Bob K
Enthusiast
I am considering ordering the K&N intake system for my SRTC. Has anyone proven with dyno numbers that it is worth while? Has there been a thread on this already?
Bob K
Bob K
K&N intake - is it better than stock?
- Thread starter Bob K
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twinturbo3150
Enthusiast
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already been a thread, I went with the S&b's from Roe, you couldnt tell the difference if the S&B's came in the K&n package. Pluse saved over 100 bucks. I called Roe and they dynoed the k&n and s&b and there was a 1 to 2 hp difference. Not worth spending the extra dough on . my 02
JimmyCrackcorn
Enthusiast
I say go for it. You can notice a difference without question. It isnt a HP gain necessesarily, but the car runs cleaner and crisper, especially when its cool, like late at night, you can really feel it. It takes the computer a few miles to readjust to the air intake difference, like 50-100 miles, then it opens up.
Bob K, I have the dyno sheets from K&N's R&D department when they did a baseline before and after they installed kit and then ran on the dyno trying the hole drilling modifications everyone was discussing last year. I would be willing to discuss these with you. I dont want to create a discussion here and deal with "their dyno, their control, therefore test was biased".
Seriously, I let a good friend, more like a second son, who works at K&N in their R&D use my car at around 700 miles to collect data for them before it went to get the Paxton installed. PM only on this subject from this point forward. Possibly set up a telephone call. I DO NOT want these published on this or any forum. Too many air flow experts, conspiracy theorists and butt dyno specialists.
Larry
Chuck 98 RT/10
Enthusiast
After glancing at the stock system I can't imagine it could be improved upon by much.
Andrew/USPWR
Enthusiast
I had K&N in my GTS and bought a second pair. To switch out during cleaning. Not worth it IMO
Keep stock and toss it out for a new one every other oil change.
Keep stock and toss it out for a new one every other oil change.
JimmyCrackcorn
Enthusiast
It is slower and sluggish at first, the computer needs to relearn the new air-fuel ratios, then it opens up propery.
Harsh reviews here!
Lots of threads on this. It has fallen out of favor lately. Mostly due to some quality control issues. Personally, the (S)eat(O)of(T)he(P)ants(F)eel - otherwise known as "Butt Dyno" returned improved results for me. My first gear WOT seemed to cause wheel spin easier on my favorite well traveled roadways. But many have reported immediate reduced power and feel.
I am getting ready to see my own real results in a couple of weeks when I return for my annual (same) dyno run.
Lots of threads on this. It has fallen out of favor lately. Mostly due to some quality control issues. Personally, the (S)eat(O)of(T)he(P)ants(F)eel - otherwise known as "Butt Dyno" returned improved results for me. My first gear WOT seemed to cause wheel spin easier on my favorite well traveled roadways. But many have reported immediate reduced power and feel.
I am getting ready to see my own real results in a couple of weeks when I return for my annual (same) dyno run.
I had positive results as well, after the PCV amd idle hole sizes were fixed. It was a 5-10 hp benefit, not easy to verify on a dyno or seat of the pants. Only reason I removed it was to "push" the air into my engine instead of sucking 
Bob -
Congrats on the coupe.
I believe the K&Ns add about 10-12 rwhp. When I first installed mine on my roadster, I actually lost horsepower because one of the holes was not as large as the stock one.
Once I drilled it out, I noticed faster response and easier wheel spin.
I have not had it on a dyno yet.
j
Congrats on the coupe.
I believe the K&Ns add about 10-12 rwhp. When I first installed mine on my roadster, I actually lost horsepower because one of the holes was not as large as the stock one.
Once I drilled it out, I noticed faster response and easier wheel spin.
I have not had it on a dyno yet.
j
Bob K
Enthusiast
Thanks for all of the feedback. Just so you know, I am talking about the entire SRT K&N system which includes the tubing as well as the filters and sells for around $300. What I am looking for are before and after dyno numbers on this system for the SRT. I may put it on along with the race exhaust and REC before repeating the dyno but then I won't have any idea which of the mods added how much horse power. That's not a big deal except that I am sort of a scientist and would like to have an idea of what did what to the numbers.
Bob K
Bob K
tmcphail
Enthusiast
I gained a peak of 10 RWHP with the KN setup doing back to back runs against stock on my dyno.
wormdoggy
Enthusiast
I believe he is making reference to the ventilation holes. Should be 1/2 inch. BUT...........this problem has been resolved with the latest shipments. Just need to check and make certain.
