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Need Turbo Selection Help

StealthX

By StealthX,
in Engines & Forced Induction

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krizza_ca18det Apprentice

krizza_ca18det

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krizza_ca18det,

check out myspecv.com

thats a car in the US with the same QR engine.

DOZENS of guys have turbocharged those engines.

a few guys have even used a GT2871r turbo, which is infact smaller than the VG30ET turbo i have sitting infront of me.

Yeah, but the Sentra specV is like the Pulsar SSS of the Sentra range so it wouldn't surprise me if it runs different cams to the X-trail QR25DE which let it breathe better higher in the rev range.

The GT2871r might be a smaller frame turbo than the old VG30ET T3, but it flows a lot more air (400HP rated in 52T 0.64AR trim).

StealthX Veteran

StealthX

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Yeah, but the Sentra specV is like the Pulsar SSS of the Sentra range so it wouldn't surprise me if it runs different cams to the X-trail QR25DE which let it breathe better higher in the rev range.

The GT2871r might be a smaller frame turbo than the old VG30ET T3, but it flows a lot more air (400HP rated in 52T 0.64AR trim).

yeh thats true.

but i know for a fact, the B15 (2000 - 2007) QR25DE used in the sentra is EXACTLY the same engine as the T30 (2001-2007) x-trail's.

same sepcs: 245nm of torque @ 4000rpm, 132kw @ 6000rpm

and very similar torque curves from what i hear, everyone reports the same decrease of power over 5000rpm and the mass amounts of lowdown torque.

i know for a fact the new x-trail's engines are very different from the new sentra's.

the aussie spec qr has a 9.5 CP where as the US spec has 10.5 with completely different internals.

plus the aussie spec was down tuned in 2006 to 125KW due to emissions, and the us spec is rated at 151KW.

with the HP rating, keep in mind im not after mass amounts of peak HP.

maybe 250-270whp at the most, and as you said yourself, my aim is to add mid range.

if things work out well, i might build up then engine including cams and low comp pistons later down the track if im looking for a high rpm monster.

but for the moment, everything's going as conservative as possible. im after driveability in this setup. i just want it to be plain fun to drive - not a 1/4 mile killer or a dyno car...

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