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So I bought the Weapon R Secret Weapon Intake...

1 reading
8.3K views 22 replies 18 participants last post by  Westrock  
#1 ·
I admit I was a little turned off by the cheesey name of this "secret weapon" as well as the Weapon R product ads. However, after receiving the product and installing it, I'm starting to think this may be the hidden gem of intakes.

After consulting with another owner, I decided to pull the trigger. Keep in mind I'm running the rich Katana 06 tune but with a 3.1" pulley. I will be watching A/F closely.

The package arrived in perfect condition and the intake itself is made well. The only thing I did was file down some rough metal edges on the underside of the MAF hole on the intake tube. The hardest part of the install was mounting the heat shielding that comes with the intake. It's a tight fit, but then again...probably not needed anyway since the filter resides near the driver side air scoop.

I did notice improved throttle response and the s/c whine REALLY screams now. There is no doubt that the car pulls harder and seems to breathe much better. I'm now thinking that the 3.1" pulley was just too much for the stock airbox.

I've had it on since last Wed. and the car is running perfect....VERY fast and no CEL. A/F ratios start in the 13's and drop to 12's by 4 or 5k , then into 11's after 7k RPM...I will be logging more and when I do I'll post the results.

I did notice that the ECU took a few days to re-learn, and it seems to be done now. Overall I am very happy and convinced it was an important key to my S/C setup. I am hoping that the final piece I'm missing is the ForcedFed 4-1 headers.

Those of you who are on the fence, this is a report from the other side. Your results may vary, but keep in mind this intake has the exact same diameter as the stock tubing and the MAF is in the right spot. I also prefer the foam filter over the K&N type. IMO, I dont think you can go wrong this this one, but those of you with FI should keep an eye on the A/F to make sure its a good fit for your tune, although my A/F numbers are almost identical.


Good luck and be safe....:shift:
 
#5 ·
Yes, thanks for the info!

As an update, things couldnt be better. Car is running strong, A/F's are in check, and no CEL. The supercharger sound is MUCH louder with this intake.

My friend drove my car today and hit the rev limiter in 2nd...he said it pulls so fast you have to really pay attention or you'll miss it and hit the limiter....I agree, I have noticed that the upper RPM range REALLY flys by now...my engine can breathe!! Now for some headers...

Great little intake, highly recommended.
 
#7 ·
Is this the intake that is supposed to be paired with the weapon-R headers?
 
#11 ·
It depends on whats going on, if the MAF is in the same place, the airflow is the same, the idle vane is there, and a bunch of other stuff it'll keep the ecu in the same place, so theres nothing to unlearn.

The problem is when the airflow is changed, the MAF signal is no longer correct, thats what causes the 'learning' issue, however if you change the amount of air going into the engine, you will change the AF mix, most widebands are too slow to accurately see the problems, as are most dynos.
 
#12 ·
It depends on whats going on, if the MAF is in the same place, the airflow is the same, the idle vane is there, and a bunch of other stuff it'll keep the ecu in the same place, so theres nothing to unlearn...
Jesus Christ, Charlie.... :huh: you pulled the rug out from under me when I was trying to tell Tim Mullen the same thing in another thread!
 
#13 ·
My buddy is the owner of weapon R. DOn't think he's tested this on an S. I have an S40 coming in june and will ask him about this. Don't really like the idea of being a mule though... Another friend of mine (champion car ZIC lotus challenge), has weapon R intake and headers in his 05 exige NA, no problems at all. Larini muffler, no ECU tune.
 
#14 · (Edited)
Politically Incorrect




I had the Weapon-R Race Header (d-cat), Weapon-R Race Intake and Sector 111 Larini SE Exhaust installed about 2 months ago and have been pleased with it all. The combination screams and is superior over the stock. I luv rattling all of my neighbors windows as I drive by...hehe.

Overall, I shaved off a few pounds from the vehicle with this upgrade and improved both the exhaust note and response time.

I would recommend it to those who are considering it.
 
#17 ·
I am putting on my Flame suit in advance but, Lose the block off plate and let the engine breath - Heat will zap power and any reduction of airflow to the engine bay (Block off plate) is not needed as the filter is already in the airflow path.
 
#23 ·
I'm thinking of using Their 4-2-1 header on my 08 Exige S240 . They say it's only for the Elise but I can't figure out why. Any ideas
I had it on my Exige for a while. About a year I think. The only problem I had was that the 1/2 tack welds on the little Weapon R plaque broke. Of course that was no functional consequence. The welds on the runners looked fine when I took it off.

The only reason I really got rid of it was due to the lack of catalyst. And the design doesn't allow you to add one afterwards, at least not easily.
 
#22 ·
The HKS SRS intake is also a good intake choice, it is included in one of the Sector111 supercharger kits. Great supercharger sound when you are on the pedal. There is no question when the bypass valve is open or closed.