NA mods-any gains with no tune - S2KI Honda S2000 Forums

Notices
S2000 Naturally Aspirated Forum Discussions about N/A motor projects, builds and technology.

NA mods-any gains with no tune

Old 12-01-2018, 03:42 PM
  #1  
Thread Starter
 
Join Date: Nov 2011
Location: Near Chicago
Posts: 1,025
Thanks: 0
Thanked 0 Times in 0 Posts
Default NA mods-any gains with no tune

I've been tracking my S2000 for a few years now mostly stock. Its a great platform and I've decided to slowly start modding it for track use. Currently it has a stock intake and exhaust with only with a test pipe added.
So among the changes I'm considering engine bolt ons. Partly for the power but mostly for the weight reduction, especially with the exhaust. I already picked up a FIPK for a good price and theres another local deal on a HKS single.
Question is, can I expect to make any power with these mods with no tune? I know any gains will not be significant and I don't expect much on the top end but what about the mid range? I've heard that you can even lose power in some cases(bad intake design) and that would be worst case scenario because I would just rather keep the stock set up in that case.
Pic for attention-My S2 in its element

Danwolski is offline  
Old 12-01-2018, 07:14 PM
  #2  
 
Join Date: Apr 2005
Location: Scottsdale, Az
Posts: 943
Thanked 52 Times in 43 Posts
Default

Not really, but if you get the Karcepts tune w/ Greddy EMU or another ECU that will extend the VTEC engagement window (along with the usual dyno tune adjustments) you're going to notice a pretty huge difference over stock.
Chibo is offline  
Old 12-02-2018, 12:41 AM
  #3  
Community Organizer
 
s2000Junky's Avatar
 
Join Date: Jun 2007
Posts: 27,671
Thanked 183 Times in 173 Posts
Default

Run a air snorkel to get some fresh cold air to that intake custom or bought, otherwise you are going to be pulling extra hot engine air from elevated track temps and probably lose some power. An open filter isn't really the best option in that location without a way to get some good fresh airflow to it once the car is moving. That said, on its own the single should give you a little more on the top end where the stock tune is richest. What id be concerned with, particularly if you are running an ap2 ecu, is the overly lean condition in the 5500-7500rpm range. When you start doing anything else beyond a TP id strongly advice investing in a wideband so you can make sure you are running not too lean. Its a good investment and will aid in future tuning tool as well. More accurate then a dyno tail sniffer and pays for itself after one typical dyno test.

Last edited by s2000Junky; 12-02-2018 at 12:46 AM.
s2000Junky is offline  
Old 12-02-2018, 03:15 AM
  #4  
Registered User
 
Join Date: Jan 2017
Posts: 591
Thanked 48 Times in 47 Posts
Default

Originally Posted by s2000Junky View Post
Run a air snorkel to get some fresh cold air to that intake custom or bought, otherwise you are going to be pulling extra hot engine air from elevated track temps and probably lose some power. An open filter isn't really the best option in that location without a way to get some good fresh airflow to it once the car is moving. That said, on its own the single should give you a little more on the top end where the stock tune is richest. What id be concerned with, particularly if you are running an ap2 ecu, is the overly lean condition in the 5500-7500rpm range. When you start doing anything else beyond a TP id strongly advice investing in a wideband so you can make sure you are running not too lean. Its a good investment and will aid in future tuning tool as well. More accurate then a dyno tail sniffer and pays for itself after one typical dyno test.
agree. Cold air intakes are more suitable for track cars. Main reason I'm seeking my AEM cold air intake in case you're interested.
Midnightdennis is offline  
Old 12-02-2018, 01:22 PM
  #5  
Thread Starter
 
Join Date: Nov 2011
Location: Near Chicago
Posts: 1,025
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Originally Posted by Chibo View Post
Not really, but if you get the Karcepts tune w/ Greddy EMU or another ECU that will extend the VTEC engagement window (along with the usual dyno tune adjustments) you're going to notice a pretty huge difference over stock.
Originally Posted by s2000Junky View Post
Run a air snorkel to get some fresh cold air to that intake custom or bought, otherwise you are going to be pulling extra hot engine air from elevated track temps and probably lose some power. An open filter isn't really the best option in that location without a way to get some good fresh airflow to it once the car is moving. That said, on its own the single should give you a little more on the top end where the stock tune is richest. What id be concerned with, particularly if you are running an ap2 ecu, is the overly lean condition in the 5500-7500rpm range. When you start doing anything else beyond a TP id strongly advice investing in a wideband so you can make sure you are running not too lean. Its a good investment and will aid in future tuning tool as well. More accurate then a dyno tail sniffer and pays for itself after one typical dyno test.
True, I did not consider running overly lean. I have a 02 on stock ECU
The K&N sits roughly in the same place as the oem intake, I would assume itd get the same air flow that the oem gets over the radiator. All the snorkels I see for sale are some expensive JDM shit and Im not too interested. If I feel that I lose power at speed id just go back to oem but I feel like once its moving it should be fine.

I wish I could do a dyno before and after installing these parts to see if any of it is worth it. I should consider doing a ECU but with all the other things I want to change and buy this winter i'm now just tempted to leave the whole engine mod part alone.
Danwolski is offline  
Old 12-05-2018, 11:51 AM
  #6  
 
twohoos's Avatar
 
Join Date: Feb 2001
Location: Redondo Beach
Posts: 3,623
Thanked 27 Times in 20 Posts
Default

These days most of the "reputable" bolt-ons will make a couple hp here and there (which is far better than 15 years ago, when often as not, aftermarket parts lost power). But the biggest advantage has always been weight savings: together, the OEM header and exhaust are about 75 lbs. You can lose about 50 of those with a good header and a lightweight single. Even with a dual exhaust and retaining the cat, you can save 30-40 lbs.
twohoos is offline  
Old 12-30-2018, 06:19 PM
  #7  
 
Join Date: Mar 2014
Posts: 325
Thanked 4 Times in 4 Posts
Default

takada intake/70mm throttle body/ported intake manifold took .7 off my quarter mile .2 off my sixty foot and over all made the car way more responsive and brought it to life


i added j's ti RR 70mm and wrapped header untuned and it killed me down low ( added .3 to my sixty foot) but also added +4 miles an hour to my trap speed

im going to tune it on haltch 1000 and we will see what happens
beefystud is offline  
Old 12-31-2018, 07:51 PM
  #8  
 
noodels's Avatar
 
Join Date: Nov 2013
Location: Norfolk
Posts: 3,248
Thanked 52 Times in 51 Posts
Default

AFR tested with wideband 1/1/2019 13.2:1= 7-9k rpm

Last edited by noodels; 12-31-2018 at 07:56 PM.
noodels is offline  
Old 01-08-2019, 10:02 AM
  #9  
 
Join Date: Nov 2006
Posts: 102
Thanks: 0
Thanked 2 Times in 2 Posts
Default

MotoIQ I believe did a test like this. The answer is you don't get many gains without a tune.
ThreeD is offline  
Old 01-08-2019, 12:49 PM
  #10  
Community Organizer
 
s2000Junky's Avatar
 
Join Date: Jun 2007
Posts: 27,671
Thanked 183 Times in 173 Posts
Default

All depends on where your afr lands after the bolt on. Depending on the year, some level of bolt on's give power because they lean out the afrs where factory tune runs rich. There is a point where you can start running too lean and lose power, needing to add more fuel.
s2000Junky is offline  

Quick Reply: NA mods-any gains with no tune


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands