Well Im here again at Uprev getting my mildly built N/A HR.
I drove 4 hours just to get here, beside all the mods I've done to it
Like the injen CAIs, Stillen Headers, Berk TPs, and Greddy Camshafts. I alsO
Just added an Invidia Gemini True Dual exhaust and Okada Direct plasma coil packs. <---- people said they were a waste of money LOL.

Well any ways I'm at 315whp and 249wtq. Will post dyne charts ASAP.

 

There you go guys, those were the final numbers.

 

Looking good. I had my tune by uprev last year. Best mod by far.

 

I had to go a few times to get my tune right, but it is all cleaned up, I always wanted to come back when it wasn't 100+ degrees outside and see how I did.

 

beside all the mods I've done to it
Like the injen CAIs, Stillen Headers, Berk TPs, and Greddy Camshafts. I alsO
Just added an Invidia Gemini True Dual exhaust and Okada Direct plasma coil packs



lulz

 

whys your trq so low?

 

That's what I would like to know.... But car still feels great
And more powerful.

 

 

Because it's an HR

 

^^^ thats dumb.... not a bad number but cams could be a factor.

 

Was the 309 run before you put some parts on or were those just 2 runs they did in a row?
Numbers seem accurate though....nice....
You figure people are throwin down 290-295 with: CAI, cat-back and TP's. So from the headers and cams you saw 20 ISH horsepower...pretty cool.
Do you know what they did with timing and such for the new cams? Some more details on the tune itself would be sweet

Any more plans for future?

 

The TP's and dual exhaust kills your WTQ!

HFC's and a single pipe would bring those #'s up. The dual exhaust is mainly for FI or high RPM gains.

 

The 289whp was with no cams just with headers,TPs, Stillen Y, and 3" single. Then I had the nightmare happen with putting in the cams. When the nightmare passed the car put down 309whp and like 247 wtq. I did not like the tune that tuner gave me and was having trouble with my 725cc injectors (hot starts) so I took it to the pro tuner recently and bought The Gemini true dual exhaust and the expensive as hell Coilpacks and car put down 315whp and 255wtq which I pretty happy with. No more hot start problems with my 725cc injectors.

 

any evidence to your claim?? Have you tested one vs the other??

 

I beg to differ, proof:
My build thread

 

I'm not sure what to make of that exhaust. But in general, with dual exhaust & TP's you will make more WHP in the upper powerband NA. WTQ will suffer compared to HFC's with a proper sized single pipe system. There needs to be the right amount of back pressure.

The ART system has a unique TP, not to mention the X-pipe or chamber on their dual exhaust. To me it's not a true dual exhaust when you throw in a X-pipe or chamber merging the flow.

I see it all the time on the 5.6L engine. The 5.6 likes 2.25" pipes. If the Y-pipe diameter is increased, WTQ suffers greatly. Same with dual exhaust systems on the 5.6L WHP increases but wheel WTQ decreases unless the pipe diameter is kept around 2-2.25 all the way back.

There are Dyno's floating around here with Single pipe exhausts with TP's or HFC's with high WHP and WTQ #'s compared to dual systems. 3 cylinders with 2.5" pipping slows the exhaust flow to much.

I see it in my Dyno's. I could prove it, if I was willing to drive 4 hours after installing my stock exhaust with Stillen headers, crawford HFC's and having the car retuned. I would bet the WTQ would increase. WHP would suffer some. It would most likely be around 290WHP 258-264 WTQ

 

I made 269TRQ with way less mods..?

 

Pipe diameter too large disrupts the scavenging effect. Please, don't talk about back pressure.

 

exactly.... If my 06 Civic SI picked up more wtq/whp (thru whole powerband) with a full 3" exhaust NA I'm positive a HR 350z will be perfectly fine. Do not talk about back pressure lol.

 

3" diameter pipe would slow the flow!!! AKA poorly sized for a NA Z with dual pipes. Unless it's LS swapped.