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05-31-2016, 11:17 AM
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#1 |
        
Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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New pb but not what I was expecting
Well I recently took my new 2010 l99 to the track. Car has SLP tvs2300, custom comp cam, lt headers, corsa catback, cai, ported TB, 3.45 gears with true trac. Car was dyno'd at 613 whp at 13 psi boost on the 6l80. Car now has th400 with a tci 3200 converter and I haven't dyno'd it after the swap. New pb because I'm coming from a ls3 na to a sc l99 but was not satisfied at all. Can anyone guess what's wrong?
First run https://m.youtube.com/watch?v=OvRB02wMVuo Second run https://m.youtube.com/watch?v=y-EVZ7X6KCI Last edited by camarosspower; 05-31-2016 at 01:29 PM. |
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05-31-2016, 12:40 PM
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#2 |
 Drives: 2010 Camaro SS Join Date: Aug 2013
Location: Central PA
Posts: 438
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What did the whole slip look like on that second pass? 3.45 gears and TH400 isn't a great combination for launching a heavy car. Also, what RPM was it shifting gears at?
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05-31-2016, 01:16 PM
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#3 |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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First run
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05-31-2016, 01:18 PM
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#4 |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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2nd run.
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05-31-2016, 01:22 PM
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#5 |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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I think it launched pretty good at 3k rpm on the 2nd run. Transmission was shifting at around 5k rpm. On the first run I never let off the throttle even though it seems like i did.
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05-31-2016, 01:58 PM
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#6 |
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Writer
Drives: 2010 SS / 1967 Camaro Join Date: May 2009
Location: Chicago, IL
Posts: 7,221
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Shifting at 5K is way too low.
__________________
PROJECT HEAVY CHEVY
Camaro Now: Mods for the Masses Part I | Part II 13.15@106 1.95 | 100% Stock 12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800 |
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05-31-2016, 02:07 PM
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#7 | |
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Banned
Drives: Camaro Join Date: Mar 2013
Location: USA
Posts: 2,701
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Quote:
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05-31-2016, 02:30 PM
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#8 |
  
Drives: 2013 SS Join Date: May 2013
Location: DFW
Posts: 4,102
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5k yeah that's waaaaaay too soon to shift. You need to dial that thing in
__________________
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05-31-2016, 03:12 PM
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#9 |
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Drives: 2010 Camaro SS Join Date: Aug 2013
Location: Central PA
Posts: 438
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I agree with the shift point being too low. In addition, you could have some belt slip. Did you log boost pressure going down the track?
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05-31-2016, 03:40 PM
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#10 |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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Yea that's way to low I agree. I used to shift my ls3 at 7100 rpm. I tried shifting on my own and sometimes it cuts off so I rather not risk it. I did hold 2nd gear to 6k on the first run. But I trapped the same. My cam and geared ls3 was trapping 117. I think 116 is way too low for the l99.
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05-31-2016, 03:44 PM
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#11 | |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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Quote:
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05-31-2016, 04:14 PM
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#12 |
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Drives: 2010 Camaro SS Join Date: Aug 2013
Location: Central PA
Posts: 438
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The gear spread on the TH400 will definitely make it feel slower...especially through first gear. Some lower gears (3.91s maybe?) would probably make a big difference.
You are only adding 23MPH in the last 1/8 mile. That is kind of low for a 600WHP car. That's what made me think belt slip...but the low shift point could also be making a big impact. |
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05-31-2016, 04:32 PM
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#13 |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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Yea there is no belt slippage going on.
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05-31-2016, 04:34 PM
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#14 |
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Drives: 2010 camaro ss Join Date: Jun 2010
Location: Port Arthur, Tx
Posts: 2,383
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