GRP Intake Shootout Dyno Testing!

[Dragoon]

When you're full throttle and shifting quickly the intake makes a clear sharp chirping kind of sound. It's great and not there with the OEM filter.

There are a lot more intake sounds that you can bring out depending on how you use the throttle. It adds another dimension to the drive.

 

[David s]

There are a lot more intake sounds that you can bring out depending on how you use the throttle. It adds another dimension to the drive.

Does it fell like the performance has improved?

 

[Dragoon]

Does it fell like the performance has improved?

I will need to drive it more to find out. The new sounds are intoxicating enough to distract me from the performance feel.

 

[MTV]

OK this was totally worth doing! With Aerie Titanium and third Cat delete along with Milltek valve controller and the car sounds like it always should have.!

 

[MiamiBlue]

Does it fell like the performance has improved?

You're never going to feel or measure a performance difference on the car with a +/- of 2-5Bhp on a 400bhp car.
What's the percentage error on a Dyno measurement between runs? Probably larger than these 1% change in values.

 

[Steve24]

I did six dyno runs with my car yesterday.

The difference in power measured between the lowest and highest result was 1.66%

The difference in measured torque between lowest and highest was 2.26%

Oddly the highest measured power run also had the lowest measured torque.

The fifth run was the best overall, with 283kW at the wheels (380hp) and 442Nm.

 

[MiamiBlue]

I did six dyno runs with my car yesterday.

The difference in power measured between the lowest and highest result was 1.66%

The difference in measured torque between lowest and highest was 2.26%

Oddly the highest measured power run also had the lowest measured torque.

The fifth run was the best overall, with 283kW at the wheels (380hp) and 442Nm.

Without changing any hardware?
You're seeing a larger variance on repeated runs than they measured swapping intakes..

 

[Steve24]

Correct, in terms of all runs were the same configuration.

I’ve never dynoed any of my cars before so have no previous experience, but the guys in the shop felt that the run results were very consistent.

I do, however, agree that the only way to know what the value of any mod is is to do back to back runs. The actual numbers don’t matter much.

For example, if I changed something and did another six runs and the results showed a consistent gain that would be good enough for me.

 

[David s]

I’ve just had the grp cold air, miltekexhaust and decat. What I noticed was an immediate improvement in throttle response. What I mean by that is that the car pushed effortlessly into the torque range and kept pushing hard to the max rev range. In second gear the car broke traction when accelerating through a curve in the road and needed correcting. I haven’t experienced this before. The dyno may not show much power improvement, but I’ve never put much faith in dyno figures. It’s artificial. Dynos are more useful for when you are tuning certain parameter in the ecu. In the real world, the mods produced a much more improved use of the engine, and it put it quicker into its torque/hp zone. This comes into play when you are driving into and out of curves and corners. My car pulled strongly back into the torque zone when exiting curves and corners. I’ll put it on the track in the next couple of weeks and report back. But from what I’ve experienced on the road so far, it’s a definite improvement. It now feels more like my previous car (410 exige ) in the way it performs out of the exit points of the corners or curves. The “flat spots” have now been eliminated. Well worth it.

 

[Eagle7]

The ECU learns and makes adjustments over time. When I installed the Eventuri intake, I drove the car for almost 2 weeks before getting a dyno run. I had already done a baseline run sometime before with the car completely stock, so I had something to compare to. I consistently gained 15+ hp and torque from the Eventuri, and I could most certainly feel it. I did several runs for various mods spread out over months last year, and every single run showed the gain of the Eventuri plus whatever difference the mod made (in one case no practical difference at all). I still have the 3rd cat in place too.

For anyone doing either an Eventuri or GRP intake mod, give it a week or two of driving for the ECU to adapt and adjust, then do a dyno run.