Ky Turbo: Stck Bottom end
06-27-2012, 02:55 PM
#1
Ky Turbo: Stck Bottom end We have been having boost creep problems when running the open dp, so we built some exhaust with a slip on bullet to create some back pressure. The car is a stock SS with 46xxx, z06 cam, e85, pt7675, etc. The attached graph is with an open dp.
Dynoed the car yesterday on Fuel Injection's Mustang dyno. We made a pull with the new 3 inch bullet, the car made 489 rwhp on 12 degrees timing at 9.5 lbs pulling it to 5200 rpm. That was with the 7.5 lb spring in the wastegate. This was with the car spinnning on the dyno.
We pulled the bullet off, and made another pull to 5400 rpm. The car made 595 rwhp on 13 degrees timing and the boost creeped to 12.5 lbs. Attached is the graph from the second pull.
It goes back on the dyno in about an hour with the bullet to finish the tune. On 10lbs, we think it will make 540 rwhp with 13 degrees timing pulling it to 6k. Also, the car is on e85.
Dynoed the car yesterday on Fuel Injection's Mustang dyno. We made a pull with the new 3 inch bullet, the car made 489 rwhp on 12 degrees timing at 9.5 lbs pulling it to 5200 rpm. That was with the 7.5 lb spring in the wastegate. This was with the car spinnning on the dyno.
We pulled the bullet off, and made another pull to 5400 rpm. The car made 595 rwhp on 13 degrees timing and the boost creeped to 12.5 lbs. Attached is the graph from the second pull.
It goes back on the dyno in about an hour with the bullet to finish the tune. On 10lbs, we think it will make 540 rwhp with 13 degrees timing pulling it to 6k. Also, the car is on e85.
07-03-2012, 02:17 PM
#4
Thanks...very happy with the amount of power and safe tune-up we have in it. Swapping in a 50 mm wastegate and going to take the exhaust over the axle into a CME in the upcoming months. Hopefully be able to keep the boost under control and be able to pull the motor a little higher.
