Mimi05SRT6 is the guy who has a long list of 11.8x slips. So far no contact. You guys likely know him. Mine is an SLK. If a high 11 is rare then whatever I can get to. Right now if the pulley comes out at 70mm I will be thrilled. That and the 178/PSK seems a perfect combo. After that I don't know. I think the stock muffler is a straight through design and if so the reason the muffler change does not add power but a nice quiet ride is OK with me. It seems my ride doing 18-19psi with just Rob's DCAI, E/C pulley(64.7mm) and a race tune for TORCO from Jerry is unusual. I just read where stock is 14.5 and the pulley adds 3.5psi today. I guess every car/motor is different. Rob said he hit 25psi with a 178/65 combo.
With TOYO PROXES R888's I think anyones car here would lunch, even Jim's quickest SLK in the world. I know a guy with a '93 Mazda with an LSx motor putting 565 to the wheels that cuts 1.5-1.6 60's. This is a car weighing less than 3k with the driver and runs 10's. The Cobra guys(yeah I am mentioning them again) swear by them and they don't run high 11's. My Cobra powered '99 Mustang had an open exhaust(no cats) a smaller pulley(14psi) and a tune and put down 440/440. My quickest car was a 122 c.i. eagle Talon, mid 11's. There are guys that run high 11's and I guess they know something that is a well kept secret or some cars just are stronger. I just want a reasonable goal. 12.3 would be fine now as it seems 11's are too expensive, difficult. On with the show. Insulating my NW DCAI pipes. Heat is an SLK issue as there is no room for the existing heat exchangers. Thanks for the help and encouragement, especially grip grip who answered every question and was instrumental in leading me to the 178/70 choice.