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  #13  
Old 03-29-2016, 09:29 PM
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Re: K&N Cold Air Intake (Dyno results)

A decent write up below on Dynojet and Mustang dynos. My Jeep was tested on a Mustang dyno.
http://imageftp.dynojet.com/CMD/Trut...Runs_Final.pdf

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  #14  
Old 04-04-2016, 09:26 PM
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Quote:
Originally Posted by Michael Plummer View Post
Q) Thanks for taking the time to do the dyno tests.
A) You're welcome.

Q) One thing I am curious about and this is by no means to claim that your results are not accurate, but do the computers in vehicle take a little time to adjust?
A) Great question but the processor has to deal with the hand it was dealt. It has short and long term fuel trims where it can adjust in either direction (more or less fuel). We need 4 things to make an engine run: Air, fuel, spark and compression. If we add something that increases air flow, the engine has to compensate with the extra airflow by increasing fuel. It has no way of getting rid of more airflow other than thru the combustion chamber. The stk. processor has limits and when it hits a limit, it will give you a "Check Engine" light. This is when a tune is needed. Parameters will need to be changed and sometimes other parts depending on what modifications you make.

Q) In other words, had he put the K&N intake system in, driven a week or two and re-did the dyno would the results be the same? or would the computer have adjusted or compensated for anything?
A) Great question, and I did just that. I went back to the dyno on Saturday and made 300rwhp and 328rwtq. That's 4rwhp and 2rwtq gains over the last dyno session 5 days ago. We have to consider dyno error or maybe a better word be percent of error and ambient temperatures might of been cooler.

Q) I always thought changing something on the spot like that then immediately dynoing it might not be fully accurate.
A) The Mustang dyno is not 100% repeatable due to a number of variables but results should be close. You're not going to see a HP increase from a part on one day and then see a HP decrease a week later. If anything, your HP increase may be slightly more or slightly less depending on certain variables. This is providing you don't have engine knock or some other variable that may reduce total timing.

A good example of a bolt-on part that will not work, is if you hand a hand-held tuner and you uploaded a 93 octane tune and you saw no HP gains. It could be related to the (2) knock sensors the HEMI engines have. If the knock sensors detect knock it will retard total timing depending on how bad the knock/detonation is. And your dyno results will show little or no HP gain.

Thanks
Michael Plummer
Slightly off topic here, but have you considered running an srt8 jeep variable intake manifold? My thoughts are that you will see huge gains from that more then anything without digging into the engine..With a proper tune that should make more then then the 390hp ram (intake manifold and tune are only real difference afaik) and possibly put you over the 400hp measured at crankshaft since the srt version should flow even better..Intake manny, gaskets, and fuel rails should be all that is required...

I will do some more digging..
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Old 04-05-2016, 11:27 PM
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Thumbs up Re: K&N Cold Air Intake (Dyno results)

Really appreciate the write up and video showing real world gains in HP and Torque. Again thanks.
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Old 04-06-2016, 12:19 AM
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Re: K&N Cold Air Intake (Dyno results)

Quote:
Originally Posted by Michael Plummer View Post
Thank you for the kind words. Normally, I don't deal with small bolt-ons but I decided with this Jeep, I was going to experiment a little. And I'm with you, I had my doubts too and the best way for me to verify is with a dyno. Granted, my testing isn't on any level close to what the OEM may do but I tried.

Like I mentioned in the video, is it worth the $272 price tag? That's for the owner to decide but the performance gains are small but the installation can be completed by anyone in 15 minutes. Next up, a hand-held tuner from Diablosport.

Thanks again
Michael Plummer
Please keep us posted with your Diablosport results. Thanks for all the great info
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  #17  
Old 04-06-2016, 09:28 PM
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Re: K&N Cold Air Intake (Dyno results)

Quote:
Originally Posted by Pinch View Post
Please keep us posted with your Diablosport results. Thanks for all the great info
I have results from the Diablosport tuner but I haven't had time to put up the video as of yet. Hopefully, sometime this weekend.

Thanks
Michael Plummer
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Old 04-13-2016, 08:43 PM
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Re: K&N Cold Air Intake (Dyno results)

Have you made the tuner video yet?
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