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F24 stroker kit for race use

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Old Feb 28, 2017 | 11:17 AM
  #121  
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Yes..AP1 pisotns.13:1 compression
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Old Feb 28, 2017 | 11:19 AM
  #122  
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Originally Posted by ViperASR
CNC kit with stock AP2 pistons?
What bearings did you use with the kit?
Originally Posted by s2000ellier
he used ap1 pistons i thought, ap2 pistons did 12:1 afaik
i wanted to use OEM but my builder convinced me to use aftermarket. ACL or whatever they are called
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Old Feb 28, 2017 | 11:21 AM
  #123  
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Originally Posted by f20kills
Few things...2.2 to 2.4 with just crank swap and bump in compression (13:1), I made about 40whp more than my 2.2 same dyno.

Second...I just got my TT license, how come no one runs in TT3 or 4? If Im understanding the rules right, my car fits in TT4 perfect.
I run in TT3, but if you want to compete you really need a detuned car preferably with DBW like the BMWs and Corvettes.
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Old Feb 28, 2017 | 11:27 AM
  #124  
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Originally Posted by King Tut
I run in TT3, but if you want to compete you really need a detuned car preferably with DBW like the BMWs and Corvettes.
detune in TT3? I'm not even close in TT3 lol but was still competitive in that class that day. I wasn't running Hoosiers but was off 3 seconds from 1st place. Barely missed podium. I'll need to take off some parts but i hope TT4 has a good turn out
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Old Feb 28, 2017 | 11:45 AM
  #125  
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Originally Posted by f20kills
detune in TT3? I'm not even close in TT3 lol but was still competitive in that class that day. I wasn't running Hoosiers but was off 3 seconds from 1st place. Barely missed podium. I'll need to take off some parts but i hope TT4 has a good turn out
What I am saying is it would be better to detune and run in TT5 or TT4 then to not be at the limit or be barely at the limit even with the average whp calculations. Flat horsepower still rules in NASA TT.
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Old Feb 28, 2017 | 11:47 AM
  #126  
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Originally Posted by King Tut
What I am saying is it would be better to detune and run in TT5 or TT4 then to not be at the limit or be barely at the limit even with the average whp calculations. Flat horsepower still rules in NASA TT.
got ya. I'll run some events and see what the competition looks like. If I nees to adjust I will. Otherwise don't want to make changes I don't need to. Thanks for the heads up
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Old Feb 28, 2017 | 12:10 PM
  #127  
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Originally Posted by s2000ellier
he used ap1 pistons i thought, ap2 pistons did 12:1 afaik
Yeah f20kills used AP1 pistons which are 13:1, I used AP2 pistons which are 12:1. I didn't trust 13:1 with pump gas. With the CNC 2.4 kit my 2002 AP1's HP/TQ went from 215/129 to 258/192.

As for how to keep the car cool (as asked earlier in this thread): I upgraded to the mishimoto rad, 1.3bar koyo cap, mishimoto oil cooler, and mugen thermostat (with 3 extra small holes drilled in to more easily open). I also had my engine builder notch the bottom of my pistons to allow the AP2 banjo bolts and oil jets to be used. I also had my piston domes ceramic coated by Swaintech using their "GoldCoat". As a result I hope/think my car will stay quite cool on the track -- but it takes a while to warm up on the street.

Last edited by snitm; Feb 28, 2017 at 12:15 PM.
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Old Feb 28, 2017 | 12:18 PM
  #128  
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Originally Posted by snitm
Yeah f20kills used AP1 pistons which are 13:1, I used AP2 pistons which are 12:1. I didn't trust 13:1 with pump gas. With the CNC 2.4 kit my 2002 AP1's HP/TQ went from 215/129 to 258/192.

As for how to keep the car cool (as asked earlier in this thread): I upgraded to the mishimoto rad, 1.3bar koyo cap, mishimoto oil cooler, and mugen thermostat (with 3 extra small holes drilled in to more easily open). I also had my engine builder notch the bottom of my pistons to allow the AP2 banjo bolts and oil jets to be used. As a result I hope/think my car will stay quite cool on the track -- but it takes a while to warm up on the street.
You were having cooling issues? My car never gets above 185 on track. Even in hotter weather.
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Old Feb 28, 2017 | 12:23 PM
  #129  
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Originally Posted by f20kills
You were having cooling issues? My car never gets above 185 on track. Even in hotter weather.
Not with the 2.4 I haven't. But the reason my original AP1 engine died is the thermostat was faulty (wasn't opening properly). So I probably overcompensated with all the cooling upgrades!
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Old Feb 28, 2017 | 12:41 PM
  #130  
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Originally Posted by snitm
Yeah f20kills used AP1 pistons which are 13:1, I used AP2 pistons which are 12:1. I didn't trust 13:1 with pump gas. With the CNC 2.4 kit my 2002 AP1's HP/TQ went from 215/129 to 258/192.

As for how to keep the car cool (as asked earlier in this thread): I upgraded to the mishimoto rad, 1.3bar koyo cap, mishimoto oil cooler, and mugen thermostat (with 3 extra small holes drilled in to more easily open). I also had my engine builder notch the bottom of my pistons to allow the AP2 banjo bolts and oil jets to be used. I also had my piston domes ceramic coated by Swaintech using their "GoldCoat". As a result I hope/think my car will stay quite cool on the track -- but it takes a while to warm up on the street.

2.0 to a 2.35 is a 17.7% increase. Compression went from 11.8 to 12.0 so thats a 1% increase. 215whp x 1.177 = 253whp, So the compression bump and fresher motor is the other 5hp. So right in the expected margins.

I also did the swain tech coatings on this motor and I can't get the thing to run warm enough. It wants to drive around all the time with the thermostat closed. It opens for a moment and pumps the cold water from the radiator through it and goes back into cold running mode. Thing produces no heat. Revised the thermostat setup and put a much smaller radiator in it now. I'll know soon how it is.

Last edited by Mrsideways; Feb 28, 2017 at 12:47 PM.
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