Rb26dett Cams Std Turbos

[rob82]

Just wondering if anybody has put larger cams on the standard turbos. It might end the debate to weather shaft speed or detonation is the killer of the standard ceramic turbos. ie running 13-14psi after cams are added.

[R31Nismoid]

heat is the killer of the ceramics

[Beer Baron]

ronin09 has tomei poncams w standard turbos. i'm sure it's been done plenty of times. I have adjustable cam gears on mine with standard turbos also. i found a similar gain by adjusting them (around 30rwkw). both our cars are running at ~250rwkw.

[Ronin 09]

ronin09 has tomei poncams w standard turbos. i'm sure it's been done plenty of times. I have adjustable cam gears on mine with standard turbos also. i found a similar gain by adjusting them (around 30rwkw). both our cars are running at ~250rwkw.

<{POST_SNAPBACK}>

what he said^

[rob82]

Faif enough, what boost you guys running? What cam specs?

[Beer Baron]

just under 14psi for me. cams are standard cams with an hour or two spent adjusting both inlet and exhaust cam timing.

from memory ronin has the 260/260 duration Tomei poncams (9.5mm lift?). also running around 14psi.

[Beer Baron]

interestingly i was just comparing our two dyno graphs. my peak was 253kw as was ronins (though we tuned a bit further and ended up with 247 peak, but more mid range torque).

Comparing at points along the graph it's interesting to see that ronin has just a few more kw's at each point but the shape of the graphs are virtually identical. interesting that two different set-ups tuned at different places ended up with near identical figures, and identical curves!

[druzilla32]

from memory ronin has the 260/260 duration Tomei poncams (9.5mm lift?). also running around 14psi.

<{POST_SNAPBACK}>

they are the same cams i have in my gtr, i have standard turbos.

im not sure how the new cams are yet..

[Ronin 09]

interestingly i was just comparing our two dyno graphs. my peak was 253kw as was ronins (though we tuned a bit further and ended up with 247 peak, but more mid range torque).

Comparing at points along the graph it's interesting to see that ronin has just a few more kw's at each point but the shape of the graphs are virtually identical. interesting that two different set-ups tuned at different places ended up with near identical figures, and identical curves!

<{POST_SNAPBACK}>

I'm slow in the uptake today.

what he said. 260 / 260 9.15

I wouldn't expect too much gain on stockers, apart from boost coming on a little lower - BB - I don't have plot of PSI vs power, but can you compare where boost / power ramp ups are between the two graphs.

They will help breathe alot better with some slightly larger twins.