| calbert1999 |
02-12-2011 12:47 PM |
Quote:
Originally Posted by Meister@Torq
(Post 2754406)
A couple of things to consider:
1. Our Mustang Dyno reads lower than what most are showing, which is on a dynojet. We know 575rwhp on our machine is 610rwhp on a dynojet.
2. We just finished a Maggy at 8.5psi with our blower cam and it made 610rwhp/540rwtq. On a dynojet this would be about 630-640rwhp and like 570rwtq.
3. Stock fuel pump is good to about 560rwhp on a Mustang Dyno. Fuel pressure will start to drop hard making AFR uncontrollable not allowing a tuner to hit target afr
4. A Maggy/Whipple will make way more power and torque under the curve so if there is traction that car will be faster. It is quite simple. A car that accelerates faster will be faster
http://sphotos.ak.fbcdn.net/hphotos-..._7456199_n.jpg
Look at the graph below 4500. Above 4500 the procharger fell on it's face because it was 130F in the shop and IAT's were through the roof on the procharger setup
|
It's amazing what different builders / tuners will see on varying vehicles. My shop is seeing the exact opposite results.
Most of the research I've done shows the ProCharger is running much cooler due to the larger air-to-air intercooler and knock sensors are very happy, it provides lower but steady tq down low in the power band, and higher HP's in the higher RPM ranges, where as the Maggies does the exact opposite (higher low down TQ 50-75lbs, and lower high end HP about 30-70hp's). My understanding of why this happens is the ProCharger increases the boost as it goes into the higher RPM's and really starts to shine once you're in the 4.5+RPM range, where the Maggie gives it's max boost right from the get go, and then starts to drop off as it get hot and the engine compensates with timing.
The ProCharger also has steadier numbers on every pull vs the Maggie that starts to drop HP once it gets hot; Case and point put a meth kit on the roots system to cool the cylinder temps and provide additional safety in the higher RPM ranges.
Sure, tearing around town leaving rubber streaks in the road in first and 2nd. gear is cool, but probably not very practical, and besides anything above 450rwhp. is going do spin the tires anyway.
If I planned on putting drag radials on my vehicle to run laps all day, most likely I'd get a Maggie, a meth. kit, and travel on long trips with gallons of meth. in the trunk, but with a daily driver and occassional road course driving I believe the ProCharger is a better fit for that type of driving (for me). In any case my tires are spinning already naturally aspirated.
Personally, the extra 50lbtq. or a few extra HP's aren't going to make a big difference in my life, but the added engine safety, and piece of mind is worth it for me in the end. |
