the Official "NA Tuning" thread
Joined: May 2004
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From: DFW, TX
Originally Posted by kayvan_pour,Nov 16 2005, 10:15 AM
This is a good topic. We just had a dyno day in the Bay Area last saturday, due to some issues the dyno was coming in at about 5-7% lower than it should have been so all our numbers are kind of low. But the shop owner is a great guy and is re-dyno'ing 30+ cars for free so I will be back there on friday morning. Since then I have added a VAFC which seems to be helping allot. I also have the mods that are in my sig (the mugen cooling mods are sitting in my car and haven't been installed yet though) so I'm pretty excited to see what kind of numbers I'm putting down. If you guys would like I will let you know the moment I get back from the dyno. You guys can pm about the results as I will likely forget to post them in this forum.
On a side note, max power and torque are great. But you guys need to be looking on whats going on before and after the max power is made. For those who have dyno'd before you guys know how bad the horsepower drop is after peek at 8k rpm. I mean it drops by about 20 hp. And the mid range is very important also. Thats why (especially for the 00' and 01' models) a VAFC can help so much because we run too rich in some parts of the power band. I'm hoping to increase my peak power with vafc by maybe 10-15 hose power. But I have seen it on this web site and in person that people will make 10 hp more with a vafc but at certain points in the rpm band like form 4-6k rpm and from 8.1-9k rpm that they can pick up almost 20-25 horsepower. Thats what will really shine when racing the car... Just a thought
On a side note, max power and torque are great. But you guys need to be looking on whats going on before and after the max power is made. For those who have dyno'd before you guys know how bad the horsepower drop is after peek at 8k rpm. I mean it drops by about 20 hp. And the mid range is very important also. Thats why (especially for the 00' and 01' models) a VAFC can help so much because we run too rich in some parts of the power band. I'm hoping to increase my peak power with vafc by maybe 10-15 hose power. But I have seen it on this web site and in person that people will make 10 hp more with a vafc but at certain points in the rpm band like form 4-6k rpm and from 8.1-9k rpm that they can pick up almost 20-25 horsepower. Thats what will really shine when racing the car... Just a thought
230 while a "peak" number also indicates a lot more area under the curve when talking about N/A numbers for our S2k's typically. Also, don't know if anybody else has thought about this, I have for quite some time now.
200whp * 1.2 = 240bhp THE AVERAGE stock AP1
230whp * 1.2 = 276bhp The long time JDM "limit"
1.2 indicates approx 20% drivetrain loss
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From: Walnut/Diamond Bar
get the j's 70mm header back exhaust j's spl header, tuning and gears...done
i got the j's 60rs, test pipe, 4.56 gears. j's header and supercharger on the way...them im done
and then project Type R after that...
-Mike Kim
i got the j's 60rs, test pipe, 4.56 gears. j's header and supercharger on the way...them im done
and then project Type R after that...
-Mike Kim
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Joined: Jul 2005
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From: formerly versionJDM
so how much is....j's ecu.....j's header? also what do you guys(who know what your talking about) think my car would make with those said mods and my spoon N1? hell what are your thought about the spoon N1. i love mine, great sound, sublte look. 4.37rwhp gain! loss of rwtq though...bummer.
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From: Walnut/Diamond Bar
u can get the j's header at evasivemotorsports.com (cheapest place ive seen the header, i ONLY buy parts from them) about 1260 or so at evasive...they get them in stock in a couple of weeks.
id say go with the j's exhaust either the 60rs like me or the 70RR if ur hardcore.
reason being-j's header has the biggest flanges/collector out there...65mm collector, if u match that up with the 70mm j's exhaust its about 2.75'(which is huge) tubing all the way thru and its almost all straight tubing.
even without the ecu you'd make some good power.
my car has no tuning i havent gotten to dyno yet(after the header i will)but its a lot quicker than my girlfriends stock s2000. Ive got the j's catback straight pipe and ARC intake
not to mention the j's exhaust weighs only 9lbs because it is titanium. Stock dual exhaust were HEAVY about 80lbs or so.
-Mike Kim
id say go with the j's exhaust either the 60rs like me or the 70RR if ur hardcore.
reason being-j's header has the biggest flanges/collector out there...65mm collector, if u match that up with the 70mm j's exhaust its about 2.75'(which is huge) tubing all the way thru and its almost all straight tubing.
even without the ecu you'd make some good power.
my car has no tuning i havent gotten to dyno yet(after the header i will)but its a lot quicker than my girlfriends stock s2000. Ive got the j's catback straight pipe and ARC intake
not to mention the j's exhaust weighs only 9lbs because it is titanium. Stock dual exhaust were HEAVY about 80lbs or so.
-Mike Kim
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Joined: Aug 2003
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From: Lusby, MD
IMO, I want the best power adding (throughout the powerband) bolt ons available as I think the S2000 motor from the factory is built to the max as it is (streetable) I wish some owners would get together and do a bolt on dyno day, all the different Intakes (Mugen, J's Racing, ARC, AEM etc. etc.) Exhausts (70mm shootout, J's 70RR, Amuse R1000, T1R 70mm) and Headers (Amuse, J's Racing, Mugen, Toda, Spoon, Ricks) and see what products make power where.
I think the ideal performance set up would be AEM EMS, J's Intake, J's Header and whatever 70mm exhaust gives the most gains.
I think the ideal performance set up would be AEM EMS, J's Intake, J's Header and whatever 70mm exhaust gives the most gains.
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From: Walnut/Diamond Bar
oops i checked the prices the header is 1350 at evasive LOL!
id love to see these dyno as well...
the 70RR is damn LOUD from what i heard so i stayed away from it.
theres a sound cliip of my 60RS at evasivemotorsports.com look under j's racing exhaust sounds great.
id love to see these dyno as well...
the 70RR is damn LOUD from what i heard so i stayed away from it.
theres a sound cliip of my 60RS at evasivemotorsports.com look under j's racing exhaust sounds great.
Joined: May 2004
Posts: 3,403
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From: DFW, TX
Originally Posted by afwfjustin,Nov 16 2005, 09:21 PM
I dunno why everyone thinks the 70mm exhausts are so loud. I was prepared for absolute sonic deafening and I actually wouldn't mind it if my exhaust was louder. It's really not that bad.
(the resonator with nothing inside). Needless to say, its LOUD...no cat, no resonator, ONE straight through muffler. I'm going to love switching to a J's 70rr.anyway, back on topic...lets make 230whp!