My nearly stock RB25 Dyno

[flatrate]

Mostly stock, engine is built, but still stock turbo, manifold, injectors etc... only mods are:

Freddy intake manifold and Q45 throttle body

Boost set at 11psi +/- .5

stock injectors regulator and stock S14 fuel pump

bcpr6 plugs gapped at .22 (im going to increase this to .28)

i have a 3in downpipe, but it goes back into the stock s14 KA exhaust so its pointless

On 9ish psi it made 257 i uped it to 11 and it only made 10whp more... im suspecting that its probably from the stock 240 exhaust

the jump in Tq i think was from me dynoing in 4th gear vs all the others where in 3rd enjoy

Im really surprised that the AFR's are as good as they are, i hear people saying that the stock s14 pump isnt good enough and that RB's lean out without a FPR...

[FinkenS14]

Why is your gap so fricken small?

Stock gap is .043, and you got a bone stock motor.

[flatrate]

thats huge for a boosted engine...

Mines like that becuase i was getting spark blow out... now im not so it works for me

[eh?]

Not bad. wish you dyno'd at stock boost for a good stock base line.

[flatrate]

yeah, it made 257 at 9 so it should have been around 230 something on stock boost... altho i do have a greddy style intake manifold, not sure how much of a difference that makes

[meet07]

How in the world did you get your torque so high?? 250-270 is like wow!!!

Myu setup only made like 233 ft-lbs

[stevespeed]

all that before even a cat back!?

I need to get on my crap and turn up the boost thats nuts!

I am assuming that with the Freddy + Q45TB you also have an FMIC in the mix as well?

What is your timing set at?

and holy crap good numbers!

Ill have to try a different plug and gap, because I am seriously pigging my car out, I think my boV might be leaking alot as well.

PICS!!!!!!!!

[virus77]

It looks like the power takes a serious hit when the VTC switches off, I wonder if it would make more power having it activated all the time or at least for another 1k rpm. I'm gonna be dynoing my Z very soon and I'm definitely going to mess with its deactivation point.

were you getting any boost spike?

[WhatsADSM]

Nice numbers!

But why gamble on the stock fuel pump with such an expensive swap?

IMO just replace the fuel pump with a higher flowing unit. It's cheap insurance.

[flatrate]

I assume the torque is high because of the restrictive exhuast... it doesnt spike much maybe a half a pound or so

The stock fuel pump isnt just gonna crap out im on stock fuel pressure which is nothing over 65psi under boost... I bet a walbro isnt as reliable as a factory Nissan unit... However it will be upgraded once new turbo and manifold go on

Timing is set at 15 degrees (stock)

Its a fresh motor to its only got 800 miles on it since i built it..

[stevespeed]

well torque feel would be high due to an exhaust, but IDK....

thats still a s*** ton of back pressure open that up!

[Neejay]

Damn, I wish I could have built my motor. Nice hp.

I made 232whp @ 5psi with a cone filter, walbro + fpr, stock RB25 S2, and 3" turbo-back exhaust. I couldn't get an accurate tq reading.

I now have a FMIC and apexi cone filter @ 10-11 psi...but I think my coils are going, so I can't properly dyno just yet...

[l0nestar]

Nice numbers!

[flatrate]

well torque feel would be high due to an exhaust, but IDK....

thats still a s*** ton of back pressure open that up!

Its getting an AFI tubular manifold and 30R in the coming months...

[eh?]

Any chance of Dynoing after each upgrade? Pretty sad 7 years later we don't have any idea how much HP is gained through each upgrade.

I'll donate $5 lol

[flatrate]

Any chance of Dynoing after each upgrade? Pretty sad 7 years later we don't have any idea how much HP is gained through each upgrade.

I'll donate $5 lol

Nope to much work and some parts wont work without the others... turbo is T4 flanged anyways