straight pipe or High flow cat?
#1
Junior Member
Thread Starter
iTrader: (1)
Join Date: Apr 2005
Location: Bethesda, MD
Posts: 430
Total Cats: 9
straight pipe or High flow cat?
I have a 2.5" Racing Mazda DP and 2.5" Enthuza turbo exhaust with a crappy stock cat. I think changing out the stock, 17 year old, 1.5" cat would give me a significant loss of backpressure. Im wondering which of the two, test pipe or high flow cat would give me more power? I dont care about legal issues because i dont mind switching out either before an emissions test every 2 years. Also, an increase in noise wouldnt bother me.
#4
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,508
Total Cats: 4,080
most high flows should flow enough CFMs that's it not going to be a big effect vs. a test pipe.
with that said, i'd i wouldn't buy the JR unit. Give turbo tony a buzz and have him make you a 2.5" one for under $100.
with that said, i'd i wouldn't buy the JR unit. Give turbo tony a buzz and have him make you a 2.5" one for under $100.
#12
Former Vendor
iTrader: (8)
Join Date: Mar 2005
Location: Broken Arrow,Ok
Posts: 1,185
Total Cats: 57
wow, I imagine your car is a tad loud there bravo... I just replaced my magnaflow cat with a test pipe, and I think it may have made it breathe a bit easier. The test pipe is going to be cheaper.. its just a piece of pipe with 2 flanges, i.e. should be like $20 or so.
-Michael-
-Michael-
#13
+1 on the test pipe. I had to put a cat in for emissions as they also do a visual inspection, I noticed a significant difference in spool with a test pipe vs. HF cat. I know that the tests have shown very little difference in final HP between the two, but I don't think that they looked at the difference in power curve/spool with boosted applications.
Just another note, on club drives people will NOT want to drive behind you.
Just another note, on club drives people will NOT want to drive behind you.
#16
Yeah, the power might be better with the test pipe, but if you run on tours with groups, you'll be at the back. Trust me, it sucks. I had a hollowed cat for a while.... and I hated it. The stick was rough.... (of course this was with a motor burnin' oil too. <G>)
Not worth it IMHO......
Dave,
Not worth it IMHO......
Dave,
#18
Yeah, the power might be better with the test pipe, but if you run on tours with groups, you'll be at the back. Trust me, it sucks. I had a hollowed cat for a while.... and I hated it. The stick was rough.... (of course this was with a motor burnin' oil too. <G>)
Not worth it IMHO......
Dave,
Not worth it IMHO......
Dave,
I like the smell of raw exhaust fumes from a car w/ no cat. It is well worth not having a CAT. The cat robs power and spoolup, why would I want it at all?