JKweezy

Hey guys. So just got my headers installed. I had the ticking noise @ cold start but went away after warmed up. Installer said it was an exhaust leak at the manifold so a new gasket fixed it up. I was thinking it was the cracked headers that most 08's have been plagued with. Took one for the team and paid for a dyno (donations welcomed... haha).

Background to the dyno: I have an 08 w/ about 128k miles w/ RRRacing Tuned Intake (therefore their tune also), their carbon intake elbow, and their AOS (I installed all of these about last week). I still have the stock exhaust (not planning on getting an aftermarket but the mod bug may still be biting). So the baseline figure is with these mods. Enjoy. Numbers are low on this dyno but it's all about the delta.

Tip: Install headers before installing the tuned intake. I forget if it's required to remove the intake area but all my thermal tape was ripped up so i assumed they removed the intake box... Luckily i still had thermal tape left over to redo it all... again...

Aftermath: It definitely pulls hard on the highway at half throttle. I haven't full throttled as my RE-11 are about done. Next mod is new tires soon. TCS would kick in from dig all throughout 2nd gear. It is a bit louder but not obnoxious. The tuned intake before the header install was louder already. All in all, it sounds amazing when you get on the throttle.

semnosNSX

Very nice! I already had PPE headers installed, but last week I installed the tuned intake with the tune and couldn't be happier!

tas02

iTrader: (2)

A true dual exhaust system will let your other modifications work to full effect. Systems are available which include high flow cats and/or dual modes if desired.

cvt

wow, that looks impressive. why does the baseline dyno stop at just under 6500 rpm and your new one keeps going to 7000 rpm? Whats usually the acceptable a/f ratio for our cars?

Rossi

iTrader: (4)

With adding headers, don't you need a new tune for that setup?
How is the life with the headers inside the car? I am planning the V2 header with stock exhaust.
Wondering about the cabin noise. No intake upgrade for me.

tas02

iTrader: (2)

^^^^^^
There's only one tune, no others are available (unless you're going custom).

And that tune was created to maximize performance with a header and aftermarket exhaust.

msgs350

iTrader: (2)

I went this route initially and my advice is to not bother with just headers. Yes, you will notice the small gain and additional sound inside the car but its not work the $3k cost of headers and install.

Joker4096

iTrader: (2)

Great gains, I love it.

Rossi

iTrader: (4)

I was under the impression that there is a specific tune for each setup, RRR intake, larger throttle body, headers.
I thought if you tune a stock car, you need to get new files for your handheld tuner to accommodate the headers. Am I wrong?

My plan is to go with V2 headers and RRR tune. I have HPS intake tube. Stock exhaust with secondary cats to avoid the loudness and smell.

liquidtek

There are only two tunes beside the one for the supercharger that RR offers. Basically the tune covers stock all the way up to intake, headers, exhaust and every combo in between. The next tune up covers their tuned intake for full bolt on applications.

msgs350

iTrader: (2)

let me be more detailed..I had the PPE headers, RR Tune and JoeZ intake tube and AFE filter and didn't think it was worth what it cost. Only after I added the Borla, with hi flow cats did the car improved greatly (410 HP on a DynoDynamics dyno). There isn't a tune that I'm aware of for each "phase" of adding a bolt on, your ecu will adjust accordingly. The only time you will need a updated tune file is when you add the RR Tuned intake, which I've since added reccent .... or if you S/C your car.
My opinion is to go full bolt on or just get an exhaust and be done.

isfvss

Unless someone has come up with better tuning tables that can be adjusted on the dyno ( a bit like when LS1 tunes were in there infancy ) you only have to look at what can be done with a LS1 now. If you can CAM this motor and tune maybe some big HP might come without FI.I would love to know where my tune came from over here in OZ and yes a 60rwhp gain over 3500 rpm the seat of the pants and tyres tell me this is correct. enjoy.

JKweezy

coasting/keeping the throttle constant sounds normal like stock... it only gets louder if you accelerate...

i'm not very familiar with dynos but now that you mention it, i'm curious too but maybe since max hp was achieved at 6140 rpm and max torque was achieved at 5030 rpm...

SikkyMFG

Looking good JKweezy! Solid gains from our headers I see. Looks like 50 hp and almost 39 ft lbs of torque! Very consistent with what we have seen. Glad other people are finally starting to see the light on the DELTA aspect of dyno plots and not focus on the number!

Jz39

iTrader: (2)

Those are just awesome numbers.
Do you have cats on?

Imagine if (when) you get an exhaust!

Once I go out of extended warranty I can guarantee I will not be able to resist these numbers. Going from a 12.8 car to an 11.8 car (or thereabouts) is almost like getting a new car. That is a huge and noticeable improvement over stock.