Re: PROSPEED Hi-Flow Catalytic Converters!
91-94 are available? how about 95-99?
Jigs are already done. Starting production as we speak to take care of all the orders.
UPDATE
Dyno tested!
We finally had time to get the test mule on the dyno. We were pleased with the final results after adding on the Prospeed Hi-Flow Cats. The higher flowing cats really showed itself down low with an increase in torque of up to 5 ft lbs of torque at a usable 4000 rpm. We made our most torque and HP ever at 267.5 HP and 205.12 ft lbs. of torque. The only change was the Prospeed Hi-flow Cats. No fuel or ignition timing was done to the car. I am personally happy with the upgrade. Increase HP, lighter weight then OEM cat (approx. 12-13 lbs savings) and a nice deep "growling" sound exhaust. We will be testing out the 95-99 soon. We believe the restriction is greater on the later model NSX's due to the diameter of the opening on the OEM cats. check out the results below...
DETAILS
Dyno: Dynapak dynometer (Thanks to Bisi from Bisimoto engineering for using the facility)
The car has about 65,XXX miles on it (1991 NSX, 5 speed)
Mods- Stock airbox with comptech filter, Taitec GTLW exhaust, Top Speed Headers, Prospeed Stage 3 Rom Chip and Prospeed Hi-Flow Cats.
NOTE: We compared our most recent hp from the last time we dynoed on the 28th of MAY to our dyno with the Prospeed Hi-Flow Cats on the 22nd of July. Both runs were done SAE corrected to eliminate variables. Also on may 28th temps. were 78 degrees F. vs 98 degrees F. on July 22nd.
PROSPEED HI-FLOW CATS
RESULTS
Blue dotted line indicates run with comptech filter, taitec GTLW exhaust, Top Speed Headers, and Prospeed Rom Stage 3.
Blue solid line indicates run with comptech filter, taitec GTLW exhaust, Top Speed Headers, Prospeed Rom Stage 3 and Prospeed Hi-Flow Cats.
-Peak 267.5 HP with 205.12ft lbs of torque
-As you can see we picked up around 2 hp to 5 hp Throughout the power band. 5 hp at 7280rpm.
-The NSX saw excellent gains in torque gain from 2ft lbs of torque to 5ft lbs of torque.
-Torque can be felt from around 2000 to 4500 rpm.
-Noticeable increase in throttle response.
-Slightly louder then the stock OEM cats but doesn't drone or have that raspy sound normally associated with test pipes.
-Part throttle driving and cruising still remains fairly quiet. Increase in decibels when you floor it.
-12-13 lbs weight savings over OEM cat.
-Greener then a test pipe and no stinky smell or black bumpers!
-Higher flow cats will be great for forced induction applications. Perfect for the Comptech supercharger owners.
