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Cobra Forums
SVT Shelby GT500
Guys who drag race, looking for some input to get this car dialed in
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<blockquote data-quote="SCGallo2" data-source="post: 16216311" data-attributes="member: 160791"><p>I am not a serious drag racer, but I have about 30 passes in my car over the years while learning and gathering data. I will post a strip data log with boost, rpm, and downstream temps for comparison that you may find helpful. With a Whipple 2.9L, 3.0” upper pulley, C&R heat exchanger w/ fans, stock engine, and stock exhaust except for Borla mufflers, I am seeing right at 140*F IAT2 (downstream air temp) at the end of the quarter mile. With a 93 octane street tune, timing is being pulled at > 125*F IAT2; with a 100 octane race tune, no timing is pulled up to 140*F IAT2. I have a PFAB intercooler reservoir but have never put ice in it. Adding ice right before a run would help. Drain and put coolant back in when you get home from the track. With traction control OFF, drive through the water box then do a second gear (rev and dump clutch) burnout at 4-5k rpm for 5 seconds while gently foot-braking enough to hold your car in place, then let off the brake and power out. For launching, 3500 rpm rev with quick clutch release (not dump) works well with my car with a NT05R drag radial. Basically, you want to find the sweet spot between bogging off the line and blowing the tires off on the line. You’ll get better with more seat time.</p><p></p><p>[ATTACH=full]1578496[/ATTACH]</p></blockquote><p></p>
[QUOTE="SCGallo2, post: 16216311, member: 160791"] I am not a serious drag racer, but I have about 30 passes in my car over the years while learning and gathering data. I will post a strip data log with boost, rpm, and downstream temps for comparison that you may find helpful. With a Whipple 2.9L, 3.0” upper pulley, C&R heat exchanger w/ fans, stock engine, and stock exhaust except for Borla mufflers, I am seeing right at 140*F IAT2 (downstream air temp) at the end of the quarter mile. With a 93 octane street tune, timing is being pulled at > 125*F IAT2; with a 100 octane race tune, no timing is pulled up to 140*F IAT2. I have a PFAB intercooler reservoir but have never put ice in it. Adding ice right before a run would help. Drain and put coolant back in when you get home from the track. With traction control OFF, drive through the water box then do a second gear (rev and dump clutch) burnout at 4-5k rpm for 5 seconds while gently foot-braking enough to hold your car in place, then let off the brake and power out. For launching, 3500 rpm rev with quick clutch release (not dump) works well with my car with a NT05R drag radial. Basically, you want to find the sweet spot between bogging off the line and blowing the tires off on the line. You’ll get better with more seat time. [ATTACH=full]1578496[/ATTACH] [/QUOTE]
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SVT Shelby GT500
Guys who drag race, looking for some input to get this car dialed in
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