JDM Tuning Expert advice and discussion on JDM tuning for your S2000.

AP2 2.2L 9,000 RPM increased

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Old Aug 21, 2006 | 09:43 PM
  #11  
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Originally Posted by BlackTrax,Aug 21 2006, 09:20 PM
The rod stroke ratio is lower on the ap2. This lower ratio increases piston speeds and piston to cylinder wall loading.

This link may help.


https://www.s2ki.com/forums/index.php?showt...0&#entry5147807
thank you, it did indeed help.
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Old Aug 21, 2006 | 09:49 PM
  #12  
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Sam put down some very nice #'s with his F22 with the AP1 ecu for a NA car, I was impressed.
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Old Aug 22, 2006 | 04:40 PM
  #13  
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It's not the head or valvetrain, it's rod angle and side load that are the danger. The F22C doesn't make anymore power after about 8300rpm, so why take it to 9 anyways? If you build the motor up some and give a good tune using EMS you could make more power up high, but with just an AP1 ECU you don't need to rev to 9
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Old Aug 22, 2006 | 04:52 PM
  #14  
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Originally Posted by Highrpmek,Aug 22 2006, 04:40 PM
It's not the head or valvetrain, it's rod angle and side load that are the danger. The F22C doesn't make anymore power after about 8300rpm, so why take it to 9 anyways? If you build the motor up some and give a good tune using EMS you could make more power up high, but with just an AP1 ECU you don't need to rev to 9
Honda engineers would just keep the 9k rev limiter if it didnt pose a problem with the 2.2 engine. Why somebody would reverse engineer there car is beyond me
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Old Aug 22, 2006 | 05:48 PM
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My AEM EMS was raised to 8800 and so far its made nothing but more power right up to the new redline and no problems yet.....i am planning on getting my valvetrain upgraded soon when i put the charger on with the 10lb pulley and would like 9500 which would really help me cut some lap times out at my local track as i would always bounce the rev limiter before 3 different corners at 8100 rpm and didn't have enough time to shift up then down 3 gears for turn 1......so the higher RPM really helps me with stretching a little more gear at the track......but there is no need on the street.....LATER, BILL


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Old Aug 22, 2006 | 07:07 PM
  #16  
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^^^ your car looks amazing.
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Old Aug 22, 2006 | 08:29 PM
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Thanks.....it just took home best JDM Aftermarket at Import Fusion which is a regional East Coast show....not as big as Hot Imports Nights....but bigger than a local car show....at least my S gets track time and daily commute time unlike alot of JDM cars in the country that get trailered around from show to show....here are some other pics....







and here is what i was talking about above with bouncing off the rev limiter when it was stock @8100......this straight away i am at the top of 5th at the start finish line and you can see how much further it goes until brakeing in turn 1.....so i need more Rpm becaue i don't have time to hit 6th....then go down to 3rd into turn 2 with my Cusco Diff locked up chirping away at the rear tires under brakeing.....i have to stay in 5th for sure.....and the higher 8800 rpm lets me get away with it.....and helped me pick up over 1/2 a second....which is a big deal to me at the track....the 3rd pic is another place where i was hitting stock rev-limiter in 3rd gear......and immediately slowing for brakeing.....i am now able to take 3rd gear further before brakeing.....another big pickup in time....and there was 1 more turn not picture.....i am putting the charger on this fall with a 10lb pully so that will change everything.....at the bottom is a pic of a Comptech i am installing on a fellow club members AP2 in my garage right now.....i am just about to wrap up the intercooler and then off to the dyno.....LATER, BILL




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Old Aug 22, 2006 | 08:42 PM
  #18  
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Originally Posted by Highrpmek,Aug 22 2006, 04:40 PM
It's not the head or valvetrain, it's rod angle and side load that are the danger. The F22C doesn't make anymore power after about 8300rpm, so why take it to 9 anyways? If you build the motor up some and give a good tune using EMS you could make more power up high, but with just an AP1 ECU you don't need to rev to 9
I know the F20C trails off at either 8500 or 8700 I'd have to check my dyno sheet to be positive of which one. Obviously with mods you can increase the RPM band as well as make power at top end.
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Old Aug 22, 2006 | 09:18 PM
  #19  
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I know I am going to get flame for this but the main reason for the red line increase is to have the blinking red section of the tach blink with out hitting the rev limiter =)

The supercharger makes you hit the limiter VERY fast.
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Old Aug 22, 2006 | 09:20 PM
  #20  
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Originally Posted by BlackTrax,Aug 21 2006, 09:20 PM
It sure did, thanks a lot !!!!
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