Dynoed my Silvia at low boost

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Nov 29, 2001 | 02:51 PM

#11 (permalink)

Raflindy Melendez

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I miss my GT25 it was spooled at 2500
Majestic DAVE told me not to pass 1350 f ?
My block is still stack and the head just has cams and springs

Nov 29, 2001 | 11:24 PM

#12 (permalink)

Matt Vassallo

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i have a stock block with nismo cams that suck ass by the way

never get fucking nismo shit it is sooo close to stock you hardly tell a difference
i hate it

man

your turbo isnt working if its not red hot

lmao

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Nov 29, 2001 | 11:27 PM

#13 (permalink)

Matt Vassallo

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oh ya one more thing dude

umm

1550 will probably be the max you want to go with a t3/t4 or t4

smaller turbos go 1700 sometimes

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Dec 4, 2001 | 05:04 AM

#14 (permalink)

StreetRacingOnline

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We usually tune the cars to about 800-810 degrees Celcius on the dyno to insure a safe wide A/F ratio. Just incase the weather is too hot or something or the weather becomes to cold and overboosting occurs. With the conversion table being aprox. 9/5 The FarenHiet measurement should be around 1440 or so. That would be safe. Your 1550 is insane matt but I think we discussed why. You can tune it that high because of your really low comp ratio.

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Dec 4, 2001 | 06:55 AM

#15 (permalink)

v8killer

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Ralph

The reason that you lose power by switching to the smaller turbine housing is because this introduces more backpressure between the exhaust ports and the turbine housing.

This increased backpressure decreases the volumetric efficiency of the engine making it harder to get air into the cylinders hence less power.

For example a T3/T4 on an SR20DE(T) will yield about 245 whp at 10 psi whereas a T25 at 10 psi will yield only about 195 whp. The smaller T25 has a smaller turbine and the backpressure is higher.

Switching to the smaller 0.59 A/R turbine housing will give you better spool up but the power will be down some particularly at higher boost levels.

By the way what cams did you get?

Dec 4, 2001 | 02:06 PM

#16 (permalink)

Raflindy Melendez

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EURO cams for the fwd GTI-R

Dec 4, 2001 | 09:34 PM

#17 (permalink)

Tron from da Ci-tay

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EGT should noy exceed 1350 on forged pistons... You need to play w/ the fuel and timing.

Dec 5, 2001 | 06:40 AM

#18 (permalink)

Matt Vassallo

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for all motors it is different i guess

im just saying works on the nissan turbo sixes such as L28 / l24 / Vg30 / Vg30D / RB20 /

from the guys ive talked to 1500 is a-ok

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Dec 5, 2001 | 08:31 AM

#19 (permalink)

v8killer

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So are they stock GTi-R cams or are they an upgraded GTi-R cam? I think Nissan Motorsports (and Stillen) sell these.

Are you still running the hydraulic lash adjusters/lifters?

Let us know your new numbers when you hit the dyno again!

Peace