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#21 |
![]() Join Date: Nov 2006
Location: dayton,ohio
Posts: 425
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Let us know how it goes. Have fun!
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[FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] |
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#22 |
![]() Join Date: Sep 2010
Location: Currituck, NC
Posts: 246
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Added dyno sheets to post #19
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#23 |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Ah, Ha! I kinda suspected that! There's more gold in that thar LT5.
For comparison, a selection of curves I have on file; one (my first one = stock/Borla) and the rest = various mods. Ingnoring the numbers, it is the characteristic shape of the torque/power curves vs. rpm that I am trying to illustrate for comparision. See whatcha think... My stock w/Borla (only) ![]() Two for one: Don's and Dominic's after P&P, and Dom's with headers too maybe?? ![]() A 415 creation by Marc... ![]() A 350, fully ported, stock cams and headers/3" exhaust... ![]() And now, if I may draw your attention to your torque vs. power curve... 2012 ![]() The torque curve is falling off too soon. I kinda thought from that stock 309 hp figure that there must be some more oomph hiding in there. Looks like there should be another 25-30 to be had if the reason for the torque collapsing could be addressed?? Something. (Cam timing crossed my mind first; is why I asked about compression check results. If one side was significantly different by comparision, it could be that "something".) Spark? Cam timing? Who knows. I can analyze data and graphs with the best of 'em. But, for some real expertise, maybe Marc or Pete can shed some light on it. Something like 20-30 hp more to look forward to! P.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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#24 |
![]() Join Date: Sep 2010
Location: Currituck, NC
Posts: 246
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Thanks Paul! "When" it starts to drop off doesn't look to be too bad! It's the linear dive vs. the gradual curve down as seen on the other graphs that concerns me.
Here's a graph from my buddies stock 93 with Power Effects. 1st pull...key off & power effects open...HP-238.49 TQ-308.21 2nd pull...key on & power effects open...HP-360.81 TQ-332.90 3rd pull...key on & power effects closed...HP-346.94 TQ-332.07 ![]() |
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#25 |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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Stock LT5's should be peaking around 5900 rpm...maybe a couple of hundred rpm higher for the 405hp cars.
I would not get too carried away with wondering how the cams are timed etc until you check the fundamentals. You should be able to pull to 6000, especially with headers. Is your intake boot collapsing? Looks like you have plenty of fuel up high..like too much, I would have expected 12.5 AFR from the factory VE table. ON Edit: extrapolating that curve should put you at at least 350+ whp Last edited by mike100; 02-14-2012 at 04:53 PM. |
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#26 |
![]() Join Date: Sep 2004
Posts: 35
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Best of Luck on the track. Wish I were there to see her get back in the Road Course Saddle with other cars on track. At least she is not going to have to deal the the famous "Kink" and add a third Red, Red '91 ZR-1 to the loop de loop group Brooke and I started!
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1991 Red-Red #978 |
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#27 | |
![]() Join Date: Aug 2011
Location: Evergreen, Co.
Posts: 346
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