Patrick
- Joined
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The new K & N system worked for me. I did have to drill out both holes and it took 6 or 7 starts and some miles to notice the improvement, but it is real. Expect 10 - 12 rwhp gain after break in.
Just got my dyno results.
03/31/05 - Car had been streeted pretty hard for 1 year/7000 miles. Totally stock, including paper filters.
SAE Horsepower = 452.7 using external fan.
04/05/06 - Car has been streeted harder for another 4000 miles, plus three full road course track days. K&N filter kit + tube was installed just after the initial dyno, so it has 1 year/4000 miles of accumulated dirt.
SAE Horsepower = 448.9 not using external fan.
SAE Horsepower = 459.4 using external fan.
Apples to apples, the Kit added power (~7hp), posibly more if I had cleaned the filters before dyno'ing. I also now realize how much different dyno results can be by using a cooling fan while testing (~10hp).
Racer Robbie
Enthusiast
The K & N is a very good piece as long as it is modified and fitted with Green Filters. it also has to be sealed. See my web site for more imformation.
robbie
http://www.members.aol.com/AtroRacingTeam/PRODUCTS/AtRoRacingsProductCatalog
robbie
http://www.members.aol.com/AtroRacingTeam/PRODUCTS/AtRoRacingsProductCatalog
SweetRed04
Viper Owner
A commercial dyno can not detect or establish a statitically sound 1-2 HP gain. Between run to run engine and dyno variation 10 HP is difficult to detect as well. It would seem to be a questionable mod at best based on the reponses most of those who bought them.
tmcphail
Enthusiast
I disagree with that. I spend my life building HP wide band dyno tuning Ford's so I know quite a bit about this.
Obviously datalogging all sensors to keep as much consistency as one can you do the following :
Initial pull
Make the part change and pull it again
Remove X part and pull it again
** note doing all of this and keeping temps on all fronts as close to each other pull as possible.
When you see the initial and 3rd graph relevant to each other and the one in the middle gain or decline that’s conclusive in my mind.
I witnessed this first hand on my viper making pulls back to back with the stock intake and with the K&N CAI
Obviously datalogging all sensors to keep as much consistency as one can you do the following :
Initial pull
Make the part change and pull it again
Remove X part and pull it again
** note doing all of this and keeping temps on all fronts as close to each other pull as possible.
When you see the initial and 3rd graph relevant to each other and the one in the middle gain or decline that’s conclusive in my mind.
I witnessed this first hand on my viper making pulls back to back with the stock intake and with the K&N CAI
Racer Robbie
Enthusiast
You can not run dyno tests on a ram air k & n system as you need to have running at highway speeds to see the true results. The fact is if you run a modified K & N system like we produce you will see huge results. If you do not believe me then email YELLOH at [email protected] and ask Rick about the system that I modified for his viper. You can look at this system at http://www.members.aol.com/AtroRacingTeam/PRODUCTS/SRT-10ViperSealedColdAirBoxKit
tmcphail
Enthusiast
Yes you can. If you are stating that the actual results at 100mph will produce higher gains then sitting still on a dyno then I agree with that.
Racer Robbie
Enthusiast
I am stating at 80 MPH which is a reasonable speed on the highways today. Sounds like we are on the same page. My viper with all the mods that are on my web site can break the tires loose when I floor it at 80 MPH in 4th gear. The proof is in driving my car and all potential customers are welcome to drive my viper to see the difference between mine and theirs before plunking down their hard earned money. Does any other speed shop do this before taking your money?
Hey Atro, first I agree with your conclusions. Secondly, I really appreciate the offer to drive your Viper so I can actually see the difference. Third, I don't know of any speed shop making a similar offer.
Lastly, do you send the car or round trip first class airline tickets? PM me and I will give you my address.
I don't know the proper post abbreviation if there is one, but...laughing with you not at!
Larry
Lastly, do you send the car or round trip first class airline tickets? PM me and I will give you my address.
I don't know the proper post abbreviation if there is one, but...laughing with you not at!
Larry
Racer Robbie
Enthusiast
No, you need to come to me as I believe that offering my car to potential customers to drive is enough and the right thing to do. Like I said before get ahold of Yelloh if you do not believe me.
tmcphail
Enthusiast
Yes then we agree. As for any other speed shop doing that sort of thing hell I have been doing that for years in the Ford community. God knows how many potential customers vehicles I have reflashed and let the customer test drive it. Either they are going to completely love my tuning ability or I can set their vehicle back to stock and they can go on their way. My skill sells itself.
