Should i wait or what?
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Joined: Jul 2005
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From: formerly versionJDM
i was pm'd and told to shed some light on this topic.
here is my dyno...
Click here to see Video
227.4/146.9. my mods are KN drop in/vafc tuned/custome 70mm headerback. thats it. i know this is the FI forum, but some of you may not know know how to tune a NA setup at all. the two area the MAKE THE MOST power on a NA setup are EXHAUST and TUNING. the intake/header are very well designed but the factory exhaust can yeld some power. here is the power-progression of my car.
car baselined at 197rwhp..
stock with spoon n1 exhaust(27,347 miles)
213rwhp
221rwhp 141rwtq with spoon n1/kn filter/berk tp/vafc tune
so yes i picked up 7RWHP/3RWTQ with just 70mm exhaust.
oh and just for shits and giggles last time at the track i ran the #'s in my sig....13.58@105.2
just a little NA info for ya.
p.s
this reply is not in anyway typed in a sarcastic nature just shedding some light on some common NA misconceptions. :thumbsup:
here is my dyno...
Click here to see Video227.4/146.9. my mods are KN drop in/vafc tuned/custome 70mm headerback. thats it. i know this is the FI forum, but some of you may not know know how to tune a NA setup at all. the two area the MAKE THE MOST power on a NA setup are EXHAUST and TUNING. the intake/header are very well designed but the factory exhaust can yeld some power. here is the power-progression of my car.
car baselined at 197rwhp..
stock with spoon n1 exhaust(27,347 miles)
213rwhp
221rwhp 141rwtq with spoon n1/kn filter/berk tp/vafc tune
so yes i picked up 7RWHP/3RWTQ with just 70mm exhaust.
oh and just for shits and giggles last time at the track i ran the #'s in my sig....13.58@105.2
just a little NA info for ya.
p.s
this reply is not in anyway typed in a sarcastic nature just shedding some light on some common NA misconceptions. :thumbsup:
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Joined: Feb 2004
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From: Dry Branch
Originally Posted by dfneva,Oct 14 2006, 02:21 PM
I've seen some pretty goofy looking dyno graphs posted in the JDM forums. Why is it that valid dynos are so abundant in the FI forums and that anyone would be hardpressed to find a dyno graph that was done under controlled conditions to show the delta?
If it exists it should be posted in this thread soon, becaue the claims have been made, and now somebody needs to step up to the plate and back up their claims with something stronger than more unsupported claims. (Please note that I am not saying a substantial amount of support doesn't exist, I'm just saying that claiming that it exists hardly proves anything.)
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From: formerly versionJDM
^^^you've caught me with my pants down here i guess you could say. 
but on a NA setup as you know 7 to the wheels is a good gain at peak. the one dyno i am missing is my baseline to spoon exhaust(197-213) which of course show the big gains with just a single exhaust.
but on a NA setup as you know 7 to the wheels is a good gain at peak. the one dyno i am missing is my baseline to spoon exhaust(197-213) which of course show the big gains with just a single exhaust.
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From: Dry Branch
WHOA!!! 
Is THIS the chart you're saying shows a gain with just an exhaust system change. vvv
According to the notes on the chart, the power and torque differences shown came from having the hood open during the run. Am I missing something? (Probably, but I'm missing it, so you need to point it out to me - sorry.)
Is THIS the chart you're saying shows a gain with just an exhaust system change. vvv
Originally Posted by versionJDM,Oct 14 2006, 02:48 PM
stock with spoon n1 exhaust(27,347 miles)
213rwhp
213rwhp
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From: formerly versionJDM
my car was baslined on on this same dyno at 197. that ^ dyno shows 213rwhp. thats a 16rwhp gain. believe it or not. oh course i dont have the paper proof to show you guys the car dynoing 197, but i guess that will have to be the whole in my proof. and yes alll my dynos are done hood open to simulate at speed air flow.
and yes alll my dynos are done hood open to simulate at speed air flow.
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From: formerly versionJDM
Originally Posted by RED MX5,Oct 14 2006, 01:15 PM
I've never said that no exhaust system can increase the power a little, anymore than I'm saying that they all reduce power, but I'm sure you know what I (and some of the others) are getting at here. You have more courage than me, because I absolutely refuse to post any of my performance data; It's just too damn easy to shoot the stuff down, and too much of a PITA to get into an argument over. AEM has shown a similar gain (6-7 RWHP) with their V1 CAI, but that's still a pretty small change. Not bad for a simple intake or exhaust system change on a car like ths S2000, but still not a big increase in power.It would be cool if we could build up enough of a database to actually prove convincingly that an intake or exhaust will make a few extra ponies, but that would take many cars with the same mods, and more consistency that we'll ever see.
Even if you get NO WHP gains from a single, a single is usually lighter, and that will yield some (also small) gain in performance. In general though, to see any real gains NA you've got to do some tuning, and that requires skills that most (or at least many) of us don't have.
