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Are our internals horsepower limited or boost limited?

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Old May 22, 2007 | 02:12 PM
  #21  
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Originally Posted by jayc72
Unnecessary cost. The pistion is unlikely to wear out and require replacing, rings on the other hand ... But really, do you think you'll own this car for 10 more years?
yeah, why would I sell it?
Old May 22, 2007 | 02:15 PM
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Old May 22, 2007 | 02:38 PM
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Originally Posted by Lex
what is your guys' minimum ignition advance under boost?
19°

4k, 8psi.
Old May 22, 2007 | 02:53 PM
  #24  
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4500rpm, 93 pump gas
17° - 8psi
14° - 12psi
12° - 15psi
Old May 22, 2007 | 02:59 PM
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I was hitting 21-22° at 12.5 psi at 4500RPM, probably have room for more advance
Old May 22, 2007 | 03:02 PM
  #26  
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15° minimum, ~15 psi @ tq peak

brainy i'm around 17-18 at 12psi. no we didn't push it until detonation, but adding more timing didn't make more power.
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Old May 22, 2007 | 03:10 PM
  #27  
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hmm, looks like I can safely add quite a bit more timing, especially since I am running on 94 octane and 8.2 compression.

I used flyingmiata's ignition map as a base.
Old May 22, 2007 | 03:13 PM
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Awesome ****, guys. That's what I wanted to hear. My goal is to have two maps, a normal 12psi 91 ****-water map and a 15, mabye even 17+psi map once I get a water injection setup. I probably won't push past 275rwhp or so until the motor is built, but I think I can hit that number even on a small T25 and big boost as long as I can keep the intake temps and detonation down (perfect use for WI).
Old May 22, 2007 | 03:32 PM
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Originally Posted by Lex
I used flyingmiata's ignition map as a base.

yeah, that was my problem...I also had a 2° retard (i suck) so I was closer to 19-20°

right now my targets are 20° @ 180 kPa; 18° @ 210; and 16° @ 230

I was still making more power as I advanced it, but the returns were starting to become dimishing, my fuel was also way off, so it will probably be altered some. KnocksenseMS is 85% wired up, so I'll be able to make sure all is kosher and ready for my real dyno tuning session.
Old May 22, 2007 | 04:13 PM
  #30  
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Originally Posted by Braineack
yeah, that was my problem...I also had a 2° retard (i suck) so I was closer to 19-20°

right now my targets are 20° @ 180 kPa; 18° @ 210; and 16° @ 230

I was still making more power as I advanced it, but the returns were starting to become dimishing, my fuel was also way off, so it will probably be altered some. KnocksenseMS is 85% wired up, so I'll be able to make sure all is kosher and ready for my real dyno tuning session.
Hmm, so why is FM using so much retard on their big turbo kits?
Old May 22, 2007 | 04:18 PM
  #31  
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Originally Posted by Lex
Hmm, so why is FM using so much retard on their big turbo kits?
cuts down on "FM blew up my engine!!!11!!one!!!" complaints.

seriously tho they make it for bad gas and lots of margin of safety.
Old May 22, 2007 | 05:29 PM
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i'm still using FM's stock map..
Old May 22, 2007 | 05:32 PM
  #33  
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That's OK, you can run 89 octane then.
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Originally Posted by concealer404
Buy an MSPNP Pro, you'll feel better.
Old May 22, 2007 | 06:15 PM
  #34  
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i advanced it 2 degrees, i think i can go a bit more.. i have no knock as far as the knock sensor sees anyway..
Old May 23, 2007 | 04:11 PM
  #35  
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Ben and Brain, do you guys mind posting up a screenshot of your current ignition maps (
Old May 23, 2007 | 04:19 PM
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should be in my "why i think timing is important thread" but here:




Ben's should be in his "I'm squirting" thread, should look similar.


I have yet to do much testing of this table as I'm not currently driving it untill I get my LC-1 back from innovative. Then I'm getting on a loaded dyno to do some comprehensive tuning. But as is at 12.5psi, I had no signs of knock and the power output seemed butt-dyno friendly.
Old May 23, 2007 | 04:23 PM
  #37  
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Thanks! how come you are running 14 degrees timing at idle?
Old May 23, 2007 | 04:36 PM
  #38  
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Originally Posted by Lex
Thanks! how come you are running 14 degrees timing at idle?
My map is close enough to brainy's. Why not run 14 deg?
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Buy an MSPNP Pro, you'll feel better.
Old May 23, 2007 | 04:51 PM
  #39  
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Originally Posted by Ben
My map is close enough to brainy's. Why not run 14 deg?
I thought stock was around 10 and was wondering if there was a reason for the 14.
Old May 23, 2007 | 10:44 PM
  #40  
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stock base timing is 10, but without TEN and GND shorted, it varies. measure it sometime.



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