SRT8 Bone Stock on the Before Pull What was added to the after pull: Longtube Headers Catback Exhaust CAI Diablosport Predator Tuned by AJ-Hemituner Underdrive pulley PPP Stage 2 Heads PPP Forged Pushrods PPP Pro-Series Track Warrior You will see numerous heads/cams out there that will make more peak hp than this, but what good does it do you to have a ton of peak power and no bottom-end/mid-range. I think this graph illustrates best that you can pickup hp/tq across the board with a good set of heads and a well engineered camshaft. Not only will this setup dominate at the track, but with an average increase in tq of 62ft lbs, this car is flat-booking on the street.
I think it is confusing to most folks (me included) when you advertise estimated crank horsepower along with rwhp. Crank horsepower numbers sound impressive but are a guess based on an estimate (chassis dynos aren't absolute). The differences between runs is probably the most important things (if all conditions are the same at the dyno)
guys, the last number listed on the charts are simply crank hp ratings...... the numbers in the rpm ranges on the chart are actual rear wheel numbers...... nice set up andy and seems to be a very streetable set up with lots of USEABLE power for street driven cars!
Our engine output numbers are not a guess. The 1st 426 we ever dynoed made 560hp on the engine dyno and 463rwhp in the car. Thats a loss of 17.5%. Using that number, our stock baseline comes up with 423hp which is almost exactly what the car is rated at. The peak numbers are not what we are trying to showcase, we are simply showing the delta between stock and heads/cam. I posted in both rwhp and bhp because so many shops claim gains in bhp and others claim rwhp, we show you both.
Also IMHO its confusing to say heads/cam gains when you list all the other parts that were added at the same time
There isnt enough room in the title to say Heads/cam/headers/catback/cai/predator/tune before/after dyno results. But at least in the thread I was noted everything that was added. I could also show you a graph where longtubes gained 7hp and cai was 5hp and a catback was 3, so I dont think they were doing a whole lot in this dyno sheet.
really 7 hp from the longtubes thats it? hmmm. I thought with heads and cam they would help alot more. non the less great numers through out the rpm range andy nice job
I was thinking the same thing. Hemisfear warned me that they weren't much bang for the buck but I got them anyways.
