this doesnt seem right at all. (gen1 350z = s14rb25@12psi/PFC)

[silviasgp06]

so i tested my car against my friends 350z the other day.

s14,rb25 s2, 12psi, [email protected]/41psi(off vac),exhaust, PowerFC, 6000rpm shifts to be safe

stock 1st gen 350z

we were neck and neck all the way to 100mph, where i pulled off.It was like the cars were bolted to each other, no joke.

my understanding is the stock z puts about 230 to the wheels and it weight alot.

shouldny i at least be doing at least 270whp @12psi? which would of caused me to pull ahead, and also the weight difference.

the PFC is new in box tune state, i know it could use a tune, but I thought I also understood that its stock apexi map was all around better then stock the stock nissan map.

got stiffed on a wideband, so i still dont really know my afr's.

pretty sure it shouldnt have happened like this, so im assuming something else is up.

any imput?

[Shocker]

Your base timing might be off. Check it out.

[ka24de2006]

oh well idont think it was agood idea shifting in th 6k'sithink you should be somewhere in the 7k'sat least 7000-7400and yes the z has a cows weight it shouldnt be any where closeto this feathure

[240z4u]

Agreed with above, check base timing.

Sounds like your being screwed by the stock craptacular power FC tune. Richer then bill gates with my setup.

Shift when power falls off, this isn't a low revving motor so take advantage of it. I moved my rev limiter up to 7500 and it makes a world of difference being able to shift high enough and not hit the limiter.

Evan

[silviasgp06]

cool will check base timing.. again.

as for shifting i was noticing a lil bit of a knock reading so i stayed a lil low. I know a little bit of reading is normal but i dont know how much.

richer than bill gates a wide band and a tune are in the near future

[cdorhout]

Yes, definately not running at 100% if you can't beat a 350z. I was spanking those on my stock turbo.

[Darius]

Remember smoking my roommate Steve's Z that one day? God that was fun! Your stock RB25 acted way different (stronger) than my RB25 experience after rebuilding the motor with lower compression. I was about even with the Z's while on the stock turbo and intercooler @ 12 psi.

[gawdzilla]

i could not pull past a g35 coupe w/ exhaust (maybe more) in my s14 when i had my stock ka24 catback on but he wasn't getting away. i think the stock catback was keeping my boost at 8psi

[Shocker]

I got to play with an old man in a g35 while BPU, I was stuck behind him but found myself lifting so I didn't rear end him.. He was WOT.

[wawazat8402]

12-13psi, 3 inch fence pipe exhaust, fmic, and greddy intake let me pull a 350Z at 3/4 throttle in my gutted S13 hatch.

[eh?]

knocking when? At high rpm? A lot of times engine noise can be picked up as knock in the higher rpm range.

Either way it makes no sense to compare your car to anything if your shifting wayyyy below peak power.

[shawn_16]

my rb20 s14 dynoing @ 198 pulls on 350zsyou should have no problem with a 25...

[silviasgp06]

again, was shifting early because i was unsure about the knock reading, i knew about background noise but wasnt sure if this was the case. but yeah i will try again shifting higher, but apparently i should of still pulled ahead shifting when i did.

Also:was messing with my timing gun and it seems that it is messing up a little and it looks like its malfunctioning. So im calling a few friends today to try and borrow theres. Its one of those type with an adjustable advancing knob, well in the zero position it fires the light intermittently but perfectly once advanced.

[Carl H]

dont even mess with a timing light if you have the commander...just set timing with that.

[Darius]

You need to check to make sure the reading on the hand controller matches what you see with the timing light. Do this after the car is warmed up and the PFC is assuming the base timing of 15*.

[silviasgp06]

Carl, i thought like darius said below, that the PFC assumes base timing for example.

if you set the car to 15* then its right 15* motor 15* PFC

but say it you set it to 20* the power fc now thinks this is 15*, so 20* motor while the PFC still reads 15* at idle

that what i thought everyone ment by the PFC assumes base timing was set to 15* which is why a timing light is needed

[Carl H]

mechanical base timing is still at heart set by the CAS.i dont set my timing with a light anymore, i use consult to do so...if the pfc says its 15* then base is 15* if its anymore or less then thats due to the cas being off.go by what the pfc says...its real time timing.cas adjustment is correction for such as a streched timing belt or minor physical tollerance issues.with the cas set dead center the pfc (or any ecu) that the cas is at "0*" compensation, rotating it left or right will change that correction to what the ecu lays down as base.

[Kansei240sx]

I had this same problem when i was neck and neck with my friends 350Z, although he had, headers, full exhaust, intake, wideband, fuel controller etc...

We were neck and neck. I figured out my problem when i installed my wideband later that week and i had an SAFC2 and corrected the fuel by -5 percent and went from 230 rwhp to 272 rwhp in one pull on a guess, because i was reading around 9.1 afrs. i had the same mods you listed now, back awhile ago. Timing was spot on, and i was running 13 psi. You're running fat as hell making the car pig. Lean it out and tune it, thats where your problem lies i can almost garuntee it.
Modified by Kansei240sx at 5:40 PM 6/12/2008

[240z4u]

Carl, i thought like darius said below, that the PFC assumes base timing for example.

if you set the car to 15* then its right 15* motor 15* PFC

but say it you set it to 20* the power fc now thinks this is 15*, so 20* motor while the PFC still reads 15* at idle

that what i thought everyone ment by the PFC assumes base timing was set to 15* which is why a timing light is needed

You are correct in your understanding. I always verify my base timing with my timing light.

[silviasgp06]

thanks again all.ok set timing, seems a little better...

Kansei240sxi understand what your saying but one thing stood out, your 9.1 AFR, isnt that kind of dangerously lean? especially since im assuming you are using the factory ecu because of the safc.

[Kansei240sx]

thanks again all.ok set timing, seems a little better...

Kansei240sxi understand what your saying but one thing stood out, your 9.1 AFR, isnt that kind of dangerously lean? especially since im assuming you are using the factory ecu because of the safc.

No, 9.1 is far from lean.... Dangerously lean would be like 14.7:1+ Under full load and higher boost.

9 parts of air for one part of fuel, which is less air to fuel vs, 15 parts of air for one part of fuel which is less fuel to air. Make sense?

[silviasgp06]

ha, nm i dont know why i was thinking backwards

[lucky7]

I got to play with an old man in a g35 while BPU, I was stuck behind him but found myself lifting so I didn't rear end him.. He was WOT.

SAME thing happened to me one time. i was messing around with an older guy. but he was in an E46 M3. he took it up to 120, and i was right on his rear. like within feet. i loved it. i had to let up a couple times so i wouldnt hit him. hahaha. cant wait to walk past them now.