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2013-14 Shelby GT500
The Resurrection of "The ACCUSER"
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<blockquote data-quote="Bad Company" data-source="post: 17029309" data-attributes="member: 141815"><p>Hey J</p><p></p><p>I actually reached out to Mark about this dyno test they ran between the 4.2 and 4.7 SC. Shawn feels my exhaust system is adding a very large amount of Hp due to less exhaust restrictions. Shawn wanted to know what exhaust modifications were on Mark's car during this testing. ARH LT 2" primaries with 3" collector and X-pipe into a stock mid-pipe with a free flowing set of mufflers was his answer. We will see if my radical exhaust system is as free flowing as he thinks it is. </p><p></p><p>As far as the wastegate system is concerned Shawn feels he can control boost at wide open throttle down to around 8 psi. With being able to limit boost this low traction on the street shouldn't be an issue. Shawn wants me to install a set of M/T DOT drag tires for the most traction, he says they're the best at hooking on the street from his past experiences. I'm not as interested in what it takes to have the most traction in a straight line on the street as I am about what the tires can handle in twist and turns. I think the next street tires will be Michelin Sport Cup 2 Rs in 285 for the front and 315 for the rear. Talking to Shawn the traction control is going to clamp down on boost to retain traction. I believe he is going to use the MoTec and the Ford ABS Module to monitor front and rear wheel speed biases to see if the rear tires are spinning. If the MoTec see wheel spin it will drop boost quickly. Once boost is down and if the tires are still spinning the next things will be to close the throttle blade and retard ignition timing. He feels that the wastegate system will be able to drop the boost more than enough to control wheel speed without having to resort to closing the TB or retarding timing. </p><p></p><p>I agree with your comments about high Hp output street cars being compromises, yet I'm hoping with the modifications done to this car I have the car as tame as possible while producing the most possible. Now my ideas of how the car rides, handles and the noise it produces inside the car versus what someone else thinks is always an interpretation of what each individual is willing to put up with. I'm ole school and 40-45 years ago cars were very raw compared to today's cars. I made sure the A/C system works to keep me cool ; ), even if the noise from this car can be heard a 1/2 mile away LOL</p><p></p><p>On the earlier post I made a mistype in the fact I stated the wrong size upper on the 4.2L combo. I've edited and corrected the earlier post. </p><p></p><p>I miss hearing about BIRDDOC's car and what has been changed on it since he sold it last year. It is down in Rowlett TX in the shop of Y2 Racing and they haven't posted any updates on it since last September, it makes me wonder what has happened to the car. I'm glad you're still putting his parts to good use.</p><p></p><p>As far as the 4.2 coming off of my car it will be for sale. I'll need to get the lower mounting plate and an installation hardware kit before I sell it. The purchaser will need to purchase the TB of their choice, cold air intake and air filter. The 4.2 doesn't have many miles on it at all, along with a number of dyno runs over the years. I know it is less than 500 miles on it. You interested ??? : )</p></blockquote><p></p>
[QUOTE="Bad Company, post: 17029309, member: 141815"] Hey J I actually reached out to Mark about this dyno test they ran between the 4.2 and 4.7 SC. Shawn feels my exhaust system is adding a very large amount of Hp due to less exhaust restrictions. Shawn wanted to know what exhaust modifications were on Mark's car during this testing. ARH LT 2" primaries with 3" collector and X-pipe into a stock mid-pipe with a free flowing set of mufflers was his answer. We will see if my radical exhaust system is as free flowing as he thinks it is. As far as the wastegate system is concerned Shawn feels he can control boost at wide open throttle down to around 8 psi. With being able to limit boost this low traction on the street shouldn't be an issue. Shawn wants me to install a set of M/T DOT drag tires for the most traction, he says they're the best at hooking on the street from his past experiences. I'm not as interested in what it takes to have the most traction in a straight line on the street as I am about what the tires can handle in twist and turns. I think the next street tires will be Michelin Sport Cup 2 Rs in 285 for the front and 315 for the rear. Talking to Shawn the traction control is going to clamp down on boost to retain traction. I believe he is going to use the MoTec and the Ford ABS Module to monitor front and rear wheel speed biases to see if the rear tires are spinning. If the MoTec see wheel spin it will drop boost quickly. Once boost is down and if the tires are still spinning the next things will be to close the throttle blade and retard ignition timing. He feels that the wastegate system will be able to drop the boost more than enough to control wheel speed without having to resort to closing the TB or retarding timing. I agree with your comments about high Hp output street cars being compromises, yet I'm hoping with the modifications done to this car I have the car as tame as possible while producing the most possible. Now my ideas of how the car rides, handles and the noise it produces inside the car versus what someone else thinks is always an interpretation of what each individual is willing to put up with. I'm ole school and 40-45 years ago cars were very raw compared to today's cars. I made sure the A/C system works to keep me cool ; ), even if the noise from this car can be heard a 1/2 mile away LOL On the earlier post I made a mistype in the fact I stated the wrong size upper on the 4.2L combo. I've edited and corrected the earlier post. I miss hearing about BIRDDOC's car and what has been changed on it since he sold it last year. It is down in Rowlett TX in the shop of Y2 Racing and they haven't posted any updates on it since last September, it makes me wonder what has happened to the car. I'm glad you're still putting his parts to good use. As far as the 4.2 coming off of my car it will be for sale. I'll need to get the lower mounting plate and an installation hardware kit before I sell it. The purchaser will need to purchase the TB of their choice, cold air intake and air filter. The 4.2 doesn't have many miles on it at all, along with a number of dyno runs over the years. I know it is less than 500 miles on it. You interested ??? : ) [/QUOTE]
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The Resurrection of "The ACCUSER"
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