![flowmaster headers flowmaster headers](https://images.holley.com/583x/43043.jpg)
class at Musclepalooza/Lebanon on May 27th but the true performance test will be at Englishtown on June 11th to compare with my last run there (14.01 99mph). Now, before you get too excited, I did rejet the tripower because they were running too rich, but nevertheless I believe you can attribute at least half the gain from the new exhaust. Remember, it was the car with the standard log manifolds. This was on my 65 GTO convertible that I brought down to you in early February. just thought you might want to know my results after the 2.5 inch xpipe/splitter installation.
#Flowmaster headers install#
One of our customers was nice enough to give us an update on his Pypes Exhaust install with Dyno results. Pypes system 322.8 hp & 468 torque 5500 rpms Magnaflow XL mufflers
#Flowmaster headers pro#
Pypes system 322.1 hp & 469 torque 5500 rpms Pypes Street Pro mufflers Stock system 294.1 hp & 430 torque 5500 rpms We had one of our dealers do some independent Dyno Testing and here is what his results showed: Our test car with open X-change Crossover dumps out-performed open headers by a noticable amount.
#Flowmaster headers full#
Stock HP motors may see less of an increase.ĬHART #8:Notice that the full Pypes mandrel bent system almost performed as well as the open headers car!ĬHART #9:Yes! It’s true. Since this motor has a good high performance cam, We expected these results. Un-capping the dumps gave our 300 HP motor an extra 10+ HP at the wheels.ĬHART #7:Upgrading from HO manifolds to ceramic coated headers made by Doug’s. Our X-Change is an X-pipe and dumps all rolled into one. Our tests show the need for full flow mufflers around 300 net rear wheel horsepower.ĬHART #6:Pypes newest product is two products in one. Lower HP cars tested did not show the same loss, adding credibility to the fact that more flow doesn’t always mean more HP. Additionally the test car lost about 10 HP when Flowmaster type deflector mufflers were used. But it sure sounded great!! Note the big jump when adding our mandrel bent downpipes into the Pypes X-pipe system.ĬHART #5:A moderately rebuilt Pontiac motor gets completely choked by restrictive compression bent system with stock turbo style mufflers. Tested combination: Factory short tube headers, Pypes 2½" X pipe with mini Cats, Pypes 2½" V-Force Mufflers, Pypes 2½" tailpipes.ĬHART #4:Pypes Catback only yielded 5 extra horsepower over stock because of very restictive OEM catalytic converters. In other words, there was no recognizable difference when the X pipe and mini cats were substituted in place of the factory dual catted H pipe. Every emmissions category was exactly where a completely stock 94 Mustang GT should be. At this time, we recommend full-flow mufflers when engine horsepower exceeds 400-425 hp.ĬHART #3:In this chart, the difference between running high flow catalytic converters and NO converters is minimal.ĮMISSIONS TEST FOR 1994 FORD MUSTANG >This emmissions test was performed in January of 2004 on the same Mustang that was used for the dyno tests.
![flowmaster headers flowmaster headers](https://s.yimg.com/aah/chucker54/flowmaster-flowfx-exhaust-system-kit-15.png)
Most stock lower-horsepower cars will be less likely to benefit from the additional flow. We will continue to gather data on this subject but feel that in the final analysis, the cam will dictate whether a car needs the additional flow. Thus re-igniting the ongoing arguement that the better the flow, the higher the horsepower. Also note that our Mustang did not benefit from the 498 cfm flow of the UltraFlow "straight through" mufflers vs. A Dynomax SuperTurbo was also tested with the following results: Pypes 2.5" Catback w/ SuperTurbo Mufflers Max hp = 212.6 Torque = 276.0 3300 rpmĬHART #2:Comparison shows the difference that a complete header back system can make.
![flowmaster headers flowmaster headers](https://content.speedwaymotors.com/ProductImages/378817654_L_c99aff60-60ee-4607-be4e-30ea9d2786a7.jpg)
We feel that the Merit aftermarket replacement muffler flows better and therefore should be closer to a 10-15 hp difference when going from an OEM exhaust system to Pypes or Flowmaster catback systems. OEM mufflers were not available at the time of the testing. CHART #1:Comparison shows the value of an aftermarket catback system.