287HP

Just got my nismo cams and borla td installed. Car pulled a max hp of 252 at the wheels. Baseline with a pop-charger and grounding kit netted 233 at the wheels. Note how the torque increases after 5200 rpm. Car definitely pulls harder in the upper rpms. Runs were done in 4th gear on a dynojet.

failsafe

Were you the black Z that Robert (Stage Motorsports) did the cam install on? Did you happen to get your a/f during the dyno?

287HP

yes, I was. My air/fuel in upper rpm's was 12.9.

Xeinth

very strange that the lowest torque point was right at 5252.

X

PhoenixINX

Time for headers and high flow cats.

You have to uncork the power... those OEM manifolds and cats are killing ya! Only gaining 16hp is proof of this... example in hand headers, cats, and the plenum netted 20 at peak... near 40 at redline!

You've done the hard mods! Now help your baby breathe!!!

BTW - your chart is saying your max was 249.2 and you're saying 252... Am I missing something?

287HP

I hit 245 on the first cold pull. 250 on the second. 249 on the third. And 252 on the fourth pull. I think my numbers would be higher if I would have broken in the cams a little bit. The car only had 6 miles on it with the cams before the dyno. I also have not advanced the timing yet, which I plan to do. I would like to put on high flows, but I'm worried about running too lean.

PhoenixINX

Don't touch the timing yet... the outcome still isn't for sure - Crawford's is checking into this as we speak... should hear back on it soon!

The timing was advanced on Dougs car and it pinged like hell - we had to pull out of the run per almost detonating.

As for the cams breaking in? Never heard this... Piston rings and seals are what breaks in. If this was NOT a brand new car, it was plenty broken in.

You're fourth and fifth runs, the oil should be getting warmed up... and you'll be seeing the best gains.

As for running to lean? Just watch the a/f carefully... the car tends like running lean oddly enough. Make sure you listen for detonation and abort the run if you do. Are you comfortable in listening for it?

I guess the only thing troubling me... is you're the first person that has thrown cams in with nothing else. It's like building a house, without a foundation. Except nothing is going sink here! You just won't reap the true benefits of cams, as you still have them strangled.

287HP

Do not worry, the car will be breathing much better soon. I just have to save up some more money. Cams + the install, is pretty damn expensive. The borla TD is also on the car.

sschmuve

iTrader: (1)

How much better would the numbers be if you dynoed in 5th instead of 4th?

287HP

I think its only a slight hp difference, 1-2 rwhp from 4th to 5th gear.

PhoenixINX

The lower the gear, the better the number you would yield.

We dyno'd in both gears - showed zero difference.

Jeff@Performance

If you do nothing else, get a set of RT high flow cat's. Cammed cars have been showing minimal gains on the dyno till you swap them out. I don't have the dyno sheet in front of me but it was over 10 hp since the car couldn't breathe.

koolzero

iTrader: (14)

Jeff,

Will the high flow cats work with the nismo exhaust? To me it looks like they're made for a true dual exhaust.

FLY BY Z

Cams do have to break in and this is where you don't idle too long or drive the same speed too long so the cams don't wear into a particular RPM. The do not redline rule is for the bottom end. The RPM variation is for the top end. Vary your RPMs for a while.

mcduck

as has been posted here before and experienced by me first hand, the Nismo Cams (and I presume others) absolutely require a mild timing advance.

Without it, you will notice the car runs very rough at idle and will struggle to not stall. With the advance, it will be much happier. I noticed a slight improvement in performance after the advance as opposed to before. Not so much that my butt dyno told me I was going faster, but I could see/hear that the engine was revving faster than before the timing change.

Get your timing set and re-run the dynos... I bet you see a few more hp without making any further changes.

Sosa

iTrader: (1)

Why is the baseline just a number, and then the 249 hp SAE?

Mean Gene

287 - Which Nismo cams R U running - the 264's or the 268's? Thanks!

287HP

The nismo cams have only one duration( 262). The tomei's have the 264 & 268 duration.

287HP

You are absolutely right. The car wants to stall so bad everytime I bring it to a stop. I'm currently having a hell of a time finding a dealer who will do the timing advance and idle adjustments for under an hours labor. I know that I'll pull better numbers once the adjustments are done.

287HP

The 233 baseline is also SAE corrected.