very, very nice power !!!!

 

Very nice

Forged Performance is the place to go. Sharif and Devin do great work

 

Hi everyone. MP...glad you are happy with the tune. Unfortunately, my test drive of your car was cut short, as that police officer idling in the adjacent lot put a quick end to the open-dump-tube madness. It did sound sweet!

8psi on the eManage pressure sensor, and 9psi on the dyno pressure sensor. Trq checked in at about 435 at the peak, and then leveled out to about 415 and held very stable all the way to redline.

MP is running a full 3 inch exhuast, with dump tubes, so its not uncommon to trade a little bit of trq, for some serious top-end gains. With a more restrictive exhaust, and a slightly different tuning strategy, you can trade back some of that whp for trq. VQ35's that produce signifcantly more trq than whp, are usually suffering from excessive exhaust back pressure, too little ignition timing, or an undersized turbocharger for the boost pressure utilized. With full trq occuring at 4000rpm and very flat trq curve to redline, this car is a blast to drive, and delivers some very usable power without needlessly roasting the tires.....except in 1st and parts of 2nd.

I think your car is ready for round II at Rockingham, MP.
Here is the full dyno chart, with trq, in case anyone was interested.

 

Sharif, thanks for the explanation and dyno chart (only got a pic of the other one). Yes, Rockingham soon would be nice (though i'm not much of a drag racer and I will still be on street tires), I just need to get them axles first.

I love the way the car drives. It already gets very little traction with 295's in 1st and when you hit 2nd, so more torque down low isn't necessary and I enjoy the topend pull trade-off

 

Awesome numbers. Now that Sharif is closer, it would be awesome to check out the shop. I am so glad the Z community has a bunch of excellent tuners and workmanship. Thanks to you guys.


My only question is to fellow forum-ers about the dyno pulls. Why not bash the pulls done here just like the pulls done in this thread?? https://my350z.com/forum/showthread.php?t=204239

Same place right?? Please don't bash me I am just putting a point out there. (runs and ducks for cover)

 

Here is what I just posted on that thread. Don't worry, you arent stirring up anything. We will no longer use any additional correction on our dyno. From now on, the DD numbers will be pure DD numbers, with just the standard atmospheric correction that is applied to all dynos.

Posted on the other thread:
Hi everyone, the first thing suprised me about Keith's engine, was the perfect smoothless and flat trq curve with the factory ECU. I have never seen such a perfect power and trq curve out of the factory ECU. Repeated passes were identical. I'd call that unusual (in a good way) for a factory ECU tune.

Second, Dyno Dynamics claims their dynos read 13% lower than a DynoJet. We add only 11% to the numbers to simulate a DJ number, so the numbers should be close to a dynojet.

Lastly, there is so much heated debate on dyno numbers, that we are inclined to remove all additional correction, and let the customer/seat of the pants speak for itself. The dyno debate consumes way too much of everyone's time. As Alberto mentioned, a dyno is a tuning and measurement tool. Consistency, is the name of the game. To me, the numbers mean very little.

Hats off to Nissan though.....this is an absolutely perfect factory ECU tune.

Once final comment in regards to MP's dyno. 435-415ft/lbs of trq is perfectly normal...I dont think anyone would debate that number is excessively high. Dyno's measure trq, not whp....so I dont see anything unusuall with these numbers.

 

I posted my thoughts on dyno numbers in general in the post above. I didnt bring it here because unfortunately most FI guys get caught up in dyno numbers more than NA guys. Its almost unfair to say "hey Sharif or OP your full of BS" They are not, they put a car on a dyno, get a baseline (hopefully) and then get a final number, if there is an improvement Sharif did his job, why argue that the OP may be lower on a dynojet? People will think what they want about their own cars-they arent fooling me. What would make me unhappy is if there is a "correction" already applied to those numbers, in that case Id ask for the true numbers. So many variables between dyno's to really look at numbers that close you know?

EDIT-just read Sharif's post, thanks Sharif for not using the "correction" anymore

 

You are right, Alberto. The LAST thing I want is for someone to even FEEL they are getting a higher number that they are actually making. And to avoid any chance of that happening, since we are basically guessing at the dynojet numbers.....there will be no more correction applied on my dyno....period.

Just prior to MP's car, we had a TN car come in from a UTEC retune. Baseline number was 353whp, and post tune number was 403whp. To say he was pleased, and that his car was transformed, is an understatement.

 

I knew about the 11% before putting it on the dyno, and knew about the correction last time at CP. The thing that amazed me most is that I put down 424rwhp on CP's corrected dyno before (which would be roughly 375rwhp uncorrected) and now my uncorrected DD numbers would be 434rwhp. So granted...its alot fast and alot better. I just hope dynojet gets phased out eventually and DD takes over. Its so much better for tuning.

 

Thanks MP. DD's are popping up all over the country, so its just a matter of time, before tuning shops start replacing their old DJ's with DD's.

 

I agree everyone has an assumption of the percentages between different dynos, we gave up on that and just worry about the tune, as long as the dyno shows a difference between first and last run and specially if the customer comes back after a spin around the block with a big smile the job is done. We tell them that if they want bragging numbers to show their buddies, to take it to a dynojet preferrably one they have used in the past.

 

Awesome to hear Sharif-we should sticky this for all the pole smokers who get caught up in dyno numbers anyway-good info in this thread for newbs...

 

I don't disagree that the dyno is a tuning machine and used to measure between a baseline and later after mods, tuning, etc. But without some relationship to a stock model with the numbers, it really only will show that some improvement over the way the car came in - which in reality, could be well below a stock car,as in mods, previous tune, lack of maint, etc, could cause a loss of hp. So to help me better understand these numbers from the DD, what does a bone stock 287 hp Z do for peak hp and tq on this machine? Have you run a bone stock revup and non revup on this dyno yet? Those numbers and charts would at least give a baseline of some kind to judge against, for me, anyway.

I agree that these numbers as in bragging rights are pure hoohey. I have seen the gross differences between dynos in my own limited experience to know that. But knowing what a base model puts down on the same machine would be quite useful in my opinion. When I dynoed in Cincinatti they had dyno sheets on the wall from base models of the Z etc to compare to, that had been run on that machine. While not perfect, it gives some basis.

 

Well not to start a dyno discussion on this thread but that wont help you either, we have seen bone stock Z's dyno up to 20 hp apart

 

wow thats power

 

Correct again! During dyno days, its not uncommon to see some Z's dyno 220whp and other stock Z's putting down 240whp. Things like tire pressure, wheels, contact patch size, etc..etc...can all make differences in power production.

I'll get a stock VQ35 (probably an auto..since I have access to two of them right now), and that will at least give everyone an idea of a bone stock auto Z on our dyno...no correction. I'll try to get it posted later today.

 

Sharif, you continue to astound me with your logic and professionalism. Keep up the good work. Looks like your reputation is well deserved.

 

looking good. enjoy the new power!

Sam from GTM will be re-tuning my FCON this Friday at Sharif's shop. I can't wait!

 

Hey Shariff,

When I come up on Friday I'll take two dyno print outs.....Uncorrected and corrrected with an 11% add on. When I get back to Miami I'll hit a local dyno jet. Unlike the countless of times others have said they would do this, I promise to do so and will post up the results.

 

I plan on doing this as well. There is a dyno day here in NC this weekend that I was thinking about, but I think I am going to do an Auto-X instead. But I still plan on getting DJ numbers.