.

IMG_1424.jpg

i noticed the gtrs's are no were near as laggy as the t04z but i suppose it doesnt show the true results until both setups are pumping more boost and pushing the setups to the max.

any thoughts?

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R31Nismoid Grand Master

R31Nismoid

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Is it just me or does the t04z graph seem to be a little later than the normal?

People have run off 450rwkw on i think 1.6 or there abouts, so they will make good numbers.

Would have been good to see the meaty 2530 line on there to compare aswell.

I take it the graphs of the other turbos are from other motors, of unlisted spec?

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CruiseLiner Mentor

CruiseLiner

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Is it just me or does the t04z graph seem to be a little later than the normal?

People have run off 450rwkw on i think 1.6 or there abouts, so they will make good numbers.

Would have been good to see the meaty 2530 line on there to compare aswell.

I take it the graphs of the other turbos are from other motors, of unlisted spec?

hey ash, im not sure on the specs of the other setups, but i'd say they are all on stock engines except maybe some bigger cams.

its in the latest issue of HPI (no. 68)

i reckon the trust turbos (t518z's) are probably the best lookin setup on that graph for overall power. though it say the other turbos (besides the t04z) will all run out of puff soon and the t04z is only just starting to get going.

do u think if they ran more boost on the t04z it would make more power earlier and not look as laggy as suggested on that dyno graph? surely the midrange will pick up and catch up to the others alot quicker?

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Beer Baron Grand Master

Beer Baron

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at 152kmh the trust ones are making 325kw and the T04Z is only making ~240kw. big difference. especially considering on that particular set-up/test they are making the same peak power.

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CruiseLiner Mentor

CruiseLiner

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the graph says t5187z x 2

does anyone know how to work out the rpm instead of kmh on that graph with the gtr 4.11 ratios?

also whats the true max power potential of each turbo setup? (at the wheels, not engine)

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Busky2k Veteran

Busky2k

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I'm pretty sure I know who's GTR that T517z graph was based on. I've been in the car and yes... it pulls hard but it seemed to die off past 7300rpm but the graph doesnt reflect that. Also it took a while for the turbos to spool up again after a gearchange, well it seemed like that to me anyway.

Needless to say when the owner did a 8000rpm launch with RE55s it was like literally being punched in the guts!!

The T517z also have more to go because its not flatlining away in similar fashiion to the T04Z.

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Blitz Grand Master

Blitz

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The GTRS would be the fastest street car outta those turbos for sure. I'm quite suprised actually that the GTRS was as responsive as it shows.

I was thinking the same thing.

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R31Nismoid Grand Master

R31Nismoid

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for 517's to be into the 400rwkw range they must be using some hoofing boost

still, if its compared to "other" cars graphs thats not the best of idea.

Who knows what parts the other cars have listed on em

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shanef Grand Master

shanef

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wats the next step up from the gtrs's for a responsive power curve. this also being on a fully built rb26/30. i want 700awhp but dont want massive lag, and also dont necessarily want to keep the turbo's in the stock 'position', so to say

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