Originally Posted by
Fast4.7
The power gains from tuning feel great. However that being said the tuning has transformed EVERYTHING about the car. The transmission shifts much quicker, at WOT it shifts firm enough to chirp the tires 1-2 and 2-3. It has better throttle response off-idle and seems to never stop pulling.
I copied the values straight from Uprev tables. They are hex and will copy right into the appropriate tables.
Keep in mind every car is different, but this should be a decent starting point for a healthy car with some airflow enhancing bolt-ons. Intakes with stock diameter at the MAF, high flow or catless midpipes, headers and high flow exhaust. I tuned the MAF curve pretty well but had to lean out the high rpm decel and idle area a little in the compensation table. The MAFs are also maxed out at 278 gms/sec and hold steady there above 6,000 rpm. I had to add some fuel in the compensation table to get the engine enough to drink. I meant to say in the previous post it gained 4-5 HP in the midrange fattening up the AFR to 12.6. At peak HP it likes 13.0-13.2. I know Technosquare used to run these at 13.5 for peak power but this is not a race car and I don't want to put that kind of heat into the pistons and exhaust valves. I also had to increase fuel delivery 2% on Bank 1 to even out the air/fuel ratio and fuel trims via injector compensations. The engine ran noticeably smoother after. Years ago a company tested all different kinds of headers and exhausts on the 3.5HR. They found the best average gains with 2.25" merge collectors and 2.25" test pipes. It seems everything now is based on 2.5". Probably some torque in the low-midrange being sacraficed by the 2.5" system but this car would never plant the extra torque at WOT. I know the high flow cats are costing a couple of HP but have to have cats for visual inspection. I ported a 3.7 lower intake and plenum for it. I have the larger 3.7 injectors and 3.7 fuel rail off the same low mileage 3.7. I have not had time to play around with it. I hear the runners are shorter and it will shift my torque curve higher. I think I could get to 340 hp at the wheels with the 3.7 top end. I hear a set of 3" admin tuning intakes gain 10 hp over the best commercially available intake but I drive this car year round and would be scared to hydro lock it in these Texas downpours. If the car had a 6spd it would probably already be in the 335-340 hp range on a Dynojet.