Did 3 runs on the dyno today with the Z. best is 252.9 whp and 239.4 ft/lbs. Does that sound right? I've seen a lot of other stock Zs dyno around 230-240. Also, Integrity came too (stock also) and got ~249whp.

 

people are dynoing all over the place

It seems like people on the east coast generally dyno higher than people on the west coast.

I've seen 220whp -256whp on stock manual Z's

 

I agree...

 

My stock was 235whp and 230wtq. that was in the heat of summer in florida and 3k miles on it

 

Thoses are some good numbers.

 

Couple of things:

1) You dyno'd on a Dynopack. Those generally dyno higher because they bolt directly to
the hubs, not taking into account the loss of power from the wheels.
2) I can't tell from the pic you provided, but were the numbers SAE corrected? If not, that will inflate numbers as well.
3) What gear did you dyno in? Manuals should be 5th, auto's 4th.

 

What was the correction factor on the dyno?

 

don't forget...east coast regularly gets 93 octane vs 91 on west coast for premium.

 

I guess your #s sounds about right on a Dynopack?
I dyno'd my bone stock Z at 256whp and 244tq (SAE Corrected) on a dynojet
Edit: Dyno is done with 91 oct gas and 5th gear (In case anyone asks)

 

Here are my numbers...

249.0 HP SAE @ 6149 rpms
246.6 ft/lbs. @ 4742 rpms

We both have M6s and the runs were done in 4th gear, not fifth.

I believe the correction factor was 1.00.

Can someone explain to me how these effected my readings?

 

Not trying to flame... but honestly if the west coast guys are really upset with 91 octane then why not add octane boost to your gas? I mean atleast for a night at the drag strip or a trip to the dyno. If it helps, cool... if not, no harm done. Lucas Octane Boost is $9 per bottle at Advanced Auto Parts and is 3x the legal limit of performance additives. Not even "street legal" and it will get you up to atleast a 93 octane equivalent, especially if you only add it to about a 1/2 tank of gas.

Try it, maybe it helps.

 

A while back, Turbo Magazine did a dyno test where the took a bone stock Z to 6 different dynos in SoCal in the same day. Here are the numbers they got.

Turbo Magazine Dyno Dash Comparison Chart

Dyno HP TQ
Dynapack 249.4 242.8
DTS 257.6 556.5*
Dynojet (Win) 235.8 227.8
Dynojet (DOS) 243.7 237.2
Clayton 265.7 240.6
Super Flow 228.9 226.6
*measured at roller without accounting for gear reduction

 

Who is really upset about 91 octane? I just saw a couple mention is a possible difference between all the numbers people are seeing. You must be reading a different thread than I am

 

I bet if you had a Dynojet in Linux, it would produce even better results.

 

Not just on this thread, it shows up very often on multiple threads regarding dynos and 1/4 mile runs. Was just a suggestion to attempt to correct the problems instead of using it as as crutch when your car doesn't out perform everyone else . I mean, OMG it can't be the driver? nah

I agree, 91 octane doesn't max out this 10.3:1 compression engine, so why not boost it with an additive ... atleast to make sure.

 

Ok, cool. So my numbers are right on then. So did Turbo Magazine take 6 different Zs to all of those dynos, or are all those numbers from the same Z? 228.9 to 265.7 is a huge gap.

Also, can somebody explain what the correction factor does? Thanks.

 

Dynapak dynos do tend to read higher.

Here in the east coast, we can get anything from 93, 94 (sunoco).. i've even seen sunocos carry 100 unleaded pump.

 

350Z for US market has timing setup for 91oct gasoline. Putting in 93oct should do nothing, unless you can advance timing. Its the case of setting things up for the lowest common denominator. For those who think it'll make a diff, take a stock Z, put some 100oct race gas (unleaded) into it, and see if there is a diff on a dyno. I'll guess at a very small diff, except car may run smoother from run to run.

 

Interesting. So I can advance my timing a bit and unlock some free horsepower? I only use 93 octane.

(I'm not trying to be a smart @ss, this is a serious question)

 

Isn't the timing advanced or retarded automatically because of CVTC? ( I think thats how you spell it). I know the original VQ has this on the Intake side and the new engine has it on both the Intake and Exhaust side. If so, the computer should compensate for the higher octane fuel and result in slightly more power.

Just my .02 / thinking out loud.